Abstract

22232232222233 molar ratio satisfying 14.50 to 20.50, and has a coefficient of thermal expansion of up to 9 ppm/K and a surface roughness (Ra) of up to 10 nm. The glass substrate has a surface roughness suitable for forming fine patterns, exhibits excellent thermal properties, and is advantageous for use as semiconductor core substrates. The substrate allows fabrication as large-area thin-film, facilitates the formation of fine via holes, and enables the adjustment of physical properties according to intended applications through variation in heat treatment conditions, thereby being useful as an interposer.

IPC Classes  ?

• C03C 3/083 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound
• C03C 4/04 - Compositions for glass with special properties for photosensitive glass
• H01L 23/15 - Ceramic or glass substrates
• H01L 23/498 - Leads on insulating substrates

Abstract

Provided is a dental bulk block comprising a crystalline phase includes lithium disilicate as a main crystalline phase and eucryptite as a sub-crystalline phase in an amorphous glass matrix that is a functionally graded material having a main crystalline size gradient with respect to the depth thereof, and having no interface at the point of change in the main crystalline size gradient value, and is useful for manufacturing artificial teeth having structural characteristics similar to those of natural teeth, is facile to machine into an artificial tooth prosthesis due to the inclusion of eucryptite as the sub-crystalline phase compared to when only lithium disilicate exists, and can not only shorten the manufacturing time, but also increase the structural stability in terms of force distribution through functional grading of mechanical properties.

IPC Classes  ?

• A61K 6/833 - Glass-ceramic composites
• A61C 5/73 - Composite crowns
• A61C 5/77 - Methods or devices for making crowns

Abstract

The present invention relates to a composite bulk block for dental prosthesis fabrication, a manufacturing method therefor, and a prosthesis fabricated therefrom. The composite bulk block for dental prosthesis fabrication comprises a glass ceramic matrix and a polymer, wherein the glass ceramic matrix consists of an amorphous glass matrix and crystalline phases dispersed therein and has an average particle size of 3 to 10 μm, the crystalline phase including at least one selected from a lucite crystal phase and a lithium disilicate crystal phase, and the polymer is included in an amount of 20 to 40 wt% on the basis of the total weight of the bulk block and contains amphoteric ionic groups. The present invention provides a composite bulk block for dental prosthesis fabrication which enables the fabrication of restorations that possess excellent mechanical properties and antifouling characteristics through machining.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/083 - Porcelain or ceramic teeth
• A61C 5/30 - Securing inlays, onlays or crowns
• A61C 5/70 - Tooth crownsMaking thereof
• A61K 6/80 - Preparations for artificial teeth, for filling teeth or for capping teeth

Abstract

The present invention relates to a fixing holder for mounting an object to be machined to a cutting machine, the object being integrally connected to an abutment, the fixing holder including: a connection part connected to a jig of the cutting machine; and a coupling part provided on the other side of the connection part in the longitudinal direction and coupled to an end part of the abutment.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• B24B 5/02 - Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfacesAccessories therefor involving centres or chucks for holding work
• B23Q 7/00 - Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting

Abstract

Disclosed in the present invention is a composite bulk block for manufacturing a dental prosthesis, in which a glass ceramic matrix is composed of an amorphous glass matrix and a crystal phase dispersed in the glass matrix, the crystal phase including, as the main crystal phase, at least one selected from a lucite crystal phase and a lithium disilicate crystal phase, and polymer is included in an amount of 20-40 wt% with respect to the weight of the entire bulk block, and the composite bulk block has a gradient of a light transmittance along the depth direction and has an interface at a change point of the light transmittance gradient value. Thus, the composite bulk block for manufacturing a dental prosthesis is provided which enables quick and easy processing of an aesthetic and functional restoration while simulating a natural tooth.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/083 - Porcelain or ceramic teeth
• A61C 13/087 - Artificial resin teeth
• A61C 13/09 - Multilayer teeth

Abstract

The present disclosure provides a large-area blank wherein no crystal-phase peak exists in the range of 2θ 10-70, and the degree of crystallinity of 0.00% in an X-ray diffraction analysis pattern using CuKα rays, but crystalline particles having an average particle size of 10-70 nm are confirmed to be distributed in an amorphous SiO2—Li2O—Al2O3-series glass matrix from an SEM-based analysis, and the blank has a long-axis length of at least 60 mm and a thickness of at least 6 mm. The present disclosure has the following advantages: the blank is a workpiece having a large area and excellent processability such that processability can be improved during cutting, thereby reducing tool resistance and wear ratio, and increasing the tool lifespan; edge chipping can be reduced during processing; when fabricating multiple dental restorations successively by using a single blank, the blank use efficiency can be improved, and dental restoration productivity can be improved.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same

Abstract

The present invention comprises: a material unit providing a predetermined machining area which is placed in direct contact with a machining tool of a machining device, and having multiple sides; insertion members formed on side edges of the material unit and having a thickness smaller than the thickness of the material unit; and guard portions that are mounted via the insertion members onto sides of the material unit and may be in direct contact with a jig of the machining device, the jig having a circular frame form.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• B24B 5/02 - Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfacesAccessories therefor involving centres or chucks for holding work
• A61C 3/00 - Dental tools or instruments

Abstract

Methods for manufacturing a glass-ceramic substrate and a glass-ceramic substrate manufactured thereby. The method comprises a step of manufacturing a predetermined-shaped substrate from a specific bulk glass composition, followed by heat treatment step. In the method, the heat treatment step is performed by one method selected from: a) a method of raising and maintaining the temperature within a maximum temperature range of 500° C. to 650° C.; b) a method of raising and maintaining the temperature within a maximum temperature range of 650° C. to 700° C.; c) a method of raising and maintaining the temperature within a maximum temperature range of 700° C. to 800° C.; and d) a method of raising and maintaining the temperature within a maximum temperature range of 800° C. to 870° C., whereby the method is capable of easily manufacturing several types of glass-ceramic substrates with various combinations of flexural strength and light transmittance.

IPC Classes  ?

• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
• C03C 23/00 - Other surface treatment of glass not in the form of fibres or filaments

Abstract

Disclosed is a bulk block for manufacturing a prosthesis having high aesthetics and processability required for one-day dental prosthetic materials, which is a dental composite bulk block comprising a glass ceramic matrix and a polymer, wherein the glass ceramic matrix consists of an amorphous glass matrix and a crystalline phase dispersed in the glass matrix, the crystalline phase comprises as a main crystalline phase at least one selected from a leucite crystalline phase and a lithium disilicate crystalline phase, and has an average particle diameter of 0.01-1.0 μm, and the polymer is included in an amount of 20-40 wt % with respect to the weight of the total bulk block. The bulk block has the advantages of improved mechanical properties, being capable of preventing microleakage, exhibiting excellent aesthetics, and enabling machining.

IPC Classes  ?

