36 results about "Single tooth implant" patented technology

The invention relates to a three-dimensional dental model segmentation method for computer-aided stealth orthodontics, which comprises the following steps: step 1, reading a triangular mesh dental model; step 2, simplifying the model; step 3, marking a tooth seed point and a dental see point; step 4, setting a threshold value, and forming a tooth contour line through the set characteristic regionand the diffusion operation; step 5, repeating that step 4 until the diffusion of all tooth seed point is finished; step 6, carrying out tooth side bypass; step 7, obtaining a hole mesh model; step 8:integrating the step 4 and the step 7 to obtain the final single tooth model. There are few interactions and simple interactions, even if there are some errors, the results of tooth segmentation arenot impacted. Through repair of the holes between teeth, the shape of the teeth can be automatically restored, so that a single tooth with lateral shape can be separated, the boundary of the segmentedtooth is clear and accurate, andfurther treatment is convenient in the later stage.

The invention discloses a method for determining a container model of a single tooth, in particular to a method for determining a container model based on tooth surface characteristics and a local three-dimensional right angle coordinate system, which mainly comprises the following steps: based on a segmentation tooth digital model, reflecting the curve degree at the peak by utilizing complex collection of a triangular facet and a discrete Gaussian curvature, collecting surface feature points of a single tooth; based on the surface feature points of the single tooth, establishing corresponding local three-dimensional right angle coordinates for incisor teeth, cuspid teeth, premolar teeth, and odontoprisis; and respectively establishing the container models of the incisor teeth, the premolar teeth, the odontoprisis and the cuspid teeth by using extreme values of the single tooth model under the three-dimensional right angle coordinate system. The invention has the advantages of novel and reasonable design, convenient implementation, high operating speed, high data processing accuracy and good implementation effect, can extract characteristic points of teeth and facilitate the operation on teeth, and can be used in the tooth correcting system.

The invention discloses a method for extracting a tooth three-dimensional point cloud data surface pit and fissure feature region. According to the method, the pit and fissure skeleton line on the surface of the tooth can be extracted only by inputting the three-dimensional point cloud data of the single tooth, section processing is performed on the three-dimensional data of the tooth according tothe pit and fissure skeleton line, the pit and fissure section curve of the tooth is obtained through curve fitting, and the method does not damage the tooth but can obtain a complete and comprehensive pit and fissure form.

The invention discloses an adelomorphic orthodontic accessory guide board, a complete set product, a production method and an accessory bonding method. The accessory guide board can be single or multiple accessory guide boards which are connected; the single accessory guide board is composed of two parts of (1) a part matched with a tooth occlusal surface and (2) a part matched with facing and anaccessory, wherein the part matched with the tooth occlusal surface can be stuck to an occlusal face portion on the occlusal surface of a single tooth, an indent which can accommodate the tooth occlusal surface is formed in the occlusal face portion, the part matched with the facing and the accessory can be stuck to a side portion of the facing, and an indent which can be filled with dental resinto form the accessory is formed in the side portion. By means of the accessory guide board, an accessory in a design scheme can be precisely restored, and orthodontic force can be expressed more accurately. According to the accessory bonding method, a thin resin layer which is formed on the facing around the accessory to cause deviation from the accessory in the design scheme is avoided, the accessory in the design scheme can be restored better, the mechanical expression performance of the accessory can be made to be better, the moving orthodontic force which is transferred to the tooth is more precise, orthodontics time is saved to a larger degree, and a better orthodontics effect is achieved.

