44 results about "Tooth Preparations" patented technology

The invention discloses an extruded thread trimming detection method, an extruded thread system and application. The method comprises the following steps: calling an impedance reference template bound with a material and a tap index, synchronously collecting steady-state alternating-current impedance of each chip groove at different depths of a thread, calculating deviation according to a groove position weight, setting two-stage threshold values to generate local or overall abnormal marks, then carrying out partitioned statistics on the continuous interval length and number of the abnormal marks, and finally, carrying out statistical analysis on the continuous interval length and number of the abnormal marks. And obtaining a thread overall quality judgment result. According to the technical scheme, the tooth crest trimming quality can be nondestructively detected in real time in the tooth trimming process on the premise that the machining takt is not affected, batch rework or scrapping caused by later spot check is avoided, and the method is suitable for thread batch production with the high quality requirement.

Embodiments of the present disclosure relate to a method, apparatus, device, and medium for extracting a cervical margin line of a tooth preparation, wherein the method includes: acquiring a three-dimensional digital model of the tooth preparation, and acquiring a candidate two-dimensional digital image corresponding to the three-dimensional digital model; determining a candidate cervical margin line according to the candidate two-dimensional digital image; and obtaining a target cervical margin line by performing error correction processing on the candidate cervical margin line in the three-dimensional digital model.

The invention provides a mechanical arm path planning method and device for anterior tooth preparation, relates to the technical field of tooth preparation path planning, and aims to realize precise tooth preparation operation in a complex oral environment. The method comprises the following steps: constructing an anterior tooth preparation digital model according to oral scanning data of a patient, the anterior tooth preparation digital model representing a target form of a repaired tooth; according to the anterior tooth preparation digital model, a bur motion coordinate system is constructed, and the bur motion coordinate system is used for providing space origin reference for tooth preparation path generation; by taking the geometric parameters of the machine needle and the anatomy of the oral cavity of the patient as constraints and taking the anterior tooth preparation digital model as a starting point, reversely calculating a tooth preparation path of cutting from an original tooth body of an anterior tooth to the anterior tooth preparation digital model under the machine needle motion coordinate system; and converting the tooth preparation path into a mechanical arm control instruction to control a mechanical arm to carry out tooth preparation operation on the original anterior tooth body in the oral cavity of the patient.

The invention relates to a tooth preparation teaching system and method, electronic equipment and a storage medium. The client side is in communication connection with the server side, and the client side comprises a teacher side and a student side; the scanning module is used for acquiring model data of teeth; the workbench is used for packaging the client and enabling the client to communicate with the scanning module; the teacher end is used for configuring teaching information and distributing the teaching information to the student ends; the student end is used for receiving teaching information and calling the scanning module to obtain a tooth preparation front tooth model and a tooth preparation rear tooth model; the server is used for storing teaching information, the tooth model before tooth preparation and the tooth model after tooth preparation, and performing scoring calculation to generate a scoring result; and the scanning module is also used for comparing and calculating the tooth model before tooth preparation and the tooth model after tooth preparation to generate comparison result data. According to the invention, full-process digital management of tooth preparation teaching is realized, and the efficiency of tooth preparation teaching is improved.

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 embodiment of the invention discloses a tooth preparation monitoring method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring a preoperative model and a current tooth preparation model of a target object; a current tooth preparation monitoring mode and a model import result are determined, the model import result indicates whether an import model exists in current tooth preparation monitoring or not, and the import model comprises a formal restoration model or a formal preparation model corresponding to the target object; according to the current tooth preparation monitoring mode and the model import result, two sets of target models are selected from the preoperative model, the current tooth preparation model and the import model for comparison, and a tooth preparation monitoring result is obtained. According to the embodiment of the invention, the tooth preparation monitoring is carried out by comparing the digital models of the target object in different stages, a silicon rubber guide plate is not needed for tooth measurement in the checking process, and the problem of insufficient tooth measurement precision caused by the use of the silicon rubber guide plate for tooth measurement is solved.

