Generation method of preoperative orthodontic target model, orthodontic system and generation method of orthodontic system

Abstract

The embodiment of the invention provides a method for generating a preoperative orthodontic target model. The method comprises the following steps: acquiring an initial three-dimensional dental composite model; obtaining relative poses of a tooth model and a corresponding bone block model in the initial three-dimensional dental composite model and a orthognathic treatment demand; under the condition that the relative poses of the tooth model and the corresponding bone block model in the initial three-dimensional tooth jaw composite model are kept unchanged, the poses of all the bone block models in the initial three-dimensional tooth jaw composite model are adjusted according to the orthognathic treatment requirement, and a postoperative three-dimensional tooth jaw composite model is obtained; under the condition that the relative pose relation of each bone block model in the postoperative three-dimensional tooth jaw composite model is kept unchanged, respectively aligning upper and lower jaw teeth in the postoperative three-dimensional tooth jaw composite model to obtain a postoperative orthodontic tooth jaw composite model; under the condition that the relative poses of the bone block models in the initial three-dimensional dental composite model are kept unchanged, the poses of tooth models in the initial three-dimensional dental composite model are adjusted, and a preoperative orthodontic target model is obtained.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of oral orthodontics, and in particular to a method for generating a preoperative orthodontic target model, a correction system and a generation method thereof. Background Art

[0002] Orthodontic and orthognathic combined treatment is an important medical means to correct skeletal dentofacial deformities, which requires the joint treatment of orthodontists and orthognathic surgeons. The process of traditional orthodontic and orthognathic combined treatment is as follows: after formulating a combined treatment plan, the orthodontist first performs preoperative orthodontic treatment to fully display the bone deformity, and then the orthognathic surgeon designs and performs the operation. The operation immediately achieves a roughly normal occlusion relationship, but the occlusion of individual teeth is poor and needs to be further improved through postoperative orthodontic treatment. The relative position relationship between the upper and lower jaws is the basis for orthognathic surgeons to shape the face shape, and it is also the basis for orthodontists to reshape the occlusion relationship. It is an important technical link for doctors in the two departments to conduct treatment handover, and it is also a key node that affects the treatment effect. The traditional treatment mode of this link is: the orthodontist "walks and watches" during preoperative orthodontic treatment, and continuously collects the patient's occlusion model for manual matching until it is considered that the upper and lower teeth can achieve a stable occlusion relationship, and then refers to the orthognathic surgeon for surgery. This method has the following problems: 1. The orthodontist's preoperative orthodontics lacks clear goals and has low treatment efficiency, usually taking 2-3 years or even longer; 2. The speed and quality of preoperative orthodontics are highly dependent on the orthodontist's experience and cannot be standardized, which seriously limits the promotion and application of medical technology.

[0003] The prior art has developed a method for planning clinical orthognathic surgery using computer-assisted surgical simulation, which uses CBCT or spiral CT to acquire a virtual model of the patient's jaw to design the orthognathic surgery plan and the surgical jaw plate during the operation (for example, Chinese Patent No. CN201380025743.8, entitled "Patent for a Method for Surgical Planning," or Chinese Patent No. CN201780064319.2, entitled "Patent for a System and Method for Computer-Assisted Orthognathic Surgery Planning"). However, this method can only be used to design orthognathic surgery, and the orthodontist still cannot accurately obtain the preoperative orthodontic target position, which may result in the need for orthodontics after surgery, leading to a series of problems such as a long treatment period and uncertain treatment results. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a method for generating a preoperative orthodontic target model, a correction system and a generation method thereof. The above method can solve the problem in the prior art that it is impossible to accurately determine the preoperative orthodontic target position in orthodontic orthognathic combined treatment, thereby improving the treatment effect of orthodontic orthognathic combined treatment, shortening the correction time, and reducing the possibility of further orthodontics after orthognathic surgery.

[0005] To achieve the above objectives, an embodiment of the present application provides a method for generating a preoperative orthodontic target model, comprising:

[0006] Acquire an initial three-dimensional tooth-jaw composite model, wherein the initial three-dimensional tooth-jaw composite model includes a virtual model of maxillary teeth, a virtual model of maxillary bones, a virtual model of mandibular teeth, and a virtual model of mandibular bones;

[0007] Obtaining the relative positions of the tooth model and the corresponding bone block model in the initial three-dimensional tooth-jaw composite model and the orthognathic treatment requirements; adjusting the positions of the bone block models in the initial three-dimensional tooth-jaw composite model according to the orthognathic treatment requirements while keeping the relative positions of the tooth model and the corresponding bone block model in the initial three-dimensional tooth-jaw composite model unchanged, to obtain a postoperative three-dimensional tooth-jaw composite model;

[0008] Under the condition that the relative posture relationship of each bone block model in the postoperative three-dimensional dental-jaw composite model remains unchanged, the upper and lower jaw teeth in the postoperative three-dimensional dental-jaw composite model are respectively aligned to obtain a postoperative orthodontic dental-jaw composite model;

[0009] Under the condition that the relative postures of the bone block models in the initial three-dimensional dental-jaw composite model remain unchanged, the posture of the tooth model in the initial three-dimensional dental-jaw composite model is adjusted to obtain a preoperative orthodontic target model; wherein the relative postures of the tooth model and the corresponding bone block model in the preoperative orthodontic target model are consistent with the relative postures of the tooth model and the corresponding bone block model in the postoperative orthodontic dental-jaw composite model.

[0010] Preferably, the upper and lower teeth in the postoperative three-dimensional dental-jaw composite model are aligned: the Spee curve is flattened, the upper and lower dental arches are coordinated, the secondary tooth axis inclination caused by the abnormal position of the upper and lower jaws is relieved, and the upper and lower jaw occlusion relationship is adjusted.

[0011] Preferably, the relative positions of the tooth model and the corresponding bone block model in the initial three-dimensional dental-jaw composite model and the orthognathic treatment requirements are obtained, including: obtaining the FDI tooth position number corresponding to each bone block model and mapping it to the corresponding tooth model.

[0012] Preferably, under the condition that the relative posture of the tooth model and the corresponding bone block model in the initial three-dimensional dental-jaw composite model remains unchanged, the posture of each bone block model in the initial three-dimensional dental-jaw composite model is adjusted according to the orthognathic treatment needs to obtain a postoperative three-dimensional dental-jaw composite model, including: obtaining the movement matrix of each bone block model, adjusting the posture of each bone block model according to the movement matrix, and moving the tooth models mapped by each bone block model using the same movement matrix.

[0013] Preferably, the orthognathic treatment requirements include: a cutting method of bone blocks and changes in the position and posture of each bone block.

[0014] Preferably, under the condition that the relative posture of the tooth model and the corresponding bone block model in the initial three-dimensional dental-jaw composite model remains unchanged, the posture of each bone block model in the initial three-dimensional dental-jaw composite model is adjusted according to the orthognathic treatment requirements to obtain a postoperative three-dimensional dental-jaw composite model, including: performing virtual osteotomy on the acquired maxillary virtual model and mandibular virtual model according to the bone block cutting method in the orthognathic treatment requirements and updating the initial three-dimensional dental-jaw composite model.

[0015] Preferably, the method further includes obtaining a plurality of composite models with different dentition layouts from the initial three-dimensional dental-jaw composite model to the preoperative orthodontic target model, wherein the posture of the bone block models in the composite models with different dentition layouts is consistent with the posture of the bone block in the initial three-dimensional dental-jaw composite model.

