34 results about "Dental cusp" patented technology

The invention discloses a failure restoration retreatment decision-making method based on dynamic occlusion analysis, and the method comprises the steps: constructing a four-dimensional virtual biomechanical model which comprises a patient anatomical structure and a dynamic function through multi-modal data fusion, and enabling the model to be embedded into a real three-dimensional mandibular movement track of a patient to simulate functional movement, thereby breaking through a static analysis blind area, and achieving the real three-dimensional mandibular movement of the patient. The missed diagnosis rate of dynamic interference is reduced; based on quantitative indexes and thresholds such as occlusal contact displacement, occlusal contact distribution symmetry and adjustment quantity of the maximum tooth tip staggering position and the median relation position, experience judgment of doctors is replaced, objectivity, repeatability and accuracy of failure repair and retreatment decision are improved, and excessive or insufficient adjustment is avoided; the treatment effect rehearsal is realized through virtual presetting, the irreversible operation risk is avoided, and the number of times of re-visit and the trial and error cost of a patient are reduced; and meanwhile, the four-dimensional virtual model can be connected with transition and design and manufacturing of a final restoration, so that the accuracy, safety and efficiency of retreatment of a failed restoration are improved.

The invention relates to an occlusion guide plate designing and manufacturing method based on dentition mechanical analysis, which comprises the following steps: S1, acquiring oral cavity image data of a patient, and constructing a three-dimensional digital model comprising a dental crown, a tooth root and an alveolar bone structure; s2, calculating an overall mechanical reference point of a tooth root structure of an anterior maxillary tooth area; s3, acquiring an incisal edge midpoint of each incisal tooth and a cusp point of each canine tooth in the maxillary anterior tooth area, solving a geometric center, and connecting the geometric center with an overall mechanical reference point to form a dentition direction vector; s4, calculating the displacement relationship between the target dentition arrangement and the initial dentition arrangement in the lip-tongue direction; s5, calculating an included angle between the occlusal force direction of the maxillary anterior tooth area and the dentition direction vector; s6, determining key morphological parameters of the occlusion guide plate according to the calculation result of the included angle in S5; and S7, manufacturing the occlusion guide plate. Compared with the prior art, the method has the advantages of precise mechanical adaptation, quantitative treatment prediction, personalized design and the like.

The invention relates to the technical field of medical data processing, and comprises a big data driven oral treatment planning system, which comprises a tooth form data acquisition module, a microcrack identification module, an occlusion stress data processing module, a restoration form optimization module and a customized treatment recommendation module. According to the method, the reliability of micro-crack identification is improved by acquiring the tooth surface morphology point cloud data, accurately depicting micro details of the tooth surface morphology and screening areas with violent curvature change and continuous space, the areas with large local stress are identified by analyzing the stress conditions of tooth tip staggered contact points in different occlusion states, and the accuracy of micro-crack identification is improved. The contact point form of the local abnormal stress area is adjusted, the long-term stability of the restoration is optimized, the adaptability of a restoration material and tooth tissue under different stress conditions is analyzed, whether the restoration form meets the long-term stress balance requirement or not is comprehensively judged, and the long-term stability and occlusion adaptability of the restoration are ensured.

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

The utility model relates to the technical field of oral occlusion positioners, and discloses an occlusion positioner which comprises an upper jaw positioning assembly, the upper jaw positioning assembly comprises an upper jaw positioning piece, a lower jaw positioning assembly is arranged on one side of the upper jaw positioning piece, and the lower jaw positioning assembly comprises a lower jaw positioning piece. An adjusting assembly is arranged on the end face of the side, close to the lower jaw positioning piece, of the upper jaw positioning piece and comprises a mold closing piece arranged on the end face of the side, close to the lower jaw positioning piece, of the upper jaw positioning piece in an attached mode, a positioning assembly is connected between the adjusting assembly and the lower jaw positioning assembly, and the positioning assembly comprises a central positioning screw. The occlusion positioner well solves the problems of muscle de-programming, bad induction of tooth tip inclined planes, induction of maxillofacial deflection, insufficient vertical distance between the jaws and the like, and can find out the fixed position of the jaw position in the positive axis even if the occlusion of a patient is deflected and the positions of the upper jaw and the lower jaw are deflected; during occlusal model taking, the occlusal positioner can better assist doctors in positioning and facilitate recording of model taking data.

