Digital complete denture joint relocation repairing method and device and medium
Through the digital full denture joint repositioning and repair method, three-dimensional data files are used to determine and update the jaw joint position, which solves the problem of inaccurate jaw joint position diagnosis in traditional methods and improves the wearing effect of dentures.
Patent Information
- Application Number
- CN202411464731.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-01-21
AI Technical Summary
During the production of traditional full-mouth dentures, the location of the temporomandibular joint was not accurately diagnosed, resulting in inaccurate occlusal relationships, which in turn affected the wearing effect of the dentures.
The digital full denture joint repositioning and repair method is used to obtain the patient's CT file, facial scan STL file and occlusion STL file to generate a three-dimensional data file, determine the target jaw joint position, and update the three-dimensional data file based on this, and finally complete the full mouth Denture Design.
The consideration of the mandibular joint position in the design of the full -mouth dentures, the re -positioning and repair of the vibrato joints, the accuracy of the occlusion relationship of the bite, and the improvement of the wearing effect of the denture.
Smart Images
Figure CN119326532A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of complete denture design, and in particular to a method, device and medium for digital complete denture joint repositioning and repair. Background Art
[0002] Full-mouth removable dentures are the main method for clinical treatment of edentulous patients.
[0003] In clinical practice, the production of traditional full-mouth removable dentures usually requires five visits in a step-by-step process to complete the preparation of the initial impression, the preparation of the final impression, the determination and preparation of the jaw relationship, the trial fitting, the initial fitting, and finally the full-mouth removable denture.
[0004] However, the traditional complete denture production process fails to accurately diagnose the position of the temporomandibular joint of edentulous patients, which can lead to inaccurate occlusal relationship and poor wearing effect of the complete denture. Summary of the invention
[0005] In order to help improve the wearing effect of complete dentures, the present application provides a digital complete denture joint repositioning repair method, equipment and medium.
[0006] In a first aspect, the present application provides a digital full denture joint repositioning and repair method, which adopts the following technical solution: A digital complete denture joint repositioning and repair method, the method comprising: Obtaining a CT file acquired while an edentulous patient is wearing a centric occlusal tray secured in the patient's mouth by bite registration silicone; Acquire a face scan STL file acquired by performing a face scan on the patient, wherein the face scan STL file includes a first STL file acquired when the patient wears a centric occlusal tray, and a second STL file acquired when the patient does not wear the centric occlusal tray; Obtaining the occlusal STL file corresponding to the patient, wherein the occlusal STL file is obtained by combining the upper and lower jaw models corresponding to the patient with the occlusal recording silicone and scanning; the upper and lower jaw models are used to record the mucosal morphology of the upper and lower jaws of the patient; Generate a three-dimensional data file based on the model STL file corresponding to the upper and lower jaw models, the face scan STL file, the CT file and the occlusion STL file, wherein the three-dimensional data file includes the maxillofacial soft tissue morphology, the oral mucosal surface and the relative relationship between the upper and lower jaws; determining a target jaw joint position based on the three-dimensional data file; Updating the three-dimensional data file based on the target jaw joint position to obtain an updated three-dimensional data file; A complete denture design is performed based on the updated three-dimensional data file.
[0007] By adopting the above technical solution, after generating a three-dimensional data file, the target jaw joint position can be further determined based on the three-dimensional data file, and the three-dimensional data file can be updated based on the target jaw joint position. Finally, a full denture can be designed based on the updated three-dimensional data file. In this way, the jaw joint position can be considered in the process of full denture design, which can help to achieve jaw joint repositioning and repair through full dentures, improve the accuracy of the determined occlusal relationship, and thus improve the wearing effect of the full denture.
[0008] Optionally, the designing of a complete denture according to the updated three-dimensional data file includes: According to the updated three-dimensional data file, a trial denture with upper and lower anterior teeth is designed to obtain a trial denture STL file, and the trial denture is made according to the trial denture STL file, and the trial denture is worn in the patient's mouth to verify the correctness of the occlusal plane, determine the horizontal jaw plane and record the occlusal relationship, and at the same time make a final impression; Scanning the final impression and the occlusal relationship to obtain a final impression film STL file of the final impression recording the occlusal relationship; The complete denture design is performed according to the final print film STL file.
