153 results about "Dental cement" patented technology

A device for use in an endodontic treatment, for example for filling a root canal of a tooth that is empty as a consequence of the removal of the nerve, with a thermoplastic product such as gutta percha, which product is distributed in the root canal by means of heating and pressing. The device includes a housing that can be grasped by hand, a treatment element provided at one end of the housing, and a device for making the treatment element vibrate.

Remineralizing dental cements contain source(s) of calcium and phosphate ions, adhesive resin monomers, reinforcing base resin monomers, and catalysts able to initiate the polymerization of the adhesive and reinforcing base resin monomers. Such dental cements can be used as orthodontic cements, crown and bridge cements, adhesives, sealants, cavity liners, and protective coatings. The release of calcium and phosphate ions and, optionally, fluoride ions, protects tooth structure from demineralization, a precursor of tooth decay.

A method for treating a screw-cement retained prosthesis, an abutment and an implant are disclosed. The method for treating the screw-cement retained prosthesis, which relates to an internal implant, comprises the steps of providing an abutment comprising a joining projection, repositioning the joining projection to a joining groove formed in the upper portion of a fixture, engaging the abutment to the fixture by using a screw, providing a prosthetic appliance including a screw hole, and bonding the prosthetic appliance and the abutment by interposing dental cement between the abutment and the prosthetic appliance. The present invention includes all of the advantages of screw retained prostheses and cement retained prostheses and at the same time can solve the disadvantages thereof. Using a leading inclined surface formed in the joining projection, the abutment and prosthetic appliance are easily separated from and remounted to the fixture.

Disclosed is a novel glass ionomer type dental cement composition comprising a first component comprising an aqueous solution of polymers made from monomers comprising acrylic acid, and a second, preferably substantially anhydrous, component comprising alkaline glass flux in a medium comprising water soluble / miscible monomers or pre-polymers, of such monomers, having at least one —OH group per molecule. The compositions offer more convenient handling, excellent reproducibility of desired properties of the cured material, improved strength, and extended shelf life.

Dental cements containing desensitizing agents, preferably potassium-containing desensitizing agents, are described. The cements favorably provide decreased post-application sensitivity upon application compared to prior art formulations. Methods for preparing these cements are also described, as are methods for decreasing the incidence and the severity of post-application sensitivity using the desensitizing cements of the invention.

An integral, one-piece silanated particle impregnated gutta percha core / cone technique employs a thin layer of a luting agent, such as glass ionomer cement with a machined gutta percha core / cone, precisely matches the preparation, thereby reducing leakage and achieving a hermetic seal. The hermetic seal is further enhanced by a mono-block bond that occurs between the silanated particles in the gutta percha and the appropriate chemical sealant. Optional cryogenic treatment of the gutta percha material changes its molecular weight, making it stiffer and conducive to forming an integral, one piece core / cone, without the need for a separate carrier core to install the tapered gutta percha core / cone within the root canal. Additionally, the tapered body of the core / cone may be reticulated in a slightly three dimensional texturized framework to increase surface area and therefore increase retention. Optional line demarcation indicia are also placed on the core / cone. Additionally, the head of the core / cone can be gripped by a delivery vehicle clasp.

A viscous material dispenser, and dispenser system and kit, can include a dispenser without a dispensing tip and one or a plurality of separate dispensing tips that are removably attachable to the dispenser. The dispenser can be used with many different types of viscous material containing capsules and cartridges, such as those containing composites, dental cements, glass ionomers and the like. In embodiments, the dispenser can incorporate an integral activator for multi-component composition cartridges, such as glass ionomer cartridges.

A gutta-percha point, used as a root canal plugging material in an endodontic treatment, is disclosed. The gutta-percha point has a plurality of engraved or embossed marks as working length marks on its upper portion. Each of the engraved or embossed marks is preferably painted with a distinguishable color along a circumferential surface. The above marks are formed on the point within a marking range while being spaced out at intervals of 1 mm and 2 mm. The marking range starts at a position, spaced apart from the apex of the point by 18 mm, and ends at a position spaced apart from the apex by 24 mm. The gutta-percha point thus allows an endodontist to be free from a repeated marking of working lengths on such points during an endodontic treatment, thus allowing the endodontic treatment to be accomplished within a desired short period of time. Due to the working length marks, the gutta-percha point is precisely inserted into an access cavity of a decayed tooth by a desired depth, thus being free from forming a dead space in the root canal or piercing the apical tissue.