The invention discloses an appliance for adjusting a jaw position relation based on simulated tooth tips and a preparation method, and relates to the technical field of medical instruments. The appliance comprises a simulated tooth tip assembly fixed on a tooth occlusal surface, and the simulated tooth tip assembly comprises a plurality of simulated tooth tips arranged on teeth in a back tooth area. Each simulation tooth tip comprises a guide surface arranged in the front area of a simulation tooth tip body, a bearing surface arranged in the rear area of the simulation tooth tip body and a compensation surface matched with an occlusal surface, the guide surfaces guide jaw teeth, so that the upper jaw and the lower jaw tend to be a repeatable stable jaw position, the influence of the simulation tooth tips on a wearer in the wearing process is relatively small, and the simulation tooth tips are more stable. In addition, the simulation tooth tips are arranged in the rear tooth area, the mechanical effect of the simulation tooth tips cannot affect the inferior incisor teeth, and the risk of lip inclination of the lower anterior teeth is reduced.

1. Name of the product in this design: Graphical user interface for displaying virtual reality surgical navigation content in virtual glasses. 2. Purpose of this design: For use with virtual glasses, in conjunction with an oral implant surgery navigation system, to display virtual reality surgical navigation content within the device. 3. The key design feature of this product is its graphical user interface. 4. The image or photo that best illustrates the design points: Interface change state diagram 2. 5. Other views are standard designs, omitting rear view, left view, right view, top view, bottom view, and perspective view. 6. Human-computer interaction method of graphical user interface: After the device is powered on, it enters the main view, and the enlarged view of the main view shows the graphical user interface in which the device is running. After scanning the QR code to configure the network connection in the main view, you will enter the interface change state diagram 1. After the spatial matching is completed in the interface change state diagram 1, you will jump to the interface change state diagram 2. Click "Start Registration" in the interface change state diagram 2 to enter the interface change state diagram 3 to process the jawbone registration. After the jawbone registration progress bar is completed, you will enter the interface change state diagram 4. Click "Start Navigation" in the interface change state diagram 4 to enter the interface change state diagram 5. At this time, keep the adapter phone aligned with the position of the tooth cusp on the real model and remain still to enter the interface change state diagram 6, which displays the confidence point effect status (there may be errors caused by the positioning device loosening during the operation. The doctor can judge the current error by clicking the tooth cusp. All tooth cusps are confidence points. When the status corresponding to the confidence point is displayed, you can intuitively judge whether there is a large error at present).

The invention relates to the technical field of oral cavity plastic surgery, in particular to a manufacturing method of a digital buckle type guide plate for dental crown lengthening, which comprises the following steps of: 1, scanning an upper jaw dental arch and a lower jaw dental arch of a patient to obtain intraoral scanning data, recording an occlusion relationship at a maximum tooth tip staggering position, and exporting the data for later use; step 2, acquiring facial three-dimensional scanning data, alveolar bone and craniofacial structure data, digital facial arch data, mandibular position and mandibular movement parameters of the patient; 3, fitting various data to determine ideal gingival margin position parameters and bone trimming contour line parameters required in the operation; and 4, on the basis of the parameters determined in the step 3, buckle type guide plates are designed in design software, the buckle type guide plates comprise a gingival resection guide plate and an osteoplasty guide plate, and finally the buckle type guide plates are printed through a 3D printer. By implementing the buckle type guide plate prepared by the method, the stability, the accuracy, the operation convenience and the operation efficiency in the operation process of the dental crown extension surgery are remarkably improved.

The utility model discloses a shell-shaped dental instrument and a shell-shaped dental instrument component, the shell-shaped dental instrument comprises an appliance and a supporting unit, the appliance is provided with a cavity for accommodating teeth, and the occlusal surface of the appliance comprises a supporting surface corresponding to the occlusal surface of a certain rear tooth. The supporting surface comprises a first supporting surface positioned in the middle and a second supporting surface arranged around the first supporting surface, a separation line between the first supporting surface and the second supporting surface passes through the plurality of tips, the plurality of tips respectively correspond to a plurality of tooth tips of the rear teeth, the supporting unit is positioned on the supporting surface, and a first outer peripheral edge line is formed in a junction area of the supporting unit and the supporting surface; the first outer peripheral line comprises a first part located on the first supporting face and a second part located on the second supporting face, the second part is connected with the first part, and the second part is located on the cheek side or the tongue side of the first supporting face. The supporting unit extends to the second supporting surface, so that the contact area between the supporting unit and a jaw occlusal surface can be increased, and the purpose of stable occlusal is achieved.

