22 results about "Tooth Tissue" patented technology

The invention relates to a dental drilling hardness real-time monitoring method based on vibration signal analysis and a dental hardness sensor. The dental drilling hardness real-time monitoring method comprises the following steps: acquiring a three-dimensional vibration displacement signal; after filtering and multi-dimensional feature extraction, obtaining a vibration feature vector representing the mechanical impedance of the tooth body; inputting the hardness index and the vibration displacement into a trained machine learning model, and mapping and outputting the hardness index and the vibration displacement of the current drilling area in real time; packaging with a timestamp, and serializing and storing as a traceable historical record; the system continuously presents hardness change in a dynamic waveform and a color gradient, and prompts when detecting that the hardness changes suddenly or crosses a boundary. Compared with the prior art, the method has the advantages that the three-dimensional micro-vibration signal of the drill bit can be converted into the digital fingerprint of the mechanical impedance of the tooth tissue in real time, and a visualization-reminding closed loop is driven by the hardness index flow synchronized with the timestamp, so that the drilling hardness in-situ sensing is realized.

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 invention relates to the technical field of oral cavity medical instruments, and provides a tooth tissue outer fixing sleeve for preventing subfissure of teeth from splitting, the tooth tissue outer fixing sleeve comprises an elastic unit, two lock catch units and a fixing band, the two sides of the elastic unit are connected with the lock catch units respectively, the lock catch units are provided with one-way through holes, and the fixing band is provided with one-way through holes. The fixing band can penetrate through the one-way penetrating holes in one direction, the two ends of the fixing band penetrate through the one-way penetrating holes in the lock catch units respectively, the fixing band, the two lock catch units and the elastic unit form an annular structure, and the lock catch units can be fixed to the surfaces of teeth in an adhering mode. And an interval space is arranged between the two lock catch units. By means of the technical scheme, the problems that in the prior art, a hidden crack tooth fixing mode is troublesome to operate and difficult to clean are solved.

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.

The invention relates to the field of dental instruments, in particular to a combined crown cutting guide plate and a design and preparation method thereof. The combined crown cutting guide plate comprises a public main guide plate and at least one cutting sub-guide plate detachably connected with the public main guide plate. The common main guide plate comprises abutment retention plates arranged on the two sides, and a first connecting rod and a second connecting rod which are connected with the abutment retention plates on the two sides; a crown cutting working area is defined by the first connecting rod, the second connecting rod and the abutment tooth retention plate; the cut-off guide plate is installed between the first connecting rod and the second connecting rod, and the cut-off guide plate is provided with an irregular cut-off face which is attached to a to-be-cut crown tooth body and enables the to-be-cut crown tooth body to be exposed. Compared with the prior art, the combined crown cutting guide plate disclosed by the invention can meet the requirement that redundant tooth tissues outside a common insertion path are cut off in the tooth preparation process of teeth with relatively large inclination in the long axis direction of the teeth, so that the common insertion path is obtained, and the requirement of minimally invasive tooth preparation is met as much as possible.

The invention provides a light-cured dental restoration and regeneration material and a preparation method of the light-cured dental restoration and regeneration material. The antibacterial coating is prepared from the following raw materials: 20 to 30 parts of bisphenol A-glycidyl methacrylate, 10 to 20 parts of carbamate dimethacrylate, 15 to 25 parts of diluent, 30 to 45 parts of mesoporous mineralized boron nitride-bioglass composite filler, 5 to 10 parts of nano-hydroxyapatite, 3 to 8 parts of biquaternary ammonium salt-tea polyphenol synergistic antibacterial complex, 1 to 3 parts of photoinitiator and 3 to 8 parts of flexibilizer. 2-5 parts of a thixotropic regulator and 0.1-0.5 part of a coloring agent. The photocuring dental restoration regeneration material has the technical effects of high strength, good toughness, good antibacterial activity, capability of inducing tooth remineralization, tight combination with tooth tissues, high photocuring efficiency, convenience in operation and excellent aesthetic degree.

