Back tooth arrangement method and device based on measurement of alveolar ridge intercrest line angle and medium

Abstract

The invention discloses a posterior tooth arrangement method and device based on measurement of an alveolar ridge intercrest line angle and a medium. The method comprises the following steps: acquiring an occlusion record of a patient; according to the occlusion record of the patient, establishing an upper and lower jaw edentulous jaw three-dimensional model of the patient; determining an occlusal plane of the three-dimensional model, and performing preliminary tooth arrangement on the three-dimensional model according to the occlusal plane; carrying out alveolar ridge intercrest line angle measurement on the three-dimensional model after preliminary tooth arrangement; and modifying the three-dimensional model after preliminary tooth arrangement based on an alveolar ridge intercrest line angle measurement result to obtain a posterior tooth arrangement scheme. According to the method, the included angle between the connecting line of the upper and lower jaw alveolar ridges and the occlusal plane is used as a basis for judging the arrangement mode of the back teeth, three-dimensional reconstruction is carried out on the oral cavity of the patient, digital measurement of the alveolar ridge intercrest line angle of the patient is completed in a computer, and the generated arrangement scheme of the back teeth can recover the relation between the upper and lower jaws of the patient more reasonably; the retention, the stability and the chewing performance of false tooth wearing are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oral prosthetics, and in particular to a posterior tooth arrangement method based on measurement of intercrestal line angle, a device and a medium. BACKGROUND

[0002] Currently, the arrangement of posterior teeth of a complete denture for edentulous jaws mainly depends on the clinical experience of doctors or technicians, for example, the inclination of the cusps and the width of the buccal and lingual diameter of the posterior teeth need to be selected according to the width and height of the alveolar ridge. This process is highly personalized and subjective. In addition, traditional tooth arrangement also needs to consider multiple principles such as aesthetics, tissue health and mastication function. The specific application of these principles largely depends on the experience accumulation of the operator, so the repeatability is poor and the rework rate is high.

[0003] In addition, although the existing digital complete denture software can assist in virtual tooth arrangement and improve the efficiency of some links, its design logic still does not break through the traditional experience framework in essence. When performing virtual tooth arrangement and occlusion design, the algorithm basis of these software still follows the above-mentioned experience-based principles that need to be judged manually, rather than being based on a set of objective and unified data standards.

[0004] Therefore, although digital technology brings formal innovation, since it fails to provide a set of quantifiable and repeatable precise occlusion analysis method, the software operation still heavily relies on the experience of the user to interpret and adjust the virtual results. This makes it difficult to objectively summarize and standardize the core rules of tooth arrangement, making it difficult for young doctors to learn and master the complete denture tooth arrangement technology. SUMMARY

[0005] Therefore, the present application provides a posterior tooth arrangement method based on measurement of intercrestal line angle, a device and a medium.

[0006] The first aspect of the present application provides a posterior tooth arrangement method based on measurement of intercrestal line angle, comprising the following steps:

[0007] Obtaining the occlusion record of the patient; Establishing a three-dimensional model of the upper and lower jaws of the patient according to the occlusion record of the patient; Determining the occlusion plane of the three-dimensional model, and performing preliminary tooth arrangement on the three-dimensional model according to the occlusion plane; Measuring the intercrestal line angle of the three-dimensional model after preliminary tooth arrangement; Modifying the three-dimensional model after preliminary tooth arrangement based on the measurement results of the intercrestal line angle to obtain a posterior tooth arrangement scheme.

[0008] Further, the obtaining of the occlusion record of the patient specifically comprises the following steps: A prefabricated tray is placed inside the patient's mouth to prepare a preliminary impression, which is used to obtain the initial morphology of the patient's alveolar ridge and surrounding tissues. The initial impression is prepared into a personalized tray, which is then worn in the patient's mouth to prepare the final impression. The final impression is used to obtain detailed data on the patient's alveolar ridge and surrounding tissues. A dental occlusal bracket is worn inside the patient's mouth, and the jaw position relationship of the patient's oral cavity is recorded through the dental occlusal bracket; The patient's detailed data on the alveolar ridge and surrounding tissues, as well as the jaw position relationship, are compiled into the patient's occlusal record.

