137 results about "Dental enamel" patented technology

A dentifrice composition of the invention can be applied to teeth and/or gums by any conventional A dentifrice composition comprises (a) calcium carbonate having properties of particle size and angularity effective to provide mild abrasivity to dental enamel; (b) red iron oxide of low abrasivity in an effective amount on which to impart red color to the composition; and (c) a herbal component comprising at least one botanical or extract thereof, in a total herbal component amount effective to promote oral health.

A method and apparatus are provided for processing a hard material, for example a hard biological material such as dental enamel or bone, with optical radiation. A treatment zone of the material is selectively cleaned of ablation products and other dirt to enhance processing efficiency, and a tip through which the optical radiation is applied to the treatment zone of the hard material is spaced slightly from the treatment zone during at least a portion of the time that hydrating fluid is being applied to the zone and/or while air or another gas is applied to the zone to clean the surface thereof.

The invention relates to a dental device (1) for dilating the interdental spaces (7, 8). The inventive dental device (1) comprises two interdental matrices (4, 5) for insertion into the interdental spaces (7, 8), two retaining means (2, 3) for the interdental matrices (4, 5) and a spacer device (6, 6', 60, 61, 60b, 61b, 90, 91) for guiding the retaining means (2,3) in parallel and for separating next but one adjacent teeth (111, 112). Unlike conventional wedges, the inventive dental device (1) allows a better access to the mesial and distal tooth surfaces in the area of the interdental spaces (7, 8) and prevents gingival injuries and damages to the dental enamel caused by the pressure. The embodiments relate to interdental matrices (4, 5) with a window (9), embodiments of the retaining means (2, 3) for detachably fixing the interdental matrices (4, 5) and spacer devices with separator screws (6, 6', 60, 61) and guide pins (60b, 61b, 90, 91). The inventive dental device (1) is useful in prophylactic or restorative odontotherapeutical methods.

Tooth whitening composition includes an oxidizing compound and phase transfer catalyst. The phase transfer catalyst may be administrated in the same or in a different composition. The phase transfer catalyst may be incorporated into the tooth whitening composition itself, or it may be included in a composition formulated to contact the enamel surface of a patient prior to the treatment of a treated tooth surface with the oxidizing compound, or both.

The invention relates to nano-sized complexes formed by associating or attaching amorphous calcium phosphate (ACP) and/or amorphous calcium fluoride phosphate (ACFP) with an amphiphilic polymer surfactant (APS) and a bioadhesive polymer. The bioadhesive polymer may serve as a connector or an anchor to attach the nano ACP-APS or ACFP-APS to the tooth surface and to chemically bond the calcium in the enamel to the calcium ions in the nano ACP-APS or ACFP-APS complexes, thus allowing for more controlled release of remineralizing components into the oral cavity. Methods of use of the composition and kits are also disclosed.

A rotating electric machine includes: a stator including a stator core, slots provided in the stator core at equal intervals along the circumferential direction, and coils placed in the stator slots and configured to generate a rotating magnetic field; and a rotor rotatably provided with a predetermined rotation gap between the stator core and the rotor, wherein the rotating electric machine further comprising a first varnish applied between the slots in the stator core and the coils for impregnation, and a second varnish applied directly onto enamel coating of the coils outside of the slots in the axial direction, the first varnish is a thermosetting varnish having a shear bond strength of a flat wire between the coils and the varnish is higher than that of the second varnish, and the second varnish is a thermosetting varnish having a glass transition temperature of approximately 104° C. or lower and the glass transition temperature of the second varnish by the DMA method is lower than that of the first varnish.

The invention relates to silicate material field used in repair and substitution for bone and tooth. Wherein, mixing materials with weight share in alumina ball mill tank; putting into alumina crucible, hot smelting in silicomolybdic bar furnace; pouring fused glass into water for quenching, drying and smashing; remelting the glass powder to cast in graphite mould at 500-700Deg for one hour; cooling to room temperature and obtaining even glass parent body; heating to 800-110Deg for 4-24h to separate controlled glass ceramic contained fluorine bronze mica and fluorapatite. The product has bending strength and elastic modulus fit to mechanical property of bone and teeth of human body, and can generate strong chemical bond with human bone group. This invention is simple and convenient to operate.

