32 results about "Single tooth" patented technology

This utility model discloses a heavy-duty gear, specifically relating to the field of heavy-duty gear technology. It includes a gear disk with a plurality of tooth blocks arranged in a ring on its outer wall. A connecting structure is provided at the connection between the tooth blocks and the gear disk. The connecting structure includes a mating plate, which is fixedly installed on the bottom of the tooth blocks. A mating groove is formed on the surface of the gear disk, and a positioning groove is formed at the bottom of the inner cavity of the mating groove. A positioning block is fixedly installed at the bottom of the mating plate. Mounting grooves communicating with the mating grooves are formed on both sides of the outer wall of the gear disk. Mounting plates are fixedly installed at both ends of the mating plate. Fastening bolts are provided at the connection between the mounting plates and the gear disk. This utility model facilitates the installation of shafts and gear disks. Furthermore, once a single tooth block on the gear is worn or damaged, it allows operators to easily disassemble and replace the damaged tooth block, reducing gear maintenance costs and improving service life and performance.

This invention relates to the interdisciplinary field of medical image analysis and artificial intelligence, and particularly to a method, device, and medium for detecting non-occlusal abnormalities based on oral images. The method first acquires oral images and determines their abnormality category: a first abnormality (dependent on the characteristics of a single tooth) or a second abnormality (dependent on the spatial relationships between multiple teeth). Based on the category determination, an adaptive differential detection process is executed: if it is a first abnormality, a two-stage process of tooth position detection and single-tooth recognition is used to output a detection result associated with a precise FDI number; if it is a second abnormality, an end-to-end target detection model directly outputs the abnormality type and location region; if it is a mixed category, the two processes are executed in parallel and the results are intelligently integrated. This invention achieves automated, precise, and structured detection of non-occlusal diseases.

This utility model relates to the field of gear hole machining technology, specifically to a device for machining balance shaft gear holes. It includes a connecting plate with several limiting grooves on one side. A gripper slides within these grooves. A worm gear ring rotates inside the connecting plate, with spiral teeth fixed to one side. Several arc-shaped tooth grooves meshing with the spiral teeth are formed on one side of the gripper. A worm rotates inside the connecting plate, meshing with the worm gear ring. A slot is formed at one end of the gripper, with a pair of positioning blocks rotating within it. A gear body is clamped between the grippers. This utility model solves the problem that in existing gear machining, machine tool clamps often grip only the outer edge of the gear, making single-tooth clamping prone to displacement. Furthermore, the self-locking mechanism between the grippers and the spiral teeth inevitably leads to loosening over time.

This invention belongs to the field of medical image processing technology and proposes a method for 3D tooth point cloud segmentation and tooth type recognition based on deep learning. The main scheme is as follows: acquire 3D tooth point cloud data, construct a 3D tooth point cloud dataset and perform data preprocessing; construct a 3D tooth point cloud semantic segmentation network and determine the loss function, and train the 3D tooth point cloud semantic segmentation network based on the loss function; use the trained 3D tooth point cloud semantic segmentation network to perform point-by-point semantic prediction on the point cloud of the tooth row to be tested, and obtain the point-level category probability distribution; perform multi-level probability smoothing and interpolation recovery on the point-level category probability distribution to improve the spatial continuity of the prediction results and restore the original point cloud resolution; perform density-adaptive connectivity analysis and denoising processing on the restored point cloud segmentation results to extract single tooth instances; and use instance-level category statistics for each single tooth instance to determine the final semantic category, thereby realizing tooth type recognition.

This invention discloses a method for registering IOS and CBCT images based on particle swarm optimization and single-tooth optimization, belonging to the field of image data processing. The method includes the following steps: Preprocessing and segmentation steps are used to obtain the semantic segmentation results of teeth from IOS and CBCT images, as well as point cloud data; a particle swarm optimization algorithm is introduced to iteratively search and optimize the six-degree-of-freedom rigid transformation parameters between the IOS and CBCT image data, thereby completing the initial global registration at the dental arch scale; using the globally registered result as a basis, the registration object is divided into multiple local units based on a single tooth, and local iterative alignment is performed on each unit to eliminate minor misalignments on individual teeth and optimize the overall registration effect. This invention, based on handling cross-modal differences and achieving global registration, further ensures registration accuracy at the single-tooth level through a local optimization mechanism, providing reliable automated registration support for clinical scenarios such as orthodontics and implantology.

