164 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 dental plaque detection device comprises: an acquisition unit (101) for acquiring a first RGB image from reflected light and fluorescence from teeth, dental plaque, and tartar in an oral cavity irradiated with irradiation light of a predetermined wavelength; and a detection unit (102) for generating a second RGB image by performing image processing including first image processing on the first RGB image, and detecting the amount contained, per unit area, of a fluorescent substance contained in tartar and dental plaque attached to the teeth, on the basis of the second RGB image. The first image processing is processing for: extracting a natural tooth region to which dental plaque and tartar are not attached from the first RGB image; and adjusting the gain of at least two color components from among the red, green, and blue components of the first RGB image such that a first red pixel average value of a plurality of red pixel values of a plurality of first pixels constituting the natural tooth region, a first green pixel average value of a plurality of green pixel values of the plurality of first pixels, and a first blue pixel average value of a plurality of blue pixel values of the plurality of first pixels are made equal to each other.

The invention relates to the technical field of implants, in particular to a dental implant with biological activity and a preparation process thereof. In order to improve the biological activity of the dental implant, firstly, the surface of a dental implant blank is modified, after a honeycomb structure is generated on the surface of titanium alloy, a chitosan solution is further used for treating the dental implant material, and a chitosan material with positive charges and amino groups is introduced to the surface of the dental implant material, so that the biological activity of the dental implant is improved. The preparation method comprises the following steps: by taking a polyetheretherketone film as a raw material, introducing an aldehyde group, reacting with the polyetheretherketone under ultraviolet light, and introducing nano-hydroxyapatite with biocompatibility into the polyetheretherketone film in the process, thereby ensuring that a gap distance of more than 1nm exists between the dental implant and a natural tooth, and keeping the bone around the implant stable.

The invention relates to the technical field of dental implants in oral medicine, in particular to an optimal design of a geometric structure of a dental implant. According to the technical scheme, the method comprises the following steps: firstly, specifying cross section general forms of three types of implants, then, creating a natural tooth model based on multiple groups of head image data, counting the value range of the curvature radius of each type of natural teeth based on the natural tooth model, and obtaining the feature size of the implant and the corresponding optimal curvature radius thereof; according to the dental implant simulating the natural tooth root curvature and the design and implantation system thereof, the morphological characteristics of natural teeth are fully considered, the specific shape of the cross section of the upper end face of each type of implant under each feature size is determined, and finally the dental implant model is created based on the results. The oral cavity biomechanical requirement and the functional adaptability of the human body oral cavity can be better met, meanwhile, large-scale production can be achieved, and the requirement of large-scale clinical application can be met.

The invention belongs to the technical field of dental materials, and particularly relates to resin with gradually-changed color and light transmittance, a preparation method and application of the resin and a false tooth simulating natural teeth. The resin with the gradually changed color and light transmittance is formed by hot pressing of multiple layers of materials; the light transmittance and chromaticity of each layer of materials are strictly controlled, the absolute value of the difference value of the light transmittance of every two adjacent layers of materials in the multiple layers of materials is 1-7%, and the absolute value of the difference value of the light transmittance of the first layer and the last layer is larger than 20%; the color difference value of two adjacent layers of materials in the multiple layers of materials is smaller than 1, and the color difference value of the first layer and the last layer is larger than 4. The resin with gradually changed color and light transmittance provided by the invention is natural in color transition, two adjacent layers are mutually fused, the resin can be used for manufacturing a whole false tooth and a complete false tooth, and the manufactured false tooth has the effect of gradually changing light transmittance and color and can better simulate the aesthetic effect of the cutting end and neck of a natural tooth.

The invention relates to the technical field of color correction, in particular to a baked porcelain false tooth color adjusting method and system based on image analysis, and the method comprises the following steps: identifying teeth, gingiva and surrounding tissues in an image, determining a region boundary by using an edge detection technology, and calibrating a region according to gray difference. According to the method, teeth and surrounding tissues are accurately segmented by using an edge detection technology, accurate identification of a tooth area in an image is realized, a clear starting point is provided for color adjustment, a wave band with high reflectivity is selected, the quality of image data is optimized, the precision of subsequent color analysis is ensured, and hue, brightness and saturation are adjusted in a CIELAB color space; the matching degree of denture colors and natural teeth is improved, the visual coherence is enhanced, neural network analysis and time sequence data are integrated to predict long-term color changes, a real-time feedback mechanism automatically adjusts color parameters according to illumination conditions, the visual effect is continuously optimized, and the naturalness and consistency of colors in different environments are guaranteed.