The invention discloses an adjustable calibration device and calibration method for assisting tooth preparation, the device comprises a calibration tray, the calibration tray is provided with a common in-place track calibration table, the calibration table is arranged on the calibration tray and can slide along the common in-place track, and the calibration table is also provided with a plurality of calibration tracks; and the calibration rod assembly comprises a fixed rod and a calibration rod which are connected with each other, and the fixed rod is vertically connected to the calibration track. The adjustable calibration device for assisting tooth preparation is simple in structure, easy to manufacture, relatively low in cost and easy to use, and can realize accurate detection of tooth preparation amount through the synergistic effect of the calibration table and the calibration rod assembly, so that insufficient preparation or excessive preparation is avoided; the shaft wall parallelism of multi-tooth preparation can be verified at the same time through combined application of a plurality of calibration tables, the consistency of in-position paths of prostheses is ensured, and the calibration table is suitable for the preparation process of fixed prostheses such as full crown, veneering and inlay restoration and can be well applied to oral medicine and biomedical engineering industries.

A method of installing a fiber post for a post and core dental restoration uses a fiber post system which has a plurality of fiber posts having at least two distinct diameters for the fiber posts and at least two preformed fiber post lengths for the fiber posts. Each fiber post containing a visible depth marker indicative of where the post should be placed above and below root orifice, whereby the fiber post selected is configured to be based upon the root length of the specific tooth obturated, yielding proper post space preparation apically for cementation and coronally for foundational core build up. The resulting implanted post eliminates or minimizes post manipulation during tooth preparation to create a mono-block of core material around the post during cementation and build up resulting in no disruption of either bond during preparation.

The invention provides a digital tooth preparation guide plate based on a tooth preparation body model and a manufacturing method thereof. The digital tooth preparation guide plate is high in precision and replicability, and solves the problems that tooth preparation is poor in precision, depends on experience, is low in efficiency and the like in the prior art. The device structurally comprises a tooth preparation guide plate platform, a speed reduction transmission mechanism, a feeding cam, a transverse translation sliding rail, a longitudinal pressing assembly and a profiling guide needle assembly, wherein the profiling guide needle assembly comprises a guide needle and a support of the guide needle, is consistent with a target prosthesis in shape and is used for guiding a needle path; the mobile phone clamping assembly and the tooth preparation body clamping assembly are used for fixing a tooth preparation body model and preventing displacement; the 3D printing guide plate is manufactured based on the digital model, is attached to the dentition of the patient and is used for intraoral positioning.

The application discloses a kind of generation methods of dental preparation grinding path, it is related to dental prosthetic field, including obtaining to-be-ground tooth point cloud model, preparation body point cloud model;To-be-ground tooth point cloud model is aligned with preparation body point cloud model;Preparation body point cloud model is inflated, and preparation body point cloud model after inflation is obtained;Based on preparation body point cloud model after inflation and to-be-ground tooth point cloud model, extract path reference area, denoising;Path reference area is divided into closed loop area, open loop area;Closed loop area grinding path is generated;Open loop area grinding path is generated;Open loop area grinding path is added after closed loop area grinding path, and dental preparation grinding path is obtained.The application is used to solve the problem that the grinding path planning for dental preparation in the prior art depends on the subjective experience of the attending physician, lacks automated and standardized path planning method, to achieve the purpose of providing a standardized path generation method for automated dental preparation operation.

A tooth preparation baffle facilitating surgical operation comprises a tooth preparation baffle body and a clamping base, and the tooth preparation baffle body is connected with the clamping base through a connecting arm; the tooth preparation baffle body comprises a first baffle making contact with the tongue and a second baffle making contact with the inner side of the lip, the inner side of the first baffle and the inner side of the second baffle are each provided with a protruding upper connecting protruding piece, the bottom of each upper connecting protruding piece is provided with an upwards-concave first inserting groove, and each first inserting groove is connected with one end of the corresponding connecting arm. The clamping base comprises a connecting bow and tooth side clamping wings, the two ends of the connecting bow are connected with the tops of the tooth side clamping wings on the same side respectively, the outer sides of the tooth side clamping wings are provided with protruding lower connecting protruding pieces, the tops of the lower connecting protruding pieces are provided with second inserting grooves recessed downwards, and the second inserting grooves are connected with the other ends of the connecting arms. The tooth baffle plate main body can block the tongue and open the lip, and is matched with the connecting arm and the clamping base to reserve enough space for bonding the dental crown without influencing the bonding, and cotton rolls or medical cotton balls can be stuffed into the gaps to effectively insulate moisture.

