Design method of invisible tooth socket combined inlay type jaw pad based on digital analysis

Abstract

The invention discloses a design method of an invisible tooth socket combined inlay type jaw pad based on digital analysis, and relates to the technical field of tooth correction, and the design method comprises the following steps: acquiring three-dimensional space data of a lower jawbone and a skull base of a patient by adopting CT scanning equipment; analyzing the correct position of the mandible relative to the skull base through the acquired three-dimensional structure data; according to the reasonable position of the lower jaw, corresponding occlusion data are pushed out; pushing out an upper jaw plane according to the visual axis plane of the patient; calculating the condylar gradient to obtain an incision guide plane and determining the relative position of upper and lower anterior teeth; designing an occlusion high inlay accessory in combination with an invisible orthodontic appliance scheme; the system has the advantages of high precision, high comfort and good effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dental orthodontic treatment, and particularly relates to a design method of a combined design of an invisible dental aligner and an embedded body type jaw pad based on digital analysis. BACKGROUND

[0002] In the process of orthodontic treatment, achieving precise jaw position control and efficient tooth correction simultaneously is the key to improving treatment effect. However, the existing jaw pad device and invisible aligner technology have obvious limitations. Traditional jaw pads lack digital precise design. The device can achieve the maintenance of the upper and lower jaw positions in the sagittal, horizontal and vertical directions to a certain extent, such as functional orthodontic devices such as Twin-Block, muscle activator, Herbst appliance, functional regulator type II (FR-II), which can stimulate and promote the forward growth of the lower jaw, but cannot be effectively combined with invisible aligner correction technology, and it is difficult to meet the needs of patients for simultaneous jaw position maintenance and tooth movement correction; and the conventional invisible aligner is convenient and comfortable for tooth correction, but lacks reliable jaw position maintenance function, which easily leads to unstable jaw position during treatment, affecting the orthodontic effect and treatment period.

[0003] Inaccurate positioning of the lower jaw: lacking the process of obtaining the data of the lower jaw and the skull base through CT scanning, and precisely determining the correct position of the lower jaw relative to the skull base by software analysis, relying more on the experience of doctors or simple models, resulting in a lack of objective and precise quantitative basis for positioning, which easily leads to deviation of the lower jaw position after correction, affecting the coordination of the dental and jaw relationship.

[0004] Insufficient consideration of muscle position and comfort: the traditional process does not set the key link of “making traditional jaw pads to verify the lower jaw position, muscle position and comfort”, directly designing invisible aligners, and does not fully simulate the adaptability of the lower jaw in the muscle function state, ignoring the dynamic influence of muscles on the position after correction, which easily leads to muscle incoordination or long-term discomfort.

[0005] Lack of precise basis for determining the position of the upper jaw plane: the key parameters such as “the angle of the upper jaw plane relative to the visual axis plane” and “the angle of the incisive guide plane relative to the condylar guide plane” are not systematically measured, and these data are not integrated by software calculation to determine the position of the upper jaw plane, resulting in a lack of precise quantitative analysis and digital support for determining the position of the upper jaw plane, affecting the overall optimization of the spatial position relationship between the upper and lower jaws.

[0006] Lack of a verification system combining digitalization and function: in the existing technology, the data acquisition (such as CT scanning), analysis (software processing), functional verification (jaw pad test) and post-treatment evaluation (postoperative CT verification) are disconnected, and a complete closed loop is not formed. Lack of systematic integration from anatomical data to functional verification and then to therapeutic effect evaluation, it is difficult to guarantee the long-term stability of the lower jaw position, muscle position and comfort after correction.

[0007] And in the existing correction technology, because the jaw position control and tooth correction cannot be carried out at the same time, there are the following problems:

[0008] Functional separation problem: the traditional jaw pad device and the invisible aligner correction technology are independent of each other. The traditional jaw pad can realize the maintenance of the upper and lower jaw positions in the sagittal direction, the horizontal direction and the vertical direction, but cannot be effectively combined with the invisible aligner correction technology. The invisible aligner is convenient for aesthetic and comfortable tooth correction, but lacks reliable jaw position maintenance function, which makes it difficult for patients to simultaneously realize jaw position maintenance and tooth correction during orthodontic treatment, affecting treatment efficiency and effect.