The invention provides an oral ceramic restoration optical prediction matching method and system based on deep learning, relates to the technical field of oral medicine, and solves the limitation problems that existing oral restoration is low in clinical colorimetric accuracy, depends on artificial experience, has medical technology communication information deviation and the like. The method comprises the following steps: acquiring spectral data of natural teeth, dentin, enamel and different types of ceramics, and calibrating the semi-permeability of enamel and ceramic samples by using an extinction coefficient; obtaining a ceramic-dentin complex and composite spectrum data thereof, constructing a multi-layer sensor model and completing training; and splicing the dentin spectral data and the ceramic spectral data into an initial input vector, splicing the initial input vector with the calibrated semi-permeable constraint vector, and inputting the spliced initial input vector into a multi-layer sensor model to obtain a model matching result. The intelligent model for automatically generating the natural tooth defect repair scheme is established based on the deep learning technology, the intelligent repair design and the visual repair effect are achieved, and clinical application is effectively guided.

The invention relates to an artificial intelligence technology-based digital form false tooth restoration generation method, which comprises the following steps of: performing 3D scanning on the oral cavity of a patient to obtain a three-dimensional digital impression of upper and lower jaw teeth, appointing the position of a preparation body, performing local cutting by taking the preparation body as a center, and obtaining a three-dimensional digital impression of the upper and lower jaw teeth; the cut area comprises a preparation body, adjacent teeth and three-dimensional impression information of jaw teeth; inputting the cut impression information into a deep neural network model to generate a restoration digital form matched with the preparation body; in the model training process, impression information of a cut part is used as model input, and a three-dimensional digital form of a repaired false tooth prosthesis is used as a learning target; and measuring the difference between the output of the network model and impression information by defining an energy function. Compared with the prior art, the method has the advantages that the digital denture prosthesis with highly accurate model natural tooth morphological characteristics can be designed and produced, and the efficiency and the accuracy are improved.

Provided is at least one of a sintered body having gradations of translucency and a color tone and being capable of providing a visual impression close to that of natural teeth and a calcined body that provides such a sintered body. The calcined body and the sintered body are respectively a calcined body of zirconia and a sintered body of zirconia that have less warpage even after being subjected to heat treatment such as sintering or calcination. The sintered body comprises zirconia, wherein the zirconia contains (i) stabilizing element-containing zirconia or (ii) zirconia containing stabilizing element-containing zirconia and a coloring element, the sintered body has three or more regions stacked in a layered manner, two adjacent regions among the regions differ from each other in at least one of stabilizing element content and coloring element content, and a difference between the stabilizing element content in a first region located at one end among the stacked regions and the stabilizing element content in a second region located at the other end is 2.0 mol% or less.

A method for manufacturing a splint or surgical guide for the implantation of at least one dental implant, relating to a part of a guided oral surgery process by which at least one implant is placed or implanted in a patient's jaw to replace the function of one or more natural teeth. The manufacturing method is implemented by a computer program. The object is to improve the implant placement process in an optimal and minimally invasive, as well as more simplified way.

There is provided a layered body that has gradations in translucency and color allowing the layered body to give an impression similar to that of natural teeth and with which the chipping of the surface layer (layer closer to the incisal edge of the dental restoration) can be reduced.The layered body comprises a surface layer containing zirconia containing at least one stabilizing element and a composition-gradient layer composed of two or more unit layers. The unit layers each contain at least one coloring element and zirconia containing at least one stabilizing element, and the composition-gradient layer is constructed as a result of the unit layers being stacked in such a manner that the amount of the stabilizing element in the zirconia containing at least one stabilizing element contained in the composition-gradient layer remains unchanged or decreases from the surface layer toward the surface of the layered body opposite the surface layer. The amount of the stabilizing element in the zirconia containing at least one stabilizing element contained in the surface layer is smaller than the amount of the stabilizing element in the zirconia containing at least one stabilizing element contained in a first composition-gradient layer, which is one of the unit layers constituting the composition-gradient layer and is adjacent to the surface layer.

