83 results about "Tooth filling" patented technology

The invention is directed to a piston or plunger (1) for a material delivery system (10) and a delivery system (10), such as a cartridge delivery system or syringe for storage and dispensing of a viscous or pasty material, in which the system includes a piston or plunger (1). The piston or plunger (1) is preferably provided for a unit dose dental capsule for the direct placement of a dental material, such as a light-curable tooth filling material, into a desired location.

The invention discloses an antibacterial polymer material which is polymerized by a plurality of components including antibacterial oligomer. The specific components comprise 30-99.5wt percent of unsaturated double bond monomer, 0.01-50wt percent of unsacturated double bond antibacterial oligomer, 0-10wt percent of hydrophilic monomer, 0.01-5.0wt percent of polymerization initiator and 0-80wt percent of fillings. The antibacterial polymer material of the invention is safe to the health of people and has long antibacterial performance and the antibacterial rates of the invention to staphyloccocus aureus rosenbach and escherichia coli are both more than 99percent. The invention is applicable for medical treatment and hygiene industries, including the wound dressing material, dental recovery materials used in dentistry (such as tooth bonder, tooth recovery coating, tooth recovery substrate and tooth filling materials, etc.), surgery seam and materials for daily use, etc.

The invention discloses a warm extrusion forming method for a straight toothed spur gear. The blank is heated by adopting warm forming and combining differential temperature forming, and reasonable die design and lubricating selection are realized. According to the technical scheme, the first method comprises the following steps of extruding, upsetting and performing reverse secondary extrusion (in the same set of extrusion set); and the second method comprises the following steps of extruding and performing reverse secondary extrusion (concave dies of different sizes). According to the forming process, the forming force can be effectively reduced, and the tooth filling form is good. The warm extrusion forming method has the advantages that the defects that the cutting machining method is low in material utilization rate, low in production efficiency and high in product cost and the gear strength and service life are reduced because the metal fiber is cut are overcome; and meanwhile, the problems that the other plastic forming methods are high in forming force, difficult in corner filling and short in service life of the die and the like are solved, and the warm extrusion forming method is expected to realize industrial production of straight toothed spur gears in the field of plastic forming.

The invention discloses a composite material for dental prosthesis and a preparation method of the composite material. The composite material is prepared from the following components in parts by weight: 20-40 parts of polyethylene, 25-40 parts of xanthan gum, 20-25 parts of hydroxy calcium phosphate, 2-8 parts of chitosan, 1-6 parts of tributyl citrate, 4-8 parts of a phase transfer agent, 2-6 parts of divinyl tetramine, 25-35 parts of 2-methyl-2-propenoic acid 2-(phosphonooxy) ethyl ester, 4-8 parts of silver lactate, 7-20 parts of titanium dioxide, 10-15 parts of silicon dioxide, 3-8 parts of an antioxidant, 4-8 parts of hydroxyanisole, 1-13 parts of calcium fluophosphate, 8-23 parts of ethanol and 25-45 parts of double distilled water. The tooth filling material disclosed by the invention is good in mechanical strength, high in intensity and good in biocompatibility, and the safety of the material to human bodies is improved. The preparation method disclosed by the invention is simple and easy to implement, and is suitable for industrial production.

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 invention relates to a preparation method for a decayed tooth filling and repairing material and belongs to the technical field of dentistry restoring. According to the preparation method for the decayed tooth filling and repairing material, fresh ox bones serve as raw materials to prepare natural hydroxyapatite powder, and the natural hydroxyapatite powder is combined with casein phosphopeptides; then silicate glass powder is subjected to hydrofluoric acid surface roughing treatment, nanometer titanium dioxide and aluminum fluoride are used to be combined with the silicate glass powder, and modified glass powder with a good antibacterial property is prepared; and finally the modified glass powder, polyacrylic acid, itaconic acid, calcium fluoride and the like are ball-milled into a cement, and the cement and the composite natural hydroxyapatite powder are ball-milled to prepare the decayed tooth filling and repairing material. According to the preparation method for the decayed tooth filling and repairing material, the antibacterial property is improved through titanium dioxide and fluoride ions, and the cementation property of the cement is improved, so that the prepared decayed tooth filling and repairing material is tightly attached to the dentin surface, a hydroxyapatite layer is deposited, dentin remineralization is achieved, a firm and compact protective layer is formed, and decayed teeth are effectively restored.