[0009] By adopting the above technical scheme, after determining the updated three-dimensional data file, a trial denture can be set up first, and the occlusal plane with abnormal trial can be correctly verified, and the final impression STL file recording the occlusal relationship can be obtained, so that the full denture can be designed based on the final impression STL file, which can help improve the accuracy of the final determined occlusal plane and occlusal relationship, and further help improve the wearing effect of the full denture.
[0010] Optionally, the complete denture includes a base and a dentition, and the design of the complete denture according to the final print film STL file includes: Generate a base STL file corresponding to the base based on the morphology of the mucosal surface and the mucosal turning point of the final impression recorded in the final impression film STL file, so as to generate a base based on the base STL file; A dentition STL file is generated based on the occlusal plane and the anterior teeth arrangement state and position recorded in the final print film STL file, and the dentition is generated based on the dentition STL file, and the dentition is fixed on the base to obtain the complete denture.
[0011] Optionally, the upper and lower jaw models are plaster models obtained by taking molds of the upper and lower jaws of the patient using silicone rubber and casting them. Before generating a three-dimensional data file based on the model STL file corresponding to the upper and lower jaw models, the face scan STL file, the CT file and the occlusion STL file, the further step includes: The upper and lower jaw models are scanned to obtain the STL file of the model.
[0012] By adopting the above technical solution, since the model STL file is obtained by scanning the upper and lower jaw plaster models, and the upper and lower jaw models can better reflect the information such as the mucosal state of the upper and lower jaws of the patient, it can ensure the accuracy of the model STL file while reducing the difficulty of obtaining the model STL file.
[0013] Optionally, scanning the upper and lower jaw models to obtain the model STL file includes: Scanning the upper and lower jaw models to obtain an initial STL file; The initial STL file is modified based on the oral scan STL file corresponding to the patient to obtain the model STL file, where the oral scan STL file is obtained by performing an intraoral scan on the patient.
[0014] By adopting the above technical solution, the initial STL file obtained by scanning the upper and lower jaw models can be corrected based on the oral scan STL file to obtain the final model STL file. This can help reduce the impact of the mold taking error of the upper and lower jaw models on the accuracy of the model STL file, thereby improving the accuracy of the model STL file.
[0015] Optionally, determining the target jaw joint position based on the three-dimensional data file includes: Performing jaw joint recognition on the three-dimensional data file to obtain the original jaw joint position; The original jaw joint position is adjusted to obtain the target jaw joint position.
[0016] By adopting the above technical solution, the original jaw joint position can be reasonably adjusted based on the original jaw joint position determined based on the three-dimensional data file, which can help put the jaw joint in the best position and further improve the wearing comfort of the full denture.
[0017] Optionally, updating the three-dimensional data file based on the target jaw joint position to obtain an updated three-dimensional data file includes: The virtual jaw frame corresponding to the three-dimensional data file is adjusted based on the target jaw joint position to obtain the updated three-dimensional data file, so that the jaw joint position corresponding to the updated three-dimensional data file matches the target jaw joint position.
[0018] By adopting the above technical solution, when the jaw joint position changes, the virtual jaw frame can be further adjusted based on the modified jaw joint position, so that the jaw joint position in the virtual jaw frame actually used to design the full denture matches the target jaw joint position, which can help to further improve the wearing comfort of the designed full denture.
[0019] Optionally, adjusting the virtual jaw frame corresponding to the unit data file based on the target jaw joint position to obtain the updated three-dimensional data file includes: generating reference jaw position relationships under at least two reference expressions based on the target jaw joint position; For each of the reference jaw position relationships, determining whether the virtual jaw frame matches the reference jaw position relationship; In the case where the virtual jaw frame does not match the reference jaw position relationship, adjusting the virtual jaw frame based on the reference jaw position relationship so that the virtual jaw frame matches the reference jaw position relationship; When the virtual jaw frame matches each of the reference jaw position models, the updated three-dimensional data file is determined based on the virtual jaw frame.
[0020] By adopting the above technical scheme, it is possible to determine whether to correct the virtual jaw frame and the method to adjust the virtual jaw frame based on the matching relationship between the virtual jaw frame and the reference jaw position of the target jaw joint position under at least two reference expressions, and adjust the virtual jaw frame. This can help improve the accuracy of the updated three-dimensional data file, and further help improve the wearing effect of the designed full-mouth removable denture.