[0016] The embodiment of the present application also provides a method for generating a correction system, comprising:

[0017] Acquire an initial three-dimensional tooth-jaw composite model, wherein the initial three-dimensional tooth-jaw composite model includes a virtual model of maxillary teeth, a virtual model of maxillary bones, a virtual model of mandibular teeth, and a virtual model of mandibular bones;

[0018] Obtaining the relative positions of the tooth model and the corresponding bone block model in the initial three-dimensional tooth-jaw composite model and the orthognathic treatment requirements; adjusting the positions of the bone block models in the initial three-dimensional tooth-jaw composite model according to the orthognathic treatment requirements while keeping the relative positions of the tooth model and the corresponding bone block model in the initial three-dimensional tooth-jaw composite model unchanged, to obtain a postoperative three-dimensional tooth-jaw composite model;

[0019] Under the condition that the relative posture relationship of each bone block model in the postoperative three-dimensional dental-jaw composite model remains unchanged, the upper and lower jaw teeth in the postoperative three-dimensional dental-jaw composite model are respectively aligned to obtain a postoperative orthodontic dental-jaw composite model;

[0020] Under the condition that the relative postures of the bone block models in the initial three-dimensional tooth-jaw composite model remain unchanged, the posture of the tooth model in the initial three-dimensional tooth-jaw composite model is adjusted to obtain a preoperative orthodontic target model; wherein the relative postures of the tooth model and the corresponding bone block model in the preoperative orthodontic target model are consistent with the relative postures of the tooth model and the corresponding bone block model in the postoperative orthodontic tooth-jaw composite model;

[0021] Manufacturing dental instruments: obtaining a series of shell-shaped dental appliances according to the preoperative orthodontic target model and obtaining a final guide plate according to the postoperative orthodontic tooth-jaw composite model.

[0022] Preferably, the relative positions of the tooth model and the corresponding bone block model in the initial three-dimensional dental-jaw composite model and the orthognathic treatment requirements are obtained, including: obtaining the FDI tooth position number corresponding to each bone block model and mapping it to the corresponding tooth model.

[0023] Preferably, under the condition that the relative posture of the tooth model and the corresponding bone block model in the initial three-dimensional dental-jaw composite model remains unchanged, the posture of each bone block model in the initial three-dimensional dental-jaw composite model is adjusted according to the orthognathic treatment needs to obtain a postoperative three-dimensional dental-jaw composite model, including: obtaining the movement matrix of each bone block model, adjusting the posture of each bone block model according to the movement matrix, and moving the tooth models mapped by each bone block model using the same movement matrix.

[0024] Preferably, the orthognathic treatment requirements include: a cutting method of bone blocks and changes in the position and posture of each bone block.

[0025] Preferably, under the condition that the relative posture of the tooth model and the corresponding bone block model in the initial three-dimensional dental-jaw composite model remains unchanged, the posture of each bone block model in the initial three-dimensional dental-jaw composite model is adjusted according to the orthognathic treatment requirements to obtain a postoperative three-dimensional dental-jaw composite model, including: performing virtual osteotomy on the acquired maxillary virtual model and mandibular virtual model according to the bone block cutting method in the orthognathic treatment requirements and updating the initial three-dimensional dental-jaw composite model.

[0026] Preferably, the method further includes obtaining a plurality of composite models with different dentition layouts from the initial three-dimensional dental-jaw composite model to the preoperative orthodontic target model, wherein the posture of the bone block models in the composite models with different dentition layouts is consistent with the posture of the bone block in the initial three-dimensional dental-jaw composite model.

[0027] Preferably, the manufacturing of dental instruments includes: using additive manufacturing to manufacture a solid model of a composite model of multiple different dentition layouts between the initial three-dimensional dental-jaw composite model and the preoperative orthodontic target model, and using hot pressing to manufacture the series of shell-shaped dental braces based on the solid model.

[0028] Preferably, the manufacturing of dental instruments comprises: generating a digital model of the series of shell-shaped dental appliances based on a composite model of multiple different dentition layouts between the initial three-dimensional dental-jaw composite model and the preoperative orthodontic target model, and manufacturing the series of shell-shaped dental appliances by means of additive manufacturing using the digital model of the series of shell-shaped dental appliances.

[0029] Preferably, the method further comprises: when it is confirmed that both the bone block model in the maxillary virtual model and the bone block model in the mandibular virtual model in the initial three-dimensional dental-jaw composite model need to be adjusted according to the orthognathic treatment requirements, adjusting the bone block model in the jaw virtual model of one of the bone block model in the maxillary virtual model and the bone block model in the mandibular virtual model in the initial three-dimensional dental-jaw composite model, and keeping the position of the bone block model in the other jaw virtual model unchanged, so as to obtain an intraoperative three-dimensional dental-jaw composite model;

[0030] Manufacturing the dental instrument also includes: obtaining an intraoperative guide plate according to the intraoperative three-dimensional tooth-jaw composite model.

[0031] Preferably, the manufacturing of dental instruments comprises: manufacturing a physical model of the intraoperative three-dimensional dental-jaw composite model and the postoperative orthodontic dental-jaw composite model by additive manufacturing, and manufacturing the intraoperative guide and the final guide by hot pressing film according to the physical model, wherein the intraoperative guide and the final guide are shell-like structures with tooth receiving cavities.

[0032] Preferably, the manufacturing of dental instruments comprises: generating digital models of the intraoperative guide and the final guide based on the intraoperative three-dimensional dental-jaw composite model and the postoperative orthodontic dental-jaw composite model, and manufacturing the intraoperative guide and the final guide by additive manufacturing using the digital models of the intraoperative guide and the final guide.

[0033] An embodiment of the present application also provides a correction system, comprising a series of shell-shaped dental appliances and a final guide plate manufactured using a correction system generation method as described in any one of the above, wherein the series of shell-shaped dental appliances are designed to gradually move the upper and lower jaws from an initial position to a target position in a step-by-step manner.

[0034] Preferably, the series of shell-shaped dental orthodontic appliances include a plurality of first shell-shaped bodies and a second shell-shaped body, the first shell-shaped body having a plurality of tooth receiving cavities for accommodating the maxillary dentition and the second shell-shaped body having a plurality of tooth receiving cavities for accommodating the mandibular dentition, the final guide plate includes a third shell-shaped body having a plurality of tooth receiving cavities for accommodating the maxillary or mandibular dentition, the occlusal surface of the third shell-shaped body extending toward the opposite jaw to form a third positioning portion with a cavity structure, the occlusal surface of the third positioning portion having an occlusal positioning groove for positioning the mandible of the opposite jaw.

[0035] Preferably, the tooth receiving cavity layout of the third shell-like body is consistent with the tooth receiving cavity layout of the shell-like body in the last shell-like dental appliance in the series of shell-like dental appliances, which is worn on the same jaw as the third shell-like body.

[0036] Preferably, the method further comprises manufacturing an intraoperative guide by using the method for generating a correction system as described above, wherein the intraoperative guide and the final guide respectively locate the positions of the upper and lower jaws during orthognathic surgery, wherein the intraoperative guide comprises a fourth shell-like body having a plurality of tooth receiving cavities for accommodating the maxillary or mandibular dentition, the occlusal surface of the fourth shell-like body extending toward the opposite jaw to form a fourth positioning portion having a cavity structure, and the occlusal surface of the fourth positioning portion having an occlusal positioning groove for positioning the mandible of the opposite jaw.