The application discloses a Gothic arch retaining device for natural dentition and a manufacturing method of the device. The device comprises: a maxillary retaining splint comprising an inner side and an outer side formed around the maxillary natural dentition, the maxillary retaining splint further comprising a plurality of retaining connecting parts extended from the inner side and located in the same horizontal plane; a mandibular retaining splint comprising an inner side and an outer side formed around the mandibular natural dentition, the mandibular retaining splint further comprising a plurality of retaining connecting parts extended from the inner side and located in the same horizontal plane; a maxillary Gothic arch having a plurality of retaining pins for connecting with the plurality of retaining connecting parts of the maxillary retaining splint to determine the position of the maxillary Gothic arch; and a mandibular Gothic arch having a plurality of retaining pins for connecting with the plurality of retaining connecting parts of the mandibular retaining splint to determine the position of the mandibular Gothic arch. The Gothic arch can be installed, fixed and used on the natural dentition.

To provide a method for making changes in contrast or intensity of color in a porous molding (and / or sintered body thereof) itself closer to those of a natural tooth, and making the porous molding (and / or sintered body thereof) itself have an external appearance closer to a natural tooth.SOLUTION: A method for impregnating impregnation solution containing a metal element and a solvent into a porous molding for dentistry cutting includes a contact step of bringing the impregnation solution containing the metal element and the solvent in contact with a front layer surface of at least one of the porous molding for dentistry cutting to form one or more contact parts 3. In the case where a first virtual line and a second virtual line orthogonal to the first virtual line are defined on the front layer surface to which the impregnation solution contacts, the impregnation solution is brought in contact to form one or more contact parts 3 such that a non-contact part 4 to which the impregnation solution does not contact is present on at least one side of the first virtual line, and the non-contact part 4 to which the impregnation solution does not contact is present on at least one side of the second virtual line, in the contact step.SELECTED DRAWING: Figure 2

The invention discloses a visual bionic dental pulp chip based on a microfluidic device, and a preparation method and application thereof, and belongs to the technical field of biomedicine. The visual bionic dental pulp chip comprises a micro-fluidic chip and a 3D cell reaction unit arranged on the micro-fluidic chip, a perfusion channel, a tube cavity and a liquid storage tank are arranged on the micro-fluidic chip; the 3D cell reaction unit comprises a light-cured gel coating which is coated at the bottom of the liquid storage tank and carries dentin matrix particles, and a bionic dental pulp tissue arranged on the surface of the gel coating. The invention discloses a preparation method and application of the visual bionic dental pulp chip. Based on the principle of organ chips, the micro-fluidic device is introduced into the construction of the bionic dental pulp chip, and the ecological niche of natural dental pulp tissue is simulated in vitro to the greatest extent.

Disclosed are systems and methods for a computerized framework for automated ceramic inkjet printing in dental restoration manufacturing. The disclosed ceramic inkjet mesh printing for dental restorations combines precision digital control with ceramic materials to create highly accurate and aesthetically pleasing dental prosthetics. The disclosed mechanisms utilize specialized printheads designed to deposit precise amounts of ceramic materials onto dental substrates, enabling the creation of detailed color gradients and natural-looking surfaces that closely mimic 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 application discloses a crown-bridge prosthesis, which comprises a bridge body and two retention crowns, the bridge body is arranged between the two retention crowns, the top of each retention crown is provided with a retention groove, the front surface of each retention crown is provided with a positioning channel, the top of the positioning channel is throughly arranged, the positioning channel is communicated with the retention groove, an adapter is arranged in the retention groove, the front surface of the adapter is provided with a through hole, a center block is arranged in the through hole, the outer wall of the center block is provided with a clamping groove, the center block is movably clamped in the positioning channel, and a plurality of spring telescopic structures are uniformly arranged on the outer wall of the center block in a ring shape. The crown-bridge prosthesis is connected with abutments or implant abutments through the retention crowns. When a patient chews, the occlusal force is first applied to the bridge body, the force is transmitted to the center block of the adapter through the retention protrusions on the two sides of the bridge body, when the occlusal force is applied, the spring telescopic structures can absorb part of the force, reduce the impact on the natural teeth and the implant, disperse the stress, and avoid stress concentration.