• A61K 6/833 - Glass-ceramic composites
• A61C 13/083 - Porcelain or ceramic teeth
• A61K 6/17 - Particle size
• C03B 32/02 - Thermal crystallisation, e.g. for crystallising glass bodies into glass-ceramic articles
• C03C 4/00 - Compositions for glass with special properties
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
• C03C 14/00 - Glass compositions containing a non-glass component, e.g. compositions containing fibres, filaments, whiskers, platelets, or the like, dispersed in a glass matrix

Abstract

Dental bulk blocks for cutting machining are provided. The dental bulk block is a glass ceramic block having a structure in which crystalline phases including lithium disilicate as a main crystalline phase and lithium phosphate and at least one of cristobalite and tridymite as additional crystalline phases in an amorphous glass matrix. The dental bulk block is a functionally graded material (FGM) having gradations of size in the main crystalline phase along a depth direction thereof and having no interface at a gradation value change point at which a gradation value of size in the main crystalline phase changes. The dental bulk block is useful for the manufacture of artificial dental prostheses similar to natural teeth. Therefore, the present disclosure provides the effect of reducing the time and process of manufacturing artificial teeth protheses and increasing structural stability in teams of force distribution by functionally grading physical properties.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• A61K 6/833 - Glass-ceramic composites
• C03B 25/02 - Annealing glass products in a discontinuous way
• C03B 32/02 - Thermal crystallisation, e.g. for crystallising glass bodies into glass-ceramic articles
• C03C 4/00 - Compositions for glass with special properties
• C03C 4/02 - Compositions for glass with special properties for coloured glass
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition

Abstract

A dental bulk block for machining, which is a glass-ceramic block including a crystalline phase in an amorphous glass matrix. The bulk block is a functionally graded material including crystalline phases where among the crystalline phases, a main crystalline phase is lithium disilicate, and an additional crystalline phase includes quartz, lithium phosphate, and at least one selected from among cristobalite and tridymite, in which the main crystalline phase has a size gradient with respect to a depth, and no interface is present at a point where a size gradient value of the main crystalline phase changes. Thus, the bulk block is useful in manufacturing artificial tooth prostheses that are similar to natural teeth and thus can not only reduce the time and processes for manufacturing artificial tooth prostheses but also obtain the effect of enhancing structural stability in terms of force distribution based on functionally graded mechanical characteristics.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• A61K 6/833 - Glass-ceramic composites
• C03B 19/02 - Other methods of shaping glass by casting
• C03B 25/02 - Annealing glass products in a discontinuous way
• C03B 32/02 - Thermal crystallisation, e.g. for crystallising glass bodies into glass-ceramic articles
• C03C 4/00 - Compositions for glass with special properties
• C03C 4/02 - Compositions for glass with special properties for coloured glass
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition

Abstract

The present invention comprises: a material part which provides a predetermined machining area that comes in direct contact with a machining tool of a machining apparatus, and which forms a plurality of side surfaces; loading grooves formed on the side surfaces of the material part; and guard parts which are mounted on the side surfaces of the material part by using the loading grooves, and which come into direct contact with a circular frame-shaped jig of the machining apparatus.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same

Abstract

The present invention relates to an additive-manufacturing-type hybrid ceramic dental prosthesis comprising: an organic matrix; and ceramic powder dispersed in the organic matrix, wherein the amount of the organic matrix is 35-50 wt% of the total weight, and the surface of the ceramic powder is treated with a silane coupling agent and the amount of the ceramic powder is 50-65 wt% of the total weight, and disclosed is an invention which has an aesthetically pleasing appearance due to color and light transmittance similar to natural teeth and has sufficient strength to be useful as temporary teeth, and in which various types of prostheses can be rapidly realized in a personalized form through an additive manufacturing method, thus enabling one-day prosthetic treatment and reducing waste of materials, and in a processing process, an inorganic material in a composition maintains a state of being uniformly dispersed in the entire composition such that physical properties, such as color and light transmittance aesthetically similar to natural teeth and sufficient strength to be useful as temporary teeth, can be uniformly realized in the entire final prosthesis.

IPC Classes  ?

• A61C 13/083 - Porcelain or ceramic teeth
• A61C 13/00 - Dental prosthesesMaking same
• B33Y 80/00 - Products made by additive manufacturing
• C08K 9/06 - Ingredients treated with organic substances with silicon-containing compounds
• C08K 3/40 - Glass
• C08K 5/5419 - Silicon-containing compounds containing oxygen containing at least one Si—O bond containing at least one Si—C bond
• C08L 101/08 - Carboxyl groups
• C08F 2/44 - Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
• C08F 2/50 - Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light with sensitising agents
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition

Abstract

A dental implant, and a manufacturing method for the same. The dental implant includes a form in which, in order to increase the strength of the connection between a metallic abutment and a dental prosthesis, the abutment and the prosthesis are integrally connected, wherein the prosthesis and the abutment are integrally connected to each other by means of a forming method.

IPC Classes  ?

• A61C 13/08 - Artificial teethMaking same
• A61C 8/00 - Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereonDental implantsImplanting tools
• A61C 13/087 - Artificial resin teeth

Abstract

Provided is a dental blank. The dental blank includes: a seating portion provided in an artificial tooth processing apparatus; and a material portion configured to be inserted into the seating portion, wherein the material portion includes a plurality of outer contacting portions in contact with an inner side of the seating portion, and may have a polygonal shape in a cross-section.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same

Abstract

22233-series glass matrix from an SEM-based analysis, and the blank has a long-axis length of at least 60mm and a thickness of at least 6mm. The present invention is advantageous as follows: the blank is a workpiece having a large area and excellent processability such that processability can be improved during cutting, thereby reducing tool resistance and wear ratio, and increasing the tool lifespan; edge chipping can be reduced during processing; when fabricating multiple dental restorations successively as needed by using a single blank, the blank use efficiency can be improved, and dental restoration productivity can be improved; high-strength dental restorations having different degrees of transparency can be manufactured from processed dental restorations through simple processes with different post heat treatment conditions; and dental restorations that implement various shades can be manufactured through a single blank, thereby contributing to circulation management simplification.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/083 - Porcelain or ceramic teeth
• A61C 5/70 - Tooth crownsMaking thereof
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
• C03C 3/097 - Glass compositions containing silica with 40% to 90% silica by weight containing phosphorus, niobium or tantalum
• C03C 3/085 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
• C03C 4/00 - Compositions for glass with special properties
• C03B 11/12 - Cooling, heating, or insulating the plunger, the mould, or the glass-pressing machine

Abstract

The present invention relates to a hybrid ceramic prosthesis, and disclosed is a hybrid ceramic prosthesis that is useful as a pre-molded crown such as a primary crown, the prosthesis using a novel hybrid ceramic material so as to have color and transparency aesthetically similar to those of a natural tooth, enabling the amount of tooth removal during treatment to be minimized, and being fundamentally combined with a tooth through snap-fit fastening, so as to reduce the burden of reintervention due to prosthesis detachment, and having relatively convenient application compared with that of conventional materials such that a one day-one stop prosthesis procedure is possible, and thus the burden of dental treatment on patients can be reduced.

IPC Classes  ?

• A61C 13/08 - Artificial teethMaking same
• A61C 13/083 - Porcelain or ceramic teeth
• A61C 13/087 - Artificial resin teeth

Abstract

Proposed is a hybrid ceramic prosthesis. Since the prosthesis is made of a novel hybrid ceramic material, the prothesis has a similar color and transmittance to natural teeth, minimizes tooth removal during preparation for placement of the prothesis, is securely attached to the target tooth by snap-fit fastening to prevent detachment of the prothesis and re-treatment caused by the prothesis detachment, and can be more conveniently applied to the patient than conventional prostheses, enabling an one-day-one-stop dental procedure, thereby reducing burden to patients. The prothesis is useful as a primary crown.