[0037] Preferably, the tooth receiving cavity layout of the fourth shell-like body is consistent with the tooth receiving cavity layout of the shell-like body in the last shell-like dental appliance in the series of shell-like dental appliances, which is worn on the same jaw as the fourth shell-like body.

[0038] Preferably, the lengths of the third positioning portion and the fourth positioning portion along the dental arch curve direction both cover all teeth of the opposing jaw, and the third positioning portion and the fourth positioning portion have occlusal positioning grooves that are arranged in a consistent manner.

[0039] Preferably, the lengths of the third positioning portion and the fourth positioning portion along the dental arch curve direction both cover all teeth of the opposing jaw, and the tooth layout corresponding to the tooth receiving cavity of the fourth shell-like body is consistent with the tooth layout corresponding to the occlusal positioning groove of the third positioning portion.

[0040] An embodiment of the present application also provides an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute a method for generating a preoperative orthodontic target model as described in any of the above, or execute a method for generating a correction system as described in any of the above.

[0041] An embodiment of the present application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements a method for generating a preoperative orthodontic target model as described in any of the above, or executes a method for generating a correction system as described in any of the above.

[0042] Compared with the prior art, the method for generating a preoperative orthodontic target model, the correction system and the method for generating the same provided by the present invention have the following advantages:

[0043] The method for generating a preoperative orthodontic target model in the present application designs the preoperative orthodontic target position based on the tooth model and the jaw model in the three-dimensional dental-jaw composite model, which solves the technical problem in the prior art that the orthodontist cannot predict the results of orthognathic surgery and cannot clearly give the preoperative orthodontic target position, and reduces the possibility of needing orthodontic correction to continue to improve the occlusion after surgery. In addition, the present application can also generate an orthognathic surgery model in the method for generating a preoperative orthodontic target model, and realizes the simultaneous completion of orthodontic and orthognathic scheme design in a virtual model, solving the unpredictability of traditional orthodontic and orthognathic combined treatment schemes that rely too much on the doctor's experience, filling the information gap between orthodontic and orthognathic doctors, and assisting doctors to jointly complete the design of orthodontic and orthognathic integrated treatment plans under the condition of information symmetry, which is of great significance to orthodontic and orthognathic combined treatment.

[0044] The correction system and generation method thereof in the present application simultaneously complete the design of preoperative orthodontic appliances and intraoperative guides under the orthodontic and orthognathic integrated treatment plan, which greatly shortens the orthodontic and orthognathic combined treatment process and ensures the precise implementation of the actual treatment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0046] Figure 1 is a flow chart of a method for generating a preoperative orthodontic target model in some embodiments of the present application;

[0047] Figure 2 is a schematic diagram of an initial three-dimensional tooth-jaw composite model in some embodiments of the present application;

[0048] Figure 3 is a schematic diagram of an initial three-dimensional tooth-jaw composite model in some embodiments of the present application;

[0049] Figure 4 is a schematic diagram of FDI tooth position numbers in some embodiments of the present application;

[0050] Figure 5 is a schematic diagram of a three-dimensional dental-jaw composite model after surgery in some embodiments of the present application;

[0051] Figure 6 is a schematic diagram of a three-dimensional dental-jaw composite model after surgery in some embodiments of the present application;

[0052] Figure 7 is a schematic diagram of a post-operative orthodontic dental-jaw composite model in some embodiments of the present application;

[0053] Figure 8 is a schematic diagram of a post-operative orthodontic dental-jaw composite model in some embodiments of the present application;

[0054] Fig. 9 is a schematic diagram of a preoperative orthodontic target model in some embodiments of the present application;

[0055] Fig.10 is a schematic diagram of a preoperative orthodontic target model in some embodiments of the present application;

[0056] Fig.11 is a flow chart of a method for generating a preoperative orthodontic target model in other embodiments of the present application;

[0057] Fig.12 is a flow chart of a method for generating a preoperative orthodontic target model in other embodiments of the present application;

[0058] Fig.13 is a flow chart of a method for generating a preoperative orthodontic target model in other embodiments of the present application;

[0059] Fig.14 is a flow chart of a method for generating a preoperative orthodontic target model in other embodiments of the present application;

[0060] Fig.15 is a schematic diagram of a graphics processor provided by one embodiment of the present application;

[0061] Fig.16 is a schematic diagram of a correction system provided by one embodiment of the present application;

[0062] Fig.17 is a schematic diagram of a surgical guide in some embodiments of the present application;

[0063] Fig.18 is a schematic diagram of a surgical guide in some embodiments of the present application;

[0064] Fig.19 is a schematic diagram of a surgical guide in some embodiments of the present application;

[0065] Fig. 20 It is a schematic diagram of the intraoperative guide in some embodiments of the present application. DETAILED DESCRIPTION

[0066] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, each embodiment of the present application will be described in detail below in conjunction with the accompanying drawings. However, it will be appreciated by those skilled in the art that in each embodiment of the present application, many technical details are proposed in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present application can also be implemented. The division of the following embodiments is for the convenience of description, and the specific implementation of the present application should not constitute any limitation, and the various embodiments can be combined with each other and referenced to each other without contradiction.

[0067] The "posterior tooth area" mentioned in each embodiment of the present application is defined according to the classification of teeth in the second edition of "Introduction to Stomatology" published by Peking University Medical Press, pages 36-38, including premolars and molars, which are displayed as teeth 4-8 by the FDI marking method, and the teeth 1-3 in the anterior tooth area by the FDI marking method. The teeth in the anterior tooth area include central incisors, lateral incisors, and canines. In addition, for the teeth in the deciduous tooth stage, the "posterior tooth area" is defined according to the classification of deciduous teeth in the second edition of "Introduction to Stomatology" published by Peking University Medical Press, pages 40-41, including three categories: deciduous incisors, deciduous canines, and deciduous molars, among which deciduous incisors include deciduous central teeth and deciduous lateral incisors, and deciduous molars include first deciduous molars and second deciduous molars.

[0068] The shell-like body is provided with a number of cavities for accommodating multiple teeth, and is divided into lingual surface, labial surface, mesial surface and distal surface. Among them, "lingual surface" is named according to the names of various surfaces of the crown in the 2nd edition of "Introduction to Stomatology" published by Peking University Medical Press, pages 35-36, where the labial surface and buccal surface are the sides of the crown of the front teeth close to the lips, and the sides of the crown of the back teeth close to the cheek are called buccal surfaces. The lingual surface is the side of the crown of the front teeth and the back teeth close to the tongue, collectively referred to as the lingual surface. The mesial surface and the distal surface are the two surfaces adjacent to the crown of the adjacent teeth, collectively referred to as the adjacent surfaces. The side closer to the midline of the face is called the mesial surface, and the side farther from the midline of the face is called the distal surface.

[0069] Certain terms used in the following description are for convenience only and are not intended to be limiting. The words "right", "left", "lower", and "upper" designate directions in the accompanying drawings to which reference is made. The words "front", "back", "upper", "lower", "inner", "outer" and related words and / or phrases are used to designate preferred positions and orientations within the human body to which reference is made and are not intended to be limiting. The terminology includes the words listed above, their derivatives, and words of similar meaning.

[0070] The various implementations of the present application are described below in conjunction with the accompanying drawings.

[0071] refer to Figure 1As shown, an embodiment of the present application provides a flowchart of a method for generating a preoperative orthodontic target model, the method comprising the following steps:

[0072] Step S101: obtaining an initial three-dimensional tooth-jaw composite model, wherein the initial three-dimensional tooth-jaw composite model includes a virtual model of maxillary teeth, a virtual model of maxillary bones, a virtual model of mandibular teeth, and a virtual model of mandibular bones.