The invention discloses a method for measuring three-dimensional movement of teeth in the orthodontic process. The method comprises the following steps: overlapping a CBCT (cone beam computed tomography) tooth model at initial treatment and an intraoral scanning model, and constructing a complete tooth model; matching and overlapping the intraoral scanning model after a period of treatment with amodel at an initial moment, and performing comparison; performing analysis by isolating single teeth, and establishing a partial three-dimensional coordinate system of a target tooth; making three reference points in bracket positions of upper dental crowns of front and rear intraoral models; and calculating a spatial alternation matrix according to the coordinate of the reference points, and furthermore, calculating three-dimensional translation and rotation movement of the tooth, so as to obtain three-dimensional tooth movement. All teeth are analyzed by using the same method, and displacement of a whole tooth row is obtained. The intraoral scanning model of a patient is acquired for multiple times continuously, and continuous three-dimensional displacement of the whole tooth row in theorthodontic process can be measured.

The invention discloses a three-dimensional tooth point cloud model data classification method and system based on deep learning, and the method comprises the steps: obtaining a tooth three-dimensional model, and extracting a whole set of tooth point cloud model from the tooth three-dimensional model; segmenting the whole set of tooth point cloud model to obtain a plurality of single tooth point cloud models; for a single tooth point cloud model, extracting a single tooth point cloud model feature, a relative position feature and an adjacent similarity feature, and respectively inputting the features into a classifier; classifying the input multiple features in the classifier, and outputting a preliminary classification result of a single tooth.

The invention discloses a tooth orthodontic result prediction method and system based on feature point identification. The method comprises the following steps: obtaining a dental crown point cloud, a tooth point cloud and a tooth label according to a dentition model; extracting dentition global features and tooth local features according to the dental crown point cloud and the tooth point cloud, performing feature fusion on the dentition global features, the tooth tag of the single tooth and the tooth local features, and extracting feature points of the single tooth according to the fusion features and offset vectors of points and feature points in the tooth point cloud; fusing the feature points of the single tooth with the tooth point cloud to extract tooth attention features, obtaining dentition attention features according to the tooth attention features, and fusing the dentition attention features, the global dentition features and the local tooth features to obtain a point cloud of fused feature points; and obtaining rigid body transformation parameters before and after tooth orthodontics according to the point cloud of the fused feature points and the dental crown point cloud of the target position, and obtaining a dental crown model prediction result after orthodontics according to the rigid body transformation parameters and the dental crown point cloud of the initial position to be orthodontic.

The present invention discloses a CT image based porous implant making method and system. The technical scheme is that a single tooth profile is segmented according to an oral CT image of a patient; the segmented tooth profile is converted to be in a three-dimensional point cloud format, and a tooth model is rebuilt; the crown and root ratio is determined according to the CT image and segmentationis performed to obtain a tooth root model; a porous implant form is designed according to a tooth root form of the patient; and a personalized abutment is designed according to a tooth root part anda tooth crown part or a mirror tooth crown part, and a root type implant with integrated abutment and implant is finally established. The degree of matching between the root type implant and the bonewall of a tooth socket for tooth extraction is higher; and the phenomenon of stress shielding can be avoided, and the high long-term stability can be obtained after implantation of the implant.

Disclosed is a dental correction step-by-step method. The dental correction step-by-step method comprises the following steps of acquiring initial tooth state information of a patient and target position information corrected to a target position in a dental coordinate system; according to tooth initial position information and / or missing tooth position information in the initial tooth state information, obtaining a tooth jaw area position where the farthest-end molar is located; acquiring a remote movement distance parameter of the farthest-end molar moving from the initial position information to the target position information on the tooth jaw area; formulating a step-by-step movement scheme for dental correction of the patient according to the remote movement distance parameter information; and according to the tooth initial position information and the correction target position information, obtaining the total movement amount of a single tooth in different correction modes, and constructing a tooth movement step-by-step list by combining a dental correction step-by-step movement scheme with a molar remote movement logic step-by-step algorithm. The invention further discloses a dental correction step-by-step system, electronic equipment and a computer storage medium.