Oral compositions containing a polyorganosilsesquioxane particle, preferably polymethylsilsesquioxane particles having a particle size of from about 1 to about 10 microns and an orally-acceptable carrier. Method of using such compositions for the cleaning and polishing of dental enamel, such methods including the step of applying such oral care compositions to the teeth of a user.

The invention relates to a preparation method of flaky nano-hydroxyapatite. The method is characterized by comprising the steps of: dissolving amino-dextran in ultrapure water under 4DEG C to prepare a polysaccharide solution; adding a calcium salt solution into the polysaccharide solution prepared in step (1), slowly heating the solution to 40DEG C, and conducting stirring for 20min; adding a phosphate solution into the mixed solution prepared in step (2) slowly according to a Ca/P ratio of 1.67, and simultaneously adjusting the pH value with sodium hydroxide till the pH value becomes 7 and a white suspension liquid comes into being, keeping the pH value of the current solution at 7.0 for 24h; subjecting the precipitate generated in step (3) to cleaning, centrifugation and drying, thus obtaining flaky nano-hydroxyapatite powder. The flaky nano-hydroxyapatite prepared by the method is applicable to dentin and enamel biomimetic materials. The whole preparation process is simple, the adopted agents are safe and non-toxic, and the biocompatibility is good.

An adhesive resin cement composition having excellent adhesion and physical properties without the application of a priming material or an adhesive when it is bonded to the enamel and aesthetic properties. A photocurable dental enamel adhesive composition comprising (A) a radically polymerizable monomer having an acid group and a structure represented by the following formula (1):

CH₂═CR¹—COO—R²—OCO—R³—COOH   (1)

(R¹ is H or CH₃, and R² and R³ are each independently a divalent inert group essentially composed of C and H), (B) a monofunctional radically polymerizable monomer having a molecular weight of 220 or less and a boiling point of 60° C./10 mmHg or more, (C) a carboxylic ester group-containing aromatic amine, (D) a photopolymerization initiator and (E) a bifunctional radically polymerizable monomer and optionally (F) a filler.

A first aspect of the invention is related to a method for treating a subject's tooth that needs regeneration of dental enamel tissue and/or ameloblast cells. This method includes exposing at least a portion of crown, root canal or periapical tissue of the tooth and administering an enamel material in an amount sufficient to promote the regeneration of dental enamel tissue and/or ameloblast cells such that at least a portion of the exposed crown, root canal or periapical tissue is in contact with the enamel material. The invention is also related to a kits, compositions, and devices which can be used for the purposes of the present invention.

Oral compositions containing a polyorganosilsesquioxane particle, preferably polymethylsilsesquioxane particles, a stannous ion source, and an orally-acceptable carrier. Method of using such compositions for the cleaning and polishing of dental enamel, such methods including the step of applying such oral care compositions to the teeth of a user.

Comparative effectiveness of various oral care products such as dentifrices on preventing dental erosion may be demonstrated using simulated enamel. A substrate is prepared. A mineral layer to simulate dental enamel is nucleated by solution growth on the substrate surface. Alternatively, the mineral layer may be nucleated on a template comprising a self-assembled monolayer formed on a gold layer deposited on the substrate surface. The mineral layer may comprise a homogeneous layer of hydroxyapatite or a thin veneer of hydroxyapatite on a layer of amorphous calcium phosphate. The simulated enamel is then optionally treated with an oral care product and subjected to an acid challenge. The amount of mineral layer remaining after the acid challenge dramatically illustrates the effectiveness or non-effectiveness of the oral care product at preventing dental erosion.