[0009] Furthermore, based on the patient's occlusal record, a three-dimensional model of the patient's upper and lower edentulous jaws is established, specifically including the following steps: The patient's occlusal record was digitally scanned to obtain the patient's oral cavity point cloud data; Based on the patient's oral cavity point cloud data, three-dimensional reconstructions of the patient's maxilla and mandible were performed to obtain three-dimensional models of the patient's edentulous maxilla and mandible.

[0010] Further, determining the occlusal plane of the three-dimensional model specifically includes the following steps: The three-dimensional model is scanned to identify key regions in the model; the key regions include the bilateral zygomatic alveolar ridge regions and the alveolar ridge crest regions in the anterior teeth region; In each key area, reference points are determined based on average location data, resulting in more than three reference point data points. Based on the obtained reference point data, the best-fitting plane is generated as the biting plane of the three-dimensional model.

[0011] Furthermore, determining the occlusal plane of the three-dimensional model further includes the following steps: The motion data of the three-dimensional model is simulated in three-dimensional software; the motion data includes forward and lateral motion data. Based on the motion data of the three-dimensional model, the inclination and height of the occlusal plane are corrected so that the occlusal plane adapts to the patient's oral movements.

[0012] Furthermore, the preliminary tooth alignment of the three-dimensional model based on the occlusal plane specifically includes the following steps: A three-dimensional reference coordinate system is established based on the occlusal plane; the three-dimensional reference coordinate system uses the occlusal plane as the xy plane and the normal direction of the occlusal plane as the z direction; The target points in the three-dimensional model are marked using the three-dimensional reference coordinate system; the target points specifically include the alveolar ridge apex of the first molar region on the left side of the maxilla, the alveolar ridge apex of the first molar region on the right side of the maxilla, the alveolar ridge apex of the first molar region on the left side of the mandible, and the alveolar ridge apex of the first molar region on the right side of the mandible. A virtual first molar is set according to the target point, and other teeth are arranged in sequence next to the first molar until all teeth in the three-dimensional model are arranged, thus obtaining the three-dimensional model after the initial tooth arrangement.

[0013] Furthermore, the measurement of the inter-crest angle of the alveolar ridge in the three-dimensional model after preliminary tooth arrangement specifically includes the following steps: Connect the left vertices of the maxilla and mandible in the three-dimensional model after the initial tooth arrangement to form a line connecting the left alveolar ridge crest in three-dimensional space, which serves as the first connecting line; Connect the right maxillary vertex and the right mandibular vertex of the three-dimensional model after the initial tooth arrangement to form a line connecting the right alveolar ridge crest in three-dimensional space, which serves as the second line. Calculate the first and second included angles formed by the first and second connecting lines and the occlusal plane, and use them as the measurement results of the interalveolar ridge angle of the three-dimensional model.

[0014] Furthermore, modifying the three-dimensional model after the initial tooth arrangement based on the measurement results of the inter-alveolar ridge angle specifically includes the following steps: Based on the measurement results of the interalveolar ridge angle, the occlusal type of the patient's oral cavity is determined; Based on the patient's occlusal type, a corresponding tooth arrangement plan is selected to modify the three-dimensional model after the initial tooth arrangement, resulting in a posterior tooth arrangement plan.

[0015] A second aspect of the present invention discloses an electronic device, including a processor and a memory; The memory is used to store programs; The processor executes the program to implement the above-described method for posterior tooth alignment based on measuring the interalveolar ridge angle.

[0016] A third aspect of the present invention discloses a computer-readable storage medium storing a program that is executed by a processor to implement the above-described method for posterior tooth alignment based on measuring the interalveolar ridge angle.

[0017] This invention also discloses a computer program product or computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device can read the computer instructions from the computer-readable storage medium and execute the computer instructions, causing the computer device to perform the aforementioned method.

[0018] The embodiments of the present invention have the following beneficial effects: The present invention provides a method, device, and medium for posterior tooth arrangement based on measuring the inter-alveolar ridge angle. This method utilizes the angle between the line connecting the upper and lower alveolar ridges and the occlusal plane as the basis for determining the posterior tooth arrangement. Through three-dimensional reconstruction of the patient's oral cavity, the inter-alveolar ridge angle is digitally measured in a computer. The present invention guides tooth arrangement work using the inter-alveolar ridge angle, and the generated posterior tooth arrangement scheme can more rationally restore the patient's upper and lower jaw relationship, improve the retention, stability, and chewing performance of dentures, thereby reducing occlusal adjustments during the trial period, lowering the rework rate, reducing the frequency of follow-up visits, and improving clinical efficiency. The present invention can effectively reduce reliance on the subjective experience of doctors or technicians, and improve the consistency, stability, and repeatability of tooth arrangement.

