34 results about "Single tooth implant" patented technology

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 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 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 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.

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 discloses a parallel guiding-locating device for oral implantology. A main guider comprises a first orientating column, a first position-fixing arm, a first orientating hole, a first position-fixing hole and a handheld arm, wherein one end of the first position-fixing arm is connected with the first orientating column, the other end of the first position-fixing arm is connected withthe handheld arm, the first orientating hole is formed in one end of the first position-fixing arm, the first orientating hole is formed in the middle of the first orientating column, and a groove isformed in the handheld arm; an auxiliary guider comprises a second position-fixing arm, one end of the second position-fixing arm is connected with a second orientating column, a second position-fixing hole is formed in the other end of the second position-fixing arm, and a second orientating hole is formed in the middle of the second orientating column; and a position-fixing screw penetrates through the first position-fixing hole and the second position-fixing so as to connect the main guider with the auxiliary guider and is a spiral screw, and a handheld wing is arranged at the upper part ofthe position-fixing screw. The parallel guiding-locating device has the beneficial effects that the device can be independently used and combined for use, is suitable for situations that one tooth islost and multiple teeth are continuously lost and can be used for advantageously and accurately implanting multiple dental implants.

The invention discloses a dentition segmentation method, a tooth segmentation method and device, and electronic equipment. The method comprises steps of selecting a first type of feature points on a digitalized dentition model, the first type of feature points being grid vertexes for guiding the segmentation of each single tooth in a dentition; classifying second-class feature points in the digital dentition model according to the first-class feature points, and determining teeth to which the second-class feature points belong, the second-class feature points being grid vertexes used for representing the overall shape of the digital dentition model; and respectively combining the second type of feature points belonging to each tooth to obtain a digitalized tooth region of each single toothsegmented by the digitalized dentition model. Since the two types of feature points are integrally selected based on the digital dentition model, the classification information of the feature pointscovers the integral classification features of the digital dentition model, and even if the model has noise data, the noise data can be uniformly distributed to global data, so a single tooth can be segmented more accurately.