Dental material which contains an antimicrobial active ingredient according to general formula (I),

in which R¹=H, C₁ to C₃ alkylene residue; R²=a linear or branched C₄ to C₂₀ alkylene residue; R³=a C₆ to C₂₀ alkylene residue; and A⁻=Cl⁻, Br⁻, I⁻, F⁻, OH⁻, alkyl and aryl alcoholate, thiolate, NO₃⁻, BO₃³⁻, PO₄³⁻, HPO₄²⁻, H₂PO₄⁻, alkyl and aryl phosphate, alkyl and aryl phosphonate, PF₆⁻, TiF₆²⁻, BF₄⁻, acetylacetonate, β-diketonate or anion of a β-keto ester. The dental material is suitable in particular as tooth filling material, material for inlays or onlays, tooth cement, enamel/dentine adhesive, veneering material for crowns and bridges, or as material for false teeth.

The present invention discloses a health-care toothpaste, which is characterized by comprising, by weight, 2-3% of a balloonflower root extract, 2-3% of eucalyptus oil, 2-3% of immature chebula fruit, 10-15% of sodium phytate, 0.1-0.2% of saccharin sodium, 30-40% of calcium carbonate, 6-10% of sodium bicarbonate, 10-15% of glycerol, 10-20% of sorbitol, 2-4% of sodium lauryl sulfate, 0.5-0.8% of hydroxymethyl cellulose sodium, 0.5-0.8% of potassium nitrate, 0.5-0.7% of carrageenan, 0.5-1% of essence, 0.5-1% of peppermint oil, and the balance of water. The product has functions of whitening and health care, is a specific toothpaste for throat symptoms, has characteristics of antibacterial, anti-inflammation, tooth whitening, dental enamel protection, fragrant and sweet taste and the like, and has an effect of lasting maintaining of clean and fresh mouth.

Disclosed are anti-erosion oral care formulations and methods that provide erosion protection while maintaining adequate cleaning performance. The anti-erosion oral care formulations include a copolymer of a methylvinyl ether and a maleic anhydride and a metal compound or salt that becomes more soluble at acidic pH.

The present invention relates to a new and improved low-concentration formulation of an active enamel substance, such as an enamel matrix, enamel matrix derivative and/or an enamel matrix protein, intended to be used as therapeutic, as prophylactic and/or as cosmetic agent. In the present invention, said active enamel substance is incorporated into a polymeric matrix, which is either suitable for cellular in-growth, or cell-occlusive. The active enamel substance can be incorporated into the polymeric matrix so that it is released by degradation of the polymeric matrix, by enzymatic action and/or by diffusion. Comprised in the invention is thus in particular a new pharmaceutical and/or cosmetic formulation of an active enamel substance at a lower total concentration within the formulation, wherein a spatial and/or selective regulation of release of said active enamel substance permits a greater percentage of the active enamel substance to be released at the time of appropriate cellular activity.

The invention discloses pre-mineralization natural polysaccharide based hydrogel and a preparation method and application thereof. The preparation method comprises the steps of enabling calcium phosphorus salt to dissolve in an acylation natural polysaccharide material aqueous solution, then adding a sulfhydrylation sodium alginate polysaccharide material aqueous solution, performing uniform mixing, adding a beta-sodium glycerophosphate solution, and adjusting pH to 7.0-8.0 so as to obtain the pre-mineralization natural polysaccharide based hydrogel. After the pre-mineralization natural polysaccharide based hydrogel is subjected to freeze drying, dialysis in an alkaline phosphatase solution of which the mass concentration is 1-10% is performed for 12-48h, and freeze drying is performed sothat a hydroxyapatite-contained mineralization natural polysaccharide based hydrogel support material is obtained. The prepared pre-mineralization gel can be subjected to in situ mineralization, and calcium phosphorus salt crystals similar to natural hydroxyapatite in teeth are obtained; besides, the prepared pre-mineralization natural polysaccharide based hydrogel can effectively and uniformly penetrate into the inner parts of canaliculi dentales, so that trouble caused by odonthemodia due to dental caries to patients can be overcome, and damaged dentine and dental enamel structures are repaired.