[0019] Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description or may be learned by practice of the invention. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a flowchart illustrating the implementation steps of a posterior tooth alignment method based on measuring the inter-alveolar ridge angle according to the present invention. Figure 2 This is a schematic diagram illustrating the effect of marking reference points in the established 3D model using the present invention; Figure 3 This is a schematic diagram illustrating the effect of the present invention in determining the occlusal plane of a three-dimensional model; Figure 4 This is a schematic diagram illustrating the effect of the present invention in measuring the inter-crest line angle of the alveolar ridge; Figure 5 This is a schematic diagram of the structure of an electronic device according to the present invention; Figure 6 This is a schematic diagram of a computer-readable storage medium structure according to the present invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0023] The intercrestal line angle (ICLA) relates to the alignment of the alveolar bone and the occlusal plane. In normal occlusion, this angle is formed by the physiological inclination of the maxillary and mandibular alveolar ridges. Therefore, the ICLA reflects the natural compensatory morphology of the alveolar ridges, ensuring functional occlusal balance. For example, when the ICLA is significantly less than 80°, it indicates that the mandibular alveolar ridge resorption has led to a significant widening of the mandibular dental arch relative to the maxillary dental arch, resulting in a severe disharmony in the width relationship between the maxillary and mandibular arches. In this case, if the posterior teeth are still aligned according to the normal cusp-fossa relationship (neutral occlusal relationship), it cannot be guaranteed that the main functional cusps, such as the lingual cusp of the maxillary posterior teeth or the buccal cusp of the mandibular posterior teeth, are directly above their respective alveolar ridge crests. This violates the core principle of transmitting occlusal forces along the alveolar ridge crest direction to protect tissue health. Therefore, the posterior teeth must be aligned in a reverse occlusal relationship, meaning that the buccal cusps of the maxillary posterior teeth establish occlusal contact with the lingual cusps of the mandibular posterior teeth. This cross-occlusal arrangement allows the functional cusps to return to their alveolar ridge positions, thus ensuring the stability of the denture. It is evident that the ICLA (Integrated Cavity Association) can serve as a basis for determining the posterior tooth alignment in denture restorations.

[0024] Therefore, such as Figure 1 As shown, the first embodiment of the present invention discloses a method for posterior tooth alignment based on measuring the inter-alveolar ridge angle, comprising the following steps: S1. Obtain the patient's occlusion record; S2. Based on the patient's occlusal records, establish a three-dimensional model of the patient's upper and lower edentulous jaws; S3. Determine the occlusal plane of the 3D model, and perform preliminary tooth arrangement on the 3D model based on the occlusal plane; S4. Measure the inter-crest angle of the alveolar ridge in the three-dimensional model after preliminary tooth arrangement; S5. Based on the measurement results of the inter-alveolar ridge angle, modify the three-dimensional model after the initial tooth arrangement to obtain the posterior tooth arrangement scheme.

[0025] This invention provides a precise digital measurement method for ICLA, which can scientifically guide the alignment of posterior teeth based on measurement results, realize the quantification, standardization and repeatability of tooth arrangement in edentulous jaws, reduce trial fitting and adjustment, and improve the efficiency and success rate of complete denture restoration.

[0026] The implementation process of each step of this invention is described in detail below: S1. Obtain the patient's bite record.

[0027] In step S1, the patient's occlusion record is obtained, which specifically includes the following steps: S1-1. Place a prefabricated tray inside the patient's mouth to prepare a preliminary impression, and obtain the initial morphology of the patient's alveolar ridge and surrounding tissues through the preliminary impression.

[0028] In this embodiment of the invention, obtaining the patient's occlusal record is performed manually by a doctor or technician. First, a prefabricated edentulous tray is used to hold impression paste or alginate, etc., and is rotated and placed in the patient's mouth. Through myofunctional manipulation (such as lip-sucking and tongue-thrusting), the preliminary morphology of the alveolar ridge and surrounding tissues is obtained, i.e., the initial impression is prepared. The initial impression records the contour, height, and position of structures such as the frenulum of the alveolar ridge, providing a parameter basis for the fabrication of a personalized tray.

