Herein disclosed is a material comprising: a premixed paste, comprising: one or more barium cements that are capable of a hydration reaction with water to form a hydrogel; and a nonaqueous liquid carrier that is hydrophilic and able to undergo an exchange with a water-based liquid when the premixed paste is exposed to an environment where water-based liquids are present. Uses of the herein disclosed material are also disclosed.
C04B 28/02 - Compositions pour mortiers, béton ou pierre artificielle, contenant des liants inorganiques ou contenant le produit de réaction d'un liant inorganique et d'un liant organique, p. ex. contenant des ciments de polycarboxylates contenant des ciments hydrauliques autres que ceux de sulfate de calcium
A61K 6/849 - Préparations pour la fabrication de dents artificielles, l’obturation ou le recouvrage des dents comprenant des ciments inorganiques
Herein disclosed is a material comprising: a premixed paste, comprising: one or more barium cements that are capable of a hydration reaction with water to form a hydrogel; and a nonaqueous liquid carrier that is hydrophilic and able to undergo an exchange with a water-based liquid when the premixed paste is exposed to an environment where water-based liquids are present. Uses of the herein disclosed material are also disclosed.
Disclosed is a method of making an endodontic body in which a filling material blank comprising filling material suitable for endodontic applications is provided, a mold system defining at least one mold cavity is provided, where at least a portion of the mold cavity is in the shape of the endodontic body, the filling material blank is arranged adjacent to the at least one mold cavity, heat is applied to the filling material blank such that the filling material blank is deformable; and pressure is applied to the heated filling material blank such that at least a portion of the heated material blank flows into the at least one mold cavity.
Disclosed is a method of making an endodontic body in which a filling material blank comprising filling material suitable for endodontic applications is provided, a mold system defining at least one mold cavity is provided, where at least a portion of the mold cavity is in the shape of the endodontic body, the filling material blank is arranged adjacent to the at least one mold cavity, heat is applied to the filling material blank such that the filling material blank is deformable; and pressure is applied to the heated filling material blank such that at least a portion of the heated material blank flows into the at least one mold cavity.
A61C 5/50 - Instruments pour obturer les canaux radiculairesProcédés ou instruments pour le traitement du canal du nerf de la dent
A61C 5/55 - Instruments pour obturer les canaux radiculairesProcédés ou instruments pour le traitement du canal du nerf de la dent avec des moyens de chauffage, p. ex. pour chauffer la gutta-percha
An endodontic handpiece comprises a handle assembly and an endodontic tool. The handle assembly comprises a handle housing, a chuck assembly, a bearing system for supporting the chuck assembly for rotation relative to the handle housing, a first drive system for rotating the chuck assembly, and first and second drive systems. The endodontic tool defines a support portion and a working portion. The chuck assembly transfers movement of the chuck assembly to the endodontic tool. The endodontic handpiece operates in at least one of first, second, and third modes in which the first drive system causes rotation of the endodontic tool through the chuck assembly, the second drive system causes vibration of the endodontic tool, and/or the first drive system causes rotation of the endodontic tool through the chuck assembly.
A61C 1/07 - Machines dentaires à forer ou couper caractérisées par l'entraînement des outils dentaires à commande vibratoire, p. ex. ultrasonique
A61C 1/08 - Éléments de machines spécialement adaptés à la chirurgie dentaire
A61C 3/02 - Instruments à forer ou couperInstruments agissant à la façon d'une décapeuse au jet de sable
A61C 5/40 - Instruments pour le traitement chirurgical des racines ou des nerfs dentairesAiguilles pour retirer le nerfProcédés ou instruments pour le traitement des racines
An endodontic handpiece comprises a handle assembly and an endodontic tool. The handle assembly comprises a handle housing, a chuck assembly, a bearing system for supporting the chuck assembly for rotation relative to the handle housing, a first drive system for rotating the chuck assembly, and first and second drive systems. The endodontic tool defines a support portion and a working portion. The chuck assembly transfers movement of the chuck assembly to the endodontic tool. The endodontic handpiece operates in at least one of first, second, and third modes in which the first drive system causes rotation of the endodontic tool through the chuck assembly, the second drive system causes vibration of the endodontic tool, and/or the first drive system causes rotation of the endodontic tool through the chuck assembly.
A handle system for supporting a tool defining a tool axis during the performance of dental procedures comprises a handle defining a handle axis, a rotation sleeve, a head assembly and a gear set comprising first and second gear portions. The rotation sleeve supports the first gear portion. The head assembly supports the second gear portion. The handle supports the rotation sleeve for rotation relative to the handle. The handle supports the head assembly such that the first gear portion engages the second gear portion. With the head assembly supported by the handle, the head assembly engages the tool to support the tool such that the tool axis extends at a first angle relative to the handle axis and rotation of the rotation sleeve relative to the handle causes axial rotation of the tool about the tool axis.