IPC Classes  ?

• A61C 5/77 - Methods or devices for making crowns
• A61K 6/802 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
• A61C 13/265 - Sliding or snap attachments
• A61L 27/10 - Ceramics or glasses
• A61L 27/06 - Titanium or titanium alloys
• A61L 27/14 - Macromolecular materials

Abstract

An artificial tooth includes a prosthesis and an abutment including an insertion part inserted into the prosthesis in one direction and a protruding part protruding from the prosthesis, wherein the insertion part is slantingly formed so that the diameter of the outer peripheral surface of the insertion part increases in the one direction, and the protruding part is slantingly formed so that the diameter of the outer peripheral surface of the protruding part decreases in the one direction, and when the prosthesis is a workpiece structure, one end portion of the protruding part is coupled to an artificial tooth processing device.

IPC Classes  ?

• A61C 8/00 - Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereonDental implantsImplanting tools
• A61C 13/00 - Dental prosthesesMaking same

Abstract

Provided is a machinable abutment-integrated prosthetic block. The machinable abutment-integrated prosthetic block is structured such that an abutment is integrated with a crown block made of a material requiring no heat treatment after undergoing machining processing. The abutment and the crown block are integrated by an adhesive layer containing a cured product of a polymerizable organic compound. Therefore, the prosthetic block which is an integrated form of the abutment and the crown block can be processed by machining processing such as CAD/CAM processing. Therefore, the prosthetic block can be processed, by machining processing, into artificial teeth to be used as temporary teeth or permanent teeth and does not require no additional heat treatment after undergoing the machining processing, thereby shortening a treatment time for implant restoration, resulting in a one-day prosthesis procedure.

IPC Classes  ?

• A61C 8/00 - Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereonDental implantsImplanting tools
• A61C 13/00 - Dental prosthesesMaking same

Abstract

Provided is a dental bulk block made from a glass-ceramic material having a crystalline phase embedded in an amorphous glass matrix. The crystalline phase includes eucryptite and at least one lithium silicate-based crystalline phase selected from the group consisting of lithium metasilicate and lithium disilicate. The dental bulk block is a functionally graded material having a crystalline size gradient with respect to a depth thereof and having no interface at a point of change in main crystalline size gradient value. The bulk block that is heat-treated at 820° C. for 40 minutes exhibits a characteristic peak of a spodumene crystalline phase in an X-ray diffraction analysis result graph unlike the bulk block that is heat-treated at 820° C. for 2 minutes.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• A61K 6/833 - Glass-ceramic composites
• A61K 6/17 - Particle size

Abstract

The present invention relates to a method for manufacturing a glass ceramic substrate and a glass ceramic substrate manufactured thereby, the method comprising a step of manufacturing a predetermined-shaped substrate from a specific bulk glass composition, followed by heat treatment. In the method, the heat treatment step is performed by one method selected from: a) a first heat treatment step performed by a method of raising and maintaining the temperature within a maximum temperature range of 500°C to 650°C (exclusive); b) a second heat treatment step performed by a method of raising and maintaining the temperature within a maximum temperature range of 650°C to 700°C (exclusive); c) a third heat treatment step performed by a method of raising and maintaining the temperature within a maximum temperature range of 700°C to 800°C (exclusive); and d) a fourth heat treatment step performed by a method of raising and maintaining the temperature within a maximum temperature range of 800°C to 870°C, whereby the method is capable of easily manufacturing several types of glass ceramic substrates with various combinations of flexural strength and light transmittance.

IPC Classes  ?

• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
• C03C 3/097 - Glass compositions containing silica with 40% to 90% silica by weight containing phosphorus, niobium or tantalum
• C03B 27/012 - Tempering glass products by heat treatment, e.g. for crystallisationHeat treatment of glass products before tempering by cooling

Abstract

The present invention relates to a dental bulk block comprising, as crystalline phases, at least one lithium silicate-based crystalline phase selected from the group consisting of lithium metasilicate and lithium disilicate, and eucryptite, wherein the dental bulk block is a functionally graded material in which the major crystalline phase has a gradient of particle sizes in a depth direction and which has no interface at a point where the gradient value of the particle sizes of the major crystalline phase changes, and wherein the block, when thermally treated at 820℃ for 40 minutes, shows specific peaks of a spodumene crystalline phase on a graph of X-ray diffraction analysis results, compared with when thermally treated at 820℃ for 2 minutes.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/08 - Artificial teethMaking same
• A61C 13/083 - Porcelain or ceramic teeth
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
• C03C 3/097 - Glass compositions containing silica with 40% to 90% silica by weight containing phosphorus, niobium or tantalum
• C03C 3/083 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound
• C03C 4/00 - Compositions for glass with special properties

Abstract

Dental prosthesis having a structure similar to that of natural teeth and a method for manufacturing the same. Provided is a dental prosthesis capable of expressing a structure and properties similar to natural teeth in which enamel is a surface layer and dentine is an inner layer underneath the enamel. In addition, a method of manufacturing the same dental prosthesis through three-dimensional printing is provided. The dental prosthesis is a cured product including ceramic particles dispersed in a polymer matrix. The cured product includes a first cured product layer including 70% to 90% by weight of ceramic particles having an average particle diameter of 100 to 1,000 nm and a second cured product layer including 40% to 60% by weight of ceramic particles having an average particle diameter of 10 μm to 500 μm, the second cured product layer being adjacent to the inner surface of the first cured product layer.

IPC Classes  ?

• A61C 13/09 - Multilayer teeth
• A61C 13/083 - Porcelain or ceramic teeth
• A61C 13/00 - Dental prosthesesMaking same
• A61K 6/836 - Glass
• A61K 6/889 - Polycarboxylate cementsGlass ionomer cements

Abstract

Disclosed is a bulk block for manufacturing a prosthesis having high aesthetics and processability required for one-day dental prosthetic materials, which is a dental composite bulk block comprising a glass ceramic matrix and a polymer, wherein the glass ceramic matrix consists of an amorphous glass matrix and a crystalline phase dispersed in the glass matrix, the crystalline phase comprises as a main crystalline phase at least one selected from a leucite crystalline phase and a lithium disilicate crystalline phase, and has an average particle diameter of 0.01-1.0 µm, and the polymer is included in an amount of 20-40 wt% with respect to the weight of the total bulk block. The bulk block has the advantages of improved mechanical properties, being capable of preventing microleakage, exhibiting excellent aesthetics, and enabling machining.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/083 - Porcelain or ceramic teeth
• C03C 4/00 - Compositions for glass with special properties
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
• C08L 33/14 - Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur, or oxygen atoms in addition to the carboxy oxygen
• C08L 35/02 - Homopolymers or copolymers of esters
• C08K 3/40 - Glass
• C03B 32/02 - Thermal crystallisation, e.g. for crystallising glass bodies into glass-ceramic articles
• A61K 6/833 - Glass-ceramic composites