[0029] S1-2. Prepare a personalized tray from the initial impression, wear the personalized tray in the patient's mouth, prepare the final impression, and obtain detailed data on the patient's alveolar ridge and surrounding tissues through the final impression.

[0030] A personalized tray is a tray custom-made based on the patient's oral cavity morphology, using the initial impression model. The dentist evenly applies the prepared final impression material (such as high-flow silicone rubber) onto the personalized tray, which has already undergone edge shaping, then rotates it into the patient's mouth, gently presses it into place, and performs myofunctional shaping again. After the material hardens, it is removed, thus obtaining the most accurate final impression, which records detailed data on the patient's alveolar ridge and surrounding tissues.

[0031] S1-3. Place an occlusal bracket in the patient's mouth and record the jaw position relationship of the patient's oral cavity through the occlusal bracket; A dental occlusion frame is a measuring tool used to determine jaw position relationships. It consists of a base and a wax rim. The dental occlusion frame records the appropriate height (vertical distance) of the lower third of the patient's face and the physiological posterior position of the mandibular condyle in the articular fossa (horizontal relationship). Under the guidance of a dentist, the patient needs to perform biting and swallowing movements to bring the upper and lower jaws together in the correct position, thereby recording crucial jaw position data.

[0032] S1-4. Compile detailed data on the patient's alveolar ridge and surrounding tissues, as well as jaw position relationships, into the patient's occlusal record.

[0033] Finally, the doctor or technician will compile the patient's oral data obtained using the final impression and occlusal tray into the patient's occlusal record.

[0034] S2. Based on the patient's occlusal records, establish a three-dimensional model of the patient's upper and lower edentulous jaws.

[0035] In step S2, based on the patient's occlusal record, a three-dimensional model of the patient's maxillary and mandibular edentulous jaws is established, specifically including the following steps: S2-1. Digitally scan the patient's occlusal record to obtain the patient's oral cavity point cloud data; S2-2. Based on the patient's oral cavity point cloud data, perform three-dimensional reconstruction of the patient's maxilla and mandible to obtain a three-dimensional model of the patient's edentulous maxilla and mandible.

[0036] In this embodiment of the invention, after obtaining the patient's occlusal record, a digital scanning instrument is used to acquire the occlusal state of the patient's maxillary and mandibular impressions fixed in the occlusal record, thereby obtaining the original point cloud or triangular mesh data of the spatial relationship within the patient's oral cavity. Then, digital processing software is used to fuse the acquired point cloud data, generating three-dimensional surface models of the patient's maxilla and mandible, as well as model files of the maxilla and mandible in the occlusal state. Finally, the three-dimensional surface models of the patient's maxilla and mandible are aligned using the model files in the occlusal state, ensuring that the three-dimensional surface models of the maxilla and mandible fit precisely at the fixed positions in the occlusal record, resulting in a three-dimensional model with accurate spatial relationships, serving as the three-dimensional model of the patient's edentulous maxilla and mandible.

[0037] S3. Determine the occlusal plane of the 3D model and perform preliminary tooth arrangement on the 3D model based on the occlusal plane.

[0038] In step S3, the occlusal plane of the 3D model is determined, which specifically includes the following steps: S3-1. Scan the 3D model and identify key regions in the 3D model; key regions include the bilateral zygomatic alveolar ridge region and the alveolar ridge crest region in the anterior teeth region.

[0039] like Figure 3 As shown, in this embodiment of the invention, the maxillary and mandibular models were scanned to identify the bilateral zygomatic alveolar ridge region and the alveolar ridge crest region in the anterior teeth. The zygomatic alveolar ridge region is the bony ridge extending downward from the zygomatic process of the maxilla, located on the buccal side of the root apex of the maxillary first molar. Because its morphology remains relatively stable over a long period, and it is also the area in the oral cavity that bears the main masticatory forces, the zygomatic alveolar ridge region serves as a natural benchmark for assessing and establishing facial symmetry and dental arch symmetry. The alveolar ridge crest region in the anterior teeth has a constant positional relationship with the lingual cervical margin of the maxillary central incisor. The vertical height of the anterior teeth directly determines the occlusal vertical distance and labial support of the denture, thus affecting facial contour and aesthetics. Therefore, these two regions are the most stable bony landmarks in the patient's oral cavity and are closely related to the function of the final prosthesis.