[0021] In a second aspect, the present application provides an electronic device, which adopts the following technical solution: An electronic device, comprising: at least one processor; Memory; At least one application, wherein the at least one application is stored in a memory and configured to be executed by at least one processor, and the at least one application is configured to: execute any one of the digital full denture joint repositioning repair methods provided in the first aspect.
[0022] In a third aspect, the present application provides an electronic device, which adopts the following technical solution: A computer-readable storage medium stores a computer program, which, when executed in a computer, causes the computer to execute any one of the digital complete denture joint repositioning and repair methods provided in the first aspect.
[0023] In summary, the present application includes at least one of the following beneficial technical effects: 1. The position of the jaw joint can be considered during the design of complete dentures, which can help to achieve jaw joint repositioning and repair through complete dentures, improve the accuracy of the determined occlusal relationship, and thus improve the wearing effect of complete dentures.
[0024] 2. Since the upper and lower jaw models and the bite record silicone are scanned together to obtain the bite STL file, and the three-dimensional data file is generated in combination with the bite STL file, the relative relationship between the upper and lower jaws in the three-dimensional data file can be determined more accurately, which can help improve the accuracy of the determined bite relationship. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 It is a flow chart of a digital full denture joint repositioning and repairing method provided in an embodiment of the present application; Figure 2 is a front view of a three-dimensional avatar provided in an embodiment of the present application; Figure 3 It is a left view of a three-dimensional avatar provided in an embodiment of the present application; Figure 4 It is a right view of a three-dimensional avatar provided in an embodiment of the present application; Figure 5 is a flow chart of a complete denture design method provided in an embodiment of the present application; Figure 6 This is a digital tooth arrangement effect diagram of a full denture provided in an embodiment of the present application; Figure 7 It is a right view of a digital tooth arrangement effect provided by an embodiment of the present application; Figure 8 It is a left view of a digital tooth arrangement effect provided by an embodiment of the present application; Fig. 9 It is a flow chart of a method for obtaining a model STL file provided in an embodiment of the present application; Fig.10 It is a flowchart of a three-dimensional file update method provided in an embodiment of the present application; Fig.11 It is a structural schematic diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical solutions and advantages of this application more clear, the following Figure 1-11 It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0027] The present application embodiment discloses a digital full-mouth denture joint repositioning and repair method. Figure 1 , digital full denture joint repositioning repair method, including: Step 101, obtaining a CT file collected when the edentulous patient wears a centric occlusal tray, and the centric occlusal tray is fixed in the patient's mouth by bite registration silicone.
[0028] Specifically, since the shape of the bite record silicone will change when the patient bites the centric occlusal tray, the patient's upper and lower jaw opening and closing status can be collected, which can help to preliminarily determine the occlusal relationship. It should be added that in the actual collection process, the patient needs to bite the centric occlusal tray in an appropriate manner under the guidance of a doctor or professional, which can help ensure the validity of the status recorded by the bite record silicone.
[0029] In one example, the bite registration silicone is a radiopaque bite silicone, that is, the bite registration silicone is radiopaque and can block the penetration of X-rays, so that it is convenient to perform analysis on the CT file.
[0030] In actual implementation, CBCT can be used to collect CT files, which can help improve the quality of CT files while shortening the imaging time.
[0031] Step 102, obtaining a facial scan STL file of the patient.
[0032] The face scan STL file includes a first STL file acquired when the patient wears a centric occlusal tray, and a second STL file acquired when the patient does not wear a centric occlusal tray.
[0033] By scanning the patient's face, the patient's facial image can be collected, so that the patient's facial contour, facial proportions and other information can be determined, which can help to reconstruct the patient's head in three dimensions. At the same time, since the face scan STL file includes the second STL file collected when the patient wears and does not wear the centric occlusal tray, it can help to reconstruct the patient's head in different states, which can help to ensure the accuracy of the patient's head 3D reconstruction results.
[0034] Step 103, obtaining the occlusal STL file corresponding to the patient. The occlusal STL file is obtained by combining the upper and lower jaw models corresponding to the patient with the occlusal record silicone and scanning.