Analysis shows that the present disclosure discloses a single-tooth track shoe cogging-down pass and a hot rolling method, comprising a first cogging hole and a second cogging hole, the first cogging hole is formed by a first upper roller and a first lower roller of a cogging mill, and the second cogging hole is formed by a second upper roller and a second lower roller of the cogging mill, wherein the first cogging hole is a front hole, and the first cogging hole is used to extrude the rectangular continuous casting billet into a mountain shaped middle billet including a right bent limb, a first center column, and a left bent limb, wherein the second cogging hole is a rear hole, the second cogging hole is used to extrude the mountain shaped middle billet into an inverted T-shaped middle billet including a right flat limb, a second center column, and a left flat limb. The present disclosure significantly reduces the dependence on billet size, allowing for the production of larger single-tooth track shoes using smaller billets, which has a good energy-saving and consumption reducing effect. The unique design of the first and second cogging holes eliminate the shortcomings of low efficiency, poor safety, and poor dimensional accuracy caused by the instability of billets, and realizes the efficient production of single-tooth track shoe.

The application discloses a force couple orthodontic accessory, a personalized fixed appliance, a tooth correction system, a design method of the force couple orthodontic accessory and a design method of the tooth correction system. The force couple orthodontic accessory comprises a bottom plate, an accessory body and a force couple structure, the bottom plate is used for being bonded with a labial buccal surface of a tooth, the accessory body is provided with an arch wire accommodating cavity, and the force couple structure is arranged in the arch wire accommodating cavity and comprises protrusions and / or grooves which are symmetrically arranged on both sides of the channel and are used for cooperating with partial bending structures of an arch wire to form a force couple for a single tooth. The personalized fixed appliance comprises a plurality of force couple orthodontic accessories and a personalized arch wire, the arch wire is provided with partial bending structures corresponding to positions of teeth to be corrected, and a preset force couple is formed after loading. The force couple orthodontic accessory, the personalized fixed appliance and the tooth correction system provided by the application realize accurate force couple control of a single tooth and improve correction precision and a personalized degree.

This invention relates to the field of metal cutting tool technology, and discloses a trapezoidal thread cutting tool with both finishing and compensation functions. The tool includes a tool body and at least one cutting unit disposed on the tool body. The cutting unit includes: a forming tooth with a cutting edge for machining a complete thread shape, the cutting edge including a guide surface bottom arc; and an auxiliary tooth located on one side of the bearing surface of the forming tooth and participating in cutting along with the forming tooth. The auxiliary tooth is spaced from the forming tooth by a full pitch along the tool feed direction, and the auxiliary tooth has a guide surface bottom arc identical in shape and size to the forming tooth. When the forming tooth wears, the auxiliary tooth compensates for and corrects the bottom arc of the thread guide surface during machining. This invention achieves a dual breakthrough in the lifespan and machining quality of a single-tooth trapezoidal thread cutting tool with extremely low additional cost.

Methods and apparatus (including software) for determining and / or locating dental ridges may include identifying patterns corresponding to the locations of two or more ridge points of a single tooth in a 3D model of a patient's dentition, and determining the tooth ridge based on the identified patterns corresponding to the locations of said two or more ridge points. The determined dental ridges can be used to determine dental treatment planning. Methods and apparatus for identifying and quantifying reciprocating tooth movement in treatment planning are also described herein. Reciprocating tooth movement can be used as a basis for adjusting treatment planning by reducing the amount of reciprocating movement or eliminating reciprocating movement from the treatment plan.

This invention proposes a design method for a parallel-axis, bidirectional, purely rolling linear gear pair. First, a meshing coordinate system is established and the coordinate transformation matrix is ​​derived. An extended linear gear meshing equation is constructed to solve for the relative velocity and unit common normal vector at the meshing point. Second, the contact line equation is solved based on the coordinate transformation matrix and the meshing equation, and contact lines are arranged on both sides of the gear tooth to achieve bidirectional transmission. Combining a preset normal tooth profile shape and tooth radius, the equations of the center guide lines corresponding to the four contact lines are calculated. Then, based on the criterion that the relative velocity of the driving and driven gears is zero during meshing, a pure rolling condition equation is established. Finally, based on the contact line equation, the center guide line equation, and the pure rolling condition, combined with the preset normal tooth profile, a scanning method is used to construct a single linear gear tooth and array it to generate a three-dimensional solid model. The linear gear designed in this invention can achieve bidirectional, continuous, and smooth transmission.

