11 results about "Natural tooth" patented technology

The invention relates to a zirconia-based all-ceramic false tooth and a preparation method thereof. A core layer of the zirconia-based all-ceramic false tooth is prepared from the following components in parts by mass: 90 to 94 parts of ZrO2, 5 to 9 parts of Y2O3, 0.1 to 0.5 part of Al2O3, 0.01 to 0.5 part of Fe2O3, 0.01 to 0.5 part of Er2O3 and 0 to 0.2 part of MnO2, and a shell layer of the zirconia-based all-ceramic false tooth is prepared from the following components in parts by mass: 24.5 to 49.5 parts of CaCO3, 45 to 50 parts of SiO2, 0 to 25 parts of MgO, 0.01 to 0.5 part of Fe2O3, 0.01 to 0.5 part of Er2O3 and 0 to 0.2 part of MnO2. The preparation process comprises the following steps: performing dry pressing and isostatic pressing on raw materials of the core layer, presintering, and carving to obtain a zirconia-based false tooth biscuit; meanwhile, calcining raw materials of a shell layer, then adding deionized water, a dispersing agent and an adhesive, and carrying out ball milling and mixing to obtain calcium-magnesium-silicon-based ceramic slurry; and coating the calcium-magnesium-silicon-based ceramic slurry on the surface of the zirconium oxide-based false tooth biscuit, and sintering to obtain the zirconium oxide-based all-ceramic false tooth provided by the invention. The zirconia-based all-ceramic false tooth has good jade texture and is closer to the natural color of natural teeth.

This invention discloses a modular denture with adjustable installation height, comprising an installation base with multiple installation cavities at the top and multiple positioning slots at the bottom; multiple dentures are movably fitted into their respective installation cavities, with their roots movable vertically within the cavities; and a lifting drive mechanism, embedded in each installation cavity, for independently driving the corresponding denture for height adjustment; the lifting drive mechanism includes: an adjusting shaft horizontally rotatable inside the installation base, one end of which extends out of the side wall of the installation base to form an operating end; and a driven shaft vertically rotatable within the installation cavity; when the adjusting shaft rotates, it drives the driven shaft and lead screw to rotate via a bevel gear transmission mechanism, causing the threaded slider and dentures to rise and fall vertically, thereby achieving denture height adjustment. This invention solves the problem that most existing dentures use a fixed connection with the base, making it difficult to adjust the height after installation and to personalize the adjustment according to the actual height of the patient's natural teeth.

The present application relates to the technical field of oral prosthetics, in particular to a porcelain dental prosthesis color prediction system, a construction method and a prediction method, comprising: a multi-modal image acquisition module for acquiring high-definition color images of natural teeth in the oral cavity, three-dimensional scanning images of tooth preparation surfaces and microstructure images of porcelain prosthesis substrates, and synchronously acquiring environmental light parameters; an image recognition processing module for processing original data, outputting natural tooth color space feature vectors, tooth preparation surface morphology parameters and porcelain layer substrate micro-pore distribution parameters; an intelligent color prediction module for constructing a deep learning model, combining an environmental light correction algorithm to predict the final presented color data of the prosthesis; a parameter output and optimization module for generating a color deviation report, outputting porcelain layer thickness adjustment suggestions and firing process parameter optimization schemes, and supporting visual display of the prediction effect. Thus, the problems of one-sided prediction dimension and subjective optimization in the prior art are solved.

The utility model discloses a prevent edge collapse porcelain metal porcelain tooth, related to metal porcelain tooth technical field, including metal tooth body and porcelain body, metal tooth body includes fixed part and movable part, and the fixed part is installed on the natural tooth, and the movable part is provided with the slot that is matched with movable part side wall shape on, and the flexible strip is fixedly connected between the edge part of fixed part and movable part, and the middle part of fixed part is inserted with the slot and is connected with the rubber pad between the groove fixedly, and the fixed part and the inner wall of groove are all smooth surface, and a plurality of weakening grooves are equidistantly seted up on the rubber pad. The utility model discloses a metal tooth body is set up as the fixed part of fixed natural tooth and the movable part that can be opposite fixed part movable, and the rubber pad of weakening groove is seted up between the both, and the pressure is transferred, when the tooth bites to the hard thing, the rubber pad will be deformed (be pressed flat), makes the porcelain body can get the buffer, has reduced the phenomenon that porcelain collapses when porcelain body suffers the hard thing obstruction suddenly.

An anatomical dental implant arranged to be implanted in a naturally occurring cavity of the jawbone, the implant comprising at its apical side a root part arranged to anchor the implant in the cavity and at its occlusal side an abutment part arranged for supporting a dental prosthetic element, wherein the root part comprises an outer surface arranged to come into contact with the cavity walls, and wherein the root part comprises an outer section adjacent to the outer surface of the root part, wherein the outer section of the root part is arranged to deform plastically upon insertion of the root part into the cavity such that the root part substantially conforms to the shape and size of the cavity.

