27 results about "Occlusal contact" patented technology

The invention relates to the technical field of dental medicine, in particular to a dental arch model occlusion relation calculation method and device, equipment and a storage medium. The method comprises the following steps: acquiring a dental three-dimensional model of a patient; executing gravity settling positioning operation, fixing the upper jaw model as a static rigid body, releasing translation and rotation freedom degrees of the lower jaw model, and applying gravity action in the normal direction of the occlusal surface; micro-vibration self-adaptive optimization operation is executed, periodic disturbing force dominated by the normal direction is applied to the lower jaw model, and the teeth are driven to generate tangential slippage behaviors along the occlusal surface; identifying an occlusal contact point set, calculating a normal stress value of each contact point, and iteratively adjusting a pose parameter of the lower jaw model; and based on the optimized mandible pose, simulating a mandible motion path, identifying interference points through a continuous collision detection algorithm, and calling back the contact mechanical equilibrium optimization operation to perform closed-loop correction so as to determine the occlusal relationship. According to the method, the occlusion alignment relation better meeting the biomechanics and occlusion function requirements is calculated in an automatic auxiliary mode.

The application relates to the field of oral medicine diagnosis and discloses an AI-enhanced real-time occlusion detection system based on intraoral images, which comprises a multi-source intraoral image acquisition module, which is used for acquiring dynamic oral image data through a high-definition oral endoscope, recording the three-dimensional structure of a tooth surface in combination with a laser scanning device, and collecting the force distribution of an occlusion contact point through a pressure sensor array; the multi-source intraoral image acquisition module comprises a time stamp synchronization unit, which performs multi-source synchronization on the oral image frame sequence and the occlusion force distribution data by using a unified time mark; through the multi-source intraoral image acquisition module, the synchronous acquisition of dynamic images, three-dimensional structure data and occlusion force distribution is realized, and the time sequence consistency of the data is ensured through the time stamp mark. Compared with the acquisition mode of a traditional single data source, multi-source acquisition can comprehensively record the dynamic characteristics in the occlusion process, provide rich and accurate input for subsequent AI analysis, and avoid data omission or acquisition deviation.

Computer-implemented data processing system for the automatic determination of a relative positional relationship between the upper and lower jaw, in particular a maximum intercuspal position (MIP), comprising: > a) an input interface (110) configured to receive > at least two separately captured three-dimensional dental > geometries of an upper and a lower jaw; > > b) a pre-registration module (120) configured to determine > an initial spatial assignment of the individual jaw geometries > to each other based on geometric features of the dental arches; > > c) a fine-registration module (130) configured for iterative > refinement of the spatial assignment by minimizing a > distance or correspondence measure between corresponding > surface areas; > > d) a contact optimization module (140) configured to determine > an optimal relative position by maximizing the number or > quality of occlusal contact points while simultaneously minimizing > penetrations between the dental geometries;> > e\) an output interface (150) configured to provide > the specified relative positional relationship as a transformation matrix, > contact point list and / or registered model pair for downstream > analysis, simulation or manufacturing systems.;

The application provides a combined device of an accessory and a shell-shaped appliance and a manufacturing method thereof, the accessory comprises a tooth accessory fixed on a tooth surface and a dental model accessory fixed on a dental model, the tooth accessory is smaller than the dental model accessory, the occlusal surface of the dental model accessory forms different degrees of occlusal contact with the opposite teeth, so that the shell-shaped appliance generated based on the dental model with the dental model accessory fixed thereon can enhance the seating by using the occlusal force, there is a gap between the occlusal surface of the dental model accessory and the introduction surface of the tooth accessory, so that there is a gap between the accessory cavity of the shell-shaped appliance and the tooth accessory, the appliance has a larger surface area and better elastic performance in the accessory part, which is beneficial to enhance the seating and express the correction force, in addition, the occlusal surface of the dental model accessory can also be designed to have the functions of lifting the occlusion and leading the lower jaw.

