87 results about "Dental fillings" patented technology

A dental contact matrix system is described for the placement of dental fillings. The dental contact matrix system includes a matrix, a retainer for placing and retaining the 5 matrix and an elastic wedge. The retainer includes two lugs or tines that fit between two teeth on the buccal and lingual sides of the teeth. The lugs are connected by spring member that presses the lugs against the lingual and buccal sides of the teeth. There is an adaptation to hold the elastic wedge in a stretched condition between the lugs.

The invention discloses a use of a gel material in a therapeutic process (a dental filling process) of a dental disease. The use is characterized in that the gel material is applied to cavity preparation in the therapeutic process of the dental disease and then used for temporarily sealing in the therapeutic process of the dental disease, wherein the gel material is selected from temperature-sensitive type hydrogel or solvent-sensitive type gel; the phase transition temperature of the temperature-sensitive type hydrogel is 25 DEG C to 36 DEG C, i.e., when the temperature is lower than the phase transition temperature, the gel material is in a liquid state, and when the temperature is higher than the phase transition temperature, the gel material is in a solid state; the solvent-sensitive gel is insoluble in water, and freely soluble in other solvents; and the solvent-sensitive gel is in the liquid state in a process of dissolving in the solvents, the solvent-sensitive gel is in the solid state after the solvents are reduced.

The interproximal composite carver is a dental instrument configured to carve composite material used in dental fillings from the interproximal surfaces of a tooth. The instrument has an elongated handle with a curved blade attached to each of its two ends. The cutting edge of one of the blades is oriented to carve along the left side of a tooth when the blade is inserted into a patient's mouth, and the cutting edge of the other blade is oriented to carve along the right side a tooth when inserted into a patient's mouth. With the cutting edges oriented in opposite directions, the instrument can be used in an ergonomic manner on either side of a given tooth by simply changing which end of the instrument is inserted into the patient's mouth.

The invention discloses a dental filling composite resin using a silicon dioxide nano-fiber as a filler. The resin is prepared from the following raw materials in percentage by mass: 18-22 percent of bisphenol A-glycidyl methacrylate, 4-16 percent of triethylene glycol dimethacrylate, 0.5-1 percent of camphorquinone, 0.5-1 percent of ethyl 4-N,N-dimethylaminobenzoate and 60-75 percent of silicon dioxide nano-fiber. The preparation process is simple and easy to operate, the raw materials are easily available at relatively low price, and the prepared composite resin has excellent physical mechanical performance, good abrasion resistance and long service life, has the characteristics of light color, low polymerization shrinkage and the like, and is expected to be used in clinical application.

Hygiene instrument for removing stains, cleaning and polishing the surface of the teeth and the composite materials of dental fillings.The structure of the hygiene instrument is made up of fibers and optionally a load of particles embedded in a resinous matrix giving the working surface of the hygiene instrument a continuous abrasive power.

Provided is a dental filling / restoration kit, in which a pretreatment material and a filling / restoring material can be cured by only one irradiation with light, which enables further improved adhesion between a tooth and the filling / restoring material, which prevents the filling / restoring material from being easily colored, to thereby exhibit its excellent sensuousness. Specifically provided is a dental filling / restoration kit which includes: a filling / restoring material (A) containing 100 parts by mass of a radical-polymerizable monomer (a) containing 3 to 30 parts by mass of a water-soluble radical-polymerizable monomer having no acidic group (a1), a photopolymerization initiator (b), and a filler (c), the filler (c) being contained in an amount of 80 to 2,000 parts by mass relative to 100 parts by mass of the radical-polymerizable monomer (a); and a pretreatment material (B) containing a radical-polymerizable monomer having an acidic group (d) and water (e).

The invention relates to highly charged cationic dental compositions, comprising at least one compound (A) which may undergo cationic reactions, at least one dental filling (B), optionally at least one dispersant (C), comprising at least one organic polymer or copolymer, at least one cationic photocuring agent and optionally at least one photosensitizer (E), said composition being characterised in that at least one dental filling (B) is treated by a) at least one organosilicon coupling agent (F) and b) at least one compound (G), said organosilicon coupling agent (F), comprising at least one reactive function (frA) directly bonded to a silicon atom forming a chemical bond to the dental filling after activcation and at least one reactive function (frB) indirectly bonded to a silicon atom forming a chemical bond to a reactive function (frC) of the compound (G).