The present application provides a dental model, a dental model set, a shell-shaped tooth appliance and a preparation method thereof. The dental model comprises a base. The geometry of the base is configured such that the average height from the bottom surface to the point on the sagittal plane where the highest cusp point of each tooth in the tooth model of the posterior tooth region on one side is projected is greater than the average height from the bottom surface to the point on the sagittal plane where the highest cusp point of each tooth in the tooth model of the posterior tooth region on the other side is projected. This configuration ensures that the thickness of the two shell-shaped tooth appliances obtained by pressing the two shell-shaped tooth appliances using the same film at the same time is substantially the same, thereby improving the preparation efficiency, reducing the production cost, and ensuring the correction effect of the shell-shaped tooth appliance.

A novel method and system are provided for a base guide with a retention mechanism designed to facilitate sequential dental implant surgical guides and immediate loading of a fixed full-arch provisional prosthesis. The system leverages advanced computer-guided surgery technology to enhance accuracy, efficiency, and patient outcomes in implant dentistry. The base guide with retention mechanism serves as a foundational component for guiding the sequential placement of dental implants and facilitating immediate loading of a fixed full-arch provisional prosthesis, offering significant benefits to clinicians and patients alike. A pin positioning guide that latches over the cusps of a small number of teeth is used to place the base guide.

The utility model discloses an invisible orthodontic appliance with an improved root control structure. The invisible orthodontic appliance comprises an invisible orthodontic appliance body and the improved root control structure, the improved root control structure is arranged corresponding to at least one of the one-third position of the lip face neck area of a single anterior tooth and the one-third position of the mesial adjacent face neck area and / or the distal tooth tip area, and is arranged on the inner surface of a cavity, used for containing teeth, of the invisible orthodontic appliance body. The improved root control structure is a solid structure formed by locally thickening the invisible orthodontic appliance body relative to the inner surface of the cavity to the tooth surface of the anterior tooth, and extends along at least one of the near-far-middle direction and the lip-tongue direction; wherein the anterior teeth are selected from at least one of incisor teeth and canine teeth.

The application provides a system and method for predicting the amount of bone expansion of maxillary expansion based on digital images, which comprises a CBCT image acquisition device, an image correction module, an image measurement module, a data analysis module and a data output module. The CBCT image acquisition device acquires a CBCT image in a natural head position and a bite position of a dental cusp staggered position. The image correction module corrects the head position and obtains a palatal cross-sectional view. The image measurement module measures the depth IDP of the palatine bone pyramid protrusion embedded in the sphenoid ala notch of the pterygopalatine fissure on the palatal cross-section. The data analysis module determines the embedding shape type of the pterygopalatine fissure according to the IDP value. The data output module outputs whether the predicted amount of bone expansion is sufficient according to the type of the pterygopalatine fissure. The system and method can predict the expansion treatment effect of the population with insufficient transverse development of the maxilla by predicting the amount of bone expansion, especially the effect of the micro-implant assisted rapid expansion of the maxilla.

This invention belongs to the technical field of dental 3D modeling, specifically relating to a dental 3D scanning method and system using a high-efficiency laser light source. The method acquires images of a planar calibration plate, a stepped calibration plate, and a cylindrical arc calibration plate to establish a calibration parameter table. During scanning, uniform reference frames and low-brightness stripe frames are acquired to generate specular reflection masks, occlusion masks, gingival masks, and tooth body masks. A first stripe frame is acquired for the tooth body region, and a second stripe frame with low peak current is acquired for the reflective and occluded edge regions. Spatial depth values ​​are then selected by combining the auxiliary reference frames to generate tooth surface point cloud fragments with region origin markers. Finally, based on pose, cusp edges, and adjacent tooth contact area features, a 3D surface model of the dental arch is obtained through fusion. This invention can reduce the impact of reflection and occlusion on the 3D reconstruction of the tooth surface.

The inclined tooth arrangement structure comprises a lower jaw assembly and an upper jaw assembly, the lower jaw assembly comprises a pair of first mounting grooves and a plurality of first teeth, the chewing sides of the first teeth are provided with first tooth tips, the pair of first mounting grooves are arranged in parallel, and the first teeth are embedded in the first mounting grooves; the upper jaw assembly comprises a pressing seat and a plurality of second teeth, a pair of second mounting grooves are formed in the surface of the pressing seat, the pressing seat is arranged at the tops of the second mounting grooves, the second teeth are embedded in the second mounting grooves, and second tooth tips are arranged on the chewing sides of the second teeth; the second teeth are axially and obliquely arranged; the horizontal distance between the two first teeth is smaller than the horizontal distance between the two second teeth. The first tooth tips and the second tooth tips which are arranged in the staggered mode are completely attached, so that the first teeth and the second teeth are meshed more tightly, the contact area of the first teeth and the second teeth is increased, the food crushing effect can be enhanced, and the chewing efficiency is improved.