The invention discloses an antibacterial and durable tooth filling composite material and a preparation method thereof. The composite material is prepared from the following components in parts by weight: 30-40 parts of polymethyl methacrylate, 20-25 parts of hydroxyl calcium phosphate, 13-15 parts of acetoacetoxyethyl methacrylate, 3-8 parts of fimbrin, 1-3 parts of 2-thiol benzimidazole, 5-12 parts of a phase transfer agent, 12-30 parts of glycosaminoglycan, 5-10 parts of steamed bone meal, 4-8 parts of silver cyclohexylbutyrate, 3-5 parts of casein, 4-8 parts of hydroxy anisole, 3-8 parts of an antioxidant, 12-24 parts of sorbitol, 8-23 parts of benzyl alcohol and 25-45 parts of double distilled water. The composite material disclosed by the invention is capable of improving tissue compatibility and blood compatibility, and the composite material is antibacterial, capable of improving mechanical and physical properties, wear-resistant and durable to use; and the preparation method has the advantages of being simple in process, easy to operate, high in yield, low in pollution to environment and the like.

A novel amorphous divalent metal ion salt for enhancing the manageability of a Portland cement and its application in dental field are disclosed. Typical formula (I), (II), or (III) of this amorphous metal ion salt are shown as following:

The invention discloses a single-component photocuring composite with the fluoride ion release property for dental restoration and application of the composite. The raw materials used for preparing the single-component photocuring composite with the fluoride ion release property for dental restoration comprise water soluble or at least partially water soluble acid molecule structure-containing polymeric resin monomers or oligomer or a mixture thereof, glass ionomer cement filler with the fluoride ion release property and a photocuring polymerization initiating system. The photocuring composite is the single-component photocuring composite, use is convenient, the fluoride ion release property is achieved, and meanwhile the mechanical and physical properties are achieved; the composite can be used as gasket materials under dental adhesives and other dental restoration materials, pit and fissure sealing materials on surfaces of teeth, tooth filling repair/restoration materials, post-core composition materials for dental crown restoration, root canal orifice sealing materials and photocuring orthodontic cement bonding materials and used for other dental treatment and restoration application.

A tooth is irradiated with light (5), in particular with visible light for identifying tooth-coloured tooth filling residues (3) of the tooth. The light with which the irradiation procedure is effected includes at least one wavelength component that is absorbed or scattered by the tooth filling material differently from the tooth material in such a way that the tooth filling material differs from the tooth material in respect of its brightness or in respect of its colour. Thus the identification of tooth filling residues (3) can be effected in such a way that the dentist can recognise the tooth filling residues (3) with the naked eye, or possibly with the assistance of simple technical aids such as for example a colour filter.

A dental insertion for a tooth filling, the insertion having a surface and a body extending from the surface, wherein at least one cavity is arranged in the surface, the cavity extending at least from the surface to a center of the body. Further, a dental insertion dummy having similar dimensions to a dental insertion, a device for handling of a dental insertion, a device of an electromagnetic radiation-conducting material for insertion into a dental insertion, a method for incorporating a dental insertion for a tooth filling into an interproximal space, a system including one or more of the insertions and devices and a method for production of insertions for dental treatment.

Methods to treat the defects in skeletal tissues characterized by protecting the marrow cells adjacent to the defects from apoptotic and/or necrotic cell death are disclosed. The methods provide additional benefits which are to reduce inflammation and irritation in the marrow tissues and assist promoting new skeletal tissue formation to an application of a simple skeletal formation or regeneration activity such as a bone growth factor. The methods may involve application of pharmacologically active peptidic compounds comprising about 15 to about 28 amino acids in their sequences characterized by containing at least one of an integrin binding motif such as an RGD sequence, a glycosaminoglycan attachment motif, and/or a calcium binding motif. The sequence may be a 23 amino acid sequence formulated for injection, topical application, or dispersed in a matrix such as collagen or a tooth filling composition or gum patch and administered to enhance bone/tooth growth or prevent loss.