[0009] Jaw position instability problem: during the use of the conventional invisible aligner, due to the lack of a special jaw position maintenance structure, it is difficult to maintain the precise positioning of the upper and lower jaw positions in multiple dimensions, which can easily lead to jaw position deviation during treatment. This instability not only prolongs the orthodontic treatment period, but also can cause occlusal disorder, temporomandibular joint discomfort and other complications, increasing the risk of treatment and patient pain.

[0010] Poor treatment synergy: the existing oral orthodontic means cannot realize the synergy of jaw position maintenance and tooth movement correction. The separation of the functions of the two technologies makes it necessary for doctors to weigh the pros and cons when formulating treatment plans, which cannot fully utilize the advantages of the two technologies and cannot meet the patient's expectations for efficient and precise orthodontic treatment. SUMMARY

[0011] The technical problem to be solved by the present application is to provide a design method of invisible aligner combined with inlay type jaw pad based on digital analysis, which solves the various problems existing in the separate correction of the existing jaw pad device and invisible aligner technology.

[0012] TECHNICAL SOLUTION

[0013] To solve the above problems, the technical scheme provided by the present application is:

[0014] A design method of invisible aligner combined with inlay type jaw pad based on digital analysis, comprising

[0015] Obtaining three-dimensional spatial data of the patient's mandible and skull base by using a CT scanning device;

[0016] Analyzing the correct position of the mandible relative to the skull base from the obtained three-dimensional structure data;

[0017] According to the reasonable mandibular position, the corresponding occlusal data is obtained;

[0018] According to the patient's visual axis plane, the maxillary plane is obtained;

[0019] Calculate the condyle guide slope to obtain the incisive guide plane and determine the relative position of the upper and lower anterior teeth;

[0020] Designing bite high inlay accessories in conjunction with invisible aligner scheme;

[0021] The design of the bite high inlay accessories of the upper and lower jaws of the invisible aligner scheme is as follows:

[0022] Anterior tooth device: simulate the mentality on the upper tooth of the lower anterior tooth belt, reverse the lower jaw shape to the upper jaw, and make a model according to the upper jaw shape and press the invisible aligner.

[0023] Posterior tooth device: place the occlusal surfaces of the upper and lower jaws in correct occlusal surface planes, and transfer the shape to the tooth model to make the invisible aligner.

[0024] Further, it also includes treatment evaluation feedback, which verifies the position of the patient's lower jaw, the occlusion relationship of the dentition, the coordination of the muscle site, and the comfort of the patient by taking CT again.

[0025] Further, it also includes a repair auxiliary tool after treatment, which analyzes whether there is a tight occlusion situation in the lower jaw of the patient in this jaw position, evaluates the influence on the patient's mastication and treatment stability, and uses a three-dimensional model to design the shape of the tooth and jaw surface and tooth tip, to make a repair guide plate and a model tool.

[0026] Further, the CT scan is a large field of view oral and maxillofacial cone beam CT, and the scanning range covers the patient's full jaw and face.

[0027] Further, to analyze the correct position of the mandible relative to the skull base, the sagittal plane of the three-dimensional model of the full jaw surface is used as the sagittal plane, the condyle is positioned by the most convex point on the surface of the condyle in the vertical, sagittal and horizontal three-dimensional directions, and the distance of the condyle relative to the glenoid fossa in the three-dimensional plane is measured according to the positioned condyle. By determining the position of the condyle and its distance relative to the glenoid fossa, the position of the mandible is determined. Then, according to the reasonable position of the condyle in the glenoid fossa, the mandible is moved in three dimensions and the position of the mandible is confirmed.

[0028] Further, to obtain occlusion data, a 3D oral scanning instrument is used to obtain a corresponding patient's mouth model, and the mouth scanning dentition model and the dentition in the CT are overlapped in the model software through three-dimensional overlapping. The new occlusion position is obtained by repositioning the lower jaw position according to the reasonable position of the condyle and the mouth scanning model, and the occlusion position data of the mouth scanning model is obtained. The occlusion position is output as the mouth scanning data of the occlusion of the repositioned lower jaw.

[0029] Further, to obtain the upper jaw plane, first obtain the visual axis plane through the three-dimensional model of the patient, and then obtain the upper jaw plane according to the relationship between the visual axis plane and the upper jaw plane.