The application discloses a kind of based on photosensitive bioceramics deciduous tooth additive manufacturing forming process, it is related to ceramic deciduous tooth manufacturing technical field, comprising the following steps: using oral scanner to collect children's dental three-dimensional data, generate deciduous tooth restoration three-dimensional data model and export STL format deciduous tooth repair model;Using photosensitive liquid bioceramic composite material, through DLP photocuring 3D printing into initial blank, again through blue light three-stage resolidification and get blank body.In the process, the morphological characteristics of adjacent healthy deciduous teeth can be accurately extracted, and the crown height correction coefficient is automatically matched according to the age of the child, effectively compensating for the size deviation of the unerupted deciduous teeth, ensuring that the size error of the restoration is small, adjusting the occlusal surface morphology of the restoration according to the actual data of the teeth at the same time, making the occlusal contact area ratio higher, and reserving occlusal buffer space to avoid excessive local stress, significantly improving the mastication comfort and durability of the restoration.

The invention provides an occlusion induction appliance for a tooth replacement period, an orthodontic system for guiding jaw growth in the tooth replacement period and a design method of the orthodontic system. The occlusion induction appliance for the tooth replacement period comprises an upper jaw tooth socket and a lower jaw tooth socket, a lower jaw brace; the intermaxillary connecting body is positioned between the occlusal surfaces of the back tooth areas of the upper jaw tooth socket and the lower jaw tooth socket; wherein the upper jaw tooth socket and the lower jaw tooth socket form a rigid integral structure which cannot move relatively on an occlusal surface through the intermaxillary connector; the intermaxillary connecting body has a preset thickness so as to open occlusion contact of upper and lower anterior teeth in a wearing state, and the intermaxillary connecting body is configured to lock the lower jaw tooth socket at a preset three-dimensional space position relative to the upper jaw tooth socket body; when the occlusion induction appliance for the tooth replacement period is worn, the upper dentition and the lower dentition serve as integral interactive anchorage, and the occlusion force is converted into the orthodontic force acting on the dentition or the jaw bone.

The invention provides an oral cavity scanning data occlusal contact point analysis method adopting deep learning, which comprises the following steps: realizing point cloud data preprocessing through adaptive outlier filtering and rigid registration, modeling a deformation sensitive area in combination with tooth surface curvature and normal vector change, and extracting geometric and deformation semantic features by using a lightweight deep learning structure; a feature decoupling and attention gating mechanism is adopted to enhance the feature resolution, and then a prior motion topological graph and graph convolution propagation are constructed to improve the time sequence and physiological consistency of candidate contact points; three-dimensional coordinates, intensity probability and tooth position labels of the contact points are output through a multi-scale regression model, a multi-threshold fusion mechanism is used for assisting result verification, the precision and clinical applicability of occlusal contact point recognition are improved, and the method has the advantages of high noise suppression, high structural resolution and dynamic adjustment capability.

A laser positioning device for dental occlusal centers, belonging to the field of denture manufacturing technology, addresses the problems of cumbersome operation and low efficiency associated with using an occlusal center measuring ruler to locate occlusal contact points. It includes a base platform, an optical axis vertically fixed to the base platform via a locking seat, a lower bracket slidably mounted on the optical axis, a first elongated hole along the length of the lower bracket, and a second elongated hole along the length of the upper bracket. A locking screw passes through both the first and second elongated holes and connects to a back nut. A laser emitter is vertically fixed to the upper bracket. This invention uses a laser emitter to project a fine laser spot downwards, which is used to position the tooth at a preset alveolar ridge. The center of the tooth can be found visually based on the laser spot, eliminating the need to move the pointer as required by using an occlusal center measuring ruler, thus greatly improving the efficiency of denture fabrication and adjustment.

The invention discloses a medical electronic occlusal dynamometer and a data analysis system, and relates to the technical field of medical instruments, and the medical electronic occlusal dynamometer comprises a handheld force measurement housing, a pressure signal scanning head and a film type sensor, the data analysis system comprises a data acquisition unit, an occlusal force spatial and temporal distribution calculation unit, an occlusal contact positioning unit, an occlusal force dynamic trajectory tracking unit and a result output unit. The occlusal force data of a patient in the occlusal test process are obtained through the film type pressure sensor, the occlusal force data are judged one by one to obtain effective occlusal force values, data source coordinates of the effective occlusal force values are correspondingly obtained, and an occlusal contact distribution diagram is obtained; meanwhile, ideal occlusal contact feature extraction is conducted based on the oral cavity internal structure three-dimensional space model, space coordinates of ideal occlusal contacts are obtained, and an ideal occlusal contact set is compared with effective occlusal force values on the occlusal contact distribution diagram one by one in position so as to judge whether the occlusal force of the patient reaches the standard or not.

