Abstract

The present invention relates to a method for manufacturing a zirconia slurry for forming a porous surface on a ceramic implant and crown, and a method for manufacturing an implant using the same. According to the present invention, a predetermined ball mill device is used to obtain a zirconia slurry having a nano-particle size in an improved method compared to existing methods. Also, the zirconia slurry produced by the improved method is applied to a specific object and dried to form a porous surface and thereby actively enhance the bonding force between an abutment and a crown or between a laminate and a tooth of a patient, and maximize the biointegration of an implant itself. Thus, the contact surface between the implant material and bone tissue is improved by enabling bone fiber tissue of the alveolar bone to permeate into the implant and grow. More specifically, the method is characterized by comprising: a zirconia crushing step (S10) for putting zirconia, a foaming agent and an organic binder into a ball mill device, and crushing same while stirring; a carbon powder oxidation step (S20) for heating zirconia powder mixed with the foaming agent to 1200 to 1800°C, oxidizing such that the concentration of carbon powder is 10 to 40 wt%, and forming a porous surface on each particle; and a degreasing process step (S30) for removing the organic binder added to the mixture, while preparing a zirconia solution by adding a dispersing agent and a solvent to the zirconia powder having the porous surface.

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
• 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
• A61K 6/00 - Preparations for dentistry
• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/02 - Bases made by galvanoplastic methodsSurface treatmentEnamellingPerfumingMaking antiseptic
• A61C 13/083 - Porcelain or ceramic teeth

Abstract

The present invention relates to a method for manufacturing a zirconia slurry for forming porous surfaces on an abutment and a crown of a ceramic implant, the method including: the zirconia pulverization step (step S10) of putting zirconia powder, carbon powder as a foaming agent, and an organic binder in a ball mill and agitating and pulverizing the zirconia, carbon powder, and organic binder to allow the mixed zirconia powder to have nanoparticles; the carbon powder oxidization step (step S20) of heating the zirconia powder mixed with the carbon powder to a temperature of 1200 to 1800° C. and oxidizing the carbon powder to a concentration of 10 to 40 wt % to allow the porous surfaces to be formed on every particle of the zirconia powder; and the degreasing step (step S30) of putting a dispersing agent and a solvent in the zirconia powder whose particles have the porous surfaces to make a zirconia solution and removing the organic binder from the zirconia powder.

IPC Classes  ?

• A61C 13/083 - Porcelain or ceramic teeth
• 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
• A61C 13/00 - Dental prosthesesMaking same

Abstract

The present invention relates to an implant surgery drill capable of preventing accidents in advance by actively reinforcing coupling force between a cutting part for cutting the alveolar bone and a connecting part for connecting the cutting part to a handpiece and, more specifically, comprises: a cutting part (10) having a plurality of cutting blades that comprise saw teeth and are aligned in a circular shape so as to perforate the alveolar bone; and a connecting part (20) interposed between the handpiece and the cutting part, wherein, specifically, the cutting part (10) comprises: the saw teeth (11) aligned in a circular shape at the upper end thereof; a cutting upper part (12) extending downward from the saw teeth; a cutting lower part (13) protruding downward from the cutting upper part with an expanded diameter; and a coupling hole (14) recessed from the bottom surface of the cutting lower part so as to induce insertion of the connecting part, the connecting part (20) comprises: a coupling protrusion (21) inserted and interposed in the coupling hole of the cutting part; a stepped part (22) protruding downward from the bottom of the coupling protrusion with an expanded diameter, and restricting the insertion length of the coupling hole; and an extended part (23) extendedly protruding from the bottom surface of the stepped part so as to be connected to the handpiece, and the coupling protrusion (21) further has threads on the outer periphery thereof, and the coupling hole (14) further has threaded grooves corresponding to the threads of the coupling protrusion, so that the coupling protrusion and the coupling hole are fastened to each other by a bolt fastening 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
• A61C 1/08 - Machine parts specially adapted for dentistry
• A61B 17/16 - Instruments for performing osteoclasisDrills or chisels for bonesTrepans

Abstract

There is provided a method of manufacturing a zirconia block for an artificial tooth having a color gradient. The method includes: preparing colored zirconia-based powder and white zirconia-based powder; preparing a plurality of raw materials in which the colored zirconia-based powder and the white zirconia-based powder are mixed in different weight ratios by mixing the colored zirconia-based powder and the white zirconia-based powder while changing a mixing ratio in order to express a desired color gradient; sequentially injecting the plurality of raw materials into a compression mold or a mold frame to mold in increasing or decreasing order of content of the colored zirconia-based powder of the raw material; and calcining a molding result. According to the present invention, it is possible to express aesthetics of a natural tooth by implementing a color gradient of the natural tooth in the zirconia block itself without using porcelain powder or a liquid color set.

IPC Classes  ?

• A61C 5/00 - Filling or capping teeth
• A61C 13/08 - Artificial teethMaking same
• A61L 27/10 - Ceramics or glasses
• A61C 13/083 - Porcelain or ceramic teeth
• A61C 13/00 - Dental prosthesesMaking same
• A61C 13/09 - Multilayer teeth

Abstract

The present invention relates to a method for manufacturing a zirconia block for artificial teeth having color gradations, the method comprising the steps of: preparing colored zirconia-based powder and white zirconia-based powder; mixing the colored zirconia-based powder and the white zirconia-based powder at different mixing ratios so as to obtain desired color gradations, and preparing a plurality of raw materials in which the colored zirconia-based powder and the white zirconia-based powder are mixed with each other at different weight ratios; sequentially injecting the plurality of raw materials into a mold for compression molding or a mold frame in the order of raw materials having a high content of the colored zirconia-based powder or in the order of raw materials having a low content of the colored zirconia-based powder, and molding the injected raw materials; and calcining the molded product. The present invention can implement color gradations of natural teeth in a zirconia block so as to show aesthetics of the natural tooth even without using porcelain powder or a liquid set in a liquid state.

IPC Classes  ?

• A61C 13/20 - Methods or devices for soldering, casting, moulding or melting
• A61C 13/083 - Porcelain or ceramic teeth
• A61L 27/10 - Ceramics or glasses