[0030] Further, to obtain the incisive guide plane, the mandibular position and the maxillary plane form an electronic jaw frame, the mouth scan model is placed on the electronic jaw frame, the spatial position relationship of the maxilla and the temporomandibular joint is captured in real time, the three-dimensional trajectory of the condyle during mandibular movement is recorded, the angle between the condyle movement trajectory in the joint cavity and the horizontal plane is calculated and output, the condyle guide slope is obtained, and the inclination angle of the incisive guide disc is obtained through the condyle guide slope, so as to determine the incisive guide plane.

[0031] Further, the incisive guide plane is combined with the occlusion data on the three-dimensional model to position the relative positions of the upper and lower anterior teeth.

[0032] Further, it also includes making a jaw pad verification target position to match the muscle function and joint comfort, making an anatomical jaw pad on the determined repositioned position of the mandible, and discovering problems in advance through the wearing of the patient.

[0033] Beneficial effects

[0034] Compared with the prior art, the technical scheme provided by the present application has the following beneficial effects:

[0035] In the precise positioning of the mandibular position: the present application obtains the data of the mandible and the skull base through CT scanning, and determines the correct position of the mandible relative to the skull base by software analysis, which is more objective and accurate than the traditional method.

[0036] Integrate muscle position and comfort verification: make a traditional jaw pad before treatment to verify the mandibular position, muscle position and comfort, avoid muscle incoordination or discomfort after treatment, and make up for the deficiency of existing invisible treatment in muscle function consideration.

[0037] Optimize the design of the treatment scheme: based on the precise mandibular position and angle measurement (such as the visual axis plane and the incisive guide plane angle), calculate the position of the maxillary plane, guide the design of the occlusal high inlay attachment of the invisible aligner, make the treatment force more meet the physiological demand, and improve the curative effect and comfort.

[0038] The technology precisely determines the mandibular position and related plane angle through CT scanning and software analysis, verifies the mandibular position, muscle position and comfort by means of traditional jaw pad, and forms a closed-loop process of "data acquisition - analysis and design - function verification - treatment - postoperative review". Its effect is reflected in:

[0039] Positioning accuracy: CT scanning combined with software analysis is more objective and quantitative than traditional experience judgment, which improves the accuracy of determining the position of the mandible and the maxillary plane.

[0040] Functional coordination: the jaw pad verification link can discover the mismatch between the mandibular position and the muscle position in advance, avoid muscle function disorder after treatment, and ensure comfort.

[0041] Quality controllability: before and after the treatment, CT verification is carried out to ensure the long-term stability of the treatment effect and reduce the risk of recurrence. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 The flowchart of embodiment 1 of the application is shown in the figure;

[0043] Figure 2 The schematic diagram of the last point of the condyle in the sagittal plane in embodiment 1 of the application is shown in the figure;

[0044] Figure 3 The schematic diagram of the uppermost point of the condyle in the vertical direction in embodiment 1 of the application is shown in the figure;

[0045] Figure 4 The schematic diagram of the innermost point of the condyle in the horizontal direction in embodiment 1 of the application is shown in the figure;

[0046] Figure 5 The schematic diagram of the distance of the condyle position relative to the glenoid cavity in embodiment 1 of the application is shown in the figure;

[0047] Figure 6 The schematic diagram of the anatomical jaw pad made on the repositioned position of the mandible in embodiment 1 of the application is shown in the figure;

[0048] Figure 7 The schematic diagram of the design flow of the anterior tooth device in embodiment 1 of the application is shown in the figure;

[0049] Figure 8 The schematic diagram of the design flow of the posterior tooth device in embodiment 1 of the application is shown in the figure. DETAILED DESCRIPTION

[0050] To make the technical solution of the application clearer, the application is further described in detail below in combination with the drawings and specific embodiments.

[0051] Embodiment 1

[0052] In combination with the drawings, Figures 1-8 A design method of a digital analysis-based invisible mouthpiece combined with an onlay jaw pad, comprising:

[0053] The CT scanning device is used to obtain the three-dimensional spatial data of the patient's mandible and skull base.

[0054] When the CT scanning device is used to scan the patient, the CT device performing the scanning work is preferably a CBCT device with a large field of view. CBCT, i.e., cone beam CT of the oral and maxillofacial region, is a medical imaging device that generates three-dimensional images using cone beam X-ray scanning technology combined with computer reconstruction algorithms. It has the advantages of low radiation dose (50%-90% lower than traditional CT), short scanning time, and high spatial resolution, and can provide high-precision three-dimensional structure data of the patient's full maxillofacial region.