[0035] Among them, the upper and lower jaw models are used to record the mucosal morphology of the upper and lower jaws of the patient. Generally speaking, the upper and lower jaw models include the upper jaw model and the lower jaw model, and the relative position relationship between the upper jaw model and the lower jaw model is adjustable, which can help simulate the user's occlusion state through the upper and lower jaw relationship.
[0036] In this embodiment, since the bite record silicone can reflect the opening and closing state of the patient's upper and lower jaws, by combining the upper and lower jaw models with the bite record silicone, the relative position relationship between the upper and lower jaws when the user is in a biting state can be simulated, which can help to perform three-dimensional reconstruction of the user's biting state.
[0037] In actual implementation, the upper and lower jaw models can also reflect information such as the jaw morphology and maxillofacial soft tissue morphology.
[0038] Step 104, generating a three-dimensional data file based on the model STL files corresponding to the upper and lower jaw models, the face scan STL file, the CT file, and the occlusion STL file.
[0039] Among them, the three-dimensional data file includes the maxillofacial soft tissue morphology, oral mucosal surface and the relative relationship between the upper and lower jaws.
[0040] The model STL file can be obtained by three-dimensional scanning of the upper and lower jaw models, or can also be collected by oral scanning of the patient. In this case, the upper and lower jaw models are produced based on the model STL file.
[0041] The 3D data file can be represented by a 3D head image, and accordingly, the 3D head image contains the maxillofacial tissue morphology, the oral mucosal surface, and the relative relationship between the upper and lower jaws. Furthermore, the upper and lower jaws of the 3D head image can be separated, which can help design full dentures based on the 3D head image.
[0042] Correspondingly, the model STL file, the face scan STL file, the CT file and the occlusal STL file generate a three-dimensional data file, including: fitting the model STL file, the face scan STL file, the CT file and the occlusal STL file to generate a three-dimensional head image. Specifically, the maxillofacial tissue morphology of the patient is reconstructed based on the face scan STL file and the CT file; the oral mucosa of the patient is reconstructed based on the model STL file and the CT file; the relative relationship between the upper and lower jaws of the patient is reconstructed based on the face scan STL file, the model STL file and the occlusal STL file.
[0043] In one example, the three-dimensional avatar reference Figure 2 , Figure 3 and Figure 4 Specifically, Figure 2 This is the front view of the three-dimensional head. Figure 3 is the left view of the three-dimensional image, Figure 4 It is the right view of the three-dimensional image.
[0044] Step 105, determining the target jaw joint position based on the three-dimensional data file.
[0045] Specifically, the jaw joint, also known as the temporomandibular joint (TMJ), is a joint system in the human body that is responsible for connecting the mandible and the temporal bone.
[0046] In one example, determining a target jaw joint position based on a three-dimensional data file includes: performing jaw joint recognition on the three-dimensional data file to obtain an original jaw joint position; and adjusting the original jaw joint position to obtain a target jaw joint position.
[0047] The original jaw joint position may be adjusted manually by a staff member, or may be adjusted automatically based on the positional relationship between the various structures of the jaw joint.
[0048] Specifically, since the soft tissues and other parts of fully edentulous patients may be loose or atrophied, and changes in these parts will affect the position of the jaw joint, the original jaw joint position directly identified based on the three-dimensional data file may not be the optimal position of the jaw joint. Therefore, after determining the original jaw joint position, reasonable adjustments to the original joint position can help further improve the wearing comfort of full dentures.
[0049] In actual implementation, the original jaw joint position cavity obtained by identification may be directly used as the target jaw joint position.
[0050] Optionally, the jaw joint is identified in the three-dimensional data file to obtain the original jaw joint position, including: identifying the articular disc, condyle, fossa and surrounding soft tissue in the three-dimensional data file to obtain the original jaw joint position.
[0051] Step 106, updating the three-dimensional data file based on the target jaw joint position to obtain an updated three-dimensional data file.
[0052] Specifically, since the jaw joint is an important part of the oral system, its position directly affects the movement and function of the mandible. Therefore, after determining the target jaw joint position, the three-dimensional data file needs to be adjusted based on the target jaw joint position so that the mandible in the three-dimensional avatar corresponding to the three-dimensional data file can achieve normal movement and function, thereby improving the accuracy of the three-dimensional data file. The corresponding relationship between the jaw joint position and the three-dimensional data file is preset.