Abstract

The present invention discloses a dental bulk block for cutting, the dental bulk block being a glass ceramic block comprising a crystalline phase in an amorphous glass matrix, wherein the main crystalline phase is lithium disilicate, and eucryptite is further included as an additional crystalline phase. The dental bulk block is a gradient functional material which has a gradient of the size of the main crystal phase with respect to depth, and in which no interfaces are present at points at which the gradient value of the main crystal size changes. The dental bulk block is useful for manufacturing an artificial tooth prosthesis that is similar to a natural tooth, the additional crystalline phase of eucryptite makes it easier to mechanically process the dental bulk block compared to when only lithium disilicate is present, and the dental bulk block not only reduces the time it takes to manufacture the artificial tooth prosthesis, but can also bring about the effect of increased structural stability in terms of force distribution due to gradient functionalization of the mechanical properties.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/083 - Porcelain or ceramic teeth
• A61K 6/833 - Glass-ceramic composites
• C03C 4/00 - Compositions for glass with special properties
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
• C03C 3/097 - Glass compositions containing silica with 40% to 90% silica by weight containing phosphorus, niobium or tantalum
• C03C 23/00 - Other surface treatment of glass not in the form of fibres or filaments

Abstract

Provided is a dental bulk block comprising a crystalline phase includes lithium disilicate as a main crystalline phase and eucryptite as a sub-crystalline phase in an amorphous glass matrix that is a functionally graded material having a main crystalline size gradient with respect to the depth thereof, and having no interface at the point of change in the main crystalline size gradient value, and is useful for manufacturing artificial teeth having structural characteristics similar to those of natural teeth, is facile to machine into an artificial tooth prosthesis due to the inclusion of eucryptite as the sub-crystalline phase compared to when only lithium disilicate exists, and can not only shorten the manufacturing time, but also increase the structural stability in terms of force distribution through functional grading of mechanical properties.

IPC Classes  ?

• A61K 6/833 - Glass-ceramic composites
• A61C 5/73 - Composite crowns
• A61C 5/77 - Methods or devices for making crowns

Abstract

A dental bulk block for a CAD/CAM machining process. The dental bulk block is a glass-ceramic block having a crystalline phase embedded in an amorphous glass matrix. The crystalline phase includes lithium disilicate as a main crystalline phase, no sub-crystalline phase exists, and the crystalline phase has a mean grain size of 0.01 to 1.0 μm and a crystallinity degree of 25 to 45%. The dental bulk block can improve machinability during cutting such as CAD/CAM machining in the state of a high-strength workpiece with high flexural strength, thereby reducing a tool resistance and a wear rate, increasing a tool life span, and reducing edge chipping during a machining process. In addition, a dental restoration with desired translucency variations can be manufactured through a simple process of machining a block and altering post-heat treatment conditions, and thus can be realized with various shades.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• C03B 32/02 - Thermal crystallisation, e.g. for crystallising glass bodies into glass-ceramic articles
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
• C03C 4/00 - Compositions for glass with special properties
• A61C 5/77 - Methods or devices for making crowns
• A61C 5/73 - Composite crowns
• A61C 8/00 - Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereonDental implantsImplanting tools

Abstract

Disclosed is a dental bulk block to be cut, the block being a glass ceramic block including a crystalline phase in an amorphous glass matrix, wherein the crystalline phase has a main crystalline phase of lithium disilicate, does not have an additional crystalline phase, has an average particle size of 0.01 ㎛ to 1.0 ㎛, and has a crystallinity of 25% to 45%. Therefore, in a state in which the present invention is a high-strength workpiece having high flexural strength, machinability during cutting processing such as CAD/CAM can be improved, and thus tool resistance and wear rate can be reduced and tool lifespan can be increased, the chipping of an edge portion during machining can be reduced, and dental restorations having different transparencies can be manufactured from the block through simple processes such as mechanical processing of the block and changing of a post heat treatment condition, and thus various shades can be implemented to enable contributions to the simplification of distribution management.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/083 - Porcelain or ceramic teeth
• A61K 6/802 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
• A61K 6/853 - Silicates
• A61L 27/10 - Ceramics or glasses
• C04B 35/653 - Processes involving a melting step
• C04B 35/64 - Burning or sintering processes
• C04B 35/14 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on silica
• C04B 35/01 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides

Abstract

Disclosed in the present invention is a dental bulk block for cutting machining, which is a glass ceramic block including crystalline phases in an amorphous glass matrix, wherein the crystalline phases include a main crystalline phase being lithium disilicate and minor crystalline phases being composed of lithium phosphate and at least one selected from cristobalite and tridymite, and wherein the block is a functionally graded material which has a gradient of crystal sizes in the main crystalline phase with respect to the depth and has no interface at a change point of the gradient value of crystal sizes in the main crystalline phase. The dental bulk block is useful for manufacturing an artificial dental prosthesis similar to a natural tooth, and enables a reduction in the time and process for manufacturing an artificial dental prosthesis as well as an improvement in structural stability in an aspect of force distribution due to functionally graded mechanical properties.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/083 - Porcelain or ceramic teeth
• A61K 6/802 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
• A61K 6/853 - Silicates
• A61L 27/10 - Ceramics or glasses
• C04B 35/622 - Forming processesProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products
• C04B 35/14 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on silica
• C04B 35/01 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides

Abstract

Disclosed is a dental bulk block for machining, which is a glass ceramic block including a crystalline phase in an amorphous glass matrix, the dental bulk block being a functionally graded material including a crystalline phase in which the main crystalline phase is lithium disilicate and the additional crystalline phase comprises at least one selected from cristobalite and tridymite, and quartz and lithium phosphate, and having a main crystalline size gradient with respect to depth and no interface present at the point of change in the main crystalline size gradient. Thus, the dental bulk block is useful for the manufacture of artificial tooth prostheses that are similar to natural teeth, and accordingly, can not only reduce time and processes for manufacturing an artificial tooth prosthesis, but can also provide a structural stability enhancement effect in terms of force distribution due to functionally graded mechanical characteristics.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/083 - Porcelain or ceramic teeth
• A61K 6/802 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
• A61K 6/853 - Silicates
• A61L 27/10 - Ceramics or glasses
• C04B 35/622 - Forming processesProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products
• C04B 35/14 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on silica
• C04B 35/01 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides

Abstract

A crystallized glass includes crystalline and vitreous structures, in which the crystalline structure includes lithium disilicate as a main crystalline phase and at least one crystalline phase among lithium phosphonate (Li3PO4), lithium metasilicate (Li2SiO3), silica (SiO2), and zirconia (ZrO2) as a sub-crystalline phase, has an excellent processability and an excellent plasma corrosion resistance, thereby being useful as a material for production of parts for various dry etching apparatuses.

IPC Classes  ?

• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
• C03C 4/20 - Compositions for glass with special properties for chemical resistant glass
• C03B 32/02 - Thermal crystallisation, e.g. for crystallising glass bodies into glass-ceramic articles
• C03C 19/00 - Surface treatment of glass, not in the form of fibres or filaments, by mechanical means
• H01J 37/32 - Gas-filled discharge tubes

Abstract

3.

IPC Classes  ?