[0055] The CBCT with large field of view covers the whole maxillofacial structure of the patient during scanning, scans the upper and lower jaw bones, temporomandibular joint, airway, skull base and other structures, obtains the whole maxillofacial structure data of the patient after scanning, and marks the three-dimensional spatial data of the lower jaw and skull base.

[0056] Through the obtained high-precision three-dimensional spatial data of the whole maxillofacial structure, the position of the condyle relative to the skull base and the abnormality of the jaw bone in structure are conveniently analyzed. Accurate three-dimensional structure data is provided for subsequent design of the target position of the lower jaw of the patient. The whole maxillofacial structure data of the patient will construct a three-dimensional model of the whole maxillofacial structure of the patient in the corresponding imaging software. Through the three-dimensional model constructed in the software, further analysis is carried out through the three-dimensional model of the maxillofacial structure of the patient.

[0057] Through the obtained three-dimensional structure data, the correct position of the lower jaw relative to the skull base is analyzed.

[0058] Further analysis is carried out through the obtained three-dimensional model of the whole maxillofacial structure. The sagittal plane of the three-dimensional model of the whole maxillofacial structure is taken as the sagittal plane, and the sagittal plane is positioned on the condyle through the most convex point of the condyle surface in the vertical, sagittal and horizontal three-dimensional directions, such as Figure 2 the last point of the condyle on the sagittal plane is determined, Figure 3 the uppermost point of the condyle in the vertical direction is determined, Figure 4 the innermost point of the condyle in the horizontal direction is determined, and the distance of the condyle relative to the fossa in the three-dimensional plane is measured according to the positioned condyle, such as Figure 5 Through the determined position of the condyle and the distance of the condyle relative to the fossa, the position of the lower jaw is deduced. According to the reasonable position of the condyle in the fossa, the lower jaw is moved in three dimensions, and the position of the lower jaw is confirmed.

[0059] Objective: To analyze the position of the condyle and the abnormality of the lower jaw in the sagittal, vertical and horizontal spatial structures by using the quantitative evaluation algorithm, and to obtain a new lower jaw position by adjusting the position of the condyle, i.e. the position of the repositioned lower jaw.

[0060] The distance of the outer surface of the condyle in the fossa in the three-dimensional space needs to be accurate to two decimal places, so as to reduce errors and improve accuracy, so as to ensure the subsequent treatment effect.

[0061] According to the reasonable position of the lower jaw, the corresponding occlusion data is deduced.

[0062] The patient's intraoral model is obtained using a 3D oral scanning instrument. The dental arch model and the dental arch in the CT are overlapped in the model software by three-dimensional overlapping. The new occlusion position is obtained by repositioning the mandibular position according to the reasonable position of the condyle and the model after scanning the mouth. The occlusion position data of the model is the occlusion position of the model after scanning the mouth, and the occlusion position is output as the occlusion of the model after repositioning the mandible. Thus, the relative relationship between the upper and lower dental arches in the three-dimensional space after repositioning the mandible is accurately copied.

[0063] The mandible is positioned according to the distance in the three-dimensional space of the condyle in the joint fossa. The occlusion relationship of the upper and lower dental arches is accurately copied by overlapping and outputting the model data.

[0064] The high-precision comparison and output of the model data improve the accuracy of subsequent jaw pad production, reduce the doctor's clinical grinding work, and improve the patient's wearing comfort.

[0065] The upper jaw plane is derived according to the patient's visual axis plane.

[0066] The visual axis plane position of the patient is analyzed and derived from the three-dimensional model scanned by the patient. The upper jaw plane is calculated based on the determined angular relationship between the visual axis plane and the upper jaw plane in the orthodontic professional calculation method.

[0067] The determination of the visual axis plane can be derived from a trained AI model. The AI model of the visual axis plane is trained by professional orthodontists based on a large number of visual axis plane judgment cases, improving the medical support and data support of the vertical positioning of the upper molar and anterior teeth. It provides a reference line for the vertical design of the subsequent invisible aligner. Through the trained AI model, the visual axis plane of the patient is automatically derived on the three-dimensional model of the patient, and according to the visual axis plane, the artificial judgment deviation is reduced, and the efficiency of subsequent occlusion reconstruction is improved. Combined with CT data, the incisal edge position is accurately positioned to ensure the stability of the anterior teeth in the sagittal direction.