The invention discloses a tooth segmentation method based on peak clustering, and the method comprises the following steps: S1, extracting a three-dimensional dental crown model boundary, i.e., a gingival boundary B, and segmenting the B into a front boundary B2 and a rear boundary B1; S2, performing peak clustering on points on the gingival boundary B to obtain candidate tooth joint points; S3, pairing the candidate tooth joint points to obtain joint point pairs; and S4, for each joint point pair, solving a geodesic path of the joint point pair on the three-dimensional dental crown model, andsegmenting the three-dimensional dental crown model along the geodesic path between the joint point pairs to obtain a single tooth model. For the characteristics of gingival boundaries of a tooth model, density peak clustering is carried out by using the three-dimensional boundary information to obtain the joint points on the boundary as the segmentation points, the complex boundary shape similarto a sawtooth shape does not greatly influence the result by using the clustering method, the user interaction is not needed, and the tooth model can be automatically and efficiently segmented.

The invention relates to the technical field of false tooth adjustment, in particular to tooth manufacturing equipment based on 3D printing, comprising a gum base and a single tooth model, the single tooth model comprises a normal tooth model and an orthodontic tooth model, a cross-shaped sliding groove is formed in the top of the gum base, and the bottom of the orthodontic tooth model is connected with a tooth base supporting column; threaded rods are installed at the axes of the tooth base supporting columns, rectangular blocks are fixed to the middles of the bottoms of the tooth base supporting columns, elastic pads are bonded to the bottoms of the rectangular blocks, and anti-disengaging blocks are symmetrically installed at the bottoms of the outer walls of the rectangular blocks; containing grooves are formed in the middles of the tops of the rectangular blocks, and the ends, close to each other, of the anti-disengaging blocks extend into the containing grooves; and the bottoms of the threaded rods are rotationally connected with isosceles trapezoid blocks, fixing plates are fixed to the bottoms of the anti-falling blocks, springs are symmetrically fixed to the inner walls of the containing grooves, and the other ends of the springs abut against the fixing plates. According to the tooth manufacturing equipment, the number of tooth models needed in the correcting period can be reduced, the angle and position of the tooth model can be conveniently adjusted, and practicability is high.

A method for identifying the periodontitis absorption degree based on mesial and distal key points comprises the following steps: firstly, acquiring panoramic images of teeth, performing image enhancement operation on each panoramic image, and combining the initial panoramic image and the enhanced panoramic image together to serve as segmentation model input; inputting the panoramic film into a full tooth segmentation model to obtain a segmentation result, and cutting a single tooth area in the segmentation result to obtain a single tooth image; and then, inputting a single tooth image into the mesial and distal key point detection models to obtain a detection result; and finally, calculating the periodontitis absorption degree of the teeth according to the distance relationship between the key points in the detection result. According to the method, the regional information of each tooth can be extracted, so that interference information among the teeth in the panoramic film is greatly reduced, in addition, six point positions required for judging the periodontitis absorption degree can be identified from the single tooth image, and the identification accuracy is improved, so that the actual requirements of hospitals are met.

The invention provides an orthodontic bracket mounting device and method. The orthodontic bracket mounting device comprises a positioning device and a handheld device. The method comprises the following steps: acquiring bracket mounting and positioning data of one tooth in a computer three-dimensional model; disassembling the positioning data into left-right data, up-down data, thickness data andangle data; adjusting the positioning device according to the left-right data and the up-down data, and determining the left-right position and the up-down position of the mounting bracket on the corresponding tooth of a patient; and adjusting the handheld device according to the thickness data and the angle data, and determining the thickness position and the angle position of the mounting bracket on the corresponding tooth of the patient. The left-right direction position and the up-down direction position of the bracket are determined through the positioning device, the thickness position and the angle position of the bracket are determined through the handheld device and the long axis of the crown of the single tooth, and due to the fact that the positioning device and the handheld device can be recycled, the treatment cost of the patient is effectively reduced.