A hydraulic cement comprising a calcium silicate and at least one phosphate compound. The phosphate compound is included in an amount sufficient to react a major portion of the calcium hydroxide that is produced during hydration of the cement to hydroxyapatite or other calcium phosphates. The phosphate compound is preferably a mono-calcium phosphate. The cement is useful in both bio-medical/dental and engineering applications. The calcium hydroxide is reacted by the phosphate to form hydroxiapatite or other calcium phosphate that is co-precipitated with the calcium silicate hydrate to form a composite-like structure on a nano-scale level. The reduced calcium hydroxide content in the set cement increases its strength and reduces its pH. The hydroxiapatite content and the reduced pH render the cement bio-active and suitable for use in medical and dental implants, for example, for replacement bone and tooth material. Due to its high strength, the cement may also be used for structural/engineering applications.
C04B 24/00 - Emploi de matières organiques en tant qu'ingrédients actifs pour mortiers, béton ou pierre artificielle, p. ex. emploi de plastifiants
C04B 28/02 - Compositions pour mortiers, béton ou pierre artificielle, contenant des liants inorganiques ou contenant le produit de réaction d'un liant inorganique et d'un liant organique, p. ex. contenant des ciments de polycarboxylates contenant des ciments hydrauliques autres que ceux de sulfate de calcium
C04B 28/34 - Compositions pour mortiers, béton ou pierre artificielle, contenant des liants inorganiques ou contenant le produit de réaction d'un liant inorganique et d'un liant organique, p. ex. contenant des ciments de polycarboxylates contenant des liants phosphate froids
9.
PREMIXED BIOLOGICAL HYDRAULIC CEMENT PASTE COMPOSITION AND USING THE SAME
A premixed cement paste for use in medical or dental applications. The premixed cement paste remains fluid when stored in a hermetically sealed condition, but hydrates and hardens to set when placed in a physiological environment. The cement paste includes at least one calcium silicate compound and at least one substantially water-free liquid carrier mixed with the at least one calcium silicate compound; the substantially water-free liquid carrier avoids hydration of the mixture during storage, but undergoes exchange with aqueous physiological solutions so that the cement past hydrates and hardens to set when placed m a physiological environment. The paste may be placed in the physiological environment by injection, for example. The at least one calcium silicate compound may be, for example, calcium silicate, dicalcium silicate, tricalcium silicate, or mixtures thereof. The substantially water-free liquid may be, for example, ethylene glycol, polyethylene glycol, liquid glycerol, glycerin, ethyl alcohol, vegetable oil, animal oil, silicon oil, hydroxypropyl methylcellulose, or mixtures thereof. The substantially water- free liquid earner preferably includes water in an amount less than about 20% by weight percent of the pate. The paste may include a secondary phase for enhanced properties, such as, for example, a fibrous of particular for enhanced mechanical properties, biodegradable or soluble materials that provide room for bone in growth, bioactive materials such as antibiotics that dilute into the physiological environment from the set cement, and radio-opaque materials that enhance X-ray imaging of the cement.
A hydraulic cement for biomedical applications. The cement sets in-situ, hardening when exposed to water to produce nano-dispersed composite of calcium-silicate-hydrate gel mixed with hydroxyapatite. In comparison with prior cements, the composition provides high biocompatibility, high bioactivity and high biomechanical strength, due to the composite structure of the calcium silicate hydrate reinforced with co-precipitated particles of hydroxyapatite. Biocompatibility is also increased due to an absence of aluminum and magnesium in the composition. The cement is suitable for variety of applications, including dental implants, bone fixation, and bone repair.
A hydraulic cement comprising a calcium silicate and at least one phosphate compound. The phosphate compound is included in an amount sufficient to react a major portion of the calcium hydroxide that is produced during hydration of the cement to hydroxyapatite or other calcium phosphates. The phosphate compound is preferably a mono-calcium phosphate. The cement is useful in both bio-medical/dental and engineering applications. The calcium hydroxide is reacted by the phosphate to form hydroxiapatite or other calcium phosphate that is co-precipitated with the calcium silicate hydrate to form a composite-like structure on a nano-scale level. The reduced calcium hydroxide content in the set cement increases its strength and reduces its pH. The hydroxiapatite content and the reduced pH render the cement bio-active and suitable for use in medical and dental implants, for example, for replacement bone and tooth material. Due to its high strength, the cement may also be used for structural/engineering applications.
C04B 28/02 - Compositions pour mortiers, béton ou pierre artificielle, contenant des liants inorganiques ou contenant le produit de réaction d'un liant inorganique et d'un liant organique, p. ex. contenant des ciments de polycarboxylates contenant des ciments hydrauliques autres que ceux de sulfate de calcium