The present application relates to a kind of orthodontic process monitoring methods based on dentition three-dimensional model prediction in the technical field of orthodontics, comprising the following steps: a kind of orthodontic process monitoring methods based on dentition three-dimensional model prediction, characterized by comprising the following steps: S1, obtain the three-dimensional dental model data of T n Moment and segmentation processing, output the mask and corresponding tooth number of single tooth in three-dimensional dental model;S2, obtain the two-dimensional image data of N teeth of T n+m Moment and segmentation processing, output the mask and corresponding tooth number of single tooth of two-dimensional tooth;S3, reference point detection: including by immovable tooth prediction and manual marking;S4, camera pose estimation: S5, tooth pose estimation: S6, dentition three-dimensional reconstruction.The present application realizes the accurate estimation, monitoring of moving tooth in orthodontic treatment process by the prediction of dentition three-dimensional model at different time in orthodontic process, can effectively assist orthodontic scheme to smoothly carry out.

This utility model relates to a stator core for a flat wire vertically wound motor used in robots, comprising a core yoke ring and a core tooth assembly. The core tooth assembly includes multiple independent single-tooth core blocks arranged equidistantly along the circumference, with end pressure rings fixed to both ends of each independent single-tooth core block. The core yoke ring is inserted and fixed to the inner circumference of the multiple independent single-tooth core blocks. This utility model adopts a split structure of "core yoke ring + independent single-tooth core block," and the two ends of the tooth block are fixed into a rigid assembly by the end pressure rings, and then the yoke ring is inserted into the inner circumference of the tooth block. This structure subverts the traditional integrated tooth and yoke or bolt connection mode, and has the following advantages: 1. Each tooth block can be wound independently (the coil does not need to pass through the slot), greatly improving the efficiency and consistency of flat wire vertical winding; 2. The yoke ring and the inner circumference of the tooth block are inserted and matched to ensure air gap uniformity; 3. Damaged single teeth can be replaced independently, reducing maintenance costs.

The utility model relates to the technical field of circular saw blade, specifically relates to a 98T woodworking cutting saw blade, including saw disc, the outer diameter of saw disc is 300mm, the edge of saw disc is surrounded and is provided with 98 saw teeth, the saw tooth includes the cutting section and the sunken section connected into an organic whole, the sunken section is used for connecting the saw disc, the width of sunken section is less than the width of cutting section. The utility model adopts the specific tooth number design of 98 teeth, and the tooth spacing is controlled at 9.61mm, and the sunken section is arranged in the part of saw tooth connecting the saw disc, provides the high -efficient chip removal capacity, under the same feed speed and rotational speed, 98 teeth relative to the 96 teeth saw blade widely used in the industry, the single-tooth cutting amount reduces about 2.08%, and the single-tooth heat load is smaller.

This invention proposes a design method for a parallel-axis, bidirectional, purely rolling linear gear pair. First, a meshing coordinate system is established and the coordinate transformation matrix is ​​derived. An extended linear gear meshing equation is constructed to solve for the relative velocity and unit common normal vector at the meshing point. Second, the contact line equation is solved based on the coordinate transformation matrix and the meshing equation, and contact lines are arranged on both sides of the gear tooth to achieve bidirectional transmission. Combining a preset normal tooth profile shape and tooth radius, the equations of the center guide lines corresponding to the four contact lines are calculated. Then, based on the criterion that the relative velocity of the driving and driven gears is zero during meshing, a pure rolling condition equation is established. Finally, based on the contact line equation, the center guide line equation, and the pure rolling condition, combined with the preset normal tooth profile, a scanning method is used to construct a single linear gear tooth and array it to generate a three-dimensional solid model. The linear gear designed in this invention can achieve bidirectional, continuous, and smooth transmission.