The invention provides a rapid tooth segmentation method based on a three-dimensional dental model. The method comprises the following steps: S1, carrying out data preprocessing on an input three-dimensional dental model; S2, re-modeling the shape on the three-dimensional dental model; s3, determining grid maximum path search based on an Astar algorithm; and S4, identifying gingival margin line and fusion region features by using a convolutional neural network, and separating out a single tooth. According to the segmentation method, each tooth can be rapidly and accurately segmented, and a better reference value is provided for doctors for subsequent denture repair.

Embodiments of the present invention provide a method, system, devices and software which provide customized, clinically relevant designs, e.g. treatment plans / solutions for at least single tooth replacement therapy in real-time as needed to enable immediate confirmation of the validity and execution of patient-specific treatment solutions.A Machine Learning algorithm is used in a method or system for computer implementation of automatic restoration design. The restoration design includes the design of restorative elements such as crowns and abutments. Software is provided for carrying out the methods when executed on a digital processor. Manufacturing of the restorative elements is also included.

The embodiment of the invention discloses a training sample generation method and device, an image processing method and device, electronic equipment and a medium. A specific embodiment of the training sample generation method comprises the steps of acquiring a face image displaying a mouth and annotation information of the face image; extracting a mouth image from the face image; converting the annotation information to obtain converted annotation information; sorting each key points of at least one tooth based on the converted annotation information to obtain a sorting number; and generatinga training sample according to the mouth image, the sorting number and converted coordinate information. According to the training sample generation method provided by the embodiment of the invention, the training sample generated by the method can conveniently locate the position of the key points of a single tooth, so the accuracy of subsequent prediction of the key point information of the tooth is improved, and preparation is made for subsequent prediction of the single tooth.

The invention discloses a customized self-ligating bracket appliance and a manufacturing method thereof. The manufacturing method comprises the following steps: S1, acquiring digital dentition data of a patient, and acquiring an STL (Standard Template Library) model of teeth of the patient; and S2, segmenting a dentition model into single teeth by using drawing software in a computer, marking a clinical crown center point of each tooth, setting a clinical crown long axis, and performing digital tooth arrangement simulation according to requirements of a doctor and actual conditions of an alveolar base bone and a dentition of the patient. The customized self-ligating bracket appliance comprises a plurality of brackets and buccal tubes which are connected in series through arch wires, each bracket comprises a self-ligating bracket body, a bracket connecting body and a bracket bottom plate, each buccal tube comprises a buccal tube body, a buccal tube connecting body and a buccal tube bottom plate, the self-ligating bracket bodies and the buccal tube bodies are both prefabricated finished products, and two bracket wings are respectively fixed at the upper end and the lower end of each self-ligating bracket body. According to the invention, accurate customization is carried out according to the tooth form of a customer, so that no difference exists in the use process, and accurate orthodontic treatment is realized.

The invention relates to the technical field of oral medical treatment, and discloses a CBCT tooth automatic positioning and using method which comprises the following steps: S01, filing CT data; s02, AI is calculated, and an AI result is generated; s03, the client enters CT film reading; s04, downloading and loading the CT data; s05, opening a tooth lens function; s06, selecting a corresponding tooth position in the tooth position table; s07, a'tooth lens' function of a three-dimensional tooth rendering mode is added into traditional CT film reading, the method is suitable for diagnosis of clinical diseases such as'tooth extraction, root canal treatment and tooth restoration 'in oral treatment, a doctor can accurately and rapidly position a single tooth through tooth position selection, more comprehensive analysis is facilitated, and compared with the traditional technology, the method has the advantages that the method is simple and convenient to operate. The tooth lens accurately positions the selected tooth position through a series of methods such as AI identification, position matrix conversion and rendering, takes the tooth position as a visual center, and provides a horizontal section, a near-far-middle section, a buccal-lingual section and a three-dimensional reconstruction image effect.