The utility model provides an appliance for treating class II high angle mandibular retraction, which comprises an intraoral device and an extraoral device, the extraoral device comprises an improved chin pocket and a head anchorage, the improved chin pocket is used for contacting with a mandibular to be corrected, a connecting rod is arranged on the improved chin pocket, a support is arranged on the head anchorage, a plurality of traction hooks are arranged on the support, and the traction hooks are connected with the connecting rod. The connecting rod is connected with a traction hook through an elastic traction rubber band; the intraoral device is a jaw pad arranged at the rear teeth of the lower jaw; the jaw pad forms a fulcrum at the rear teeth of the lower jaw, the head anchorage generates forward traction force to the improved chin pocket through the elastic traction rubber band and the traction hook, the jaw pad is matched with chewing of a patient, the effect of pressing the rear teeth is generated when the upper jaw and the lower jaw are in occlusion contact, and the lower jaw is guided to grow forwards and upwards to treat the rear shrinkage face type of the lower jaw. The effects of lowering back teeth, improving the high angle trend and correcting the forward leaning posture of the cranium and the neck can be achieved, the treatment period is greatly shortened, and the treatment effect is greatly improved.

The invention discloses an accessory adjusting method and device of an orthodontic appliance, electronic equipment and a computer readable storage medium. The method comprises the following steps: identifying a rotation reference point of a lower jawbone of a user and a current position of a target tooth of the user; determining a first rotation radius of the target tooth according to the current position and the lower jawbone rotation reference point; the standard thickness of the orthodontic appliance is obtained, and the lower jawbone rotation angle of the user is determined according to the first rotation radius and the standard thickness; according to the rotation angle of the lower jawbone, the correction amount of the orthodontic appliance on to-be-adjusted teeth is determined, and the to-be-adjusted teeth are teeth except the target teeth in the oral cavity of the user; the height of the accessory corresponding to the tooth to be adjusted is adjusted based on the orthodontic amount, so that the accessory height of the orthodontic appliance is matched with the orthodontic amount, passive lowering of the second molar due to point contact can be prevented, occlusion alignment of the upper jaw and the lower jaw is improved, and stable occlusion contact of the teeth of the upper jaw and the lower jaw in the process of wearing the orthodontic appliance is ensured.

The embodiment of the present disclosure provides an acquisition method of a dental retainer, and relates to the technical field of retainer manufacturing, and comprises the following steps: generating a digital three-dimensional model of a patient's dental arch, and identifying individual characteristics such as maxillary or protruding teeth, presence of deciduous teeth or conical teeth, and occlusal contact points, and the edge height and / or occlusal area thickness of the retainer three-dimensional digital model can be correspondingly personalized adjusted, so as to be 3D printed to obtain a dental retainer. Since the whole process is digitalized, a plaster model is not needed, thereby eliminating the step of trimming and grinding. Since dust pollution is completely eliminated, the manufacturing time is shortened, and the breakage and rework caused by excessive cutting are avoided, and the retainer matched with different needs of patients can be manufactured more efficiently.

The embodiment of the invention discloses a model occlusion optimization method and device, computer equipment and a storage medium. The method comprises the steps that an oral cavity model of a target object is acquired, the oral cavity model comprises a first single-jaw model and a second single-jaw model, and each of the first single-jaw model and the second single-jaw model comprises an occlusion contact area; generating a second target single-jaw model of the second single-jaw model under the current pose, wherein the second target single-jaw model simulates elastic deformation generated when the second single-jaw model occludes under the current pose; determining the vertex weight of each jaw vertex in the second single-jaw model according to the occlusal contact area and the vertex collision relationship among the first single-jaw model and the second single-jaw model; and based on a preset occlusion optimization algorithm, updating the pose of the second single-jaw model according to the weight of each vertex and the second target single-jaw model until the occlusion optimization algorithm meets a preset convergence condition, and outputting an optimized oral cavity model. By implementing the method provided by the embodiment of the invention, the real alignment result of the upper and lower jaws can be obtained.