[0040] S3-2. In each key area, determine reference points based on average location data to obtain more than three reference point data; Reference Figure 2 In this embodiment of the invention, reference points are collected in the bilateral zygomatic alveolar ridge region and the alveolar ridge crest region of the anterior teeth. The collected reference points are obtained based on the average position data of each region.

[0041] S3-3. Based on the obtained reference point data, generate the best fitting plane as the biting plane of the three-dimensional model.

[0042] In this embodiment of the invention, the line connecting the two zygomatic alveolar ridges ensures that the plane does not tilt laterally and is roughly parallel to horizontal facial reference lines such as the line connecting the pupils, thus guaranteeing the symmetry of the restoration. Based on this, the line connecting the two zygomatic alveolar ridges is extended into a plane using reference points in the alveolar ridge crest region of the anterior teeth; this is the patient's occlusal plane. An example of an occlusal plane is shown below. Figure 3 As shown.

[0043] Because the natural occlusal plane of a dental arch is not perfectly straight, but has a slight curve, in order to improve the accuracy of the occlusal plane, in some embodiments, determining the occlusal plane of the three-dimensional model further includes the following steps: S3-4. Simulate the motion data of the 3D model in 3D software; the motion data includes forward and lateral motion data.

[0044] S3-5. Based on the motion data of the three-dimensional model, correct the inclination and height of the occlusal plane so that the occlusal plane adapts to the patient's oral movements.

[0045] In this embodiment of the invention, three-dimensional software is used to simulate the protrusion and lateral movements of the mandible in an initial plane. The three-dimensional software calculates whether there are abnormal virtual condylar guide angles, protrusion, or lateral occlusal interferences caused by the plane being too high, too low, or tilted during the movement. The three-dimensional software automatically and iteratively fine-tunes the tilt (protrusion / retrograde tilt, lateral tilt) and height of the initial plane so that within the range of mandibular functional movement, the virtual cusps can glide along a reasonable path, minimizing interference and thus obtaining a more accurate occlusal plane.

[0046] In step S3, preliminary tooth alignment is performed on the 3D model based on the occlusal plane, specifically including the following steps: S3-6. Establish a three-dimensional reference coordinate system based on the occlusal plane; the three-dimensional reference coordinate system uses the occlusal plane as the xy plane and the normal direction of the occlusal plane as the z direction; S3-7. Mark the target points in the three-dimensional model using the three-dimensional reference coordinate system; the target points specifically include the alveolar ridge apex of the first molar region on the left side of the maxilla, the alveolar ridge apex of the first molar region on the right side of the maxilla, the alveolar ridge apex of the first molar region on the left side of the mandible, and the alveolar ridge apex of the first molar region on the right side of the mandible. S3-8. Set a virtual first molar based on the target point, and arrange the other teeth next to the first molar in sequence until all teeth in the 3D model are arranged to obtain the 3D model after the initial tooth arrangement.

[0047] In this embodiment of the invention, a right-handed three-dimensional rectangular coordinate system is first established using the occlusal plane as the reference plane and its normal direction as the three-dimensional reference coordinate system. The coordinate positions of each point in the three-dimensional model are determined through the three-dimensional reference coordinate system. Then, the alveolar ridge apexes of the left maxillary first molar region, the right maxillary first molar region, the left mandibular first molar region, and the right mandibular first molar region are used as anatomical landmarks for tooth arrangement. The virtual first molar and subsequent adjacent molars are initially placed near the alveolar ridge crests of the upper and lower jaws according to general tooth arrangement principles, resulting in a three-dimensional model after preliminary tooth arrangement.

[0048] S4. Measure the inter-crest angle of the alveolar ridge in the three-dimensional model after preliminary tooth arrangement; In step S4, the inter-crest angle of the alveolar ridge is measured on the three-dimensional model after the initial tooth arrangement. This specifically includes the following steps: S4-1. Connect the left vertex of the maxilla and the left vertex of the mandible in the three-dimensional model after the initial tooth arrangement to form the left alveolar ridge crest line in three-dimensional space, which serves as the first connecting line; S4-2. Connect the right maxillary vertex and the right mandibular vertex of the three-dimensional model after the initial tooth arrangement to form the right alveolar ridge crest line in three-dimensional space, which serves as the second connecting line; S4-3. Calculate the first and second included angles formed by the first and second connecting lines and the occlusal plane, and use them as the measurement results of the interalveolar ridge angle of the three-dimensional model.