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 tooth preparation robot trajectory optimization method based on end stiffness perception is disclosed, and belongs to the technical field of oral medical robots. The method collects the tool contact point coordinate information of the theoretical preparation trajectory and the actual preparation trajectory, calculates the end stiffness matrix and the flexibility matrix of the mechanical arm, analyzes the deformation of the tool contact point under the action of force, and evaluates whether the deformation is stiffness dominated. On this basis, the robot motion direction is optimized according to the end stiffness characteristics, the direction with the maximum stiffness and the minimum deformation is selected as the motion direction of the tooth preparation trajectory, so that the trajectory deviation caused by the end force is effectively suppressed, and the precision and stability of the tooth preparation are improved. The present application realizes intelligent compensation and adaptive adjustment of the robot trajectory in the complex stress environment by combining stiffness perception and direction optimization, is suitable for robot-assisted operation of high-precision oral prosthetic surgery, and has important clinical application value.

The application discloses a precision preparation device for a wear-resistant coating on a surface of a false tooth and relates to the field of false tooth preparation.The device comprises a preparation device, a support platform is fixedly installed on the upper surface of the preparation device, a plurality of equipment processing parts are arranged around the edge of the upper surface of the support platform, a fixing groove is formed in the middle of the top of the support platform, a five-axis linkage table is rotatably installed on the inner wall bottom of the fixing groove, a multidirectional adjusting mechanism is arranged on the upper surface of the five-axis linkage table and is used for adjusting the processing angle of the false tooth, and the multidirectional adjusting mechanism comprises a No.1 support base.Through the five-axis linkage table and the multidirectional adjusting mechanism, the structure design of the double-drive part linkage universal shaft can drive the false tooth to realize full-dimension and dead-angle-free posture adjustment in space, ensure that the coating deposition particles are always perpendicular to the surface to be processed, fundamentally solve the problems of uneven curved surface deposition and existence of shadow dead angle caused by the fixed target position and simple rotating stand of the existing device, and improve the uniformity and precision of coating preparation compared with the prior art.

The invention discloses a precise positioning device for preventing adjacent surface damage for tooth preparation, and relates to the technical field of tooth preparation related equipment. The device comprises two transverse rods, the two transverse rods are symmetrically arranged in the front-back direction, the left end and the right end of each transverse rod are each provided with an abutting curved block, the opposite surface side walls of the two transverse rods are each provided with an adjusting opening, and the lower side walls of the adjusting openings are each provided with a plurality of positioning openings which are linearly and evenly distributed. Positioning arc strips are arranged at the positions, corresponding to the stretching plates, of the opposite surface side walls of the two transverse rods. A protection rod is arranged between every two rotating rods in the same front-back direction, and the surface side of each protection rod is sleeved with a foam cushion cylinder. The protection plates can freely move up and down in the middle strip opening and the penetrating strip opening, adjacent teeth of tooth preparation abutment teeth can be conveniently protected, meanwhile, the protruding blocks on the side walls of the positioning arc strips move out in the positioning opening, the distance between the two protection plates can be adjusted, and it is guaranteed that the position is stable after adjustment.

A method of installing a fiber post for a post and core dental restoration uses a fiber post system which has a plurality of fiber posts having at least two distinct diameters for the fiber posts and at least two preformed fiber post lengths for the fiber posts. Each fiber post containing a visible depth marker indicative of where the post should be placed above and below root orifice, whereby the fiber post selected is configured to be based upon the root length of the specific tooth obturated, yielding proper post space preparation apically for cementation and coronally for foundational core build up. The resulting implanted post eliminates or minimizes post manipulation during tooth preparation to create a mono-block of core material around the post during cementation and build up resulting in no disruption of either bond during preparation.

The utility model relates to a veneering tooth preparation guide plate, which belongs to the technical field of tooth restoration, and is characterized in that a molar guide plate is fixedly connected between a pair of positioning tooth sockets through a connecting piece so as to be matched with a dentist to quickly perform molar treatment in the veneering tooth preparation process, and the positioning tooth sockets are sleeved on teeth on two sides of veneering teeth; according to the tooth grinding device, the tooth grinding guide plate is conveniently fixed to the top or the front side of the veneering tooth, then the tooth grinding device is guided through the guide groove in the tooth grinding guide plate, the technical requirement for tooth grinding is effectively lowered, hurt to a patient due to tooth grinding operation errors is avoided, and meanwhile the tooth grinding device is convenient to use. And the tooth grinding condition of the veneering tooth can be observed in real time by utilizing the operation window formed on the connecting piece, so that a dentist can quickly grind the tooth, and the tooth grinding efficiency is improved.