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.

Disclosed are systems and methods of a decision intelligence (DI)-based computerized framework that automatically and / or dynamically implements a color algorithm for performing staining and glazing dental restorations. The framework operates by leveraging determined color variations through AI / ML-based analysis that generate detailed color maps, which can be translated into precise printing instructions controlling the mixture and layering of dental-grade glazing materials. A printing system can employ multiple print heads with varying base colors and opacity levels to create microscopic color gradients and translucency effects matching natural tooth enamel. The disclosed automated processing applies personalized color patterns in microscopically thin layers, ensuring consistent glaze thickness while replicating regional variations across the tooth surface. Such approach eliminates manual glazing variability while achieving superior customization compared to traditional pre-set patterns, resulting in dental restorations that integrate seamlessly with existing teeth.

The invention belongs to the technical field of biomedical materials, and discloses a natural tooth composite material bone grafting scaffold for alveolar bone repair and a design and preparation method thereof. The method comprises the following steps: collecting orthodontic teeth, impacted teeth, multiple teeth, loose teeth and other natural teeth extracted in oral medical treatment, and performing technical treatment to obtain raw material powder; ball-milling and mixing the bioactive glass powder, the carbon-based material powder and the natural dental powder to obtain mixed powder; the mixed powder is used as a raw material, and the bone grafting scaffold is obtained through computer aided design and digital light processing technology 3D printing; and modifying the surface of the 3D printing bracket by using the polydopamine-carbon-based material composite coating to obtain the natural tooth composite material bone grafting bracket. The natural tooth composite material bone grafting scaffold obtained by the invention has good mechanical property, controllable degradation property and antibacterial property, and has good biocompatibility and osteogenesis efficiency.

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.

Apparatus and processes by providing for gradually interleaving layers of zirconia powders having different concentrations of colorants and yttria to obtain color and translucency gradients that more closely mimic natural teeth, in which apparatus includes a comb having a multiplicity of tines that is extended vertically into a mold configured to hold at least two layers of differently constituted powders, such that adjacent layers of the powders form an interface. The comb is reciprocated to create a textured surface pattern on a topmost layer of powder and additionally may be used to penetrate an interface between adjacent layers, thereby redistributing the particles near the interface.

This image processing method is for displaying a dental plaque region on the basis of an image obtained by photographing teeth and dental plaque undergoing a fluorescence reaction as a result of being irradiated with light including a wavelength band of blue light, said method comprising: detecting a natural tooth region from the region of the teeth on the basis of the image (S201-S206); detecting plaque regions on the basis of the image (S207); and displaying a plaque region exclusively in the natural tooth region (S105). For example, the image processing method may involve, in detecting a natural tooth region, detecting a first region that is (i) a region, among all pixel regions of the image, having a luminance value equal to or greater than a predetermined first threshold or (ii) a region, among all pixel regions of the image, having a green pixel value equal to or greater than a predetermined second threshold, and detecting a natural tooth region on the basis of the first region.

The invention discloses a low-temperature preparation method of a biomimetic mineralized dental material, which comprises the following steps of: (1) adding a microorganism sporosarcina pasteurii capable of generating calcium carbonate into a microorganism fermentation liquid capable of generating protein fibers for co-culture to obtain a fibrous biofilm containing the sporosarcina pasteurii; (2) adding the biological membrane into a mineralizing solution for biological mineralization; and (3) after mineralization is finished, performing high-temperature sterilization and drying on the material to obtain the biomimetic mineralized dental material. By adopting an in-situ mineralization technology and combining microbial co-culture with a biomineralization assembly technology, the preparation of the super-hard and super-tough bionic ceramic dental material can be realized under the near room temperature condition of 30 DEG C, and the super-high energy consumption of a traditional high-temperature sintering technology is avoided; the Vickers hardness HV value of the dental material prepared by the method is about 300 and is close to that of natural enamel, and the tensile toughness value of the dental material is 18 MJ / m < 3 > and is 10 times of that of natural teeth.

The invention relates to glasses and glass ceramics having a high content of cerium and tin, comprising the following components: # imgabs0 # and which are particularly suitable for the production of dental prostheses having fluorescent properties substantially consistent with those of natural teeth.