Condensation-crosslinked dental materials based on alkoxysilyl-functional and / or hydroxysilyl-functional polyethers are useful in dentistry for taking tooth impressions, bite registration, denture rebasing, or as temporary and permanent dental cement, temporary closure material, or dental prosthodontic material. The dental material has a composition containing at least one alkoxysilyl-functional and / or hydroxysilyl-functional polyether a), at least one catalyst b), and optionally water c) and at least one acidic compound d) that has a water solubility (20° C.) of no more than 150 g / l.

A dental, paste / paste self-adhesive cement includes a polymerizable acidic monomer or monomer mixtures; a polymerizable non-acidic monomer or monomer mixtures, a photo-initiator and / or a co-initiator, a reducing agent such as a benzoylthiourea and other substituted benzoylthiourea, an oxidizing agent, a thermal stabilizer and a glass filler.

Improved compositions comprising a mixture of gutta-percha and a hydraulic material containing calcium silicate, calcium aluminate, calcium phosphate, and calcium sulfate compounds are provided. Preferably, the composition includes hydroxylapatite mineral. The composition is particularly suitable for obturating and sealing dental root canals. The composition should provide a stable barrier to bacterial and fluid leakage in the root canal system of a tooth. In addition, the composition should help promote the growth of new bone and tissue surrounding the root tip area.

A dental cement composition comprising(i) a particulate reactive inorganic filler capable of leaching metal ions in the presence of an acid, and(ii) composite particles with grafted polyacidic polymer chains, which are obtainable by a process comprising the following steps:(a) polymerizing one or more free radically polymerizable monomers containing optionally protected acidic groups in the presence of(a1) an initiatior system comprising initiator particles displaying a moiety comprising a radically transferable atom or group as a polymerization initiation site; and(a2) a catalyst facilitating controlledliving polymerisation, and(a3) optionally further polymerizable monomers, for forming a composite particle with grafted optionally protected polyacidic polymer chains; and(b) optionally deprotecting protected acidic groups, for forming composite particles with grafted polyacidic polymer chains.

A white, substantially non-iron containing dental material formed from Portland cement. The material may be a dental cement, dental restorative or the like.

A self-etching, dental cement composition is provided having the advantage of not requiring a separate etching and bonding step.

One embodiment of the invention provides a dental cement composition which includes (a) an acid group-having polymerizable monomer, (b) a polyalkenoic acid, (c) an ion-leachable glass filler, (d) a polymerizable monomer not having an acid group, (e) water, (f) a peroxide, (g) a salt of an aromatic sulfinic acid, and (h) an aromatic secondary amine and / or an aromatic tertiary amine.

An integral, one-piece gutta percha core / cone technique employs a thin layer of a luting agent, such as glass ionomer cement with a machined gutta percha core / cone, precisely matches the preparation, thereby reducing leakage and achieving a hermetic seal. Optional cryogenic treatment of the gutta percha material changes its molecular weight, making it stiffer and conducive to forming an integral, one piece core / cone, without the need for a separate carrier core to install the tapered gutta percha core / cone within the root canal. Additionally, the tapered body of the core / cone may be reticulated in a slightly three dimensional texturized framework to increase surface area and therefore increase retention. Optional line demarcation indicia are also placed on the core / cone. Additionally, the head of the core / cone can be gripped by a delivery vehicle clasp.

A process for the modification of a particulate reactive filler for a dental ionomer cement, comprising (a) providing a particulate reactive filler; and (b1) treating the surface of the particulate reactive filler with a surface modifying agent for obtaining a surface modified particulate reactive filler displaying ligand groups for a transition metal; and (b2) treating the surface modified particulate reactive filler with an agent containing the transition metal for complexing the transition metal with the ligand groups displayed on the surface of the surface modified particulate reactive filler; and / or (c) treating the surface of the particulate reactive filler with a surface modifying transition metal complex which is a reaction product of a surface modifying agent and a transition metal precursor compound, for obtaining a transition metal complex surface modified particulate reactive filler for a dental ionomer cement.

Dental cements containing desensitizing agents, preferably potassium-containing desensitizing agents, are described. The cements favorably provide decreased post-application sensitivity upon application compared to prior art formulations. Methods for preparing these cements are also described, as are methods for decreasing the incidence and the severity of post-application sensitivity using the desensitizing cements of the invention.