• A61C 5/77 - Methods or devices for making crowns
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
• C03C 8/24 - Fusion seal compositions being frit compositions having non-frit additions, i.e. for use as seals between dissimilar materials, e.g. glass and metalGlass solders
• C03C 3/097 - Glass compositions containing silica with 40% to 90% silica by weight containing phosphorus, niobium or tantalum
• C03C 4/00 - Compositions for glass with special properties
• C04B 37/04 - Joining burned ceramic articles with other burned ceramic articles or other articles by heating with articles made from glass
• C04B 35/14 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on silica
• C04B 35/16 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on silicates other than clay
• C04B 37/00 - Joining burned ceramic articles with other burned ceramic articles or other articles by heating
• A61C 5/73 - Composite crowns
• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/08 - Artificial teethMaking same
• A61C 13/083 - Porcelain or ceramic teeth
• A61C 13/20 - Methods or devices for soldering, casting, moulding or melting
• C03C 27/00 - Joining pieces of glass to pieces of other inorganic materialJoining glass to glass other than by fusing
• A61C 13/30 - Fastening of peg-teeth in the mouthRoot pins

Abstract

The present invention relates to a dental implant, and a manufacturing method for same, the dental implant having a form in which, in order to increase the strength of the connection between a metallic abutment and a tooth prothesis, the abutment and the prothesis are integrally connected, wherein the prothesis and the abutment are integrally connected to one another by means of a molding method.

IPC Classes  ?

• A61C 8/00 - Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereonDental implantsImplanting tools
• B29C 65/70 - Joining of preformed partsApparatus therefor by moulding
• A61C 13/08 - Artificial teethMaking same
• A61C 13/087 - Artificial resin teeth
• B29L 31/00 - Other particular articles

Abstract

Disclosed is a machinable dental bulk block that is a glass ceramic block including an amorphous glass matrix and crystalline phases introduced into the matrix. A major crystalline phase is lithium disilicate and a minor crystalline phase is lithium phosphate. The dental block is made of a functionally gradient material in which the major crystalline phase exhibits a gradient of particle sizes in a depth direction of the dental block and which has no interface at a point where the gradient of particle sizes of the major crystalline phase changes. The dental bulk block is useful for production of a dental prosthesis (artificial tooth) similar to a natural tooth. The dental bulk block can reduce time and the number of processing steps to manufacture a dental prosthesis and provides improved structural stability through good force distribution obtained by functionally graded mechanical properties.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/08 - Artificial teethMaking same
• A61C 13/083 - Porcelain or ceramic teeth
• B28B 11/04 - Apparatus or processes for treating or working the shaped articles for coating
• B28B 11/08 - Apparatus or processes for treating or working the shaped articles for reshaping the surface, e.g. smoothing, roughening, corrugating, making screw-threads
• B28B 11/12 - Apparatus or processes for treating or working the shaped articles for removing parts of the articles by cutting
• C03C 4/00 - Compositions for glass with special properties
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition

Abstract

Disclosed is a dental bulk block for machining, the dental bulk block being a glass ceramic block comprising a crystal phase in an amorphous glass matrix, the crystal phase comprising lithium disilicate as a main crystal phase, and lithium phosphate as an additional crystal phase, and the dental bulk block being a functionally graded material having a main crystal size gradient with respect to the depth thereof, and having no interface present at a point of change in a main crystal size gradient value, and thus the dental bulk block is useful for manufacturing an artificial tooth prosthesis that is similar to a natural tooth, and accordingly, may not only reduce the time and process for manufacturing the artificial tooth prosthesis, but may also enable an effect of increased structural stability in terms of force distribution by means of the gradient functionalization of mechanical properties.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/083 - Porcelain or ceramic teeth
• A61K 6/833 - Glass-ceramic composites
• C03C 4/00 - Compositions for glass with special properties
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
• C03C 3/097 - Glass compositions containing silica with 40% to 90% silica by weight containing phosphorus, niobium or tantalum
• C03C 23/00 - Other surface treatment of glass not in the form of fibres or filaments

Abstract

Disclosed is a machinable dental bulk block that is a glass ceramic block including an amorphous glass matrix and crystalline phases introduced into the matrix. A major crystalline phase is lithium disilicate and minor crystalline phases are lithium phosphate and at least one of spodumene and virgilite. The dental block is made of a functionally gradient material in which the major crystalline phase exhibits a gradient of particle sizes in a depth direction of the dental block and which has no interface at a point where the gradient of particle sizes of the major crystalline phase changes. The dental bulk block is useful for production of a dental prosthesis (artificial tooth) similar to a natural tooth. The dental bulk block can reduce time and the number of processing steps to manufacture a dental prosthesis and provides improved structural stability through good force distribution obtained by functionally graded mechanical properties.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/08 - Artificial teethMaking same
• A61C 13/083 - Porcelain or ceramic teeth
• B28B 11/04 - Apparatus or processes for treating or working the shaped articles for coating
• B28B 11/08 - Apparatus or processes for treating or working the shaped articles for reshaping the surface, e.g. smoothing, roughening, corrugating, making screw-threads
• B28B 11/12 - Apparatus or processes for treating or working the shaped articles for removing parts of the articles by cutting
• C03B 32/02 - Thermal crystallisation, e.g. for crystallising glass bodies into glass-ceramic articles
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition

Abstract

Disclosed is a dental bulk block for cutting, the dental bulk block being a glass ceramic block including a crystalline phase in an amorphous glass matrix, wherein the crystalline phase has lithium disilicate as a main crystalline phase, and has an additional crystalline phase composed of lithium phosphate and at least one selected from among spodumene and virgilite. The dental bulk block is a functionally graded material having a crystalline size gradient with respect to depth, wherein no interface is present at the point of change in the crystalline size gradient. Thus, the dental bulk block is useful for the manufacture of dental prostheses that are similar to natural teeth, and accordingly, can not only reduce the time and processes required for manufacturing dental prostheses, but can also provide the effect of enhanced structural stability from the perspective of force distribution due to the functionally graded mechanical properties.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/083 - Porcelain or ceramic teeth
• A61K 6/833 - Glass-ceramic composites
• C03C 4/00 - Compositions for glass with special properties
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
• C03C 3/097 - Glass compositions containing silica with 40% to 90% silica by weight containing phosphorus, niobium or tantalum
• C03C 23/00 - Other surface treatment of glass not in the form of fibres or filaments

Abstract

The present invention is applied to a dental implant comprising: a fixture fixed in the alveolar bone; an abutment, of which the lower end portion is connected to the fixture; a crown connected to the upper end portion of the abutment; and a screw which is inserted in a hole formed in the crown and is fastened with the fixture, wherein, after the screw is fastened with the fixture while passing through the hole, the present invention is filled in a remaining space in the crown and is formed as a solid-state inlay mold to be inserted in the hole and fill the remaining space.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/225 - Fastening prostheses in the mouth
• A61K 6/836 - Glass

Abstract

A blank for dental purposes according to an embodiment of the present invention comprises: a mounting portion provided on an artificial tooth processing device; and a material portion inserted in the mounting portion, wherein the material portion may include a plurality of outer contact portions which are in contact with the inside of the mounting portion, and may have a polygonal cross-section. The blank for dental purposes according to the present invention can reduce abrasion of a processing tool by forming a tool entrance portion and reducing an entrance load of the processing tool, minimize a dead space of the material portion by processing even the boundary of the material portion, and improve an efficiency of producing dental prosthesis.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same

Abstract

An artificial tooth according to one embodiment of the present invention comprises: a prosthesis; and an abutment including an insertion part inserted into the prosthesis in one direction, and a protruding part protruding from the prosthesis, wherein the insertion part is obliquely formed so that the diameter of the outer peripheral surface thereof becomes larger in one direction, the protruding part is obliquely formed so that the diameter of the outer peripheral surface thereof becomes smaller in one direction, and, if the prosthesis is a workpiece structure, one end portion of the protruding part is coupled to an artificial tooth milling apparatus.