The invention discloses a jaw guard plate design method and device, a storage medium and a program product, relates to the technical field of jaw guard plate design, and aims to improve the design accuracy of a jaw guard plate buffer layer. The method comprises the following steps: extracting a palate profile curve from a smooth palate three-dimensional digital model of a patient; inwards shifting the palate profile curve by a preset safety distance to generate a jaw guard plate basic boundary; calculating the normal contact force distribution of the palate side tooth surface based on the occlusal contact data of the patient at the maximum apical interlacing position; projecting the normal contact force distribution to the surface of the palate model to form a palate pressure distribution diagram; identifying a high-pressure region with a pressure value greater than a preset threshold value in the palate pressure distribution diagram; establishing a local thickness control vector along the normal direction of the palate surface by taking the geometric center of the high-pressure area as a reference point; mapping the pressure value corresponding to each local thickness control vector into a local thickness increment by adopting a piecewise linear function; and superposing the local thickness increments to a preset basic thickness to generate a jaw guard plate model.

Embodiments of the present application disclose a model occlusion optimization method and device, computer equipment and a storage medium. The method comprises: obtaining a target object oral model, the oral model comprising a first single jaw model and a second single jaw model, the first single jaw model and the second single jaw model each comprising an occlusal contact area; generating a second target single jaw model of the second single jaw model in a current pose, the second target single jaw model simulating elastic deformation occurring when the second single jaw model is occluded in the current pose; determining vertex weights of each jaw vertex in the second single jaw model according to vertex collision relationships between the occlusal contact area, the first single jaw model and the second single jaw model; updating the pose of the second single jaw model according to the vertex weights and the second target single jaw model based on a preset occlusion optimization algorithm, until the occlusion optimization algorithm meets a preset convergence condition, and outputting an optimized oral model. By implementing the method of the embodiments of the present application, a real alignment result of the upper and lower jaws can be obtained.

The application provides a bite contact point analysis method for oral scanning data using deep learning, point cloud data preprocessing is realized through adaptive outlier filtering and rigid registration, a deformation sensitive area is modeled in combination with tooth surface curvature and normal vector change, and lightweight deep learning structure is used to extract geometric and deformation semantic features; feature decoupling and attention gate mechanism are used to enhance feature resolution, and a prior motion topology graph and graph convolution propagation are reconstructed to improve the timing and physiological consistency of candidate contact points; a multi-scale regression model is used to output the three-dimensional coordinates, intensity probability and tooth position label of the contact points, and a multi-threshold fusion mechanism is used to assist result verification, the application improves the precision and clinical applicability of bite contact point recognition, and has strong noise suppression, high structure resolution and dynamic adjustment capability.

The application discloses an orthodontic appliance accessory adjustment method and device, electronic equipment and a computer readable storage medium, comprising: identifying a user's mandibular rotation reference point and the current position of the user's target teeth; determining the first rotation radius of the target teeth according to the current position and the mandibular rotation reference point; obtaining the standard thickness of the orthodontic appliance, and determining the mandibular rotation angle of the user according to the first rotation radius and the standard thickness; determining the correction amount of the orthodontic appliance on the teeth to be adjusted according to the mandibular rotation angle, the teeth to be adjusted being the teeth in the user's oral cavity other than the target teeth; and adjusting the height of the accessory corresponding to the teeth to be adjusted based on the correction amount, thereby achieving the adaptation of the accessory height of the orthodontic appliance and the correction amount, preventing the second molar from being passively pressed down due to point contact, improving the upper and lower jaw bite alignment, and ensuring that the upper and lower jaw teeth can stably bite and contact during the process of wearing the orthodontic appliance.

The invention relates to the technical field of oral implant repair and digital medical treatment, in particular to a false tooth occlusal surface form intelligent optimization method fused with occlusal dynamics simulation. The technical problem that the function stability of a false tooth form generated in the prior art is insufficient is solved. The method comprises the following steps: determining a sensitivity coefficient of a grid vertex of a false tooth based on jaw anatomical data and implant positioning information; based on the virtual occlusion movement track, performing dynamic occlusion simulation on the false tooth and the jaw tooth model, and introducing random perturbation of an occlusion contact point in the simulation process; generating an accumulated risk field of the occlusal surface of the false tooth according to the dynamic occlusal simulation; and performing deformation optimization on the initial grid model of the false tooth based on the cumulative risk field in combination with the occlusion function constraint of the false tooth and the jaw tooth model, and determining an optimized false tooth grid model. The method is used for a false tooth shape optimization scene.

