13 results about "Tooth Tissue" patented technology

A method and apparatus for detecting a distance of a probe contacting a tooth surface to a pulp of a tooth by determining an indication of a thickness of a dentin of the tooth is provided. The method includes illuminating tooth tissue of the tooth with the probe and then receiving data indicative of scattered light from the tooth tissue. A spectrum of the scattered light is then acquired and analyzed to further acquire a spectral analysis result. An indication of the thickness of the dentin of the tooth is then determined based on the spectral analysis result. The method can help prevent accidental exposure of the pulp during dental treatments such as drilling.

The invention discloses a snapshot type tooth optical parameter measurement and calculation method. The method comprises the following steps: controlling a snapshot type optical acquisition unit to synchronously acquire an original optical image data set containing multiple types of light components; pixel-level spectral features are extracted, and spectral response intervals of different tooth tissues are distinguished; dividing and analyzing sub-regions in combination with an anatomical structure, constructing an optical characteristic initial analysis matrix, and obtaining spectral attenuation characteristic data; matching with a preset sample library to obtain a preliminary optical parameter estimation value; and introducing ambient light and equipment imaging deviation factor dynamic correction, and constructing an overall parameter distribution model to output core optical parameters. According to the method, tooth contact is not needed, the efficiency is improved through synchronous imaging, the defects of fuzzy tissue differentiation and poor interference resistance of a traditional method are overcome through spectrum-anatomical structure combined analysis and a dynamic correction mechanism, output parameters are accurate and stable, and the method is suitable for oral clinical diagnosis and tooth restoration scenes.

The application discloses a tissue culture method of Pterospermum acerifolium, which comprises the following steps: (1) preparation of explants, (2) tissue culture induction medium, (4) subculture, (5) rooting culture, and (6) transplanting of tissue culture seedlings. Through a series of processes such as disinfection, basic culture, proliferation culture and rooting culture of the tissue culture seedlings of Pterospermum acerifolium, a large number of Pterospermum acerifolium tissue culture seedlings with stable quality can be quickly obtained.

Composition for air polishing the surface of hard dental tissues. The present invention relates to a composition (1) for air polishing the surface of hard dental tissues, comprising at least: - a first abrasive powder suitable for polishing hard dental tissues, the first powder being present in the composition at a mass content of between 90% and 99.5%, and - a second powder of at least one anti-caking agent, different from the first powder, comprising at least one sodium stearyl fumarate powder present in the composition at a mass content of between 0.5% and 5% and having a D50 particle size of between 5 µm and 200 µm, for example between 10 µm and 80 µm, at least 50% of the constituent particles of the second powder having a smallest dimension greater than 100 nm. Figure for the abstract: Fig. 1.

The invention relates to the technical field of medical instruments, in particular to dental pulp nerve cell filling paste and a preparation method thereof, and the filling paste comprises the following components: 8-12% of an inorganic filler, 12-18% of an antibacterial filler, 5-8% of slow-release antibiotic microspheres, 8-12% of an nHA-Col collagen composite material, 1-3% of a traditional Chinese medicine extract, and the balance of a liquid agent. According to the technical scheme, growth and reproduction of pathogenic microorganisms can be effectively inhibited, two schemes of protecting dental pulp nerve cells, opening pulp and not opening pulp are achieved, and the problems of multiple complications such as over-changeable blackening and breaking of the existing nerve-killing and root-tip-extraction nerve excision tooth tissue surface are successfully solved; the purpose that the permanent dental pulp nerve cell filling can be completed by one-time minimally invasive rust removal of a patient in about 15 minutes is achieved, the dental pulp nerve cells are protected, dental pulp nerves are not killed, apical nerve cells are completely filled at one time, and time and cost are saved.

The present invention relates to a composition (1) for air-polishing the surface of hard dental tissues, comprising at least: a first abrasive powder capable of polishing hard dental tissues, the first powder being present in the composition in a weight content of between 90% and 99.5%, and a second powder of at least one anti-caking agent, different from the first powder, comprising at least one sodium stearyl fumarate powder present, in the composition, in a weight content of between 0.5% and 5% and having a particle size D50 of between 5 μm and 200 μm, for example between 10 μm and 80 μm, at least 50% of the constituent particles of the second powder having a smallest dimension greater than 100 nm.

The utility model discloses a multifunctional safety mouth mirror which comprises a mouth mirror head, a mouth mirror piece and a mouth mirror handle, one end of the mouth mirror handle is connected with the mouth mirror head, the mouth mirror piece is installed on the mouth mirror head, the mouth mirror head and the mouth mirror handle are hollow and communicated with each other to form a cavity, and a keel capable of moving in the length direction of the mouth mirror handle is arranged in the cavity. The keel is connected with a plurality of tension ropes in a branch shape in the mouth lens head, supporting rods are arranged on the two sides of the mouth lens head, the tension ropes penetrate through the side wall of the mouth lens head and are connected with the supporting rods, a plurality of springs are further connected between the mouth lens head and the supporting rods, and the tension ropes are sleeved with the springs; and a plurality of net bags are arranged between the mouth lens head and the supporting rod. The opening state of the net bag is achieved through the spring, tooth tissue can be blocked and prevented from being swallowed by a patient by mistake, the supporting rod is made to be close to the oral cavity head by pulling the tensioning rope, the net bag is folded, and when the net bag does not need to be used, the net bag is folded, and operation of oral cavity treatment is facilitated.