A dental overlay device includes a base (1013), connecting strut (1018), and veneer holder (1019). The base has a curvature in the form of an arch of a patient and defines a curved axis. The connecting strut has a first end attached to the base and a second end and extends in a generally orthogonal direction to the curved axis. The veneer holder has first and second ends and extends in a transverse direction to the direction the connecting strut extends. The second end of the connecting strut is attached to the veneer holder. A dental overlay device and veneer combination includes a first veneer and a second veneer prepared for mounting onto the plurality of teeth. Floss is configured for passing between the first veneer and the second veneer when the dental overlay device is mounted onto the plurality of teeth.

The present application relates to a kind of laser positioning-based tooth preparation or preparation process detection device and method, the device includes oral teaching head model, multiple laser light towers, tooth jaw tracker, grinding cutting tracker and detection controller, real-time three-dimensional coordinate information of tooth jaw and grinding cutting mobile phone is obtained by laser scanning positioning, and it is aligned with the upper and lower tooth jaw three-dimensional model of oral teaching head model, the action real-time detection of dental grinding cutting operation is completed.The detection device and method of the present application can accurately, stably, low-costly detect the real-time position, direction, angle, trajectory and depth of grinding cutting mobile phone of dentist in tooth preparation or preparation process, record the real-time wrist posture and operation step of dentist in preparation or preparation process, provide reference for the problems existing in preparation or preparation process.

The present disclosure relates to a method and device for constructing a color space database of abutment teeth after tooth preparation. The specific implementation scheme includes: obtaining continuous color parameters of a plurality of abutment tooth samples in the Lab color space after tooth preparation; preprocessing each continuous color parameter; stratifying each continuous color parameter according to at least one lightness parameter threshold and at least one yellowness parameter threshold to generate a plurality of main color clusters; adding a correction label to each main color cluster according to at least one redness parameter threshold to obtain a plurality of color cluster combinations composed of main color clusters and correction labels; and establishing a mapping relationship between the plurality of color cluster combinations and a plurality of restoration strategies and storing the mapping relationship in a database. Thus, the problem of prediction deviation caused by relying on artificial subjective judgment of the color of the abutment tooth after preparation is solved, and a quantifiable and reproducible decision basis is provided for the design of the restoration body of the abutment tooth after preparation and the selection of materials.

The dental bur comprises a working part and a handle part which are connected with each other, and the working part comprises a safety structure, a pinniform structure and a cutting structure which are connected in sequence. The safety structure can be in contact with the gingiva or adjacent teeth during adjacent or subgingival operation, so that damage to soft tissues or healthy teeth is avoided. A plurality of right-handed rotation grooves and a left-handed rotation groove are formed in the peripheral side of the working part, the right-handed rotation grooves spirally extend towards the handle part from the safety structure in the axial direction of the working part, pinniform blades and cutting blades are formed between the adjacent right-handed rotation grooves, and redundant cutting on a tooth body can be reduced when the tooth body is prepared by gradually narrowing the front ends of the pinniform blades; and the original form of the tooth shoulder region is reserved to the greatest extent. The left-hand groove spirally extends towards the handle part from the tail end of the feather-shaped blade in the axial direction of the working part, the left-hand groove cuts the cutting blade to form a plurality of cutting teeth and cutting grooves which are distributed discontinuously, a discontinuous tooth-shaped blade-shaped structure is formed, and the cutting-in and grasping effect equal to that of a carborundum structure can be achieved.

This invention discloses a method for segmenting and sorting tooth preparation trajectories based on a comprehensive priority index, belonging to the field of medical robot-assisted preparation technology. The method first imports the coordinate data of the knife contact points of the theoretical tooth preparation trajectory; calculates the complexity of each knife contact point, which integrates the normalized angular distance ratio and curvature; determines whether the length of the preparation region formed by adjacent knife contact points exceeds a set threshold, and automatically segments and interpolates unqualified regions to ensure that the length of each trajectory segment is uniform and stable; calculates the comprehensive priority index of each preparation region, which integrates the difference between region length and complexity; divides the regions into different priority groups according to the comprehensive priority, achieving cross-group sorting of "difficult first, easy later"; within the same priority group, optimizes the execution order based on the principle of minimum spatial distance. This invention effectively improves the accuracy, efficiency, and motion stability of tooth preparation through multi-index collaborative optimization and a two-layer sorting strategy, and is applicable to various tooth restoration scenarios.