A method for detecting 3D tooth landmarks based on orthogonal decoupling and asymmetric bi-branch architecture includes: acquiring raw 3D tooth point cloud data from a 3D dental scanning device; extracting high-resolution local point clouds of the region of interest for a single tooth and low-resolution global point clouds of the entire dentition; performing PCA geometric perception serialization on the low-resolution global point cloud to generate an ordered point cloud sequence that conforms to the prior anatomical structure of the dental arch; constructing a local neighborhood topology structure for the high-resolution local point cloud through graph convolution to obtain input feature representations for the global and local branches respectively; feeding the feature representations of the global and local branches into a bidirectional state-space model and a graph convolutional coding network respectively to extract global topological features of the entire dentition and local geometric features of a single tooth; feeding the global topological features and local geometric features into an orthogonal gating fusion module, achieving clean feature fusion by removing redundant components through orthogonal projection, obtaining robust feature representations after fusion, and constructing a geometric heterogeneity hierarchical supervision system to complete end-to-end model training; and passing the fused feature representations to a prediction head to generate tooth anatomy category prediction results and 3D... Sub-millimeter-level precise coordinates of tooth landmarks are used for clinical decision-making in oral healthcare, such as digital orthodontics, virtual tooth alignment, and orthognathic surgery planning.

The utility model discloses a combined gear, include: combined gear, including gear body, gear ring and connecting hole, the outside installation of gear ring has tooth, the inside of connecting hole is provided with positioning hole, assembly component is set up in the connecting place of gear body and gear ring, including the fixed in the inside of gear ring a plurality of groups of clamping block, the outside of a plurality of groups clamping block all is provided with positioning slot, the outside of gear body is provided with the clamping groove, can solve when single tooth damage, generally need integral replacement gear assembly, and further exist certain shortage: first, gear body and tooth are integrated structure, lead to material utilization rate is insufficient, second, need to disassemble entire transmission system, the shutdown time is longer, lead to maintenance difficulty, finally, most of the undamaged wheel body parts are forced to scrap, cause the problem of resource waste.

The application discloses an oral scanning tooth position recognition system and method based on artificial intelligence, relates to the technical field of digital oral cavity, and comprises data acquisition, pretreatment, feature extraction and segmentation, tooth position recognition, result output and model training modules. The feature extraction adopts a deep learning network fusing local and expanded features, extracts local geometric features through dynamic edge convolution, and extracts long-distance semantic features by combining expanded edge convolution and hybrid sampling. The method processes oral scanning data through the above modules, realizes gingival segmentation, single tooth division and tooth position recognition, outputs segmentation masks and recognition results, and improves recognition accuracy and efficiency.

The present application relates to the technical field of road maintenance machinery, and particularly relates to a passive ice-breaking tooth carrier design method suitable for high-adhesion ice, comprising: obtaining key characteristic parameters of high-adhesion ice; selecting and designing tooth material, shape and key geometric parameters according to the characteristics of high-adhesion ice; simulating the ice-breaking process of a single tooth by using a finite element method and extracting an effective breaking range; designing the diameter and circumferential layout of the tooth carrier based on the ice-breaking range and chip removal constraints; determining the length and axial layout of the carrier according to road specifications and structural constraints; and designing the wall thickness and checking the strength based on dynamic load. The method realizes the design of a special tooth carrier for high-adhesion ice through systematic steps, and has the advantages of standardized design process, short research and development cycle and low cost.

The utility model relates to a kind of vertical winding flat wire stator assembly and motor for robot motor, including core and winding, the core includes core yoke part ring and core tooth component, core tooth component includes multiple single-tooth independent core blocks being equidistantly arranged along circumference, and the both ends of multiple single-tooth independent core blocks are respectively fixed with end portion compression ring, the core yoke part ring is inserted and fixed at the inner circumference of multiple single-tooth independent core blocks, the winding includes coil and PCB board, one coil is wound on each single-tooth independent core block, the both ends of each coil are respectively welded with PCB board, lead-out wire is also provided on the PCB board.The utility model structure greatly improves the efficiency and consistency of flat wire vertical winding, and stator air gap is more uniform;Single-tooth damage of stator core can be independently replaced, and maintenance cost is reduced.In addition, the utility model integrates all lead-out wires using PCB board, compresses axial space, improves power density, eliminates manual welding error, and improves electrical reliability.

The invention relates to a device for inspecting pinion teeth by single-sided gearing, comprising: - a single tooth (26) adapted to mesh with driven teeth (22) of a pinion (12) to be inspected, - means for moving said single tooth (26) relative to the driven teeth (22), - at least one means for measuring a displacement (α) of the driven teeth (22) in response to a displacement (X) of the single tooth (26), - at least one means for comparing the displacement (α) of the driven teeth (22) with respect to the displacement (X) of the single tooth (26) when said single tooth (26) drives said pinion (12) to be inspected by traversing each of the flanks (34, 36) of each tooth (38, 40) of the driven teeth (22), between an edge (42, 44) and a root (46) of the driven dentition (22). Figure for the abbreviation: Figure 9.