The utility model discloses dental instrument, including first shell body and convex setting in the first shell body rear tooth area side surface first protruding part, and second shell body and convex setting in the second shell body rear tooth area side surface second protruding part, first protruding part convex setting in the first shell body rear tooth area buccal side and / or lingual side, and first protruding part includes first bottom and the first occlusal surface of inclination setting, second protruding part convex setting in the second shell body rear tooth area buccal side and / or lingual side, and second protruding part includes second bottom and the second occlusal surface of inclination setting, when wearing dental instrument, the first occlusal surface and the second occlusal surface can occlusal contact and interact, and the second occlusal surface slides along the first occlusal surface, and the second shell body is moved in the shape of losing to the first shell body upwards, and when reaching the stable occlusion state, the relative position of the upper and lower jaw of patient is adjusted to the target position, and the first occlusal surface and the second occlusal surface are parallel to each other.

Dental aligners and systems for producing controlled tooth-moving forces. A dental aligner may include a first tooth receiving cavity with a wall configured to resiliently apply a first force to a first tooth in accordance with a treatment plan. The first tooth receiving cavity may include an occlusal inner surface forming a first configuration of cusps and nadirs shaped to conform to an occlusal surface of the first tooth, and an occlusal outer surface forming a second configuration of cusps and nadirs. One or more occlusal contact features protruding from the outer occlusal surface may redirect a bite force on the first tooth that is produced by a person wearing the dental aligner toward a same or a complementary direction as the first force in accordance with the treatment.

The invention provides a preparation method of an oral three-dimensional occlusion induction type high-angle bone face type appliance, which comprises the following steps: acquiring upper and lower jaw dentition digital models of a child patient, constructing upper and lower jaw tooth digital models of the child patient after occlusion reconstruction of the upper and lower jaws, and then designing a back tooth occlusion relation and a maximum occlusion contact mode after occlusion reconstruction, a design scheme of the invisible tooth socket containing the gap part is obtained, and a design scheme of the flexible filler is constructed. The invisible tooth socket containing the gap part prepared according to the design scheme can be independently used and can also be matched with flexible filler for use. The orthodontic appliance can solve the technical problem that the existing orthodontic appliance is difficult to simultaneously and effectively control the perpendicularity and inclination of front and rear teeth, adjust occlusion induction and tooth uniformity and adjust the inclination of an occlusion plane during deciduous tooth shedding and permanent tooth eruption of a child patient.

The application discloses a failure restoration retreatment decision method based on dynamic occlusion analysis, which constructs a four-dimensional virtual biomechanical model containing patient anatomical structure and dynamic function through multi-modal data fusion, can embed patient real three-dimensional mandibular movement trajectory to simulate functional movement, break through the static analysis blind area, and reduce the dynamic interference missed diagnosis rate; relying on the quantitative indexes and threshold values of the occlusal contact displacement amount, occlusal contact distribution symmetry and occlusal adjustment amount of the maximum intercuspidation and centric relation position, replacing the doctor's experience judgment, improving the objectivity, repeatability and accuracy of the failure restoration retreatment decision, avoiding excessive or insufficient adjustment and grinding; through virtual pre-adjustment, the treatment effect is preformed, the irreversible operation risk is avoided, and the number of patient rechecks and trial and error cost are reduced; meanwhile, the four-dimensional virtual model can be connected to the design and production of the final restoration, and the accuracy, safety and efficiency of the failure restoration retreatment are improved.

The invention discloses a deciduous tooth additive manufacturing forming process based on photosensitive biological ceramics, and relates to the technical field of ceramic deciduous tooth manufacturing, and the process comprises the following steps: collecting dental three-dimensional data of a child patient by adopting an oral cavity scanner, generating a deciduous tooth restoration three-dimensional data model, and exporting an STL format deciduous tooth restoration model; a photosensitive liquid biological ceramic composite material is subjected to DLP photocuring 3D printing to form an initial blank, and then a blank body is obtained through blue light three-stage recuring. According to the process, the morphological characteristics of adjacent healthy deciduous teeth can be accurately extracted, a dental crown height correction coefficient is automatically matched according to the age of a child patient, the size deviation of incomplete eruption of the deciduous teeth is effectively compensated, the small size error of the prosthesis is ensured, meanwhile, the shape of the occlusal surface of the prosthesis is adjusted according to the actual data of the jaw teeth, and the occlusal contact area is relatively high; and an occlusion buffer space is reserved, so that overlarge local stress is avoided, and the chewing comfort and the durability of the prosthesis are remarkably improved.