The invention discloses a slip and a surface hardening process thereof, and belongs to the technical field of oil-gas exploration, development and drilling engineering equipment. The surface hardening process of the slip comprises the following steps: carrying out thermal refining on a slip base body blank; and after thermal refining is completed, the slip is subjected to ion nitriding treatment. The invention further discloses the slip. According to the surface hardening process of the slip, a brand-new ion nitriding process is adopted for one-time hardening forming, the size precision is enough, the slip can be put into application without finish machining, and therefore the problem that the carburizing treatment surface hardening yield of the cylindrical sharp tooth slip is extremely low is solved; and meanwhile, laser quenching and common ion nitriding tooth tip point ablation are avoided, the occurrence of a soft belt at the tooth tip part is greatly eliminated and weakened, and the hardness and uniformity of the tooth tip are guaranteed.

The invention discloses a tooth feature point extraction method, and the method comprises the steps: building a three-dimensional mesh model of a whole row of natural dentition where a target tooth is located according to the parameters of the whole row of natural dentition where the target tooth is located; importing the point cloud information of the two second posterior molars of the whole row of natural dentition where the target tooth is located, the target tooth, the left adjacent tooth and the right adjacent tooth into a three-dimensional grid model, and establishing a local coordinate system; segmenting the target tooth by using the projection, and outputting point cloud data of the half tooth close to the occlusal surface; performing twice clustering on the half-tooth point cloud data, and taking out Gaussian curvature of a result after the second clustering at a corresponding point of the full-tooth point cloud data; according to the point with the maximum Gaussian curvature in each list, tooth tip feature points of the target tooth are determined, projection and sorting are carried out, the point which is closest to the middle point of the long side and the short side and has the minimum Gaussian curvature is taken as a tooth socket feature point, all tooth feature points of the target tooth are output, and feature point information of each tooth package can be accurately extracted through the method.

An oral digital impression instrument that includes a set of computer-readable instructions configured to implement an intelligent design method of a digital model. The method includes the steps of data acquisition, data preprocessing, intelligent design, alternative dental crown matching, dental pattern adjustment and the like. A to-be-produced tooth is produced through extracting a distance between teeth adjacent to the to-be-produced tooth, buccal and lingual dental arch crown curves, an occlusal gum diameter height and cusp pit and fissure ridge shape features of opposite jaws, and matching and adjusting alternative dental crown models.

The utility model discloses a device for synchronously guiding implant implantation by lifting and positioning outside the maxillary sinus, which relates to the technical field of medical supplies and comprises a lifting guide plate outside the maxillary sinus, an implantation guide plate and a retention clamping plate, and the lifting guide plate outside the maxillary sinus is integrally connected with the retention clamping plate and the implantation guide plate; a reserved window is formed in the maxillary sinus outer lifting guide plate and is used for surgical positioning; a guide hole is formed in the implantation guide plate, the guide hole is used for guiding an implant to be implanted, and a water conveying hole is formed in the guide hole and used for cooling the prepared hole; the retention clamping plate wraps the maxillary teeth on the two sides of the tooth missing area, so that the whole device is fixed, a positioning window is formed in the position, attached to the tooth tip, of the retention clamping plate, and whether the retention clamping plate is completely clamped in place or not is checked through the positioning window. The device can be used for external lifting of the maxillary sinus and can also guide implantation of the implant at the same time, the surgical operation is simple and convenient, the difficulty is low, and the time of a doctor in the surgical process is shortened.

The utility model provides an occlusal pad device for distal upright impacted teeth, and relates to the technical field of oral tooth correction, the occlusal pad device comprises an occlusal pad, the occlusal pad is configured to be adhered to anchorage teeth, the occlusal pad comprises a first area and a second area, the first area is configured to wrap tongue side tooth tips, and the second area is configured to wrap tongue side tooth tips. The second area is configured to wrap the buccal side tooth tip and contact with the central fossa of the pair of jaw teeth; the first region and the second region are further configured in a manner that the top surface of the second region is higher than the top surface of the first region in a state that the occlusal pad is adhered to the anchorage teeth; the bottom face of the occlusal pad further comprises a third area, the third area is located in the middle of the occlusal pad, and the third area is connected with at least one arch wire fixing piece. According to the utility model, the influence on the connecting effect of the arch wire fixing piece can be avoided, and the effect that the arch wire plays a role in guiding the mesial impacted molar to be distal and upright can be ensured.