[0053] In one example, the three-dimensional data archive can be represented by a three-dimensional avatar, and correspondingly, the updated three-dimensional archive data is represented by the updated three-dimensional avatar. The three-dimensional data archive is updated based on the target jaw joint position to obtain the updated three-dimensional data archive, including: updating the three-dimensional avatar based on the target jaw joint position to obtain the updated three-dimensional avatar.
[0054] Step 107, designing a complete denture according to the updated three-dimensional data file.
[0055] Specifically, since the updated three-dimensional data file includes the maxillofacial soft tissue morphology, oral mucosal surface and the relative relationship between the upper and lower jaws, the actual oral condition of the patient can be simulated based on the updated three-dimensional data file, and then full denture design can be performed based on the three-dimensional data file.
[0056] The implementation principle of a digital full denture joint repositioning and restoration method in an embodiment of the present application is as follows: obtaining a CT file collected when an edentulous patient wears a centric occlusal tray, the centric occlusal tray being fixed in the patient's mouth by an occlusal recording silicone; obtaining a face scan STL file collected by performing a facial scan on the patient, the face scan STL file including a first STL file collected when the patient wears the centric occlusal tray, and a second STL file collected when the patient does not wear the centric occlusal tray; obtaining the patient's corresponding occlusal STL file, the occlusal STL file being obtained by scanning the corresponding upper and lower jaw models of the patient combined with the occlusal recording silicone; the upper and lower jaw models are used to record the mucosal morphology of the upper and lower jaws of the patient; generating a three-dimensional data file based on the model STL files corresponding to the upper and lower jaw models, the face scan STL file, the CT file and the occlusal STL file, the three-dimensional data file including the maxillofacial soft tissue morphology, the oral mucosal surface and the relative relationship between the upper and lower jaws; determining the target jaw joint position based on the three-dimensional data file; updating the three-dimensional data file based on the target jaw joint position to obtain an updated three-dimensional data file; and designing a full denture according to the updated three-dimensional data file. In the above technical scheme, after generating a three-dimensional data file based on the model STL file, facial scan STL file, CT file and occlusion STL file corresponding to the upper and lower jaw models, the target jaw joint position can be further determined based on the three-dimensional data file, and the three-dimensional data file can be updated based on the target jaw joint position. Finally, the full denture is designed based on the updated three-dimensional data file. In this way, the jaw joint position can be considered in the process of full denture design, which can help to achieve jaw joint repositioning and repair through full dentures, improve the accuracy of the determined occlusal relationship, and then improve the wearing effect of the full denture.
[0057] In addition, since the upper and lower jaw models and the bite record silicone are scanned together to obtain the bite STL file, and the three-dimensional data file is generated in combination with the bite STL file, the relative relationship between the upper and lower jaws in the three-dimensional data file can be determined more accurately, which can help improve the accuracy of the determined bite relationship.
[0058] In some embodiments, further, reference Figure 5 Step 107, designing a complete denture according to the updated three-dimensional data file, specifically includes the following steps: Step 201, design a trial denture with upper and lower anterior teeth according to the updated three-dimensional data file, obtain the trial denture STL file, make the trial denture according to the trial denture STL file, and wear the trial denture into the patient's mouth to verify the correctness of the occlusal plane, determine the horizontal jaw plane and record the occlusal relationship, and make a final impression at the same time.
[0059] Optionally, making a trial denture according to the trial denture STL file includes: 3D printing a resin material according to the trial denture STL file to obtain the trial denture.
[0060] In one example, a horizontal jaw plane and an occlusal relationship are determined, including: using a Gothic bow to further adjust the vertical distance between the upper and lower jaws to determine the horizontal jaw plane, and when the vertical distance and the horizontal jaw plane are adjusted to appropriate positions, recording the occlusal relationship through a bite registration material (e.g., bite registration silicone).
[0061] Step 202, scanning the final impression and the occlusal relationship to obtain a final impression film STL file of the final impression recording the occlusal relationship.
[0062] Optionally, the final impression and the occlusal relationship are scanned to obtain a final impression film STL file of the final impression recording the occlusal relationship, including: splicing the material recording the occlusal relationship between the maxillary impression and the mandibular impression, and scanning the spliced structure to obtain the final impression film STL file.