The invention discloses a preparation method of root canal filling materials, which comprises the steps that: (1) the mixture composed of thermoplastic copolymerization-modified polymer or / and grafted modified polymer and inorganic filler treated with surface modification as well as compounds which have resisting function to X-ray is evenly blended by adopting a kneader; and (2) the mixture is mixed for 5 minutes to 40 minutes in melting state with the temperature of 140 DEG C to 250 DEG C, then the root canal filling materials of the invention are prepared; the root canal filling materials prepared by the method has the advantage of not only excellent stability of gutta-percha filling materials, but also excellent cohesiveness of Resilon resin filling materials; the defects of poor adhesive bonding performance of the gutta-percha filling materials and easy degradation of the Resilon resin filling materials which are used in current clinics can be overcome; and compared with the gutta-percha filling materials and the Resilon resin filling materials, the stability and the cohesiveness are greatly improved.

The present invention provides a composition comprising: at least one viscosity-enhancing agent; and at least one macromonomer. In particular, the composition may be a bone cement composition and / or a dental cement composition. The composition may be used in medicine. The composition may be used in orthopedic and / or periodontal applications. The present invention also provides uses of the composition.

A fluoride treated medical implant, such as a dental component, is provided, the medical implant comprising fluorinated metal oxide on the substrate surface. A method for the preparation of such treated implants is also provided, the method involving exposure of the medical implant to a fluorine-containing reagent. A dental structure is also provided, which includes a first dental component comprising a fluorinated metal oxide layer on its surface, a silane coupling agent, a dental cement, and a second dental component having a surface bonded to the dental cement. An additional dental structure, which includes a first dental component comprising a fluorinated metal oxide layer on its surface, a dental cement, and a second dental component having a surface bonded to the dental cement is also provided.

Remineralizing dental cements contain source(s) of calcium and phosphate ions, adhesive resin monomers, reinforcing base resin monomers, and catalysts able to initiate the polymerization of the adhesive and reinforcing base resin monomers. Such dental cements can be used as orthodontic cements, crown and bridge cements, adhesives, sealants, cavity liners, and protective coatings. The release of calcium and phosphate ions and, optionally, fluoride ions, protects tooth structure from demineralization, a precursor of tooth decay.

An integral, one-piece silanated particle impregnated gutta percha core / cone technique employs a thin layer of a luting agent, such as glass ionomer cement with a machined gutta percha core / cone, precisely matches the preparation, thereby reducing leakage and achieving a hermetic seal. The hermetic seal is further enhanced by a mono-block bond that occurs between the silanated particles in the gutta percha and the appropriate chemical sealant. Optional cryogenic treatment of the gutta percha material changes its molecular weight, making it stiffer and conducive to forming an integral, one piece core / cone, without the need for a separate carrier core to install the tapered gutta percha core / cone within the root canal. Additionally, the tapered body of the core / cone may be reticulated in a slightly three dimensional texturized framework to increase surface area and therefore increase retention. Optional line demarcation indicia are also placed on the core / cone. Additionally, the head of the core / cone can be gripped by a delivery vehicle clasp.

An integral, one-piece silanated particle impregnated gutta percha core / cone technique employs a thin layer of a luting agent, such as glass ionomer cement with a machined gutta percha core / cone, precisely matches the preparation, thereby reducing leakage and achieving a hermetic seal. The hermetic seal is further enhanced by a mono-block bond that occurs between the silanated particles in the gutta percha and the appropriate chemical sealant. Optional cryogenic treatment of the gutta percha material changes its molecular weight, making it stiffer and conducive to forming an integral, one piece core / cone, without the need for a separate carrier core to install the tapered gutta percha core / cone within the root canal. Additionally, the tapered body of the core / cone may be reticulated in a slightly three dimensional texturized framework to increase surface area and therefore increase retention. Optional line demarcation indicia are also placed on the core / cone. Additionally, the head of the core / cone can be gripped by a delivery vehicle clasp.

An endodontic post comprising a combined endodontic post and filling material tip in a single unit. To use the post unit, the device is placed in an oven or heater to heat and soften the thermoplastic material. The device will then be placed in a root canal that has been opened to a predetermined dimension by use of endodontic files, to seal the apical end. If necessary, the gutta percha can be compacted toward the apex, while it is still in the softened state, to ensure the apex is adequately sealed. The post is then cemented into place by lining the canal walls with a bonding agent and filling the interface between the post and the walls of the canal with a dual cure resin cement. This will result in a coronal seal of the canal via resin restorative material and an apical seal of the canal by means of gutta percha and sealant. The remaining portion of the post, extending supra-gingivally, will be used to build a core around it. Any excess will be cut off. One length of the device will be longer to accommodate the longer roots in anterior teeth. Another length will be shorter to accommodate smaller roots in the molar region.