[0073] Step S102: Obtaining the relative positions of the tooth model and the corresponding bone model in the initial three-dimensional tooth-jaw composite model and the orthognathic treatment requirements.

[0074] Step S103: Under the condition that the relative postures of the tooth model and the corresponding bone block model in the initial three-dimensional tooth-jaw composite model remain unchanged, the postures of the bone block models in the initial three-dimensional tooth-jaw composite model are adjusted according to the orthognathic treatment requirements to obtain a postoperative three-dimensional tooth-jaw composite model.

[0075] Step S104: Under the condition that the relative posture relationship of each bone block model in the postoperative three-dimensional dental-jaw composite model remains unchanged, the upper and lower teeth in the postoperative three-dimensional dental-jaw composite model are respectively aligned to obtain a postoperative orthodontic dental-jaw composite model.

[0076] Step S105: Under the condition that the relative postures of the bone block models in the initial three-dimensional dental-jaw composite model remain unchanged, the posture of the tooth model in the initial three-dimensional dental-jaw composite model is adjusted to obtain a preoperative orthodontic target model; wherein the relative postures of the tooth model and the corresponding bone block model in the preoperative orthodontic target model are consistent with the relative postures of the tooth model and the corresponding bone block model in the postoperative orthodontic dental-jaw composite model.

[0077] Further, in step 101, reference Figure 2 and Figure 3The initial three-dimensional tooth-jaw composite model 100 shown includes a virtual model 1 of maxillary teeth, a virtual model 2 of maxillary bones, a virtual model 3 of mandibular teeth, and a virtual model 4 of mandibular bones. The initial three-dimensional tooth-jaw composite model 100 can be obtained in a variety of ways, for example, extracting the tooth model (including crowns and roots) and the jaw model in the CBCT or spiral CT data, and obtaining the crown model of each tooth according to the intraoral scan data. The tooth model and the jaw model in the CBCT or spiral CT data are converted to the coordinate system of the intraoral scan data, so that the tooth model in the CBCT or spiral CT data coincides with the crown model in the intraoral scan data. The tooth model in the aligned CBCT or spiral CT data and the crown model in the intraoral scan data are spliced ​​and fused, and the tooth fusion model and the converted jaw model are combined to form a new model data, that is, the initial three-dimensional tooth-jaw composite model 100 in this application.

[0078] Furthermore, step S102: obtaining the relative posture of the tooth model and the corresponding bone block model in the initial three-dimensional dental-maxillary composite model 100 and the orthognathic treatment requirements, wherein the orthognathic treatment requirements include: the cutting method of the bone blocks and the changes in the posture of each bone block. The orthognathic treatment requirements are the orthognathic treatment requirements corresponding to the patient given by the orthognathic surgeon or obtained by machine learning. The bone block cutting method includes the orthognathic corresponding surgical procedure, that is, the cutting position and the number of cutting blocks for the upper and lower jaws. Specifically, virtual osteotomy is performed on the maxillary virtual model 2 and the mandibular virtual model 4 in the initial three-dimensional dental-maxillary composite model 100 and the initial three-dimensional dental-maxillary composite model is updated.

[0079] In addition, step S102 also includes obtaining the FDI tooth position number corresponding to each bone block model and mapping it to the corresponding tooth model. Figure 4 As shown, each tooth model in the initial three-dimensional tooth-jaw composite model 100 has an FDI number, and each bone block model after segmentation contains an FDI tooth position number, that is, each bone block model corresponds to zero, one or more tooth models.

[0080] For further reference, Figure 5 and Figure 6As shown, in step S103, under the condition that the relative posture of the tooth model and the corresponding bone block model in the initial three-dimensional tooth-jaw composite model 100 remains unchanged, the posture of each bone block model in the initial three-dimensional tooth-jaw composite model 100 is adjusted according to the orthognathic treatment needs to obtain a postoperative three-dimensional tooth-jaw composite model 200, including: obtaining the movement matrix of each bone block model, adjusting the posture of each bone block model according to the movement matrix, and moving the tooth model mapped by each bone block model using the same movement matrix. The cut bone block model is deleted or moved according to the orthognathic treatment needs, and the movement method includes moving in 6 degrees of freedom. Each bone block model uses the same movement corresponding to the tooth model, that is, the relative posture of the bone block model and the corresponding tooth model remains unchanged.

[0081] Further, refer to Figure 7 and Figure 8 As shown, step S104: under the condition that the relative posture relationship of each bone block model in the postoperative three-dimensional dental-jaw composite model 200 remains unchanged, the upper and lower teeth in the postoperative three-dimensional dental-jaw composite model 200 are respectively aligned to obtain a postoperative orthodontic dental-jaw composite model 300, wherein the relative posture relationship of each bone block model remains unchanged, and each bone block model can be locked with each other, and the spatial coordinates remain unchanged. The requirements for aligning the teeth in the postoperative three-dimensional dental-jaw composite model 200 can be pre-set based on industry specifications, or the operator moves the teeth in the postoperative three-dimensional dental-jaw composite model 200, and after the movement, the tooth models in the maxillary tooth virtual model 1 and the mandibular tooth virtual model 3 are occluded and docked. Specifically, the alignment of the mandibular teeth includes: respectively leveling the Spee curve, coordinating the upper and lower dental arch shapes, eliminating the secondary tooth axis inclination caused by the abnormal position of the upper and lower jaws, and adjusting the upper and lower jaw occlusion relationship. That is, each tooth model is translated and rotated around the virtual tooth rotation center, so as to finally achieve neat teeth arrangement, flat Spee curve, coordinated upper and lower dental arches, and correct occlusal relationship of upper and lower jaw teeth.

[0082] Further, refer to Fig. 9 and Fig.10 As shown, step S105: under the condition that the relative postures of each bone block model in the initial three-dimensional dental-jaw composite model 100 remain unchanged, adjust the posture of the tooth model in the initial three-dimensional dental-jaw composite model 100 to obtain the preoperative orthodontic target model 400; wherein, the relative posture of the tooth model and the corresponding bone block model in the preoperative orthodontic target model 400 is consistent with the relative posture of the tooth model and the corresponding bone block model in the postoperative orthodontic dental-jaw composite model 300.

[0083] refer to Fig.11As shown, another embodiment of the present application provides a flowchart of a preoperative orthodontic target model, and the method also includes step S106: obtaining a plurality of composite models with different dentition layouts from the initial three-dimensional dental-jaw composite model to the preoperative orthodontic target model, wherein the posture of the bone block model in the composite models with the plurality of different dentition layouts is consistent with the posture of the bone block in the initial three-dimensional dental-jaw composite model.

[0084] refer to Fig.12 As shown, in some embodiments, a flowchart of a method for generating a correction system may also be provided, the method comprising the following steps:

[0085] Step S201: obtaining an initial three-dimensional tooth-jaw composite model, wherein the initial three-dimensional tooth-jaw composite model includes a virtual model of maxillary teeth, a virtual model of maxillary bones, a virtual model of mandibular teeth, and a virtual model of mandibular bones.

[0086] Step S202: Obtaining the relative positions of the tooth model and the corresponding bone model in the initial three-dimensional tooth-jaw composite model and the orthognathic treatment requirements.