[0068] The incisal guide and condylar guide relationship can be optimized based on the calculated upper jaw plane.

[0069] The condylar guide slope is calculated to derive the incisal guide plane and determine the relative position of the upper and lower anterior teeth.

[0070] According to the derived mandibular position and upper jaw plane in the previous step, an electronic jaw frame is formed, the mouth scanning model is placed on the electronic jaw frame, the spatial position relationship between the upper jaw and the temporomandibular joint is captured in real time, and the three-dimensional trajectory of the condyle during mandibular movement is recorded. The angle between the condylar guide slope and the horizontal plane is calculated and output. The condylar guide slope is obtained, and the derived condylar guide slope is substituted into the calculation formula of the inclination angle of the incisal guide plate to derive the inclination angle of the incisal guide plate. The inclination angle of the incisal guide plate is determined to determine the incisal guide plane.

[0071] The formula for calculating the incisal guide table's tilt angle is: condylar guide inclination / 8 + 12. On an adjustable electronic occlusal frame, the incisal guide plane is determined by adjusting the tilt angle of the incisal guide table.

[0072] The relative positions of the upper and lower anterior teeth are determined by combining the occlusal data obtained from the incisal guide plane on the 3D model.

[0073] Vertical direction: The height of the incisal guide plane determines the depth of the anterior overbite. For example, the greater the incisal guide angle, the deeper the overbite.

[0074] Horizontal direction: The anterior and posterior position of the incisal guide plane affects the overjet relationship. For example, when the anterior teeth protrude, the incisal guide plane tilts forward, and the overjet increases.

[0075] Labiolingual orientation: The degree of matching between the incisal guide plane and the arch curvature affects the lingual morphology of the anterior teeth. In cases of reverse occlusion, the angle of the incisal guide plane needs to be adjusted.

[0076] The shape and position of the anterior tooth positioning device and the shape and height of the posterior tooth brace device are designed based on the position of the upper and lower anterior teeth using the incisal guide plane.

[0077] By fully incorporating joint movement factors into occlusion determination and the determination of the maxillary and mandibular planes, the method of simulating mandibular movement and determining the occlusal position through motion plane simulation replaces the traditional on-the-fly orthodontic approach, thus improving the accuracy of correction.

[0078] The jaw pad was fabricated to verify that the target position conformed to muscle function and joint comfort.

[0079] An anatomical jaw pad is fabricated at the determined mandibular repositioning location, and an electronic jaw frame is used to simulate the lateral and anterior protrusion movements of the mandible in the current jaw position, eliminating lateral and anterior interference. Figure 6 This process verifies that the target position aligns with muscle function and joint comfort, avoiding positioning deviations. Verification using the jaw pad allows for early detection of muscle function mismatches, preventing joint clicking after correction and supporting long-term efficacy monitoring. It also ensures greater comfort for patients wearing invisible braces later, reducing treatment risks.

[0080] Based on calculated data such as the mandibular position, a traditional jaw pad is fabricated using specialized dental materials, such as self-curing resin or thermoforming materials, through processes such as model making, material pressing, or cutting. The thickness and shape must meet design requirements to ensure accurate guidance of the mandible to the target position.

[0081] Mandibular position verification: The patient wears the prepared jaw pad, and through clinical examination, such as checking the occlusal contact points with occlusal paper and recording the mandibular movement trajectory, it is determined whether the mandibular position meets the design requirements, ensuring that the condyle position is stable and the occlusal contact is uniform when the mandible is in centric occlusion.

[0082] Muscle evaluation: through muscle palpation, electromyography and other means, the functional status of related muscles such as masticatory muscles is evaluated, and the muscle position coordination is confirmed. Under normal circumstances, the muscles should not be abnormally increased or inhibited.

[0083] Muscle palpation includes checking masticatory muscles, temporal muscles and other ways for tenderness and tension; electromyography includes measuring the strength and coordination of muscle activity.

[0084] Comfort check: Ask the patient's subjective feeling, understand if there is pain, mucosal irritation, foreign body sensation and other discomfort during wearing, if there is obvious discomfort, record the specific position and nature.