The invention relates to a tooth filling material and a preparation method thereof. The tooth filling material includes, by mass, 15-35 parts of glycidyl methacrylate, 10-25 parts of Arabic gum, 5-20 parts of glass powder, 5-15 parts of silicon dioxide, 3-12 parts of nano montmorillonite, 1-6 parts of calcium carbonate, 0.5-3 parts of 1,6-hexanediol diacrylate, 0.8-3.5 parts of dicumyl peroxide, 0.3-1.5 parts of triethylene diamine, 0.2-1 part of EDTA, 0.2-1.2 parts of an organic tin stabilizer, 3-10 parts of zinc phosphate cement, and 0.1-0.5 parts of resorcinol monobenzoate. The tooth filling material has excellent mechanical performance and polishing performance, has the similar gloss and the similar coefficient of thermal expansion of a tooth, can effectively prevent edge micro-leakage and heat conductivity, has a good hole filling effect and is long in service life.

The invention discloses a high-modulus rubber compound and a high-load synchronous belt. The scorching time of rubber is prolonged, and the Mooney viscosity of the rubber is reduced, so that the rubber can be better mixed evenly and can be smoothly calendered and formed, the mobility of the rubber in sulfurization is increased, tooth filling is easier, the obtained synchronous belt has better integrated uniformity, the local stress aggregation phenomenon is difficult to occur, the anti-shearing strength of teeth of the synchronous belt and the tooth jumping prevention capability of the belt can be enhanced, and thus the loading capability of the synchronous belt is effectively improved and the service life of the synchronous belt is prolonged.

The invention provides a tooth filling adhesive comprising the following components of polyacrylate sodium, sodium carboxymethyl cellulose, calcium sulphate (dihydrate), whiteruss and chitin. The tooth filling adhesive has the characteristics of high performance, no any substance harmful a human body, nonirritant, no oppression, no hazard, no blood flow blockage, natural adhesion, comfortable feel, and the like and is a high-quality tooth filling adhesive.

The invention discloses a tooth protecting and whitening tooth brace. The brace comprises a brace main body, an artificial tooth I for replenishing a missing tooth part and an artificial tooth II forreplenishing a defect part, wherein the artificial tooth I and the artificial tooth II are located on the brace main body and are integrally formed with the brace main body. The artificial tooth I isa artificial tooth formed by printing according to a shape of the missing tooth, connection of the artificial tooth I and the brace is a part of the brace, and the artificial tooth I can play a supporting role on teeth on two sides after the brace is worn, so that an auxiliary tooth fixing effect is achieved; the artificial tooth II is a reserved part printed according to a defect shape of the tooth, and the artificial tooth II is matched with the defect part of the tooth to form a complete tooth after tooth filling; and a tooth support matched with the teeth is arranged on the brace main body. When the brace is worn, the tooth support is matched with the teeth, the artificial tooth part supports the teeth on the two sides, and damage of possible tooth function degradation and even large-area shedding caused by loosening of a gum due to missing or damaged teeth is prevented. The invention also provides a method for manufacturing and using the brace.

The invention belongs to the field of tooth filling quality evaluation based on an image technology, and discloses a tooth filling quality evaluation method and device. The method comprises the following steps: according to oral cavity picture to be tested, a preset target detection convolutional neural network model, a preset single-tooth segmentation convolutional neural network model and a preset region segmentation convolutional neural network model are adopted to respectively obtain the supplemented tooth position rectangular frame, the adjacent tooth position rectangular frame of the supplemented tooth, the single supplemented tooth picture, the adjacent tooth picture and the supplemented region picture of the surface of the supplemented tooth; and then corresponding tooth filling information evaluation results are respectively obtained according to the tooth information, and tooth filling quality evaluation is carried out on the tooth filling information evaluation results according to tooth filling quality evaluation standards. By means of the above manner, rapid tooth filling quality evaluation is achieved, and an accurate tooth filling quality evaluation result is obtained.