The application provides a manufacturing method and a using method of a personalized precise tooth-removing guide plate, and belongs to the technical field of oral micro-invasive repair. The manufacturing method comprises the following steps: obtaining a digital impression or model of an initial state dentition and processing the digital impression or model by using a three-dimensional design software to obtain a digital diagnostic wax pattern; comparing and fitting the digital impression or model of the initial state dentition with the digital diagnostic wax pattern to design a personalized precise tooth-removing guide plate digital model; and outputting data of the personalized precise tooth-removing guide plate and 3D printing the personalized precise tooth-removing guide plate. The application is aimed at the actual situation that teeth need to be restored in appearance and function by improving the tooth shape in the case of lip (tongue) inclination or ectopia, mesial (distal) twist and incisal (occlusal) elongation. The personalized precise tooth-removing guide plate takes the expected repair effect as the target, can realize accurate evaluation before treatment and indicate the actual tooth tissue amount that needs to be removed before the in-mouth manufacturing of a diagnostic veneer, and improves the clinical diagnosis and treatment level and the patient satisfaction.

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 embodiment of the invention discloses a tooth model establishment method, a correction scheme design method, a correction appliance manufacturing method and a correction appliance. The tooth model building method comprises the following steps: acquiring a multi-layer image of an oral cavity by adopting a CBCT (cone beam computed tomography) technology; identifying a tooth pixel point region corresponding to each type of tooth tissue in each layer of image; stacking the multiple layers of images in sequence and acquiring three-dimensional point cloud data of tooth pixel point areas corresponding to various types of tooth tissues; and establishing a three-dimensional tooth model according to the three-dimensional point cloud data of the tooth pixel point area corresponding to each type of tooth tissue. According to the embodiment of the invention, each layer of the multi-layer image is identified, so that the division result is more accurate than that of directly performing division on the complete CBCT image; and finally, stacking the multiple layers of images in sequence to obtain complete three-dimensional data corresponding to each tooth. And the three-dimensional tooth model is established according to the three-dimensional data corresponding to each tooth, so that the division result is more accurate, and the established three-dimensional model is more accurate.

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 relates to dentistry, and more particularly to a novel agent in the form of a gel for the treatment and / or prophylaxis of conditions characterized by loss of minerals and salts front tooth enamel. The claimed agent, provided in gel foam, for the treatment and / or prophylaxis of conditions characterized by loss of minerals and salts from tooth enamel contains the following ingredients: 19 wt % glycerin, 10 wt % xylitol 2.3 wt % hydroxyethyl cellulose, 0.09 wt % guar gum, 1.5 wt % calcium glycerophosphate, 0.12 wt % magnesium chloride, 0.9 wt % non-ionic surfactant, 0.24 wt % preservative, 0.04 wt % flavouring agent, she remainder water. The claimed agent provides effective treatment and prophylaxis of the demineralization / hypomineralization of dental tissue, mild forms of fluorosis, and the adverse consequences thereof.

The present invention relates to a process for preparation and cryopreservation of dental pulp teeth and products thereof resulting in innovative cellular systems useful for therapeutic application based on the mesenchymal stem cells, so called dental pulp stem cells (DPSCs).The objective of this invention is to provide the most adequate cellular isolates from dental pulp tissue from a tooth of a human subject. Fast expanding populations of DPSCs can be obtained, while maintaining their chromosomal stability, and determined to present the phenotypical and functional characteristics desired of such populations.In another aspect, the present invention provides a novel and simplified method increasing thSpece viability of the dental tissue during the storing and banking. Also, the isolation of DPSCs from these teeth is improved and herein disclosed.Therefore, the present invention is in the field of cell-based therapies, regenerative medicine, and optimized processes for obtaining the desired cell-isolates.

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.

The utility model discloses an oral cavity shooting device convenient to operate and a modeling system.The oral cavity shooting device convenient to operate comprises a holder used for being mutually positioned with oral cavity tissue, and the portion, close to the lip, of the holder is provided with a matching part; the restraining piece is rotationally matched with the matching part, and an arc-shaped track is defined by the restraining piece; the shooting arm is in sliding fit with the restraining part and moves around a dental arch curve of the tooth tissue on the arc-shaped track, and a plurality of imaging devices are arranged on the shooting arm at intervals; one end of the control arm is connected to the shooting arm, and the other end extends out of the oral cavity; the control arm drives the shooting arm to slide relative to the restraining part and / or the restraining part rotates relative to the holder so as to change the position and posture of the imaging device relative to the tooth tissue. The holder and the restraining part are used for restraining the shooting arm through movement, so that a patient can conveniently drive the shooting arm to move in the oral cavity through the control arm so as to obtain clear, stable and multi-view images, and the use experience is improved.