[0085] If the verification fails, re-enter the "software analysis of mandibular position" step for adjustment.

[0086] Combine with the design of the occlusal onlay attachment of the invisible aligner plan.

[0087] Based on the verified mandibular position and maxillary plane position data, the inclination and vertical height of the invisible aligner design are determined based on the maxillary plane in this jaw position, and the three-dimensional position of the anterior teeth of the invisible aligner design is determined by using the incisive guide plane angle. Based on the target position, a 3D printed invisible aligner is designed, which uses medical grade TPU material to improve biocompatibility.

[0088] The invisible aligner produced integrates multi-directional adjustment structure: including posterior teeth horizontal fixed component, molar vertical inclination structure, anterior teeth sagittal fixed device. The patient can move the teeth in a designed way in a jaw position where the condyle is more suitable relative to the skull and the muscles and nerves are more comfortable, and can fully meet the wearing and eating requirements.

[0089] The molar vertical inclination structure can further relieve joint pressure.

[0090] When the mandible is in the verified mandibular position, the inclination and vertical height of the invisible aligner design are determined by the maxillary plane in this jaw position, which is determined in the previous step; the three-dimensional position of the anterior teeth of the invisible aligner design is determined by using the incisive guide plane angle calculated in the previous step, which ensures that the jaw is suitable for the positioning requirements, and allows the patient to move the teeth during chewing to align the teeth and rebuild the occlusal position.

[0091] The design method of the occlusal onlay attachment of the invisible aligner plan is:

[0092] The form and function of the invisible aligner combined with the onlay mainly reflect in the following three aspects:

[0093] I. Onlay form model acquisition method

[0094] Extract the crown 1 / 3 part of the tooth model that needs to add the inlay tooth, including the jaw surface shape, tooth tip, tooth tip bevel and central fossa shape, but not covering the tooth below the crown 2 / 3, which is used as the added model of the inlay kit in the invisible aligner.

[0095] II. Inlay placement method

[0096] Based on the obtained model, place the inlay kit on the tooth arrangement software. In terms of height, the functional tip of the kit (maxillary palatal tip, mandibular buccal tip) needs to be placed on the designated jaw plane; in terms of buccal-lingual inclination, the maxillary functional tip is opposite to the mandibular central fossa, and the mandibular functional tip is opposite to the maxillary central fossa; in terms of mesial-distal inclination, it is consistent with the tooth movement direction designed in the scheme.

[0097] III. Meet the tooth movement requirements

[0098] The edge of the inlay kit model needs to be wider than the added tooth to achieve wrapping of the added tooth and meet its movement requirements in it. The vertical height, horizontal width and sagittal length of the model can be adjusted to ensure that the model can effectively wrap the added tooth.

[0099] The occlusal inlay attachment is a jaw pad, and the jaw pad device is divided into anterior tooth device and posterior tooth device

[0100] Anterior tooth device design idea: Inlays are generally only set on maxillary teeth, and the aligner for maxillary teeth is converted from the aligner for mandibular teeth, so the maxillary and mandibular teeth can also meet the occlusal matching requirements.

[0101] First, simulate the shape of the lower anterior teeth with the aligner, that is, simulate the space of two layers of aligner thickness on the surface of the lower teeth (reserve one layer for installing inlays), reverse the lower jaw shape to the upper jaw, and virtually simulate the shape of the upper jaw according to the shape. Then print the model to press the invisible aligner (invisible aligner), and get the invisible aligner with anatomical repositioning jaw pad.

[0102] Posterior tooth device design idea: Copy the occlusal surface shape of the upper and lower second molars, place and connect them according to the correct occlusal plane, and leave a space of the thickness of the aligner in the middle. Transcribe this shape to the tooth model and print it out to get the invisible aligner with anatomical occlusal inlay.

[0103] The inlay is integrally formed with the invisible aligner, and the side facing the tooth is prevented. The invisible aligner is divided into multiple invisible aligners with different shapes according to different treatment stages in the entire treatment plan, but the shape of the inlay cooperating with the invisible aligner should be consistent, which is the shape of the natural tooth in advance. Only the angle and height are placed according to the requirements of the scheme in different stages, and the angle and height are adaptively changed according to the treatment process of the aligner on the teeth.