IPC Classes  ?

• A61C 8/00 - Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereonDental implantsImplanting tools
• A61C 13/00 - Dental prosthesesMaking same

Abstract

The present invention relates to a cuttable abutment-integrated prosthetic block. The present invention provides a cuttable abutment-integrated prosthetic block which is a cuttable dental prosthetic block formed by integrating an abutment with a crown block made of a material requiring no heat treatment after cutting, and is integrated through an adhesive layer containing a cured product formed of a polymerizable organic compound and thus can be processed by cutting such as CAD/CAM processing in a state where the abutment is integrated with the crown. Therefore, the prosthetic block can be manufactured into artificial teeth such as temporary teeth or permanent teeth through cutting in the block state while requiring no additional heat treatment after cutting and can shorten a treatment time for implant restoration, thereby enabling a one-day prosthesis procedure.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/08 - Artificial teethMaking same
• A61C 8/00 - Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereonDental implantsImplanting tools

Abstract

The present invention relates to a dental prosthesis having a structure similar to that of natural teeth, and a method for manufacturing same, and disclosed are a dental prosthesis, and a method for manufacturing same by using three dimensional printing, the dental prosthesis comprising: a first cured product layer which is a cured product comprising ceramic particles dispersed in a polymer matrix, and in which the amount of the ceramic particles is 70-90%, the ceramic particles having an average diameter of 100-1,000 nm; and a second cured product layer which is adjacent to the inside of the first cured product layer, and in which the amount of the ceramic particles is 40-60 wt%, the ceramic particles having an average diameter of 10-500 μm, and thus the present invention can present a structure similar to that of natural teeth, that is, a structure and properties similar to those of natural teeth, in which the surface is enamel and the inside is dentin.

IPC Classes  ?

• A61C 13/08 - Artificial teethMaking same
• A61C 13/09 - Multilayer teeth
• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/087 - Artificial resin teeth
• A61C 13/083 - Porcelain or ceramic teeth
• B33Y 70/10 - Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
• B33Y 40/20 - Post-treatment, e.g. curing, coating or polishing

Abstract

Dental composite composition including a glass ceramic and a curable organic material is described in which the glass ceramic includes a crystal phase having an average grain size of 50 to 400 nm, and the dental composite composition is provided as a dental prosthetic material exhibiting superior transparency and mechanical properties comparing to conventional composite products containing micro-sized crystal grains and also has excellent aesthetics and processability required for prosthetic materials for same-day dental prosthetic service.

IPC Classes  ?

• C08F 222/10 - Esters
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
• C08F 222/22 - Esters containing nitrogen
• C08K 9/06 - Ingredients treated with organic substances with silicon-containing compounds
• C08K 3/40 - Glass
• A61K 6/833 - Glass-ceramic composites
• A61K 6/60 - Preparations for dentistry comprising organic or organo-metallic additives
• C03C 17/30 - Surface treatment of glass, e.g. of devitrified glass, not in the form of fibres or filaments, by coating with organic material with silicon-containing compounds

Abstract

3423222), the crystallized glass being a material useful for the manufacture of parts for a dry etching process due to the excellent processability and excellent plasma corrosion resistance thereof.

IPC Classes  ?

• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
• C03C 23/00 - Other surface treatment of glass not in the form of fibres or filaments
• C03C 4/20 - Compositions for glass with special properties for chemical resistant glass

Abstract

Provided is a dental bulk block for grinding processing. The dental bulk block includes a crystalloid, which includes lithium disilicate as a main crystal phase and silicate as a sub-crystal phase, and hyaline as a remainder. The dental bulk block is a functionally gradient material having a crystalline size gradient with respect to a depth thereof and having no interface at a change point of a crystalline size gradient value. The dental bulk block is useful for manufacturing an artificial dental prosthesis that is similar to natural teeth. Accordingly, the time and process for manufacturing the artificial dental prosthesis are shortened, and structural stability is increased in terms of dispersion of force due to gradient functionalization of mechanical properties.

IPC Classes  ?

• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
• C03B 27/012 - Tempering glass products by heat treatment, e.g. for crystallisationHeat treatment of glass products before tempering by cooling
• A61K 6/853 - Silicates
• A61K 6/836 - Glass
• C03B 32/02 - Thermal crystallisation, e.g. for crystallising glass bodies into glass-ceramic articles
• A61K 6/818 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising zirconium oxide
• A61K 6/833 - Glass-ceramic composites
• C03C 3/085 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal

Abstract

Disclosed is a dental bulk block for machining, which is a functionally graded material including: a crystalline phase of which the main crystalline phase is lithium disilicate, and the sub-crystalline phase is silicate; and the remainder of a glass phase, and having a crystalline size gradient with respect to depth, and no interface present at the point of change in the crystalline size gradient. Thus, this is useful for the manufacture of artificial tooth prostheses that are similar to natural teeth, and accordingly, not only can reduce time and processes for manufacturing an artificial tooth prosthesis, but can also provide a structural stability enhancement effect in terms of force distribution due to functionally graded mechanical characteristics.

IPC Classes  ?

• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/083 - Porcelain or ceramic teeth
• A61K 6/831 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising non-metallic elements or compounds thereof, e.g. carbon
• C03C 4/00 - Compositions for glass with special properties
• C03C 3/097 - Glass compositions containing silica with 40% to 90% silica by weight containing phosphorus, niobium or tantalum
• C03C 3/083 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound

Abstract

The present invention provides a dental composite composition comprising glass ceramics and a curable organic material, wherein the glass ceramics, in terms of crystal size, has an average particle size of 50 nm to 400 nm. Disclosed is a dental prosthesis material comprising glass ceramics consisting of nanocrystal particles, which is superior in terms of transparency and mechanical characteristics compared to existing composite products containing micro-sized crystal particles, and also satisfies high aesthetic requirements and processibility required of immediate load prosthesis materials.

IPC Classes  ?

• A61K 6/831 - Preparations for artificial teeth, for filling teeth or for capping teeth comprising non-metallic elements or compounds thereof, e.g. carbon
• A61K 6/60 - Preparations for dentistry comprising organic or organo-metallic additives
• A61K 6/15 - Compositions characterised by their physical properties

Abstract

Provided is a method for preparing a lithium disilicate glass-ceramics containing silicate as a main component, and more particularly, to a method for preparing a glass-ceramics, which is capable of adjusting machinability or translucency according to a crystalline size by using a first heat treatment or a second heat treatment. To this end, a method for preparing a glass-ceramics containing a silica crystalline phase includes: performing a first heat treatment on a glass composition at a temperature of 400 to 850° C., so that a lithium disilicate crystalline phase and a silica crystalline phase each having a size of 5 to 2,000 nm are formed through the first heat treatment. After the first heat treatment, the method further includes performing a second heat treatment at a temperature of 780 to 880° C., so that translucency is adjusted by a temperature of the second heat treatment.