The application discloses an environment-friendly recycling treatment equipment for waste concrete, which comprises a vibrating feeder, a coarse crushing unit, a fine crushing unit, a vibrating screening machine and a plurality of belt lifting conveyors. The plurality of belt lifting conveyors are respectively arranged between the vibrating feeder and the coarse crushing unit, between the coarse crushing unit and the fine crushing unit, and between the fine crushing unit and the vibrating screening machine. The coarse crushing unit is a jaw crusher. The hydraulic floating gap adjusting structure can realize the elastic yielding structure with adjustable yielding force, controllable stroke, automatic reset and no influence on normal crushing granularity, can ensure that the hard objects can smoothly pass through, will not be stuck and broken, and is suitable for the treatment of waste concrete. In the modular movable tooth roller structure, the tooth plate can change the installation angle during installation. A single tooth plate can realize two-state installation. When only the installation angle of the tooth plate is changed without changing the tooth shape, other tooth plates do not need to be changed, and only the installation state needs to be changed.

The utility model provides a kind of unequal tooth width split type iron core, including outer layer A iron core, inner layer B iron core and fastening support, all iron core teeth tooth width of A iron core is equal, outer circle closed slot is equipped on iron core tooth, all iron core teeth are integrally connected to form annular whole by outer circle closed slot;All iron core teeth tooth width of B iron core is equal, all iron core teeth are integrally connected to form annular whole by inner circle magnetic yoke;The iron core tooth of A iron core and B iron core is staggered and spaced arrangement, and the iron core tooth tooth width of A iron core and B iron core is unequal;A iron core and B iron core are made into double-layer split type unequal tooth width iron core structure by coaxial nesting, and the both ends of fastening support are respectively welded and fixed in A iron core inner wall and B iron core magnetic yoke outer wall.The utility model solves the problem of low slot fill factor, large torque fluctuation, large tooth slot torque and large noise of existing concentrated winding motor;Solve the problems of high single-tooth punching cost, poor reliability and other problems of split type iron core.

The utility model relates to a broken machine technical field, the utility model provides a single tooth roll crusher grate, it includes base, the base, the top wall left side fixedly connected with the frame of base, the top of frame is provided with single tooth roll axle, the inner wall equidistance of frame is provided with a plurality of broken plates, the inside of frame is provided with fixed mechanism, the fixed mechanism is used for fixing broken plate, the top wall mounting of base has the support dismounting mechanism, the support dismounting mechanism is used for supporting single tooth roll axle and is convenient for dismounting, the fixed mechanism includes T block, in the utility model, the T block before and after broken plate slides into the slide groove of frame, and the broken plate is positioned initially, then the bolt passes through T block and is screwed into the thread hole of slide groove, and the bolt extrudes spring and fixes the broken plate stably, then the bolt passes through the frame and inserts into the T block outer wall circular groove and restricts displacement, can resist the high frequency impact and vibration when breaking, avoids the broken plate loosening or displacement.

Lawn mower, in particular robotic lawn mower, designed to move along a travel direction on a driving surface or a substrate, comprising a housing body, a mowing assembly and a handle section, wherein the mowing assembly is attached to the housing body; characterized in that the housing body comprises a housing, wherein the handle section is formed on a side surface of the housing and is designed as a strip-shaped component, wherein the handle section is provided with a tooth structure on a side facing the driving surface or the substrate, wherein the tooth structure comprises several tooth units, wherein the projection of a single tooth unit onto the driving surface or substratethe substrate is strip-shaped and has a first extension direction, wherein an angle between the first extension direction and the direction of travel is not equal to 90°, wherein a straight line extending parallel to the first extension direction and intersecting a center point of the handle section passes through the mowing assembly; wherein a plurality of tooth units are arranged at intervals or spaced apart from each other along a longitudinal direction of the handle section, wherein two adjacent tooth units are arranged along the longitudinal direction of the handle section at a first distance D1, wherein a minimum space between the orthogonal projections of two adjacent tooth units in a plane perpendicular to the direction of travel defines a second distance D2, wherein the ratio of the first distance D1 to the second distance D2 is greater than 1 and less than 5.