The invention discloses a CBCT data and oral scanning data automatic registration method and system based on deep learning. The method comprises the steps that CBCT data and oral scanning data are subjected to single-tooth segmentation to obtain first-mode single-tooth segmentation data and second-mode single-tooth segmentation data; respectively obtaining a first tooth tip point feature point cloud corresponding to the first modal single-tooth segmentation data and a second tooth tip point feature point cloud corresponding to the second modal single-tooth segmentation data; performing coarse registration on the first tooth tip point feature point cloud and the second tooth tip point feature point cloud, and obtaining a corresponding initial transformation matrix; performing fine registration on the first modal single-tooth segmentation data and the second modal single-tooth segmentation data based on the initial transformation matrix, and obtaining a corresponding target rigid body transformation matrix; and mapping coordinates corresponding to all vertexes of the second modal single-tooth segmentation data to a CBCT coordinate system according to the target rigid transformation matrix. Therefore, the CBCT data and the oral scanning data can be automatically registered efficiently and accurately, and the operation cost is low.

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

In artificial teeth belonging to posterior teeth parts, buccal convexity on an upper jaw side is suitable in occlusion; in a centric occlusal position, lingual cusps on the upper jaw side are fit in central fossae on a lower jaw side; W2 / W1 is 0.9 to 1.22 where W1 is a width of a lingual cusp of a first molar tooth on the upper jaw side, and W2 is a width of a pit of a first molar tooth on the lower jaw side one of the artificial teeth in a buccolingual direction; and Sk / Sj is 0.85 to 0.95 where, when the first molar tooth on the lower jaw side is viewed from an occlusal surface, Sj is an area surrounded by ridges of buccal and lingual edges that pass buccal and lingual cusp tips, and mesial and distal marginal ridges, and Sk is an area surrounded by an edge of the pit.

An elastic thread locknut belongs to the technical field of fasteners and comprises a nut body, and a tooth-shaped inclined surface of a tightening back side of an internal thread of the nut body is an internal shrinkage tooth internal thread which is bent inwards and shrunk inwards; according to the internal shrinkage tooth internal thread, the included angle of the inclined faces on the two sides of the tooth form of the internal thread serves as a reference tooth form angle, on the basis of the reference tooth form angle and the distance from the tooth bottom to the tooth crest, a turning point is arranged at the position, away from the tooth crest by 20%-50%, of the tooth form back side face, and the angle from the turning point to the tooth bottom is turned inwards in an inclined mode to form a turning tooth form angle. An internal shrinkage is formed between the tooth bottom and the tooth-shaped inclined surface at the position, so that a gap is formed, and an internal shrinkage tooth internal thread is formed; the anti-loosening nut has the advantages that the tooth-shaped inclined face of the internal thread of the nut is provided with the internal shrinkage tooth internal thread, when the anti-loosening nut is used, the tooth tip portion of the external thread is elastically deformed, meanwhile, the external thread of a screw rod is also deformed, and therefore the internal thread and the external thread are tightly locked with each other, and the purpose of preventing loosening is achieved.

A jaw position correction device including a lateral tooth row arrangement unit, a first pressing force generating unit, a second pressing force generating unit, and a resultant force transmitting unit; (1) When worn, the lateral dental row placement section is positioned along the palate side of the maxillary dental row in the region corresponding in length to the canine tooth through the second premolar in the right and left maxillary dental row of the wearer (patient), (2) The first pressing force generating unit includes a pressing force transmitting unit and a pressing force source in the vicinity of the hard palate, and is connected to the right and left lateral tooth row arrangement units, (3) The second pressing force generating portion exists at the connection portion between the right and left lateral tooth row arrangement portion and the right and left first pressing force transmitting portion, and generates a force that tends to widen the angle formed by the connection portion toward the rear as the second pressing force, (4) The resultant force transmission part includes a bending redundant part connected to the distal end of the lateral tooth row arrangement part, and an attachment fixing part connected to the bending redundant part and having the function of fixing to the maxillary molar, (5) A jaw position correction device capable of transmitting the resultant force of the first and second pressing forces to the maxillary molars via the attachment and fixing part; It has been found that by using this method, early contact with cusp interference is generated in the maxillary molars, and as a result, the patient's jaw position is reset to a relaxed state, the facial appearance is improved, and maxillary protrusion can be alleviated.