IPC Classes  ?

• C03B 32/02 - Thermal crystallisation, e.g. for crystallising glass bodies into glass-ceramic articles
• C03C 3/097 - Glass compositions containing silica with 40% to 90% silica by weight containing phosphorus, niobium or tantalum
• C03C 4/02 - Compositions for glass with special properties for coloured glass
• C03C 4/00 - Compositions for glass with special properties
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/083 - Porcelain or ceramic teeth

Abstract

The present invention relates to a method for preparing a lithium disilicate glass-ceramics containing silicate as a main component, and more particularly, to a method for preparing a glass-ceramics, which is capable of adjusting machinability or translucency according to a crystalline size by using a first heat treatment or a second heat treatment. To this end, a method for preparing a glass-ceramics containing a silica crystalline phase includes: performing a first heat treatment on a glass composition at a temperature of 400 to 850° C., so that a lithium disilicate crystalline phase and a silica crystalline phase each having a size of 5 to 2,000 nm are formed through the first heat treatment. After the first heat treatment, the method further includes performing a second heat treatment at a temperature of 780 to 880° C., so that translucency is adjusted by a temperature of the second heat treatment.

IPC Classes  ?

• C03B 32/02 - Thermal crystallisation, e.g. for crystallising glass bodies into glass-ceramic articles
• C03C 3/097 - Glass compositions containing silica with 40% to 90% silica by weight containing phosphorus, niobium or tantalum
• C03C 4/02 - Compositions for glass with special properties for coloured glass
• C03C 4/00 - Compositions for glass with special properties
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition

Abstract

The present invention relates to, in manufacturing an artificial tooth by a CAD/CAM processing method using a crystallized glass block which is an artificial tooth material, a method for bonding a high-strength zirconia post capable of acting as a core in a crystallized glass block, a method of bonding a metal link, fastened to an implant fixture, to a zirconia post, and a crystallized glass that can be bonded to the zirconia post and a method for manufacturing the same. To this end, a lithium silicate glass of the present invention comprises 10-15 % by weight of Li2O, 68-76 % by weight of SiO2, 2-5 % by weight of P2O5 serving as a nucleating agent, 0-5 % by weight of Al2O3 for increasing a glass transition temperature and a softening point and enhancing the chemical durability of a glass, 2-3 % by weight of ZrO2, 0.5-3 % by weight of CaO for increasing the coefficient of thermal expansion of a glass, 0.5-5 % by weight of Na2O, and 0.5-5 % by weight of K2O, 1-2 % by weight of colorant and also comprises a glass composition of 0-2.0 % by weight of a mixture of MgO, ZnO, F, and La2O3.

IPC Classes  ?

• A61C 8/00 - Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereonDental implantsImplanting tools
• A61C 13/083 - Porcelain or ceramic teeth
• A61C 19/04 - Measuring instruments specially adapted for dentistry
• C03C 27/04 - Joining glass to metal by means of an interlayer
• C03C 23/00 - Other surface treatment of glass not in the form of fibres or filaments

Abstract

3.

IPC Classes  ?

• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
• A61K 6/00 - Preparations for dentistry
• A61K 6/02 - Use of preparations for artificial teeth, for filling or for capping teeth
• A61K 6/027 - Use of non-metallic elements or compounds thereof, e.g. carbon
• C03C 3/097 - Glass compositions containing silica with 40% to 90% silica by weight containing phosphorus, niobium or tantalum
• C03B 32/02 - Thermal crystallisation, e.g. for crystallising glass bodies into glass-ceramic articles
• C03B 23/20 - Uniting glass pieces by fusing without substantial reshaping
• C03C 4/00 - Compositions for glass with special properties
• C03C 8/24 - Fusion seal compositions being frit compositions having non-frit additions, i.e. for use as seals between dissimilar materials, e.g. glass and metalGlass solders
• C04B 37/00 - Joining burned ceramic articles with other burned ceramic articles or other articles by heating

Abstract

Provided is lithium disilicate crystalline glass containing cristobalite crystal phase for high strength and aesthetic traits and its manufacturing process thereof. Exemplary embodiments of the present invention provide the high strength and aesthetic lithium disilicate crystalline glass, one kind of dental restoration materials, and its manufacturing method which induces the growth of the different crystal phase, cristobalite, from glass with lithium disilicate crystal.

IPC Classes  ?

• C03C 10/04 - Silicate or polysilicate crystalline phase, e.g. mullite, diopside, sphene, plagioclase
• C03B 32/02 - Thermal crystallisation, e.g. for crystallising glass bodies into glass-ceramic articles
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
• C03C 3/097 - Glass compositions containing silica with 40% to 90% silica by weight containing phosphorus, niobium or tantalum
• A61K 6/02 - Use of preparations for artificial teeth, for filling or for capping teeth
• C03B 19/02 - Other methods of shaping glass by casting
• A61K 6/027 - Use of non-metallic elements or compounds thereof, e.g. carbon
• A61K 6/06 - Use of inorganic cements
• A61C 13/08 - Artificial teethMaking same
• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/20 - Methods or devices for soldering, casting, moulding or melting
• C03B 23/20 - Uniting glass pieces by fusing without substantial reshaping
• C03C 19/00 - Surface treatment of glass, not in the form of fibres or filaments, by mechanical means
• A61C 5/77 - Methods or devices for making crowns

Abstract

Provided is lithium disilicate crystalline glass containing cristobalite crystal phase for high strength and aesthetic traits and its manufacturing process thereof. Exemplary embodiments of the present invention provide the high strength and aesthetic lithium disilicate crystalline glass, one kind of dental restoration materials, and its manufacturing method which induces the growth of the different crystal phase, cristobalite, from glass with lithium disilicate crystal.

IPC Classes  ?

• C03C 10/14 - Silica crystalline phase, e.g. stuffed quartz, cristobalite
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
• C03C 3/097 - Glass compositions containing silica with 40% to 90% silica by weight containing phosphorus, niobium or tantalum
• C03B 32/02 - Thermal crystallisation, e.g. for crystallising glass bodies into glass-ceramic articles
• A61C 5/10 - Methods or devices for making crowns
• A61K 6/02 - Use of preparations for artificial teeth, for filling or for capping teeth
• C03B 19/02 - Other methods of shaping glass by casting
• A61K 6/027 - Use of non-metallic elements or compounds thereof, e.g. carbon
• A61K 6/06 - Use of inorganic cements

Abstract

The present invention relates to cristobalite crystal phase-containing lithium disilicate glass ceramics with high strength and aesthetics and a method for preparing the same and, more specifically, to cristobalite crystal phase-containing lithium disilicate glass ceramics with high strength and aesthetics and a method for preparing the same, wherein, in the lithium disilicate-based glass ceramics among artificial tooth materials, cristobalite, which is another different kind of crystal phase, is grown. Thus, the present invention proposes cristobalite crystal phase-containing lithium disilicate glass ceramics, comprising a glass composition containing 11-13 wt% of Li2O, 70.0-77.0 wt% of SiO2, 2-3 wt% of P2O5 which functions as a nucleating agent, 2-5 wt% of Al2O3 which increases the glass transition temperature and the softening point and enhances chemical durability of the glass ceramics, 1-3.0 wt% of ZrO2, and 1-4 wt% of a toning agent.