[0104] By designing a bite inlay on the invisible aligner to form a mandibular repositioning jaw pad device, its role and advantages in subsequent procedures are as follows:

[0105] Synchronous correction function: one-time realization of mandibular position adjustment and tooth alignment, shortening the treatment cycle.

[0106] Comfort improvement: invisible material avoids mucosa irritation, and compliance is greatly improved compared with traditional brackets.

[0107] Integration of functions: traditional jaw pads and invisible aligners are separated in function, while this technology combines bite inlays with invisible aligners, making the device have both jaw position maintaining and tooth correction functions.

[0108] Improve the stability of the jaw position: the problem of unstable jaw position caused by the lack of jaw position maintaining structure in invisible aligners is effectively solved in this technology. The bite inlay, as a special jaw position positioning structure, precisely fits the occlusal surface of the upper and lower teeth, and can limit the abnormal movement of the lower jaw during daily oral activities such as chewing and swallowing.

[0109] Enhance treatment synergy: the problem of poor treatment synergy due to functional fragmentation has been improved with the application of this technology. The combination of bite inlays and invisible aligners allows the jaw position maintaining and tooth correction processes to be coordinated on the same device. During the tooth movement correction process, the bite inlay maintains a stable jaw position relationship, ensuring that the teeth move on the correct jaw position basis; at the same time, the correction force applied by the invisible aligner also has a small adjusting effect on the jaw position, and the two work together and influence each other, allowing doctors to better plan and coordinate when developing treatment plans, fully leveraging the advantages of both functions to improve the efficiency and final results of orthodontic treatment.

[0110] Treatment evaluation feedback.

[0111] After the treatment is completed, CT is taken again to verify the patient's mandibular position, dental occlusion relationship, and muscle position coordination and patient comfort.

[0112] After the treatment is completed, CT is taken again to verify the patient's mandibular position, dental occlusion relationship, and muscle position coordination and patient comfort.

[0113] The post-treatment intraoral model of the patient is obtained using a 3D oral scanning instrument, the dental arch model obtained by the oral scanning is overlapped with the dental arch in the CT in the 3D software through three-dimensional overlapping, the oral scanning model is placed on the electronic jaw frame to simulate the mandibular protrusion and lateral movement, the condylar guide inclination and the incisal guide inclination are obtained, and whether the condylar guide inclination and the incisal guide inclination match is calculated by substituting into the formula. The treatment effect is verified, the change degree of the condylar position relative to the skull is evaluated, and the occlusion establishment is evaluated, including whether there is occlusion interference, and the doctor is suggested to remove the factors unfavorable to the treatment effect.

[0114] The correction evaluation can quantify the correction effect, such as the error of the mandibular position and the degree of joint pressure relief, which can be directly known. And through the correction feedback, a basis can be provided for algorithm iteration and clinical optimization.

[0115] The post-correction repair auxiliary tool.

[0116] The CT, intraoral model obtained by oral three-dimensional scanning, X-ray lateral film and other data after orthodontic treatment are integrated to construct a full-dimensional patient model, whether the patient's mandible has occlusal tightness in this jaw position is analyzed, and the influence on the patient's mastication and the treatment stability is evaluated. The dental arch and tooth tip shape is designed by using 3D software, and a repair guide plate and a model tool are made by using high-precision model replication technology to match the repair material to assist in repairing the posterior tooth tip nest. The repair material is preferably ceramic, resin and the like.

[0117] A high-precision repair guide plate is provided for the poor relationship of the posterior tooth tip nest after correction, which assists the doctor in performing resin or porcelain repair to establish tight occlusion.

[0118] The repair steps can provide long-term stability for the correction, optimize the occlusal contact, and reduce the recurrence rate after correction. And it can solve the problem of occlusal tightness caused by the limitation of tooth movement in traditional orthodontics. At the same time, the repair guide plate and the model tool can be used throughout the whole process, from diagnosis (three-dimensional positioning) → design (target position simulation) → treatment (invisible correction) → verification (dynamic feedback) → repair (long-term stability), forming a closed loop.