[0049] Reference Figure 4 In this embodiment of the invention, by connecting the left maxillary vertex and the left mandibular vertex and the right maxillary vertex and the right mandibular vertex of the three-dimensional model after preliminary tooth arrangement, the left alveolar ridge apex line and the right alveolar ridge apex line are established respectively. The angle between these two connecting lines and the set occlusal plane is calculated to obtain the left alveolar ridge apex line angle (Left ICLA) and the right alveolar ridge apex line angle (Right ICLA).

[0050] S5. Based on the measurement results of the inter-alveolar ridge angle, modify the three-dimensional model after the initial tooth arrangement to obtain the posterior tooth arrangement scheme.

[0051] In step S5, the three-dimensional model after the initial tooth arrangement is modified based on the measurement results of the inter-alveolar ridge angle. This specifically includes the following steps: S5-1. Determine the occlusal type of the patient's oral cavity based on the measurement results of the inter-alveolar ridge angle; S5-2. Based on the patient's oral occlusion type, select the corresponding tooth arrangement plan and modify the three-dimensional model after the initial tooth arrangement to obtain the posterior tooth arrangement plan.

[0052] After obtaining the interalveolar ridge angle (ICLA), this embodiment of the invention adjusts the tooth arrangement plan according to preset quantitative indicators. For example, if ICLA > 80°, it is determined that the posterior tooth region on that side is suitable for normal occlusion (i.e., maxillary posterior teeth covering mandibular posterior teeth); if ICLA < 80°, it is determined that the posterior tooth region on that side is suitable for reverse occlusion (i.e., mandibular posterior teeth covering maxillary posterior teeth, or cusp-to-cusp occlusion). By comprehensively considering the judgment results of both sides, a final overall arrangement decision is formed. For example, for the side where ICLA is slightly less than the 80° threshold, a plan that moderately reduces normal overbite (degree of cusp interlocking) is used instead of the reverse occlusion plan, forming a complete, feasible final arrangement strategy that provides stable occlusion and function for the patient, which is used as the posterior tooth arrangement plan.

[0053] Compared to traditional methods, the measurement in this invention offers advantages such as precision, automation, and repeatability. Through digital geometric measurement, the ICLA (Intracytoplasmic Lesion Clamping), which was traditionally difficult to measure, becomes a precisely quantifiable indicator. Digital angle measurement eliminates reliance on the subjective experience of dentists or technicians for tooth arrangement, thereby improving consistency, stability, and repeatability. ICLA-based matching tooth arrangement more effectively restores the maxillary-mandibular relationship, improving denture retention, stability, and chewing performance. Because tooth arrangement is more accurate, occlusal adjustments during the trial fitting process are significantly reduced, thus lowering rework rates, reducing follow-up visits, and improving clinical efficiency.

[0054] In addition to complete dentures, this invention is also applicable to restorative methods such as overdentures and removable partial dentures. It can be widely used in other restorative treatments involving the assessment of the relationship between the upper and lower jaws, and has significant versatility and prospects for promotion.

[0055] Figure 5 This is a schematic diagram of the electronic device proposed in the second embodiment of the present invention. In this embodiment, the memory stores program instructions for implementing the posterior tooth alignment method based on measuring the inter-alveolar ridge angle of any of the above embodiments. The processor executes the program instructions stored in the memory to perform posterior tooth alignment based on measuring the inter-alveolar ridge angle. The processor may also be referred to as a CPU (Central Processing Unit). The processor may be an integrated circuit chip with signal processing capabilities. The processor may also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0056] The methods described in the first embodiment of the present invention are applicable to the embodiments of the present electronic device. The specific functions implemented by the embodiments of the present electronic device are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above methods.

[0057] Figure 6 This is a schematic diagram of the structure of a computer-readable storage medium according to the third embodiment of the present invention. The computer-readable storage medium of the fourth embodiment of the present invention stores program instructions capable of implementing the above-described method for posterior tooth alignment based on measuring the inter-alveolar ridge angle. These program instructions can be stored in the storage medium in the form of a software product, including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute all or part of the steps of the methods of various embodiments of the present invention. The aforementioned computer-readable storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks, or terminal devices such as computers, servers, mobile phones, and tablets.