The invention provides a tooth marginal line detection and undercut evaluation method and system based on a generative point cloud network and a storage medium, and relates to the technical field of dental information digitization. The method comprises the following steps: importing a pre-collected single-tooth three-dimensional grid model and a pre-collected preparation body completion line region model, and performing point cloud generation prediction by utilizing a generative point cloud network to generate an edge line; extending a plurality of rays from the edge line, and screening out an optimal ray as an initial insertion axis; evaluating an undercut area formed by the initial insertion shaft, and calculating a corresponding undercut index; and evaluating the undercut index according to a set judgment rule, and outputting the optimal insertion shaft and the undercut index thereof. By screening out the optimal insertion shaft and undercut index, the tooth preparation process can be automated and accurate, the quality and efficiency of preparation body design are improved, personal errors are reduced, better matching of the prosthesis and teeth is ensured, and therefore the repair effect and the patient satisfaction degree are improved.

1. Name of the product in this design: Tooth preparation training device. 2. Purpose of this design: This design is for basic and advanced practical exercises in tooth preparation. 3. The key design features of this product are the combination of shape and pattern. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The application relates to a tooth preparation trajectory planning method, an electronic device and a storage medium. The tooth preparation trajectory planning method comprises the following steps: acquiring a local tooth model and a shoulder platform range. A tooth preparation model is acquired according to the shoulder platform range. A minimum bounding box of the tooth preparation model is acquired, and a first direction perpendicular to the shoulder platform is acquired. A minimum component of a surrounding edge of the minimum bounding box in the first direction is acquired as an axial direction. According to the minimum bounding box and the axial direction, a shoulder platform edge line is acquired, and two shoulder platform trajectory edge lines are obtained according to the shoulder platform edge line, and a shoulder platform tooth preparation trajectory is acquired. An occlusal surface tooth preparation trajectory is acquired in a range formed by occlusal surface curve closure. A functional cusp bevel surface tooth preparation trajectory is acquired in a range formed by functional cusp bevel surface curve closure. According to the acquired shoulder platform tooth preparation trajectory, the occlusal surface tooth preparation trajectory and the functional cusp bevel surface tooth preparation trajectory, different specifications of polishing structures are selected and installed on the actuating end of a surgical machine.

The subject application provides a computer-implemented method (100) and a CAD system (200) for dental prosthesis preparation. The inventors suggest to reverse a current process comprising first preparing a tooth for a dental prosthesis and then detecting the prepared edge with CAD software. In particular, in the subject application, edge preparation and tooth preparation are predefined, i.e. Prior to actual preparation of teeth for prosthetic prostheses. In practice, the new process includes first detecting a prepared edge with CAD software, and finally digitally preparing a tooth for a dental prosthesis.

This application relates to a 3D printing method for training teeth and training teeth themselves. The 3D printing method for training teeth includes: scanning the mandibular first molar and extracting images of the enamel, dentin, and pulp cavity to obtain a first scan image; scanning a standard teaching model corresponding to the mandibular first molar to obtain a second scan image; integrating the first and second scan images to obtain a design image; and designing multiple regions of different colors on the design image according to tooth preparation or cavity preparation standards, wherein at least one region is a region to be ground down. This 3D printing method achieves different levels of training objectives by designing teeth with different color zones, providing intuitive guidance for students' practice and allowing them to learn independently in their daily practice without teacher instruction.

The utility model provides a tooth preparation amount measuring marking ruler which comprises a handheld handle and a gap measuring ruler integrally formed with the handheld handle, a replacement occlusal pad is detachably installed on the gap measuring ruler, and marking liquid used for marking the occlusal surface of teeth is arranged in the face, away from the gap measuring ruler, of the replacement occlusal pad. The measuring scale is integrally formed, the whole tool is firmer and more durable due to the design, meanwhile, a user can operate the measuring scale with one hand conveniently, use convenience and stability are improved, the user can replace a new occlusal pad according to actual needs or abrasion conditions through the detachably-installed replacement occlusal pad, the service life of the measuring scale is prolonged, and the measuring scale is convenient to use. And the measurement accuracy and sanitation are also ensured. In addition, the design of replacing the occlusal pad is also convenient to clean and maintain.