[0119] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the patent of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A design method for invisible braces combined with inlay-type occlusal pads based on digital analysis, characterized in that, include CT scanning equipment was used to obtain three-dimensional spatial data of the patient's mandible and skull base; The correct position of the mandible relative to the skull base was determined by analyzing the acquired three-dimensional structural data. Based on the reasonable mandibular position, the corresponding occlusal data are derived; Determine the maxillary plane based on the patient's visual axis plane; Calculate the condylar guide angle to obtain the incisal guide plane and determine the relative positions of the upper and lower anterior teeth; Design of occlusal inlay attachments in conjunction with clear aligner solutions; The design method for the occlusal inlay attachments of the upper and lower jaws in the invisible aligner solution is as follows: Anterior appliance: simulates the shape of the mandibular anterior teeth after wearing braces, reverses the mandibular shape to the maxilla, creates a model based on the maxilla shape and presses the invisible aligner. Posterior appliance: The occlusal surfaces of the upper and lower jaws are aligned and aligned in the correct occlusal plane, and this shape is transferred to a dental model to create an invisible aligner.

2. The design method for invisible braces combined with inlay-type occlusal pads based on digital analysis according to claim 1, characterized in that, It also includes orthodontic assessment feedback, which involves taking another CT scan to verify the patient's mandibular position, occlusal relationship, muscle coordination, and patient comfort.

3. The design method for invisible braces combined with inlay-type occlusal pads based on digital analysis according to claim 1, characterized in that, It also includes restorative tools after orthodontic treatment. By analyzing whether the patient's mandible has a loose bite in this jaw position, the impact on the patient's chewing and treatment stability is assessed. The tooth structure and cusp morphology are designed using a three-dimensional model, and restorative guides and other model tools are made accordingly.

4. The design method for invisible braces combined with inlay-type occlusal pads based on digital analysis according to claim 1, characterized in that, The CT scan is a large-field-of-view cone-beam CT scan of the oral and maxillofacial region, covering the entire maxillofacial region of the patient.

5. The design method for invisible braces combined with inlay-type occlusal pads based on digital analysis according to claim 1, characterized in that, To analyze the correct position of the mandible relative to the skull base, the sagittal plane of a three-dimensional model of the entire maxillofacial region was used as the sagittal plane. The condyle was located by identifying its most convex point in the vertical, sagittal, and horizontal three-dimensional directions. The distance between the condyle and the glenoid fossa in the three-dimensional plane was then measured. Based on the determined condyle position and its distance relative to the glenoid fossa, the position of the mandible was deduced. Finally, the mandible was moved three-dimensionally based on the correct position of the condyle in the glenoid fossa to confirm its position.

6. The design method for invisible braces combined with inlay-type occlusal pads based on digital analysis according to claim 1, characterized in that, To obtain occlusal data, a 3D oral scanner is used to obtain the corresponding intraoral model of the patient. In the model software, the oral scan dental arch model and the dental arch in the CT scan are superimposed in a three-dimensional way. After the mandibular position is repositioned with the oral scan model according to the reasonable position of the condyle, a new occlusal position is obtained. This occlusal position data is used as the occlusal position of the oral scan model, and this occlusal position is output as the oral scan data of mandibular repositioning and occlusion.

7. The design method for invisible braces combined with inlay-type occlusal pads based on digital analysis according to claim 1, characterized in that, To obtain the maxillary plane, the visual axis plane is first derived from the patient's three-dimensional model. The maxillary plane is then derived by combining the relationship between the visual axis plane and the maxillary plane.

8. The design method for invisible braces combined with inlay-type occlusal pads based on digital analysis according to claim 1, characterized in that, To obtain the incisional guide plane, the mandibular position and the maxillary plane form an electronic jaw frame. The oral scanning model is placed on the electronic jaw frame to capture the spatial positional relationship between the maxilla and the temporomandibular joint in real time. The three-dimensional trajectory of the condyle during mandibular movement is recorded, and the angle between the condyle's movement trajectory in the glenoid fossa and the horizontal plane is calculated and output to obtain the condylar guide inclination. The inclination angle of the incisional guide plate is obtained from the condylar guide inclination, thereby determining the incisional guide plane.

9. The design method for invisible braces combined with inlay-type occlusal pads based on digital analysis according to claim 8, characterized in that, The incisal guide plane, combined with occlusal data, is used to locate the relative positions of the upper and lower anterior teeth on a 3D model.

10. The design method of invisible braces combined with inlay-type occlusal pads based on digital analysis according to claim 1, characterized in that, It also includes creating jaw pads to verify that the target position conforms to muscle function and joint comfort, creating anatomical jaw pads at the determined mandibular repositioning position, and identifying problems in advance through patient wearing.

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