The invention provides a low-elastic-modulus beta type titanium alloy for dental filling. The low-elastic-modulus beta type titanium alloy is characterized by being prepared from alloy components according to the weight percent: 23 to 24 percent of Mo, 12 to 13 percent of Nb, 2.5 to 2.8 percent of Zr, 2.1 to 2.2 percent of Al, 1.1 to 1.7 percent of Cr, 0.5 to 0.6 percent of Ag, 0.2 to 0.3 percentof Fe, 0.4 to 0.7 percent of Ta, 0.15 to 0.2 percent of Cu, 0.3 to 0.45 percent of Hf, 0.2 to 0.4 percent of Sn, 0.05 to 0.08 percent of Er, less than or equal to 0.05 percent of O, less than or equalto 0.01 percent of H, less than or equal to 0.02 percent of C, less than or equal to 0.01 percent of N and the balance of Ti and unavoidable impurities; the beta type titanium alloy formed by heat treatment has the average crystallization grain diameter of 20 to 40mu m, the yield strength of 900 to 1000MPa, the tensile strength of 1020 to 1150MPa, the elongation percentage of 15 to 17 percent, the Young's modulus of 40 to 60GPa, the primary alpha-phase volume percent of 22 to 25 percent, the size of 2 to 3 microns and the secondary alpha-phase volume percent of 22 to 25 percent.

Epoxy-based root canal dental compositions and root canal sealing dental filling systems including an epoxy-based root canal dental composition are described. The dental compositions include an epoxy polymer comprising a plurality of amide monomers, a plurality of diepoxide monomers and at least one fumed silica. In a preferred embodiment, the dental composition contains substantially no silicone or mineral oil.

A dental tool for use in photo-cured filling processes. The dental tool includes a tool tip formed from a material that allows the transmission of ultraviolet and visible light wavelengths through the tool tip without significant distortion or reflection. The material is also relatively high strength so not to shatter or break during use. The fill material will also not easily adhere to the tool. The material of a preferred embodiment is sapphire. The tool is able to continue to compact and shape the fill material while the composite polymer fill material is undergoing photo-curing. The light beam used for photo-curing is able to safely pass through the tool without the risk of damage to the surrounding tissue from reflection or distortion of the light beam.

The visible light hardened filling composite material for dental filling and its preparation process belongs to the field of dental repair material making technology. The composite material is prepared through mixing polymerisable dimethylacrlyate resin comprising dimethylacrlyate pre-polymer and active dimethylacrlyate diluent, visible light initiator cyclic pepper compound or its derivative, and inorganic filler of quartz and / or glass, and irradiation with visible light. The composite material has the features of high initiating efficiency, high mechanical performance, good use performance, low toxicity and good biocompatibility.

A dental filling composition includes zirconia powder, a hydraulic inorganic binding agent, a slightly acidic hardening controller agent and a pozzolan component with respect to the gross weight of the composition. The dental filling composition includes 45% to 85% of zirconia powder with respect to the gross weight of the composition, and includes a minimum quantity of inorganic binding agent, thus exhibiting excellent radio opacity and hardly comprising heavy metals. Therefore, the dental filling composition of the present invention is excellent in biocompatibility, and therefore, can be safely and widely used in various dental filling operations.

Provided is a curable composition including a polymerizable monomer component (A), a spherical filler (B) having an average particle size within the range of 230-1000 nm, and a polymerization initiator (C), wherein the curable composition is characterized by having a value (V) of less than 5 and a chroma (C) of 0.05 or higher in colorimetric values according to the Munsell Color System in colored light on a black background, and a value (V) of 6 or higher and a chroma (C) of less than 2 in colorimetric values according to the Munsell Color System in colored light on a white background, each of the values (V) and chroma (C) being measured using a color difference meter in a state in which a 1-mm-thick cured article has been formed.

The invention discloses a cotton nano-cellulose whisker composite resin material for dental filling; the composite resin material, which is applied to a dental filling material, consists of a resin matrix and surface-modified cotton nano-cellulose whiskers, wherein the resin matrix is a mixture of Bis-GMA, TEGDMA, CQ and 4EDMAB. The addition of the surface-modified cotton nano-cellulose whiskers is 1-2% of the mass of the resin matrix. The whiskers provided by the invention, through appropriate addition, can avoid influence to the solubility, water absorption and color stability of the composite resin, and when the content of the cotton nano-cellulose whiskers reaches 1-2%, the optimum bending strength is achieved, which is 11% above that of a pure-resin matrix; and when the content of thecotton nano-cellulose whiskers is 1%, the bending strength is improved by 25% in comparison with the pure-resin matrix.