[0087] Step S203: Under the condition that the relative postures of the tooth model and the corresponding bone block model in the initial three-dimensional tooth-jaw composite model remain unchanged, the postures of the bone block models in the initial three-dimensional tooth-jaw composite model are adjusted according to the orthognathic treatment requirements to obtain a postoperative three-dimensional tooth-jaw composite model.

[0088] Step S204: Under the condition that the relative posture relationship of each bone block model in the postoperative three-dimensional dental-jaw composite model remains unchanged, the upper and lower teeth in the postoperative three-dimensional dental-jaw composite model are respectively aligned to obtain a postoperative orthodontic dental-jaw composite model.

[0089] Step S205: Under the condition that the relative postures of the bone block models in the initial three-dimensional dental-jaw composite model remain unchanged, the posture of the tooth model in the initial three-dimensional dental-jaw composite model is adjusted to obtain a preoperative orthodontic target model; wherein the relative postures of the tooth model and the corresponding bone block model in the preoperative orthodontic target model are consistent with the relative postures of the tooth model and the corresponding bone block model in the postoperative orthodontic dental-jaw composite model.

[0090] Step S206: manufacturing dental instruments: obtaining a series of shell-shaped dental appliances according to the preoperative orthodontic target model and obtaining a final guide according to the postoperative orthodontic tooth-jaw composite model.

[0091] Steps S201 , S202 , S203 , S204 and S205 are consistent with the corresponding implementations of steps S101 , S102 , S103 , S104 and S105 of a method for generating a preoperative orthodontic target model, and are not elaborated herein.

[0092] Further, refer to Fig.13 As shown, step 205 and step 206 also include step 2051: obtaining a plurality of composite models of different dentition layouts between the initial three-dimensional dental-jaw composite model and the preoperative orthodontic target model. In the corresponding step 206 of this embodiment, manufacturing dental appliances includes obtaining a series of shell-shaped dental orthodontic appliances according to the composite models of the plurality of different dentition layouts and obtaining a final guide plate according to the postoperative orthodontic dental-jaw composite model.

[0093] In some embodiments, manufacturing dental instruments includes: using additive manufacturing to manufacture a solid model of a composite model with multiple different dentition layouts from an initial three-dimensional dental-jaw composite model to a preoperative orthodontic target model, and using hot pressing to manufacture the series of shell-shaped dental braces based on the solid model.

[0094] In other embodiments, the manufacturing of dental instruments includes: generating a digital model of the series of shell-shaped dental appliances based on a composite model of multiple different dentition layouts from an initial three-dimensional dental-jaw composite model to a preoperative orthodontic target model, and manufacturing the series of shell-shaped dental appliances using the digital model of the series of shell-shaped dental appliances by additive manufacturing.

[0095] In other embodiments, reference Fig.14As shown, under the condition that the relative posture of the tooth model and the corresponding bone block model in the initial three-dimensional tooth-jaw composite model remains unchanged, the posture of each bone block model in the initial three-dimensional tooth-jaw composite model is adjusted according to the orthognathic treatment requirements to obtain a postoperative three-dimensional tooth-jaw composite model, which is specifically divided into steps 2031 and 2032, wherein step 2031: when it is confirmed according to the orthognathic treatment requirements that both the bone block model in the maxillary virtual model and the bone block model in the mandibular virtual model in the initial three-dimensional tooth-jaw composite model need to be adjusted, the bone block model in the jaw virtual model of one of the bone block model in the maxillary virtual model and the bone block model in the mandibular virtual model in the initial three-dimensional tooth-jaw composite model is adjusted, and the posture of the bone block model in the other jaw virtual model remains unchanged, to obtain an intraoperative three-dimensional tooth-jaw composite model. Then, step 2032 is to adjust the bone block model of one jaw whose posture in the intraoperative three-dimensional tooth-jaw composite model remains unchanged, and the posture of the bone block model in the other jaw virtual model remains unchanged, to obtain a postoperative three-dimensional tooth-jaw composite model. For example, the bone block model in the maxillary virtual model in the initial three-dimensional tooth-jaw composite model is first adjusted, and the relative position of the bone block model in the mandibular virtual model in the initial three-dimensional tooth-jaw composite model remains unchanged, so as to obtain the intraoperative three-dimensional tooth-jaw composite model. Then, the bone block model in the mandibular virtual model in the intraoperative three-dimensional tooth-jaw composite model is adjusted, and the relative position of the bone block model in the maxillary virtual model in the intraoperative three-dimensional tooth-jaw composite model remains unchanged, so as to obtain the postoperative three-dimensional tooth-jaw composite model. In this embodiment, manufacturing the dental instrument in step 206 also includes: obtaining an intraoperative guide plate according to the intraoperative three-dimensional tooth-jaw composite model.

[0096] Furthermore, the manufacturing of dental instruments in the above step 206 includes: manufacturing a physical model of the intraoperative three-dimensional dental-jaw composite model and the postoperative orthodontic dental-jaw composite model by additive manufacturing, and manufacturing the intraoperative guide and the final guide by hot pressing film according to the physical model, wherein the intraoperative guide and the final guide are shell-like structures with tooth receiving cavities.

[0097] Furthermore, the manufacturing of the dental instrument in the above step 206 includes: generating digital models of the intraoperative guide and the final guide based on the intraoperative three-dimensional tooth-jaw composite model and the postoperative orthodontic tooth-jaw composite model, and manufacturing the intraoperative guide and the final guide by additive manufacturing using the digital models of the intraoperative guide and the final guide.

[0098] It is worth mentioning that all modules involved in this embodiment are logic modules. In practical applications, a logic unit can be a physical unit, a part of a physical unit, or a combination of multiple physical units. In addition, in order to highlight the innovative part of the present invention, this embodiment does not introduce units that are not closely related to solving the technical problem proposed by the present invention, but this does not mean that there are no other units in this embodiment.

[0099] One embodiment of the present invention relates to an electronic device, such as Fig.15 As shown, it includes at least one processor 401; and

[0100] A memory 402 is communicatively connected to the at least one processor 401; wherein,

[0101] The memory 402 stores instructions that can be executed by the at least one processor 401 . The instructions are executed by the at least one processor 401 so that the at least one processor 401 can perform a method for generating a shell-shaped dental appliance.

[0102] Among them, the memory and the processor are connected in a bus manner, and the bus may include any number of interconnected buses and bridges, and the bus connects various circuits of one or more processors and memories together. The bus can also connect various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface between the bus and the transceiver. The transceiver can be one element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices on a transmission medium. The data processed by the processor is transmitted on a wireless medium via an antenna, and further, the antenna also receives data and transmits the data to the processor.

[0103] The processor is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions. Memory can be used to store data used by the processor when performing operations.

[0104] One embodiment of the present invention relates to a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the above method embodiment is implemented.

[0105] That is, those skilled in the art can understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including a number of instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0106] In other embodiments of the present application, reference is made to Fig.16 As shown, a correction system can also be provided, including a series of shell-shaped dental appliances and surgical guides manufactured by the generation method of the correction system in any of the above embodiments, and the surgical guides include a final guide or an intraoperative guide and a final guide. The series of shell-shaped dental appliances are designed to gradually move the upper and lower jaws from the initial position to the target position in a step-by-step manner, and the target position is a decompensation target position. The series of shell-shaped dental appliances correspond to the correction stage K1, and the surgical guide corresponds to the surgical stage K. A series of shell-shaped dental appliances are designed to gradually move the upper and lower jaws from an initial position to a target position in a step-by-step manner, wherein the series of shell-shaped dental appliances include an initial stage appliance S1, an intermediate stage appliance S2, and a target stage appliance S3, which are worn in sequence, and the initial stage appliance S1, the intermediate stage appliance S2, and the target stage appliance S3 each include at least one first shell-shaped body 1a having a plurality of tooth receiving cavities for accommodating the maxillary dentition and at least one second shell-shaped body 2a having a plurality of tooth receiving cavities for accommodating the mandibular dentition, and further, the first shell-shaped body 1a and the second shell-shaped body 2a in the same step respectively wrap all the upper and lower jaw dentitions and provide correction force to the upper and lower jaw dentitions. The surgical guide has a dentition receiving groove that is consistent with the layout of the tooth receiving cavity of at least one shell-shaped body in the target stage appliance S3.