This invention relates to the field of oral medical device technology and discloses a molar-pushing device based on biomedical engineering, which combines implant screws with fixed orthodontic appliances. The device includes alveolar bone, teeth mounted on the alveolar bone, brackets installed on the teeth, and fixed screws installed within the alveolar bone. The inner wall of the fixed screws is provided with an anti-dislodgement mechanism, and the circumferential surface of the fixed screws is provided with a protective mechanism to prevent impact to the alveolar bone. This invention can simultaneously move and correct multiple molars, while the elastic telescopic rod can prevent excessive friction damage to adjacent teeth. It can simultaneously consolidate multiple teeth, improving the orthodontic consolidation effect and efficiency of the device for multiple natural teeth. The protective sleeve can improve the stability of the teeth during movement, ensuring that the teeth do not shift due to uneven pressure during the orthodontic process, thus improving the accuracy of the device in consolidating the teeth.

The present invention relates to a dental prosthesis having a structure similar to a natural tooth and a method for manufacturing the same, and discloses a dental prosthesis which is a solidified product containing ceramic particles dispersed in a polymer matrix, and a method for manufacturing the same using a 3D printing method, the dental prosthesis comprising: a first solidified product layer having a content of ceramic particles of 70 to 90 wt%, and an average particle diameter of the ceramic particles of 100 to 1000 nm; and a second solidified product layer which is adjacent to an inner side of the first solidified product layer, has a content of ceramic particles of 40 to 60 wt%, and an average particle diameter of the ceramic particles of 10 to 500 µm. Thus, the dental prosthesis exhibits a structure similar to a natural tooth, i.e., exhibits a structure and physical properties similar to a natural tooth having a surface of enamel and an interior of dentin.

This invention discloses a device and method for measuring occlusal force of a dental crown, belonging to the field of oral restoration technology. It includes an installation cavity on the inner side of the crown body adapted for clinical implant abutments or natural tooth preparations to accommodate a pressure sensing module, with the cavity layout avoiding stress concentration areas on the inner side of the crown. Occlusal force distribution and peak force are collected through a multi-array layout of the inner pressure sensing modules. The pressure sensing modules employ multi-layer biocompatible encapsulation and integrate a temperature drift compensation unit. The pressure sensing modules are connected to a transmission unit, which transmits the collected occlusal force data to a data processing terminal. The data processing terminal integrates an anomaly warning module and an intelligent analysis module. This invention has the advantages of in-situ monitoring, high precision, durability, and ease of maintenance.

The application discloses a kind of zirconia ceramic materials for dental restoration and preparation method thereof, it is related to dental restoration material technical field, including raw material processing system, forming system and sintering system, the raw material processing system includes ball mill, spray drying tower and cyclone separator, the forming system includes isostatic press and mould group, the sintering system includes atmosphere protection furnace and temperature control module, also includes S1, raw material weighing and mixing, S2, ball milling refinement, S3, spray drying granulation, S4, mould filling, S isostatic pressing forming and green body initial inspection, S6, pre-sintering and grain boundary control, S7, final sintering and densification strengthening, S8, precision machining and performance comprehensive evaluation.The application is prepared by S1-S8 steps, the effect that the spherical granulation powder with uniform composition, suitable granularity and good fluidity is prepared, the bending strength of zirconia ceramic material is improved simultaneously, and the light transmittance is improved, and the material color degree is closer to natural dentin by passing hydrogen sintering.

The application discloses a glass ceramic dental crown and a preparation method thereof, and relates to the technical field of glass ceramic dental crown. The preparation method adopts lithium disilicate as a base material, and is combined with rare earth doped hydroxyapatite and functional crystals. By accurately controlling the synergistic ratio of each component, the unity of mechanical properties, biological adaptability and aesthetic effect is realized. The rare earth doped hydroxyapatite is prepared by a hydrothermal precipitation method, the dispersion effect of trisodium citrate is used to inhibit particle agglomeration and promote the interface combination with human hard tissues; and the rare earth doped fluorescent powder is used to construct monodisperse light emitting centers by controlling a rare earth ion doping process, so that concentration quenching is avoided, and the fluorescent properties close to natural teeth are given to the dental crown.

This invention relates to a lithium disilicate ceramic-dental fluid resin composite material and its preparation method. The composite material is prepared by 3D printing a lithium disilicate ceramic-photoinitiating resin composite slurry using a biomimetic dental crown model as a standard. The composite slurry, by weight, comprises: 65-75 parts lithium disilicate glass powder, 12.5-17.5 parts 1,6-hexanediol diacrylate, 2.5-7.5 parts pentaerythritol tetraacrylate containing the stabilizer MEHQ, 3-5 parts dispersant, 0.05-0.15 parts initiator, and 0.025-0.075 parts light absorber. The biomimetic crown model is a composite structure of concentric rings of glass sponge and wheel-shaped nodes resembling horsetail grass. This invention aims to construct a lithium disilicate ceramic framework with a radial-concentric multi-level structure through biomimetic structural design, and impregnate it with resin to form a composite material. This significantly improves the fracture toughness and energy absorption capacity of the material while maintaining sufficient strength, and makes its elastic modulus and density close to that of natural teeth, thus improving biomechanical compatibility.