The invention provides a manufacturing method of a root canal filling tip, and belongs to the field of medical equipment. The manufacturing method of the root canal filling tip comprises the following steps: step 1, selecting a medical vanadium-free nickel-free titanium alloy wire as a raw material; step 2, processing a first end of the vanadium-free nickel-free titanium alloy wire into a cone to form a closed section; step 3, processing a filling section from a thick end of the closed section on the vanadium-free nickel-free titanium alloy wire; step 4, cutting into a plurality of scale lines from one end of the filling section on the vanadium-free nickel-free titanium alloy wire to form a depth measuring section; and step 5, manufacturing a mould with a mould cavity, putting the filling section in the center of the mould cavity of the mould, and injecting heated gutta-percha into the mould cavity to enable the gutta-percha to uniformly wrap the periphery of the filling section. The root canal filling tip manufactured by the manufacturing method provided by the invention adopts the vanadium-free nickel-free titanium alloy wire as the raw material, has high biocompatibility and is safe to use; and the root canal filling tip adopts an integrally formed structure, avoids welding and prevents harmful substances in a welding flux from permeating a human body.

A dental composition comprising a polymerizable monomer (1), initiator, filler component(s) in an amount of more than about 20 wt.-%, wt.-% with respect to the whole weight of the composition, the polymerizable monomer (1) being characterized as follows: having exactly two (meth)acrylate reactive moieties, having an unsymmetrical backbone as linkage between the (meth)acrylate reactive moieties, the two (meth)acrylate reactive moieties being attached onto the unsymmetrical monomer backbone as alkyl esters, the unsymmetrical backbone comprising one aromatic moiety of the phenolic type, the polymerizable monomer (1) not containing an acidic moiety, other atoms than carbon, hydrogen, nitrogen, and oxygen, a bisphenol moiety. The invention is also directed to the use of the dental composition as or for producing a dental filling material, dental cement, crown and bridge material, inlay, onlay, veneer, orthodontic device or dental mill blank

The invention pertains to antimicrobial dental care materials. In particular, the invention pertains to antimicrobial dental care materials containing biocidal complexes, e.g.: a) a mouthwash containing said complex; b) a dentifrice containing said complex; c) a dental floss coated and / or impregnated with said complex; and d) a protective coating for teeth containing said complex, e) toothbrush bristles coated and / or impregnated with said complex; f) an orthodontic appliance coated and / or impregnated with said complex; g) an orthodontic appliance adhesive containing said complex; h) a denture appliance coated and / or impregnated with said complex; I) a denture appliance adhesive containing said complex; j) an endodontic composition coated and / or impregnated with said complex; k) a composite-type dental restorative composition containing said complex; l) a dental cement containing said complex; m) a dental liner containing said complex; n) a dental bonding agent containing said complex; The complex will have a maximum water solubility of about 5 wt. % and is further characterized as being a complex that is formed by a metathesis reaction between a biocidal cationic monomer or polymer with a biocidal anionic monomer or polymer or by an acid-base reaction between a biocidal monomeric or polymeric free base and a biocidal monomeric or polymeric acid capable of protonating the free base.

The present invention provides a dental cement that exhibits excellent adhesiveness to dentin and has high mechanical strength. The present invention relates to a multi-part dental cement containing: an asymmetric acrylamide-methacrylic acid ester compound (a); an acid group-containing (meth)acrylic polymerizable monomer (b); a hydrophobic crosslinkable polymerizable monomer (c); a chemical polymerization initiator (d); and a filler (e). The asymmetric acrylamide-methacrylic acid ester compound (a) is represented by the following general formula (1):where X is an optionally substituted, linear or branched C1 to C6 aliphatic group or an optionally substituted aromatic group, the aliphatic group is optionally interrupted by at least one linking group selected from the group consisting of —O—, —S—, —CO—, —CO—O—, —O—CO—, —NR1—, —CO—NR1—, —NR1—CO—, —CO—O—NR1—, —O—CO—NR1—, and —NR1—CO—NR1—, and R1 is a hydrogen atom or an optionally substituted, linear or branched C1 to C6 aliphatic group.