[0107] Specifically, refer to Fig.17 and Fig.18As shown, a series of shell-shaped dental appliances are used for preoperative orthodontics, that is, they are used before the final guide 33a. The final guide 33a and the first shell-shaped body 1a or the second shell-shaped body 2a in the target stage appliance S3 in a series of shell-shaped dental appliances are sequentially worn on the dentition of the same tooth layout. In this embodiment, the dentition of the same tooth layout is specifically that the tooth layout at the end of wearing the first shell-shaped body 1a and / or the second shell-shaped body 2a is consistent with the tooth layout when the final guide 33a is worn. For example, when the final guide 33a is worn on the maxillary dentition, the dentition layout corresponding to the dentition receiving groove of the final guide 33a is consistent with the dentition layout of the first shell-shaped body 1a in the target stage appliance S3. Alternatively, when the final guide 33a is worn on the mandibular dentition, the dentition layout corresponding to the dentition receiving groove of the final guide 33a is consistent with the dentition layout of the second shell-shaped body 2a in the target stage appliance S3.

[0108] In some embodiments, continue Fig.19 and Fig. 20 As shown, the final guide plate 33a includes a plurality of dentition receiving grooves for accommodating the maxillary or mandibular dentition, and the dentition receiving grooves wrap part of the crowns of all teeth on the dentition, that is, the dentition receiving grooves 331 of the final guide plate 33a are similar to the dentition receiving cavity in the first shell-like body 1a or the dentition receiving cavity in the second shell-like body 2a, but the tooth receiving grooves 331 do not have a structure for applying a correction force to the teeth, and the dentition receiving grooves 331 on the final guide plate 33a wrap part of the crowns of the teeth, which may be 1 / 3-4 / 5 of the dentition crowns, and of course, all the crowns may be wrapped when the gums are not affected. The occlusal surface of the final guide plate 33a extends toward the direction of the opposing jaw to form a third positioning portion 333 with a cavity structure, and the occlusal surface of the third positioning portion 333 has an occlusal positioning groove 3331 for positioning the jawbone of the opposing jaw. The occlusal positioning groove 3331 may be a groove structure that is consistent with the shape of the opposing teeth and can accommodate the opposing teeth. The occlusal positioning groove 3331 at least accommodates 1 / 3 of the crown of the opposing tooth. In addition, the distance between the dentition receiving groove 331 of the surgical final guide plate 33a and the occlusal positioning groove 3331 in the sagittal direction is the target position of the orthognathic surgery.

[0109] For further information, please refer to Fig.18 As shown, the third positioning portion 333 is an integrated cavity structure, and the length of the third positioning portion 333 along the dental arch curve direction covers all teeth of the opposing jaw. Fig.17 As shown, the third positioning portion 333 is a cavity structure arranged at intervals, and the length of the third positioning portion 333 along the direction of the dental arch curve covers part of the teeth of the opposing jaw.

[0110] In other embodiments, reference Fig.19 and Fig. 20As shown, when both the upper and lower jaws of the patient need to be adjusted, in addition to the final guide 33a, the surgical guide also includes an intraoperative guide 34a having a plurality of dentition receiving grooves 341 for accommodating the maxillary or mandibular dentition. The final guide 33a and the intraoperative guide 34a are used in turn in orthognathic surgery to locate the upper and lower jaws. Similarly, the dentition receiving grooves 341 of the intraoperative guide 34a wrap around partial crowns of all teeth on the dentition, that is, the dentition receiving grooves 341 of the intraoperative guide 34a are similar in structure to the dentition receiving cavity in the first shell-like body 1a or the dentition receiving cavity in the second shell-like body 2a, but the tooth receiving grooves 341 do not have a structure for applying corrective force to the teeth, and the dentition receiving grooves 341 on the intraoperative guide 34a wrap around partial crowns of the teeth, which may be 1 / 3-4 / 5 of the dentition crowns. Of course, all crowns may also be wrapped without affecting the gums. The occlusal surface of the intraoperative guide plate 34a extends toward the direction of the opposing jaw to form a fourth positioning portion 343 with a cavity structure, and the occlusal surface of the fourth positioning portion 343 has an occlusal positioning groove 3431 for positioning the mandibular bone of the opposing jaw. The occlusal positioning groove 3431 can be a groove structure that is consistent with the shape of the opposing teeth and can accommodate the opposing teeth. The occlusal positioning groove 3431 accommodates at least 1 / 3 of the crowns of the opposing teeth. In addition, the sagittal distance between the dentition receiving groove 341 of the intraoperative guide plate 34a and the occlusal positioning groove 3431 is the target position of the orthognathic surgery. Furthermore, the fourth positioning portion 343 is an integrated cavity structure, and the length of the fourth positioning portion 343 along the direction of the dental arch curve covers all the teeth of the opposing jaw. Alternatively, the fourth positioning portion 343 is a cavity structure arranged at intervals, and the length of the fourth positioning portion 343 along the direction of the dental arch curve covers part of the teeth of the opposing jaw.

[0111] Furthermore, in another embodiment, the final operation guide 33a and the intraoperative guide 34a can be worn on the same jaw, that is, the dentition receiving groove of the final operation guide 33a and the dentition receiving groove of the intraoperative guide 34a accommodate the same dentition. For example, both are worn on the maxilla or both are worn on the mandible. Specifically, when the final operation guide 33a and the intraoperative guide 34a are both worn on the maxilla, and when the patient first adjusts the maxilla, the occlusal positioning groove 3431 of the intraoperative guide 34a is first placed on the dentition of the mandibular teeth, and the free maxillary bone block is placed in the dentition receiving groove of the intraoperative guide 34a, and the dentition receiving groove of the intraoperative guide 34a is used to locate the surgical target position of the maxillary bone. After the maxillary bone is bound to the target position, the intraoperative guide 34a is removed, and the dentition receiving groove of the final guide 33a is worn on the maxillary dentition, and the occlusal positioning groove 3331 of the final guide 33a is used to position the free bone block of the mandible, and the occlusal positioning groove 3331 of the final guide 33a can position the mandible to the surgical target position. In this case, the third positioning portion 333 and the fourth positioning portion 343 have dentition receiving grooves that are arranged in a consistent manner. Alternatively, when both the final guide 33a and the intraoperative guide 34a are worn on the maxillary bone, and when the patient first adjusts the mandible, the dentition receiving groove of the intraoperative guide 34a is first worn on the maxillary dentition, and the occlusal positioning groove 3431 of the intraoperative guide 34a is used to position the free bone block of the mandible, and the occlusal positioning groove 3431 of the intraoperative guide 34a can position the mandible to the surgical target position. After the mandibular bone is bound to the target position, the intraoperative guide plate 34a is removed, the occlusal positioning groove 3331 of the final surgical guide plate 33a is placed on the mandibular teeth, and the free maxillary bone block is placed in the dentition receiving groove of the final surgical guide plate 33a, and the dentition receiving groove of the final surgical guide plate 33a is used to locate the surgical target position of the maxillary bone. In this case, the third positioning portion 333 and the fourth positioning portion 343 have occlusal positioning grooves arranged in a consistent manner.