The invention relates to an image big data acquisition and processing method. The method includes providing and using of a multifunctional dental filling system based on image recognition. The system comprises data acquisition equipment, image processing equipment, image recognition equipment and automatic filling equipment. The data acquisition equipment is used for high-definition oral image data acquisition in an oral environment of a patient to obtain high-definition oral images; the image processing equipment is used for processing the high-definition oral images to obtain processed oral images; the image recognition equipment is used for recognizing target teeth and tooth cavities in the target teeth on the basis of the processed oral images and determining actual sizes of the tooth cavities on the basis of tooth cavity sizes and target tooth sizes; the automatic filling equipment starts a coarse adjusting mode after receiving the actual sizes of the tooth cavities, determines corresponding filler volumes on the basis of the actual sizes of the tooth cavities in the coarse adjusting mode, and injects filler into the tooth cavities of the target teeth according to the determined corresponding filler volumes.

A polymerisable dental filling and sealing composition is provided which comprises a mixture of at least one resin containing on average at least two acrylate or methacrylate groups and a copolymerisable methacrylate or acrylate monomer, which has a low viscosity compared with said resin, the copolymerisable monomer being present in an amount such that the composition can be introduced by syringing into a cavity having a diameter of less than 1 mm.

Conventional dental cements lack certain properties such as the facilitation of optimal re-mineralization. The novel bioactive glass-ionomer dental and bone cement formulations disclosed herein induces mineralization at the in vivo interface and exhibits superior handling properties (shorter setting time) and mechanical properties (improved bond strength to dentin and flexural strength). The present invention presents the first bioactive glass-ionomer dental cement with mineralization power, exhibiting improved bond strength to tooth structure, sharp setting time and superior mechanical strength. Materials of this invention can be used as bone cement, as a dental filling (restorative material), as a liner for deep cavity preparations (to avoid root canal therapies and tooth sensitivity), or as a luting cement to cement dental crowns. Moreover, it can be utilized in a flowable resin for use as a coating to prevent dental caries in their initial steps (white spots).

The present invention relates to a use of a poly(dialkylsiloxane) having terminal hydroxyl groups, wherein the alkyl groups contain 1 to 4 carbon atoms, for improving the strength and the surface of dental fillings that are based on glass ionomer cement compositions.

Embodiments of the present invention provide devices (tags), systems, and methods to determine structural integrity and other states of materials-of-interest, such as dental fillings, implants, and root canal posts, to name a few, in a non-invasive and contactless way; and using comparatively safe and / or low energy electromagnetic radiation, such as radio waves. Negligible-sized backscatter-tags with sensors are implanted in such materials-of-interest. Using backscatter imaging technology, the structural integrity and other states of the materials-of-interest may be monitored; which may allow non-invasive and contactless detection of problems such as cracking, bending, excessive pressure, improper temperature, and / or the like. Additionally, initially unknown locations of the implanted negligible-sized backscatter-tags with sensors may be readily determined upon a given scanning (reading) session; and thus mapped to provide an effective image of the material-of-interest.

A dental tool for use in photo-cured filling processes. The dental tool includes a tool tip formed from a material that allows the transmission of ultraviolet and visible light wavelengths through the tool tip without significant distortion or reflection. The material is also relatively high strength so not to shatter or break during use. The fill material will also not easily adhere to the tool. The material of a preferred embodiment is sapphire. The tool is able to continue to compact and shape the fill material while the composite polymer fill material is undergoing photo-curing. The light beam used for photo-curing is able to safely pass through the tool without the risk of damage to the surrounding tissue from reflection or distortion of the light beam.

A dental tool for use in photo-cured filling processes. The dental tool includes a tool tip formed from a material that allows the transmission of ultraviolet and visible light wavelengths through the tool tip without significant distortion or reflection. The material is also relatively high strength so not to shatter or break during use. The fill material will also not adhere to the tool. The material of a preferred embodiment is sapphire. The tool is able to continue to compact and shape the fill material while the composite polymer fill material is undergoing photo-curing. The light beam used for photo-curing is able to safely pass through the tool without the risk of damage to the surrounding tissue from reflection or distortion of the light beam.