[0063] Furthermore, the bite record material can be made of non-radioblocking material, that is, X-rays can pass through it. In this case, the final impression STL file can reflect the occlusal relationship without including the image corresponding to the bite record material. This makes it easier to design a full denture based on the final impression STL file.
[0064] Step 203, designing a complete denture according to the occlusal STL file.
[0065] Optionally, the full denture design is performed according to the occlusal STL file, including: generating a base STL file corresponding to the base based on the morphology of the mucosal surface and the mucosal turning point of the final impression recorded in the final impression STL file, so as to generate the base based on the base STL file; generating a dentition STL file based on the occlusal plane and the anterior teeth arrangement morphology and position recorded in the final impression STL file, so as to generate the dentition based on the dentition STL file, and fixing the dentition on the base to obtain a full denture. In this way, the STL data of the base and the dentition can be determined respectively according to the final impression STL file, so as to process the base and the dentition respectively, and finally obtain a full denture.
[0066] In one example, generating a dentition STL file based on the occlusal plane and the anterior teeth arrangement form and position recorded in the final print film STL file includes: generating a digital arrangement of artificial teeth according to the jaw plane and the anterior teeth arrangement form and position to obtain a dentition STL file.
[0067] Optionally, a base is generated based on the base STL file, including: importing the base STL file into a 3D printing device to print out the base.
[0068] Optionally, generating the dentition based on the dentition STL file includes: importing the dentition STL file into a CNC machine tool, and obtaining the dentition by cutting a resin tooth resin disk.
[0069] In one example, the dentition is fixed on the base to obtain a complete denture, including: combining the base and the dentition, then performing a reverse mold, taking out the printed base, filling the gums with resin, and finally obtaining the final denture. In actual implementation, the dentition can also be directly bonded to the base obtained by 3D printing to obtain a complete denture.
[0070] In one example, reference Figure 6 , Figure 6 This is the effect picture after digital tooth arrangement of full dentures. For further reference Figure 7 and Figure 8 , Figure 7 This is the right view of the digital tooth arrangement effect. Figure 8 This is the left view of the digital tooth arrangement effect.
[0071] In the above embodiment, after determining the updated three-dimensional data file, a trial denture can be set first, and the occlusal plane with abnormal trial can be correctly verified, and a final impression STL file recording the occlusal relationship can be obtained, so that a full denture can be designed based on the final impression STL file, which can help improve the accuracy of the final determined occlusal plane and occlusal relationship, and further help improve the wearing effect of the full denture.
[0072] In some embodiments, the upper and lower jaw models are made by taking molds of the upper and lower jaws of the patient using silicone rubber and casting the resulting plaster models.
[0073] Correspondingly, step 104, before generating a three-dimensional data file based on the model STL file, face scan STL file, CT file and occlusal STL file corresponding to the upper and lower jaw models, also includes: scanning the upper and lower jaw models to obtain the model STL file. For example: performing desktop scan on the upper and lower jaw models to obtain the model STL file.
[0074] In the above technical solution, since the model STL file is obtained by scanning the upper and lower jaw plaster models, and the upper and lower jaw models can better reflect the information such as the mucosal state of the upper and lower jaws of the patient, it can ensure the accuracy of the model STL file while reducing the difficulty of obtaining the model STL file.
[0075] For further reference, Fig. 9 , scan the upper and lower jaw models to obtain the model STL file, including the following steps: Step 301, scan the upper and lower jaw models to obtain an initial STL file.
[0076] Step 302: modify the initial STL file based on the oral scan STL file corresponding to the patient to obtain a model STL file.
[0077] Among them, the oral scan STL file is obtained by scanning the patient's mouth.
[0078] Optionally, the initial STL file is corrected based on the oral scan STL file corresponding to the patient to obtain a model STL file, including: comparing the three-dimensional model corresponding to the oral scan STL file with the three-dimensional model corresponding to the initial STL file, and correcting the data of the different parts to obtain the model STL file.
[0079] In one example, the three-dimensional model corresponding to the oral scan STL file and the three-dimensional model corresponding to the initial STL file are converted to the same coordinate system and superimposed in the three-dimensional design software to determine the morphological difference area between the two three-dimensional models; for each morphological difference area, the data of the morphological difference area is adjusted to obtain the model STL file.