1. The name of the design product: oral natural tooth color measurement colorimeter. 2. The use of the design product: for detecting tooth color. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The invention relates to a digital design method and device for a dental restoration and a storage medium. The method comprises the following steps: S1, respectively obtaining point clouds of enamel, dentin and dental pulp of a tooth to be restored and a reference tooth thereof by using a CBCT (Cone Beam Computed Tomography) image; s2, determining a tooth body center point of the reference tooth based on tooth enamel, dentin and tooth tip positions of dental pulp of the reference tooth, and determining a tooth body center point of the to-be-repaired tooth in combination with a first volume ratio of the reference tooth to the to-be-repaired tooth; s3, respectively making infinitely long cones by taking the central point of the tooth body as the vertex of the to-be-repaired tooth and the reference tooth to obtain volume coefficients of dentin and enamel of the reference tooth and the to-be-repaired tooth; and S4, gradually enlarging the vertex angle of the cone, and reconstructing enamel and dentin of the to-be-repaired tooth layer by layer. Compared with the prior art, the method has the advantages that the complex geometrical morphology and biomechanical characteristics of enamel and dentin are accurately simulated based on CBCT images, the weights of all levels are set, and bionic repair better conforming to natural teeth is achieved.

The application discloses a detachable digital guide plate for assisting fiber post and resin core repair and a manufacturing method. The detachable digital guide plate comprises a base guide plate and a post core guide plate assembled through a mortise and tenon joint structure. The guide plate is manufactured by using digital technology, fully considering the complexity and individual differences of the root canal morphology of natural teeth, and setting the post core position with the expected repair effect as the target, effectively assisting the accurate positioning and forming of the post core in the tooth defect repair, the fiber post bonding and the resin nucleation, especially suitable for the complex repair treatment of the multi-abutment row joint crown or fixed bridge. Not only can the guide plate assist the accurate positioning and bonding of the fiber post, but also can control the nucleation space position and shape of each post core, effectively assist the multi-abutment to obtain the common positioning channel, reduce the clinical operation difficulty, improve the operation accuracy and the quality of the oral repair treatment, and reduce the tooth preparation time of the clinician at the chair.

The invention relates to the technical field of dental implant detection, in particular to a dental implant abutment performance detection device which comprises a fixing frame, the fixing frame is in a U shape, a fixing rod is fixedly mounted in a U-shaped groove in the fixing frame, two positioning tables are arranged in the U-shaped groove in the fixing frame, mounting grooves are formed in the two positioning tables, and the mounting grooves are communicated with the fixing rod. A fixing shaft is fixedly mounted in the mounting groove in the positioning table close to the bottom end of the fixing frame, and a rotating shaft is rotationally mounted in the mounting groove in the positioning table at the top end of the fixing frame; when the driving gear is controlled to rotate, the teeth on the driving gear stir the lifting toothed plate to move upwards, at the moment, the mounting tank close to the top end of the fixing frame is pulled to move upwards, and after the teeth on the driving gear are separated from the lifting toothed plate, the mounting tank moves downwards and collides with the other mounting tank, so that the mounting tank is prevented from being damaged. Implanted teeth on the two installation tanks are made to collide with the natural tooth model, and occlusal collision in the chewing process is simulated.

The invention discloses a fixed clamp holder and a tooth neck subgingival defect repair auxiliary system, and belongs to the technical field of medical instruments, the fixed clamp holder comprises a handle and an operation head located at the end of the handle, the operation head is provided with an operation mechanism, the operation mechanism comprises a clamping part rotationally connected to the operation head and an adjusting part used for rotating the clamping part, and the clamping part is provided with a clamping groove. The clamping part comprises two clamping arms, and the included angle between the two clamping arms is adjustable. The bending degree of the forming piece can be changed by changing the opening angle of the two clamping arms, so that the forming piece is preformed, the shape of the forming face is easier to control, the forming face is more accurately attached to the radian of natural teeth, the two clamping arms can be integrally rotated through the adjusting part, the orientations of the two clamping arms are changed, and the repairing requirements of different orientations are met; and the adjacent surface contour recovery effect is ensured.