The invention provides a periodontal soft tissue treatment effect evaluation method and a periodontal soft tissue treatment effect evaluation device, and solves the problems that an existing measurement method has great limitation, the thickness of a specific site of periodontal soft tissue cannot be accurately measured, and different researches cannot be compared and analyzed due to the fact that selection of a target area and a mark point is different. The periodontal soft tissue treatment effect evaluation method comprises the following steps: collecting oral cavity image information before and after treatment; extracting dentition data and periodontal soft tissue data based on the oral image information; obtaining single tooth data based on the dentition data, and obtaining gingival data corresponding to each tooth based on the periodontal soft tissue data; matching the single tooth data and the gingival data before and after treatment to obtain changes of the single tooth data and the gingival data before and after treatment; and evaluating the periodontal soft tissue treatment effect based on the change of the single tooth data and the gingival data before and after treatment.

The invention discloses a tooth cushion kit for an oral catheter; the cross section of a tooth cushion body is in an isosceles trapezoid shape; furthermore, a penetrating groove is formed in the tooth cushion body in a penetrating mode; limiting protection arms are symmetrically installed on the peripheries of the two longitudinal ends of the tooth cushion body; tooth grooves are formed in the positions, between the limiting protection arms on the two sides, of the two sides of the tooth cushion body; and a traction strip is connected to the bottom of the tooth cushion body. According to the invention, the tooth cushion body is set to be in the isosceles trapezoid shape; the base angles alpha with different opening degrees are set according to different crowds so as to improve the applicable crowd of the tooth cushion body; the limiting protection arms are fixedly installed on the two sides of the tooth cushion body to prevent the tooth cushion body from shifting and loosening; the tooth grooves are formed in the two sides of the tooth cushion body between the limiting protection arms on the two sides and can contain 3-4 molars; the contact area of a tooth cushion and a tooth body is increased; the pressure of the tooth cushion on a single tooth body during the use of the tooth cushion is reduced; damage such as tooth loosening and falling caused by long-time pressure is prevented; the tooth cushion is moved backwards from traditional upper and lower incisor teeth to molar positions on the two sides; and occlusion is more reliable.

The invention relates to a substitution body of a temporary restoration for dental medical treatment and a temporary tooth preparation method. The substitution body of the temporary restoration for dental medical treatment disclosed by the invention is characterized by comprising a kernel of single tooth form shaped as an incisor tooth, a canine tooth, a premolar tooth or a molar or a kernel of an arrangement combination body of the single tooth form; thermoplastic materials, such as modelling compound, reshaping plastic wax and the like, are attached at the lip cheek side, the tongue palate side and contact surfaces and tissue surfaces of adjacent teeth of the kernel. According to the invention, the temporary tooth substitution body formed by connecting one or more teeth together and attached with thermoplastic materials, such as modelling compound, reshaping plastic wax and the like, is adopted, therefore, the material and the time for manufacturing temporary teeth in an extraoral manner are saved; communication between doctors and patients is more convenient; the substitution body is beneficial to pre-judging a treatment effect by doctors and preparing a guide tooth body; medical communication is simple and effective; the medical cost is reduced; in addition, compared with the temporary restoration designed and manufactured by a computer in an assistant manner, the substitution body disclosed by the invention has the obvious advantages of being low in cost, convenient in time and few in link.

The invention discloses a three-dimensional dentition segmentation and labeling method. The problem of confusion of dental crown boundary segmentation is improved by constraining dental crown shape distribution and dental crown boundary curvature. Meanwhile, an apparent similarity relationship between local vertexes is utilized to further eliminate an error segmentation region. The segmentation of the dental crown and the boundary thereof can be used for further enhancing the feature extraction and vertex classification performance of the network model. For the three-dimensional dentition grid model, N is the number of vertexes of the three-dimensional dentition model, features of the three-dimensional dentition grid model are effectively extracted, the three-dimensional dentition grid model is segmented and labeled, and a category label of each vertex on the grid model is obtained, wherein K is the number of the category labels; the accurate segmentation of the single tooth is obtained, and the tooth position is marked.