[0080] The method for determining the morphological difference region is preset, for example, the region with a similarity less than a preset similarity threshold is determined as the morphological difference region, and the similarity can be calculated in combination with the curvature of the region. In actual implementation, the minimum area value of the morphological difference region can be preset, in other words, the difference region with an area less than the minimum area value is not considered, so that the difficulty of model adjustment can be reduced while ensuring the accuracy of the model.
[0081] In another example, before adjustment, the key features of the three-dimensional model corresponding to the oral scan STL file and the three-dimensional model corresponding to the initial STL file can be extracted, such as jaw morphology, alveolar bone conditions and other features, which can be represented by at least one parameter such as position, morphology, density, angle, distance, etc.; the parameters of these key features are matched respectively, and the parameters of the key features with large differences are adjusted, and finally the model STL file is obtained. In one instance, for key features with large differences, the iterative closest point (ICP) algorithm or other nonlinear optimization algorithms can be used to adjust the parameters corresponding to the key features, which can help improve the accuracy of the parameters corresponding to the key features.
[0082] In the above example, since the STL file can be corrected by matching and adjusting the feature positions, this can help improve the rationality of the shape of the feature positions in the three-dimensional model corresponding to the corrected model STL file, and thus help improve the accuracy of the model STL file.
[0083] Furthermore, after automatic adjustment is performed by the method provided in the above example, the STL file obtained by automatic correction can be further adjusted by manual adjustment, which can help ensure the accuracy of the model STL file.
[0084] In the above implementation, since the initial STL file obtained by scanning the upper and lower jaw models can be corrected based on the oral scan STL file to obtain the final model STL file, this can help reduce the impact of the molding error of the upper and lower jaw models on the accuracy of the model STL file, thereby improving the accuracy of the model STL file.
[0085] In some embodiments, step 105, determining the target jaw joint position based on the three-dimensional data file, includes: extracting the original jaw joint position from the three-dimensional data file through a jaw joint extraction model; and determining the target jaw joint position based on the original jaw joint position.
[0086] Specifically, the jaw joint extraction model includes a feature matching module and / or a model matching module, wherein the feature matching module is used to extract image features of different image regions corresponding to the three-dimensional data file, and identify the original jaw joint position based on the image features.
[0087] In one example, the feature extraction module includes a curvature operator and / or a texture operator. The curvature operator estimates the curvature through the area of each voxel in the three-dimensional data file. Specifically, the curvature operator can first extract the surface model corresponding to the three-dimensional data file, and then calculate the principal curvature and the average curvature for each point on the surface model. In this way, the key structure of the jaw joint can be determined according to the change of the curvature. Generally speaking, the area with significant curvature change is the key structure of the jaw joint. The texture operator is used to extract the structural information that recurs in the image corresponding to the three-dimensional data file. Specifically, the gray level co-occurrence matrix (GLCM) corresponding to the three-dimensional data file can be generated, and texture features such as contrast, energy, entropy and other features can be extracted from the FLCM. In this way, the recognition of the jaw joint can be realized based on texture features.
[0088] In one example, the model matching module can be implemented by a pre-trained convolutional neural network (CNN). Specifically, the image corresponding to the three-dimensional data file can be sliced along one dimension or multiple dimensions to obtain a series of two-dimensional images, and the area corresponding to the jaw joint is marked whether the two-dimensional image contains the area. In this way, the initial convolutional neural network can be trained based on the two-dimensional image and the corresponding mark to obtain a pre-trained convolutional neural network, so that the trained convolutional neural network can recognize whether there is a jaw joint area in the input image, and then the jaw joint can be extracted from the three-dimensional data file.
[0089] By adopting the above technical solution, the jaw joint extraction model can be used to extract the original jaw joint position from the three-dimensional data file, so as to determine the target jaw joint position based on the original jaw joint position. This can simplify the process of determining the target jaw joint position and improve the efficiency of joint repositioning.
[0090] In some embodiments, step 106, updating the three-dimensional data file based on the target jaw joint position to obtain an updated three-dimensional data file, includes: adjusting the virtual jaw frame corresponding to the three-dimensional data file based on the target jaw joint position to obtain an updated three-dimensional data file, so that the jaw joint position corresponding to the updated three-dimensional data file matches the target jaw joint position.