Disclosed are compositions and methods of using such compositions for inhibiting matrix metalloproteinase activity in dental tissue. The compositions, methods and uses may prevent degradation of the bonding between restorative materials and dental tissues, thereby increasing durability and longevity of the restorative material-dental tissue bonds. For example, the compositions, methods, and uses of the present invention may be used for treating carious dental tissue such as by the creation of dental fillings, crowns, bridges, among other techniques, as well as the creation of esthetic laminate restorations.

The present invention relates to an aqueous dental glass ionomer composition for use in the treatment of cavitated carious lesions, which composition comprises a water-soluble, polymerizable polymer comprising acidic groups, which is reactive with the particulate glass in a cement reaction, whereby the polymerizable polymer has a polymer backbone and pendant groups having one or more polymerizable carbon-carbon double bonds. The dental glass ionomer composition is used as a permanent direct restoration.

The invention belongs to the field of nanometer materials, and particularly relates to composite resin used for dental filling and a preparation method thereof. The composite resin used for dental filling includes, by weight, 55-70 parts of polyacrylic resin, 15-30 parts of chitin, 10-15 parts of nano-silica, 1-8 parts of plasticizer, 0.1-2 parts of coupling agents, 0.2-1 part of antioxidant and 5-10 parts of caries preventive agents. In the preparation process, the polyacrylic resin and the chitin are mixed evenly; other materials are added and mixed evenly; and finally double-screw extrusion granulation is carried out. The composite resin used for dental filling is good in biocompatibility, good in abrasion resistance and suitable for dental filling on the aspect of viscosity. The preparation method is simple, feasible and suitable for production.

The invention relates to dental pulp capping and pulp retaining paste, which is prepared from iodine glycerin, iodophor, phenocamphor, creosote and zinc oxide powder, wherein the volume ratio of the iodine glycerin: the iodophor: the phenocamphor: the creosote is (3 to 4):(1 to 2):(1 to 2):(3 to 4); the ratio of the creosote(mL): the zinc oxide powder (g) is 1:(4 to 6); all ingredients are mixed and are prepared into the paste, and thus the dental pulp capping and pulp retaining paste is obtained. The paste has the advantages that after dental pulp is exposed, the nerve burnt killing, the nerve removal and the root canal therapy are not needed; the whole tooth body with the tooth root becomes a dead tooth; the dental pulp capping and pulp retaining paste is directly smeared on the exposed surface of the dental pulp, hard hulls can be formed on the surfaces of dental pulp active body cells; the normal physiological function state of the tooth body is stably recovered; in addition, the treatment process time is shorter; the subsequent consultation times of a patient are fewer; the work intensity of oral doctors is reduced. The pulp capping and pulp retaining paste can be applied to the protection of tooth body dental pulp exposure positions.

An application of cyclic carbonate as the initiator assistant of the photo-curable filling used for filling tooth is disclosed. Its advantages are low poison and high biocompatibility.

A bone substitute composition includes glass flake and a hardenable material. The glass flake is a particle with an aspect ratio of, at least, 20:1 The preferred thickness of the glass flake is in the range from 200 to 1,000 nm and the average particle size is, preferably, from 20 to 60 μm.

A dental filling resin material and a preparation method thereof are provided. The material is made of the following components in parts by weight, 15 to 30 parts of polyvinyl chloride resin, 5 to 11parts of propylene glycol alginate, 6 to 10 parts of dodecylamine oxide, 15-18 parts of polyhydroxyethyl methacrylate, 10-15 parts of chitin, 2-5 part of fimbrin, 10-11 parts of chitosan fiber, 10-12parts of cystine diethyl ester, 5-6 part of anti-caries agent, 4-6 parts of nano silver powder, 5-7 parts of paeonol, 10-12 parts of antioxidant, 5-6 parts of nano filler, 2-3 parts of stabilizer and15-20 parts of double distilled water. The filling resin material has excellent surface hardness and good abrasion resistance, and is easy to be polished. An anti-caries agent is added into the filling resin material in the invention, which can effectively prevent dental caries; The dental filling resin of the invention is added with nano silver salt, which can effectively inhibit oral bacteria; The filling resin material does not contain heavy metals and is environmentally friendly; And the preparation method is simple and feasible.