The application discloses a kind of pitch cumulative total deviation calculation method, system, equipment and storage medium, pitch cumulative total deviation calculation method includes obtaining the first coordinate data of all tooth surface discrete points of planetary gear ring, wherein, tooth surface discrete point is the discrete node of the intersection line of target tooth surface and preset reference end surface of planetary gear ring, first coordinate data includes the coordinate before deformation of tooth surface discrete point and the coordinate after deformation of tooth surface discrete point;In the case where the feature node of each tooth on target tooth surface is determined based on all first coordinate data, the second coordinate data corresponding to each feature node is obtained, the single tooth pitch deviation value of each tooth on target tooth surface is determined based on all second coordinate data;Based on all single tooth pitch deviation values, the tooth pitch cumulative total deviation of planetary gear ring is determined, improve the calculation efficiency and accuracy of tooth pitch cumulative total deviation.

The present application relates to the technical field of medical image processing, in particular to a multi-scale feature image semantic segmentation method for alveolar bone defect detection. The present application converts the cone-beam computed tomography tensor containing artifacts to the frequency domain, applies a directional band-pass mask to filter out noise, and performs nonlinear truncation on the attenuation coefficient overlap area in the spatial domain to amplify the gray scale gradient; multi-scale spatial features are extracted using a feature network, and dynamic weighting is performed based on the anisotropic local gradient variance; in the optimization stage, an asymmetric weighted three-dimensional geometric deviation penalty term is introduced to force the decoupling of the connected boundaries, and the segmentation grid is output; finally, the local morphological principal axis of a single tooth is fitted by segmentation, and projection calculation is performed along the principal axis between the structure contour lines, effectively improving the three-dimensional segmentation accuracy and morphological fidelity of low-contrast microstructure.

The application discloses a single-tooth cutting force measuring method for a hard alloy circular saw blade, and belongs to the technical field of cutting force measurement. The method comprises the following steps: preparing a single-tooth equivalent saw blade with the same diameter and tooth shape parameters as a multi-tooth saw blade to be measured; feeding a workpiece at an equivalent speed obtained by dividing a normal feeding speed by the number of teeth; building a three-way strain measuring device of a square cross-section force bar, and pasting strain gauges on three surfaces of the force bar; executing cutting at a cutting end point and collecting strain signals; and calculating tangential force, axial force and radial force according to bending theory. The application eliminates multi-tooth load coupling through a single-tooth equivalent cutting principle, indirectly measures by using a force bar to avoid signal transmission difficulty of a rotating part, and has the advantages of high precision, low cost and simple operation.

The utility model relates to sinter crushing equipment technical field, the utility model provides a kind of crusher, it includes crusher main body, the inside of crusher main body is provided with grate plate adjusting mechanism, the grate plate adjusting mechanism includes hydraulic column, the hydraulic column is fixedly installed in the upper end of the crusher main body;Driving mechanism, the driving mechanism includes mounting bracket and single-tooth roller, the single-tooth roller rotation is installed in the inside of the crusher main body, one end of the single-tooth roller penetrates the crusher main body and is fixedly connected with synchronous wheel two;Crushing tooth, the crushing tooth includes mounting seat, locking piece and tooth handle, the mounting seat is fixedly installed in the surface of the connecting column. Through the above technical scheme, the technical problem that the single-tooth head in prior art is mostly integral welding or cast structure, cannot be replaced individually, and the replacement cycle of prior art is long, affects continuous productivity, and replacement cost is high is solved.

This application discloses a method, apparatus, device, medium, and product for detecting dental defects in children, relating to the field of image processing technology. The method includes preprocessing an acquired panoramic radiograph of a child to be detected to obtain a standard image of a child's teeth; extracting local and global feature vectors from the standard image of the child's teeth, and then weighted and fused the extracted local and global feature vectors to obtain a fused feature image of the teeth; extracting geometric anchor points and calibrating the coordinates of each tooth region based on the fused feature image of the teeth to obtain the positional information of each tooth; matching the defect type of a single tooth region according to the fused feature image of the teeth and the positional information of each tooth to obtain a defect identification result; and generating a detection result based on the defect identification result and the positional information of each tooth. This application improves the detection accuracy and positioning precision of permanent and deciduous teeth in children on panoramic radiographs, avoiding missed detection of small teeth.