The invention discloses a method for increasing the bonding strength of a zirconia veneering surface, and relates to the field of materials.The zirconia is subjected to plasma treatment through a handheld plasma generator, and then the treated zirconia surface is evenly coated with a layer of resin adhesive containing an Mdp functional monomer. According to the method disclosed by the invention, the Mdp-containing resin adhesive and the argon handheld plasma are used for carrying out bonding treatment on the zirconium oxide restoration material, so that the contact angle is reduced, the surface hydrophilicity is increased, the bonding performance of zirconium oxide is improved, and the connection between the zirconium oxide veneering restoration and the tooth tissue is more stable, so that the risk of falling off of the restoration is reduced.

The invention provides a method for detecting physiological and functional characteristics of tooth hard tissue based on PS-OCT (Pressure Swing-Optical Coherence Tomography). The method comprises the following steps: acquiring an interference signal of tooth hard tissue by using a PS-OCT system; calculating the complex amplitude of the PS-OCT interference signal, and further calculating to obtain a PS-OCT intensity image and various polarization images; based on the PS-OCT phase delay image, calculating and outputting a density parameter of the tooth hard tissue; on the basis of the PS-OCT optical axis image, calculating and outputting a structural confusion degree parameter of the tooth hard tissue; and based on the PS-OCT polarization uniformity image, calculating and outputting a depolarization parameter of the tooth hard tissue. Compared with the prior art, the system and the method have the advantages that high-resolution and large-view-field imaging can be carried out on in-vivo tooth tissue in a real-time and lossless mode by using the PS-OCT technology, intensity images and various polarization images can be obtained at the same time, and physiological and functional characteristics of tooth hard tissue are represented by various parameters.

The invention relates to the technical field of oral care or biomedical materials, and discloses preparation and use of an amorphous calcium phosphate nano-cluster solution, the preparation method comprises the following steps: preparing a first solution and a second solution which are isolated from each other before reaction, respectively containing soluble calcium salt and phosphate, according to the method, gamma-polyglutamic acid or gamma-polyglutamate is taken as a raw material, a double-stabilizer system composed of citric acid or sodium citrate and gamma-polyglutamic acid or gamma-polyglutamate is introduced, the two solutions are sprayed out synchronously through a double-cavity device during use, crystal growth is limited through the synergistic effect of the chelating effect and steric hindrance of the stabilizer, and the amorphous calcium phosphate nano-cluster with the particle size smaller than 20 nm is generated in situ. According to the invention, through physical isolation and instant mixing strategies, the problem that amorphous calcium phosphate is easy to agglomerate and inactivate in an aqueous solution is effectively solved; the obtained nano-cluster has excellent permeability, can go deep into a deep layer of a tooth tissue and is converted into hydroxyapatite in situ, so that enamel remineralization and dentin desensitization are realized.

The invention belongs to the field of biomedical and dental restoration materials, and particularly relates to a phosphorus-containing polymer loaded silver nanoparticle (PTM) / AgNPs composite material and application thereof in antibiosis, anti-caries and promotion of remineralization of tooth tissue, and a preparation method of the PTM / AgNPs comprises the following steps: dispersing the phosphorus-containing amphiphilic block copolymer PTM in water, and stirring to obtain a mixture; the preparation method comprises the following steps: adding an AgNO3 aqueous solution into a stabilizer and a carrier, and preparing the PTM-AgNPs compound through an in-situ reduction method. PTM is self-assembled in an aqueous solution to form micelles or vesicles, a nano reactor is provided for formation of AgNPs, aggregation of polymer chains is prevented, effective and stable AgNPs can be obtained, PTM and AgNPs are good in biological safety, an AgNPs antibacterial agent can be slowly released, phosphate radicals on PTM and AgNPs have an in-situ induction mineralization function, initial lesion is repaired, and the antibacterial effect is good. And the anti-caries ability of the tooth tissue is improved.

A depth-fixing bur and dental grinding machine adapted to tooth surface angles includes a bur handle, one end of which is connected to a drive device, and the other end of which is equipped with a ball drill. The bur handle also has at least two equally spaced disc drills along its axial direction, with the radial dimensions of the disc drills being larger than that of the ball drill. The ball drill is used for depth-fixing at the cervical region of the tooth, while the disc drills are used for depth-fixing at the body and incisal edge of the tooth. The ball drill and disc drills can perform depth-fixing at different locations of the tooth structure. During veneer depth-fixing, segmented grinding avoids unnecessary tooth tissue removal caused by grinding the cervical region and body, or the body and incisal edge. Furthermore, depth-fixing at the cervical region is performed by the ball drill, minimizing the risk of accidental injury to the gingiva near the cervical region.

The invention discloses a hard tissue repair material and a preparation method thereof. The hard tissue repair material is mainly composed of inorganic calcium salt and a photocuring high polymer material. The invention relates to a hydrogel material, in particular to a polyethylene glycol diacrylate (PEGDA) hydrogel material containing calcium oligopolyphosphate (CPO) and a preparation method thereof. CPO and PEGDA are compounded according to a certain proportion for the first time, and an injectable hydrogel material with relatively high mechanical strength and excellent biocompatibility is prepared by using a photoinitiator (LAP or I2959). The hydrogel material is further processed into three-dimensional structures with different shapes by utilizing a mold method or a three-dimensional (3D) printing technology, and is used for repairing defects of clinical hard tissues (such as bone tissues and dental tissues). The material has the characteristics of high adaptability, high safety coefficient, convenience and quickness in use, wide application prospect and the like.