[0112] Furthermore, in other embodiments, the final guide plate 33a and the intraoperative guide plate 34a can be worn on different jaws, that is, the dentition receiving grooves of the final guide plate 33a and the dentition receiving grooves of the intraoperative guide plate 34a accommodate different dentitions. For example, when the patient first adjusts the upper jaw, the dentition receiving grooves of the intraoperative guide plate 34a are first placed on the lower jaw dentition, and the free upper jaw bone block is placed in the occlusal positioning groove 3431 of the intraoperative guide plate 34a, and the occlusal positioning groove 3431 of the intraoperative guide plate 34a is used to locate the surgical target position of the upper jaw. After the maxillary bone is bound to the target position, the intraoperative guide plate 34a is removed, the dentition receiving groove of the final surgical guide plate 33a is worn on the maxillary dentition, and the occlusal positioning groove 3331 of the final surgical guide plate 33a is used to position the free bone block of the mandible, and the occlusal positioning groove 3331 of the final surgical guide plate 33a can position the mandible to the surgical target position. In this case, the tooth layout corresponding to the tooth receiving groove of the final surgical guide plate 33a is consistent with the tooth layout corresponding to the occlusal positioning groove of the final surgical guide plate 33a.

[0113] It should be noted that the above embodiments can be freely combined as needed to form different new implementation plans without causing any contradiction. The implementation plans formed by such combination are all within the protection scope of the present invention. In order to save the length of the application text, they will not be described in detail here.

[0114] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

[0115] Similarly, the above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for generating a preoperative orthodontic target model, characterized in that: include: Acquire an initial three-dimensional tooth-jaw composite model, wherein the initial three-dimensional tooth-jaw composite model includes a virtual model of maxillary teeth, a virtual model of maxillary bones, a virtual model of mandibular teeth, and a virtual model of mandibular bones; Obtaining the relative positions of the tooth model and the corresponding bone block model in the initial three-dimensional tooth-jaw composite model and the orthognathic treatment requirements; adjusting the positions of the bone block models in the initial three-dimensional tooth-jaw composite model according to the orthognathic treatment requirements while keeping the relative positions of the tooth model and the corresponding bone block model in the initial three-dimensional tooth-jaw composite model unchanged, to obtain a postoperative three-dimensional tooth-jaw composite model; Under the condition that the relative posture relationship of each bone block model in the postoperative three-dimensional dental-jaw composite model remains unchanged, the upper and lower jaw teeth in the postoperative three-dimensional dental-jaw composite model are respectively aligned to obtain a postoperative orthodontic dental-jaw composite model; Under the condition that the relative postures of the bone block models in the initial three-dimensional dental-jaw composite model remain unchanged, the posture of the tooth model in the initial three-dimensional dental-jaw composite model is adjusted to obtain a preoperative orthodontic target model; wherein the relative postures of the tooth model and the corresponding bone block model in the preoperative orthodontic target model are consistent with the relative postures of the tooth model and the corresponding bone block model in the postoperative orthodontic dental-jaw composite model.

2. The method for generating a preoperative orthodontic target model according to claim 1, characterized in that: The alignment of the upper and lower teeth in the postoperative three-dimensional dental-jaw composite model includes: respectively leveling the Spee curve, coordinating the upper and lower dental arch shapes, relieving the secondary tooth axis inclination caused by the abnormal position of the upper and lower jaws, and adjusting the upper and lower jaw occlusion relationship.

3. The method for generating a preoperative orthodontic target model according to claim 1, characterized in that: Obtaining the relative positions of the tooth model and the corresponding bone block model in the initial three-dimensional tooth-jaw composite model and the orthognathic treatment requirements includes: obtaining the FDI tooth position number corresponding to each bone block model and mapping it to the corresponding tooth model.

4. The method for generating a preoperative orthodontic target model according to claim 3, characterized in that: Under the condition that the relative posture of the tooth model and the corresponding bone block model in the initial three-dimensional dental-jaw composite model remains unchanged, the posture of each bone block model in the initial three-dimensional dental-jaw composite model is adjusted according to the needs of orthognathic treatment to obtain a postoperative three-dimensional dental-jaw composite model, including: obtaining a movement matrix of each bone block model, adjusting the posture of each bone block model according to the movement matrix, and moving the tooth model mapped by each bone block model using the same movement matrix.

5. The method for generating a preoperative orthodontic target model according to claim 1, characterized in that: The orthognathic treatment requirements include: the cutting method of the bone blocks and the changes in the posture of each of the bone blocks.

6. The method for generating a preoperative orthodontic target model according to claim 5, characterized in that: Under the condition that the relative posture of the tooth model and the corresponding bone block model in the initial three-dimensional dental-jaw composite model remains unchanged, the posture of each bone block model in the initial three-dimensional dental-jaw composite model is adjusted according to the orthognathic treatment requirements to obtain a postoperative three-dimensional dental-jaw composite model, including: performing virtual osteotomy on the acquired maxillary virtual model and mandibular virtual model according to the bone block cutting method in the orthognathic treatment requirements and updating the initial three-dimensional dental-jaw composite model.

7. The method for generating a preoperative orthodontic target model according to claim 1, characterized in that: It also includes obtaining a plurality of composite models with different dentition layouts from the initial three-dimensional dental-jaw composite model to the preoperative orthodontic target model, wherein the posture of the bone block models in the composite models with different dentition layouts is consistent with the posture of the bone block in the initial three-dimensional dental-jaw composite model.

8. A method for generating a correction system, characterized in that: include: Acquire an initial three-dimensional tooth-jaw composite model, wherein the initial three-dimensional tooth-jaw composite model includes a virtual model of maxillary teeth, a virtual model of maxillary bones, a virtual model of mandibular teeth, and a virtual model of mandibular bones; Obtaining the relative positions of the tooth model and the corresponding bone block model in the initial three-dimensional tooth-jaw composite model and the orthognathic treatment requirements; adjusting the positions of the bone block models in the initial three-dimensional tooth-jaw composite model according to the orthognathic treatment requirements while keeping the relative positions of the tooth model and the corresponding bone block model in the initial three-dimensional tooth-jaw composite model unchanged, to obtain a postoperative three-dimensional tooth-jaw composite model; Under the condition that the relative posture relationship of each bone block model in the postoperative three-dimensional dental-jaw composite model remains unchanged, the upper and lower jaw teeth in the postoperative three-dimensional dental-jaw composite model are respectively aligned to obtain a postoperative orthodontic dental-jaw composite model; Under the condition that the relative postures of the bone block models in the initial three-dimensional tooth-jaw composite model remain unchanged, the posture of the tooth model in the initial three-dimensional tooth-jaw composite model is adjusted to obtain a preoperative orthodontic target model; wherein the relative postures of the tooth model and the corresponding bone block model in the preoperative orthodontic target model are consistent with the relative postures of the tooth model and the corresponding bone block model in the postoperative orthodontic tooth-jaw composite model; Manufacturing dental instruments: obtaining a series of shell-shaped dental appliances according to the preoperative orthodontic target model and obtaining a final guide plate according to the postoperative orthodontic tooth-jaw composite model.