[0058] The methods described in the first embodiment of the present invention are applicable to the computer-readable storage medium embodiment. The specific functions implemented by the computer-readable storage medium embodiment are the same as those in the above method embodiment, and the beneficial effects achieved are also the same as those achieved by the above method.

[0059] This embodiment also provides a computer program product that, when run on a computer, causes the computer to perform the aforementioned related steps to implement the posterior tooth alignment method based on measuring the interalveolar ridge angle provided in the above embodiment.

[0060] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in the embodiments of the present invention are all information and data authorized by the user or fully authorized by all parties. Furthermore, the collection, use and processing of related data must comply with the relevant laws, regulations and standards of the relevant countries and regions, and corresponding operation entry points are provided for users to choose to authorize or refuse.

[0061] Those skilled in the art will understand that modules in the device of the embodiments of the present invention can be adaptively modified and placed in one or more devices different from those embodiments. Modules, units, or components in the embodiments of the present invention can be combined into a single module, unit, or component, and further, they can be divided into multiple sub-modules, sub-units, or sub-components. Except where at least some of such features and / or processes or units are mutually exclusive, any combination can be used to combine all features disclosed in this specification (including the corresponding claims, abstract, and drawings) and all processes or units of any method or device so disclosed. Unless expressly stated otherwise, each feature disclosed in this specification (including the corresponding claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0062] Through the above description of the embodiments, those skilled in the art will understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0063] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0064] Furthermore, the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to mutually. In particular, for embodiments such as apparatus and devices, since they are basically similar to the method embodiments, the relevant parts can be referred to the description of the method embodiments. The apparatus, devices, and other embodiments described above are merely illustrative, and the modules, units, etc., described as separate components may or may not be physically separate, that is, they may be located in one place or distributed in multiple places, such as nodes in a system network. Specifically, some or all of the modules and units can be selected according to actual needs to achieve the purpose of the above-described embodiment solutions. Those skilled in the art can understand and implement this without creative effort.

[0065] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0066] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0067] Furthermore, the terms "first," "second," etc., used in the embodiments of this invention are for descriptive purposes only and should not be construed as indicating or implying relative importance, or implicitly specifying the number of technical features indicated in this embodiment. Therefore, features defined with terms such as "first" and "second" in the embodiments of this invention can explicitly or implicitly indicate that the embodiment includes at least one of those features. In the description of this invention, the word "multiple" means at least two or more, such as two, three, four, etc., unless otherwise explicitly specified in the embodiments.

[0068] In embodiments of the present invention, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, components, features, and elements with the same names in different embodiments of the present invention may have the same meaning or different meanings, the specific meaning of which must be determined by its interpretation in that specific embodiment or further in conjunction with the context of that specific embodiment.

[0069] Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention. Other embodiments of the present invention will readily conceive of by considering the specification and practicing the invention. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

Claims

1. A method for posterior tooth alignment based on measuring the inter-alveolar ridge angle, characterized in that, Includes the following steps: Obtain the patient's bite record; Based on the patient's occlusion record, a three-dimensional model of the patient's maxillary and edentulous jaws was created. Determine the occlusal plane of the three-dimensional model, and perform preliminary tooth alignment based on the occlusal plane; The inter-crest angle of the alveolar ridge was measured on the three-dimensional model after the initial tooth arrangement. Based on the measurement results of the inter-alveolar ridge angle, the three-dimensional model after the initial tooth arrangement is modified to obtain the posterior tooth arrangement scheme.

2. The method for posterior tooth alignment based on measuring the inter-alveolar ridge angle according to claim 1, characterized in that, Obtaining the patient's occlusion record specifically includes the following steps: A prefabricated tray is placed inside the patient's mouth to prepare a preliminary impression, which is used to obtain the initial morphology of the patient's alveolar ridge and surrounding tissues. The initial impression is prepared into a personalized tray, which is then worn in the patient's mouth to prepare the final impression. The final impression is used to obtain detailed data on the patient's alveolar ridge and surrounding tissues. A dental occlusal bracket is worn inside the patient's mouth, and the jaw position relationship of the patient's oral cavity is recorded through the dental occlusal bracket; The patient's detailed data on the alveolar ridge and surrounding tissues, as well as the jaw position relationship, are compiled into the patient's occlusal record.