The invention provides a nest type three-dimensional all-point jaw frame device which is used for transferring the intra-oral jaw biting relation of a patient in complete denture repair and effectively simulating the movement track of a tooth tip staggered position interval of the patient. According to the device, three sectional guide compasses are additionally arranged on an upper jaw body base, and when a lower jaw body base is fixedly connected with a lower jaw branch assembly, two lower jaw branches and a cutting guide rod can be inserted into a corresponding condylar guide nest and a corresponding cutting guide nest to do reciprocating motion along a synchronous groove, and the indexing of the compasses is adjusted; and the operation state of all-directional sliding of the lower jaw dentition on the maxillary surface of the maxillary dentition in-position track can be effectively reflected, so that the movement track of the complete denture in a tooth tip staggered position interval is effectively simulated, and accurate and rapid jaw adjustment is realized. The device can also realize mutual switching between a tooth arrangement mode and a jaw adjustment mode by locking and switching the upper jaw body base and the lower jaw body assembly, and has good functionality and practicability.

The present invention relates to a method, device, and storage medium for digital design of oral restorations, comprising: step S1: using CBCT images to obtain point clouds of the enamel, dentin, and pulp of the tooth to be restored and its reference tooth; step S2: determining the center point of the reference tooth based on the cusp positions of the enamel, dentin, and pulp of the reference tooth, and determining the center point of the tooth to be restored based on a first volume ratio between the reference tooth and the tooth to be restored; step S3: constructing a cone of infinite length with the center point of the tooth as the vertex for each of the tooth to be restored and the reference tooth, to obtain the volume coefficients of the dentin and enamel of the reference tooth and the tooth to be restored; and step S4: gradually enlarging the apex angle of the cone and reconstructing the enamel and dentin of the tooth to be restored layer by layer. Compared with existing technologies, the present invention accurately simulates the complex geometric morphology and biomechanical properties of enamel and dentin based on CBCT images, and sets weights at each level to achieve a biomimetic restoration that is more consistent with natural teeth.

The invention provides a method for reconstructing an occlusion guide plate of a dentition support, which can solve the problem of occlusion fixation caused by incomplete dentition after a mandible fracture occurs, can fully consider the characteristics of mixed dentition and tooth embryo of children, and can perform customized design according to individual differences of patients. According to the technical scheme, the method comprises the steps that oral cavity data of a patient are obtained, and the obtained oral cavity data comprise deciduous dentition, mixed dentition and tooth embryo positions; three-dimensional reconstruction is carried out on oral cavity data to generate an upper jawbone model, a lower jawbone model, a dentition model and a tooth embryo model, the reconstruction of the occlusion relationship of a child patient suffering from the lower jawbone fracture needs to be realized by anatomical reduction of a fracture line and relative position characteristics of upper teeth and lower teeth during occlusion of an apical fossa, and under the computer-aided design, the reconstruction of the occlusion relationship of the child patient suffering from the lower jawbone fracture is realized. Performing reconstruction and simulated reduction on the mandible model by establishing upper and lower apical fossa occlusion through simulated reduction; generating an occlusal guide plate model through computer digital design of the simulated reset mandible model and the dentition model, and promoting occlusal relationship recovery of a dental crown part of the occlusal guide plate model by adopting tailoring design; a pore channel is established on the occlusion guide plate model based on Boolean operation, the pore channel is established based on anatomical characteristics of the lower jawbone of the patient and the dentition deletion condition, and the position of the pore channel and the position of the tooth embryo are not overlapped.

The utility model discloses a dental arch appliance and a dental arch correction system, the appliance comprises a shell-shaped body, the shell-shaped body is used for being sleeved on a dental crown of a tooth along the dentition direction, the appliance further comprises an extension part, the extension part is connected with the lingual edge of the shell-shaped body in the height direction of the tooth, and the extension part is connected with the lingual edge of the shell-shaped body. The tongue-side gingival edge extends in the direction far away from the tooth tip; and in the dentition direction, the extension part is arranged around the tongue side edge. The rigidity of the appliance is enhanced by changing the form of the appliance, specifically, the extension part is arranged on the lingual side edge of at least one tooth, the cutting line of the shell-shaped body on the lingual side edge can be prolonged, the inertia moment of the appliance in the maxillofacial projection direction is increased, and therefore the rigidity of the appliance in the dental arch force application direction is improved.