153 results about "Dental cement" patented technology

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.

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.

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.

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.

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.

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.