3. The method for posterior tooth alignment based on measuring the interalveolar ridge angle according to claim 1, characterized in that, The process of establishing a three-dimensional model of the patient's edentulous jaw based on the patient's occlusal record includes the following steps: The patient's occlusal record was digitally scanned to obtain the patient's oral cavity point cloud data; Based on the patient's oral cavity point cloud data, three-dimensional reconstructions of the patient's maxilla and mandible were performed to obtain three-dimensional models of the patient's edentulous maxilla and mandible.

4. The method for posterior tooth alignment based on measuring the interalveolar ridge angle according to claim 1, characterized in that, Determining the occlusal plane of the three-dimensional model specifically includes the following steps: The three-dimensional model is scanned to identify key regions in the model; the key regions include the bilateral zygomatic alveolar ridge regions and the alveolar ridge crest regions in the anterior teeth region; In each key area, reference points are determined based on average location data, resulting in more than three reference point data points. Based on the obtained reference point data, the best-fitting plane is generated as the biting plane of the three-dimensional model.

5. The method for posterior tooth alignment based on measuring the interalveolar ridge angle according to claim 4, characterized in that, Determining the occlusal plane of the three-dimensional model further includes the following steps: The motion data of the three-dimensional model is simulated in three-dimensional software; the motion data includes forward and lateral motion data. Based on the motion data of the three-dimensional model, the inclination and height of the occlusal plane are corrected so that the occlusal plane adapts to the patient's oral movements.

6. The method for posterior tooth alignment based on measuring the inter-alveolar ridge angle according to claim 1, characterized in that, The preliminary tooth alignment of the three-dimensional model based on the occlusal plane specifically includes the following steps: A three-dimensional reference coordinate system is established based on the occlusal plane; the three-dimensional reference coordinate system uses the occlusal plane as the xy plane and the normal direction of the occlusal plane as the z direction; The target points in the three-dimensional model are marked using the three-dimensional reference coordinate system; the target points specifically include the alveolar ridge apex of the first molar region on the left side of the maxilla, the alveolar ridge apex of the first molar region on the right side of the maxilla, the alveolar ridge apex of the first molar region on the left side of the mandible, and the alveolar ridge apex of the first molar region on the right side of the mandible. A virtual first molar is set according to the target point, and other teeth are arranged in sequence next to the first molar until all teeth in the three-dimensional model are arranged, thus obtaining the three-dimensional model after the initial tooth arrangement.

7. The method for posterior tooth alignment based on measuring the inter-alveolar ridge angle according to claim 1, characterized in that, The measurement of the inter-crest angle of the three-dimensional model after preliminary tooth arrangement specifically includes the following steps: Connect the left vertices of the maxilla and mandible in the three-dimensional model after the initial tooth arrangement to form a line connecting the left alveolar ridge crest in three-dimensional space, which serves as the first connecting line; Connect the right maxillary vertex and the right mandibular vertex of the three-dimensional model after the initial tooth arrangement to form a line connecting the right alveolar ridge crest in three-dimensional space, which serves as the second line. Calculate the first and second included angles formed by the first and second connecting lines and the occlusal plane, and use them as the measurement results of the interalveolar ridge angle of the three-dimensional model.

8. The method for posterior tooth alignment based on measuring the inter-alveolar ridge angle according to claim 1, characterized in that, The modification of the three-dimensional model after the initial tooth arrangement based on the measurement results of the inter-alveolar ridge angle specifically includes the following steps: Based on the measurement results of the interalveolar ridge angle, the occlusal type of the patient's oral cavity is determined; Based on the patient's occlusal type, a corresponding tooth arrangement plan is selected to modify the three-dimensional model after the initial tooth arrangement, resulting in a posterior tooth arrangement plan.

9. An electronic device, characterized in that, Including the processor and memory; The memory is used to store programs; The processor executes the program to implement a posterior tooth alignment method based on measuring the interalveolar ridge angle as described in any one of claims 1-8.

10. A computer-readable storage medium, characterized in that, The storage medium stores a program that is executed by a processor to implement a posterior tooth alignment method based on measuring the interalveolar ridge angle as described in any one of claims 1-8.

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