The invention relates to the technical field of digital oral diagnosis and treatment, and discloses an intelligent diagnosis device and method for recording and analyzing oral occlusion, the device comprises an occlusion recording module, a first color developing agent, a second color developing agent and an image analysis module, the occlusion recording module is composed of an upper-layer sheet, a medical silica gel layer and a lower-layer sheet which are arranged in a separable manner from top to bottom; wherein the outer surfaces of the upper sheet and the lower sheet are respectively provided with a super-hydrophobic coating. Before occlusion, color developing agents with different colors are coated on the surfaces of corresponding coatings; and after occlusion separation, upper and lower tooth occlusion color marks are formed. The image analysis module obtains a double-sided image, identifies a positioning mark in a medical silica gel layer, performs spatial registration on upper and lower layer color marks, and establishes a corresponding relation of occlusion contact points; and then extracting an average gray value and a pixel area of each point, substituting the average gray value and the pixel area into a pre-stored gray and pressure conversion function, and calculating relative occlusion pressure information of each point. The method corresponds to the device. Synchronous and quantitative recording and analysis of occlusion contact of the upper jaw and the lower jaw are achieved.

This invention provides an occlusal guiding appliance for the mixed dentition period, an orthodontic system for guiding jawbone growth during the mixed dentition period, and a design method thereof. The occlusal guiding appliance for the mixed dentition period includes: a maxillary brace; a mandibular brace; and an intermaxillary connector located between the occlusal surfaces of the maxillary and mandibular braces in the posterior region. The maxillary and mandibular braces form a rigid, immovable integral structure at the occlusal surfaces via the intermaxillary connector. The intermaxillary connector has a preset thickness to open the occlusal contact between the upper and lower anterior teeth when worn, and is configured to lock the mandibular brace at a preset three-dimensional spatial position relative to the maxillary brace body. This allows the occlusal guiding appliance for the mixed dentition period to use the upper and lower dentitions as an integral interactive anchor when worn, converting occlusal force into orthodontic force acting on the dentition or jawbone.

The embodiment of the invention provides a method for acquiring a tooth retainer, which relates to the technical field of retainer manufacturing and comprises the following steps: generating a digital three-dimensional model of a tooth jaw of a patient, and identifying individual characteristics such as an upper jaw or tooth protrusion condition, a deciduous tooth or conical tooth existence condition and an occlusion contact point according to the digital three-dimensional model; and the edge height and / or the occlusal area thickness of the three-dimensional digital model of the retainer can be correspondingly and individually adjusted, so that 3D printing forming is facilitated, and the tooth retainer is obtained. Due to the fact that the whole process is digitized, a plaster model is not needed, the step of adjusting and grinding is omitted, dust pollution is thoroughly eliminated, the manufacturing time is shortened, breakage and reworking caused by excessive cutting are avoided, and the matched retainers can be manufactured with higher efficiency for patients with different requirements.

The present application relates to the field of oral implant restoration and digital medical technology, and particularly relates to a denture occlusal surface form intelligent optimization method fusing occlusal dynamics simulation. The method solves the technical problem of insufficient function stability of the denture form generated by the prior art. The method comprises: determining the sensitivity coefficient of the grid vertex of the denture based on the jawbone anatomical data and the implant positioning information; performing dynamic occlusal simulation on the denture and the opposite tooth model based on the virtual occlusal motion trajectory, and introducing random perturbation to the occlusal contact point during the simulation; generating a cumulative risk field of the denture occlusal surface according to the dynamic occlusal simulation; deforming and optimizing the initial grid model of the denture based on the cumulative risk field and combining the occlusal function constraint of the denture and the opposite tooth model, to determine the optimized denture grid model. The present application is used in the scene of denture form optimization.