IPC Classes  ?

• C03C 3/083 - Glass compositions containing silica with 40% to 90% silica by weight containing aluminium oxide or an iron compound
• C03C 3/097 - Glass compositions containing silica with 40% to 90% silica by weight containing phosphorus, niobium or tantalum
• C03B 32/02 - Thermal crystallisation, e.g. for crystallising glass bodies into glass-ceramic articles
• C03B 19/00 - Other methods of shaping glass

Abstract

The present invention relates to a lithium silicate glass or a lithium silicate crystallized glass to be placed on the upper end of zirconia, and a preparation method therefor, and more specifically, to a lithium silicate glass or a lithium silicate crystallized glass with remarkable transmittancy and toning properties to be placed on the upper end of a zirconia substructure, framework or coping having remarkable mechanical strength, and a preparation method therefor. To this end, the lithium silicate crystallized glass or the lithium silicate glass, of the present invention, to be placed on the upper end of a zirconia substructure comprises a glass composition containing: 10-15 wt% of Li2O; 71.1-85.0 wt% of SiO2; 2-5 wt% of P2O5 serving as a nucleating agent; 1-5 wt% of Al2O3 for increasing a glass transition temperature and a softening point and improving the chemical durability of glass; and 0.01-1.0 wt% of ZrO2 for increasing the binding force of the zirconia substructure.

IPC Classes  ?

• C03C 10/12 - Lithium aluminosilicate, e.g. spodumene, eucryptite
• C03C 3/097 - Glass compositions containing silica with 40% to 90% silica by weight containing phosphorus, niobium or tantalum
• C03B 5/16 - Special features of the melting processAuxiliary means specially adapted for glass-melting furnaces
• C03B 27/012 - Tempering glass products by heat treatment, e.g. for crystallisationHeat treatment of glass products before tempering by cooling

Abstract

Exemplary embodiments of the present disclosure provide a lithium silicate crystalline or amorphous glass overlaying the top surfaces of zirconia and the manufacturing process thereof. More specifically, exemplary embodiments of the present disclosure provide a lithium silicate glass or lithium silicate crystalline glass with high light transmittance and good coloring characteristics and the manufacturing process thereof, which overlays the top surface of zirconia with high mechanical strength, frameworks, or copings. 2 which increases the binding strength of the zirconia substructure.

IPC Classes  ?

• C03B 19/02 - Other methods of shaping glass by casting
• C03B 23/00 - Re-forming shaped glass
• C03C 10/00 - Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
• C03B 32/02 - Thermal crystallisation, e.g. for crystallising glass bodies into glass-ceramic articles
• B32B 17/06 - Layered products essentially comprising sheet glass, or fibres of glass, slag or the like comprising glass as the main or only constituent of a layer, next to another layer of a specific substance
• C03B 11/08 - Construction of plunger or mould for making solid articles, e.g. lenses
• C03C 3/097 - Glass compositions containing silica with 40% to 90% silica by weight containing phosphorus, niobium or tantalum
• C03C 4/00 - Compositions for glass with special properties

Abstract

A method of manufacturing a ceramic primary crown including mixing a source material including zirconia or alumina that configures a frame of a primary crown, a polymer for reducing viscosity and applying ductility upon injection molding, and a toner for providing the same or similar color as baby teeth, heating the polymer contained in the mixed source material to have ductility, injection molding the heated source material, extracting the polymer to reduce brittleness and increase ductility with respect to the injection-molded matter, removing fat to completely eliminate the polymer element from the injection-molded matter, from which the polymer is partially extracted through the polymer extraction, sintering the fat-removed body, from which the polymer is removed, to improve mechanical properties, and polishing an outer surface of the sintered body to provide gloss, and performing barrel-finishing to remove a burr.

IPC Classes  ?

• A61C 13/08 - Artificial teethMaking same
• C04B 35/117 - Composites
• A61C 13/083 - Porcelain or ceramic teeth
• C04B 35/488 - Composites
• C04B 35/626 - Preparing or treating the powders individually or as batches
• C04B 35/632 - Organic additives
• C04B 35/634 - Polymers
• C04B 35/638 - Removal thereof
• A61C 13/20 - Methods or devices for soldering, casting, moulding or melting
• B28B 1/24 - Producing shaped articles from the material by injection moulding

Abstract

The present invention is crystallized glass comprising lithium disilicate crystals, and relates to: a high-strength crystallized glass for dental use, which comprises from 5 to 30 wt.% of Li2O and from 60 to 75 wt.% of SiO2 that act as the main constituents in lithium disilicate crystal formation, from 0.01 to 5 wt.% of P2O5 that has the role of a nucleating agent, from 0.1 to 10 wt.% of Al2O3 for increasing the glass transition temperature and softening point and promoting the chemical resistance of the crystallized glass, from 0.01 to 10 wt.% of ZnO for lowering the temperature at which lithium disilicate crystals are generated and for refining the size and promoting the chemical resistance of the crystals that are generated, from 0.1 to 6.5 wt.% of B2O3 for reducing the viscosity during melting for glass formation, lowering the temperature at which lithium disilicate crystals are generated and decreasing the size of the crystals, and from 0.1 to 7 wt.% of an alkali oxide for improving the meltability during melting for glass formation; and a production method therefor. The present invention has a high degree of strength and can be used not only for veneers, inlays and onlays but also for crowns on posterior teeth parts (molars).

IPC Classes  ?

• A61K 6/02 - Use of preparations for artificial teeth, for filling or for capping teeth
• A61K 6/00 - Preparations for dentistry

Abstract

The present invention relates to a preparation method of ceramic crowns for primary teeth comprising the following steps: mixing raw materials comprising zirconia or alumina forming the frame of a crown for primary teeth, a polymer for providing ductility by lowering viscosity in case of injection molding, and a toner for providing a color identical to or similar to that of primary teeth; heating the mixture so as to allow the polymer contained in the mixed raw materials to have ductility; injection molding the heated raw materials; extracting polymers from the injection molded product so as to reduce brittleness and to provide ductility; debinding the injection molded product to completely remove a polymer component from the injection molded product from which some polymers are removed by the polymer extraction; sintering the debinded product from which polymers are removed, to improve mechanical properties; and barreling the sintered body to provide gloss and to remove burr by polishing the outer surface of the sintered body, and ceramic crowns for primary teeth prepared thereby. According to the present invention, the use of zirconia or alumina having high strength and ductility as a raw material provides aesthetic excellence and high biocompatibility, the use of injection molding enables easy preparation and mass production, thereby lowering manufacturing costs, and the low cost enables wide application as crowns for primary teeth for prosthetics for children.

IPC Classes  ?

• A61C 5/08 - Tooth crowns; Making same; Securing crowns in the mouth
• A61C 5/10 - Methods or devices for making crowns
• A61C 13/225 - Fastening prostheses in the mouth
• C04B 35/00 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products