9. The method for generating a correction system according to claim 8, characterized in that: Obtaining the relative positions of the tooth model and the corresponding bone block model in the initial three-dimensional tooth-jaw composite model and the orthognathic treatment requirements includes: obtaining the FDI tooth position number corresponding to each bone block model and mapping it to the corresponding tooth model.

10. The method for generating a correction system according to claim 9, characterized in that: Under the condition that the relative posture of the tooth model and the corresponding bone block model in the initial three-dimensional dental-jaw composite model remains unchanged, the posture of each bone block model in the initial three-dimensional dental-jaw composite model is adjusted according to the needs of orthognathic treatment to obtain a postoperative three-dimensional dental-jaw composite model, including: obtaining a movement matrix of each bone block model, adjusting the posture of each bone block model according to the movement matrix, and moving the tooth model mapped by each bone block model using the same movement matrix.

11. The method for generating a correction system according to claim 8, characterized in that: The orthognathic treatment requirements include: the cutting method of the bone blocks and the changes in the posture of each of the bone blocks.

12. The method for generating a correction system according to claim 11, characterized in that: Under the condition that the relative posture of the tooth model and the corresponding bone block model in the initial three-dimensional dental-jaw composite model remains unchanged, the posture of each bone block model in the initial three-dimensional dental-jaw composite model is adjusted according to the orthognathic treatment requirements to obtain a postoperative three-dimensional dental-jaw composite model, including: performing virtual osteotomy on the acquired maxillary virtual model and mandibular virtual model according to the bone block cutting method in the orthognathic treatment requirements and updating the initial three-dimensional dental-jaw composite model.

13. The method for generating a correction system according to claim 9, characterized in that: It also includes obtaining a plurality of composite models with different dentition layouts from the initial three-dimensional dental-jaw composite model to the preoperative orthodontic target model, wherein the posture of the bone block models in the composite models with different dentition layouts is consistent with the posture of the bone block in the initial three-dimensional dental-jaw composite model.

14. The method for generating a correction system according to claim 13, characterized in that: The manufacturing of dental instruments includes: using additive manufacturing to manufacture a solid model of a composite model with multiple different dentition layouts between the initial three-dimensional tooth-jaw composite model and the preoperative orthodontic target model, and using hot pressing to manufacture the series of shell-shaped dental orthodontic appliances based on the solid model.

15. The method for generating a correction system according to claim 13, characterized in that: The manufacturing of dental instruments includes: generating a digital model of the series of shell-shaped dental appliances based on a composite model of multiple different dentition layouts between the initial three-dimensional dental-jaw composite model and the preoperative orthodontic target model, and manufacturing the series of shell-shaped dental appliances by using the digital model of the series of shell-shaped dental appliances in an additive manufacturing manner.

16. The method for generating a correction system according to claim 9, characterized in that: Also includes: When it is confirmed that both the bone block model in the maxillary virtual model and the bone block model in the mandibular virtual model in the initial three-dimensional dental-jaw composite model need to be adjusted according to the orthognathic treatment requirements, the bone block model in the jaw virtual model of one of the bone block model in the maxillary virtual model and the bone block model in the mandibular virtual model in the initial three-dimensional dental-jaw composite model is adjusted, and the posture of the bone block model in the other jaw virtual model remains unchanged, so as to obtain an intraoperative three-dimensional dental-jaw composite model; Manufacturing the dental instrument also includes: obtaining an intraoperative guide plate according to the intraoperative three-dimensional tooth-jaw composite model.

17. The method for generating a correction system according to claim 16, characterized in that: The manufacturing of dental instruments includes: using additive manufacturing to manufacture the physical models of the intraoperative three-dimensional tooth-jaw composite model and the postoperative orthodontic tooth-jaw composite model, and using hot pressing to manufacture the intraoperative guide plate and the final guide plate according to the physical models, wherein the intraoperative guide plate and the final guide plate are shell-shaped structures with tooth receiving cavities.

18. The method for generating a correction system according to claim 16, characterized in that: The manufacturing of dental instruments includes: generating digital models of the intraoperative guide and the final guide according to the intraoperative three-dimensional tooth-jaw composite model and the postoperative orthodontic tooth-jaw composite model, and manufacturing the intraoperative guide and the final guide by means of additive manufacturing using the digital models of the intraoperative guide and the final guide.

19. A correction system, characterized in that: It comprises a series of shell-shaped dental appliances and final guide plates manufactured by the method for generating a correction system as described in any one of claims 8 to 18, wherein the series of shell-shaped dental appliances are designed to gradually move the upper and lower jaws from an initial position to a target position in a step-by-step manner.

20. The correction system according to claim 19, characterized in that: The series of shell-shaped dental orthodontic appliances include a plurality of first shell-shaped bodies and a second shell-shaped body, the first shell-shaped body having a plurality of tooth receiving cavities for accommodating the maxillary dentition and the second shell-shaped body having a plurality of tooth receiving cavities for accommodating the mandibular dentition, the final guide plate includes a third shell-shaped body having a plurality of tooth receiving cavities for accommodating the maxillary or mandibular dentition, the occlusal surface of the third shell-shaped body extending toward the opposite jaw to form a third positioning portion with a cavity structure, the occlusal surface of the third positioning portion having an occlusal positioning groove for positioning the mandible of the opposite jaw.

21. The correction system according to claim 20, characterized in that: The tooth receiving cavity layout of the third shell-like body is consistent with the tooth receiving cavity layout of the shell-like body in the last shell-like dental appliance in the series of shell-like dental appliances, which is worn on the same jaw as the third shell-like body.

22. The correction system according to claim 20, characterized in that: It also includes manufacturing an intraoperative guide using the generation method of the correction system as described in claim 18, wherein the intraoperative guide and the final guide respectively locate the positions of the upper and lower jaws during orthognathic surgery, wherein the intraoperative guide includes a fourth shell-like body having a plurality of tooth receiving cavities for accommodating the maxillary or mandibular dentition, the occlusal surface of the fourth shell-like body extending toward the opposite jaw to form a fourth positioning portion with a cavity structure, and the occlusal surface of the fourth positioning portion having an occlusal positioning groove for positioning the mandible of the opposite jaw.

23. The correction system according to claim 22, characterized in that: The tooth receiving cavity layout of the fourth shell-like body is consistent with the tooth receiving cavity layout of the shell-like body in the last shell-like dental appliance in the series of shell-like dental appliances, which is worn on the same jaw as the fourth shell-like body.

24. The correction system according to claim 22, characterized in that: The lengths of the third positioning portion and the fourth positioning portion along the dental arch curve direction both cover all teeth of the opposing jaw, and the third positioning portion and the fourth positioning portion have occlusal positioning grooves that are arranged in a consistent manner.

25. The correction system according to claim 22, characterized in that: The lengths of the third positioning portion and the fourth positioning portion along the dental arch curve direction both cover all teeth of the opposing jaw, and the tooth layout corresponding to the tooth receiving cavity of the fourth shell-shaped body is consistent with the tooth layout corresponding to the occlusal positioning groove of the third positioning portion.

26. An electronic device, characterized in that: include: at least one processor; as well as, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute a method for generating a preoperative orthodontic target model as described in any one of claims 1 to 7, or execute a method for generating a correction system as described in any one of claims 8 to 18.

27. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, it implements a method for generating a preoperative orthodontic target model as described in any one of claims 1 to 7, or executes a method for generating a correction system as described in any one of claims 8 to 18.

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