[0091] Specifically, since the position of the jaw joint will affect the shape of the jaw frame, when the position of the jaw joint changes, the virtual jaw frame needs to be further adjusted based on the modified jaw joint position, so that the jaw joint position in the virtual jaw frame actually used to design the full denture matches the target jaw joint position, which can help to further improve the wearing comfort of the designed full denture.
[0092] In actual implementation, the virtual jaw frame can be adjusted manually, or the position of structures such as the articular disc, condyle, and fossa in the virtual jaw frame can be automatically adjusted based on the jaw joint position. For example, the relative position relationship and distance between different structures can be adjusted to obtain an updated unit data file.
[0093] It should be noted that, in this embodiment, the data in the three-dimensional data file is bound to the virtual jaw frame, so during the adjustment of the virtual jaw frame, the data in the three-dimensional data file will also change, thereby enabling the three-dimensional data file to be updated.
[0094] For further reference, Fig.10 , adjusting the virtual jaw frame corresponding to the unit data file based on the target jaw joint position to obtain an updated three-dimensional data file, including the following steps: Step 401, generating reference jaw position relationships under at least two reference expressions based on the target jaw joint position.
[0095] The reference expression is related to the state of the jaw joint, and the state of the jaw joint is different under different reference expressions. In actual implementation, the reference expression may include smile, surprise, etc., and the corresponding state of the jaw joint includes open, closed, left and right movement, etc. The corresponding relationship between the reference expression and the state of the jaw joint is preset.
[0096] The reference jaw position relationship includes the motion parameters of the jaw joint, such as the relative position relationship of each structure in the jaw joint under different states. Accordingly, the reference jaw position relationship under at least two reference expressions is generated based on the target jaw joint position, including: adjusting the target jaw joint position to the jaw joint state corresponding to the reference expression, and obtaining the reference jaw position relationship corresponding to the reference expression.
[0097] Step 402: for each reference jaw position relationship, determine whether the virtual jaw frame matches the reference jaw position relationship.
[0098] Specifically, determining whether the virtual jaw frame matches the reference jaw position relationship includes: determining whether the virtual jaw frame can move to a position that matches the reference jaw position relationship; if so, determining that the virtual jaw frame matches the reference jaw position relationship; if not, determining that the virtual jaw frame does not match the reference jaw position relationship.
[0099] Since the virtual jaw frame includes other structures besides the jaw joint, such as the jaw bone, during the movement of the virtual jaw frame, other structures besides the jaw joint will limit the movement of the virtual jaw frame. In order to improve the accuracy of the updated three-dimensional data file ultimately used to design the complete denture, it is necessary to verify the matching relationship between the virtual jaw frame and different reference jaw positions, which can help adjust the virtual jaw frame.
[0100] In actual implementation, the movement of the virtual jaw frame can be simulated by three-dimensional software, which makes it easier to match the virtual jaw frame with the reference jaw position.
[0101] Step 403: When the virtual jaw frame does not match the reference jaw position relationship, the virtual jaw frame is adjusted based on the reference jaw position relationship so that the virtual jaw frame matches the reference jaw position relationship.
[0102] Specifically, the method of adjusting the virtual jaw frame based on the reference jaw position relationship includes: adjusting the position of the structure of the virtual jaw frame based on the reference jaw position relationship, so that the virtual jaw frame can move to a position matching the reference jaw position relationship.
[0103] It should be noted that the shape and size of each structure in the virtual jaw frame are determined based on the three-dimensional data file, and the three-dimensional data file is determined based on the data collected from the patient's oral cavity and can reflect the actual situation of the patient's oral cavity. Therefore, during the adjustment process, only the position of each structure is adjusted, and the shape and size of the structure will not be changed, thereby ensuring the authenticity of the three-dimensional data file.
[0104] In one example, when the virtual jaw frame does not match the reference jaw position, the movement of the virtual jaw frame can be further analyzed to determine the abnormal position structure in the virtual jaw frame. Furthermore, when it is determined that there is an abnormal position structure, a position adjustment suggestion corresponding to the structure can be generated, which can help increase the difficulty of adjusting the virtual jaw frame, and also help improve the efficiency of adjusting the virtual jaw frame.
[0105] Step 404: when the virtual jaw frame matches each reference jaw position model, determine an updated three-dimensional data file based on the virtual jaw frame.
[0106] In the above technical scheme, whether to correct the virtual jaw frame and the method to adjust the virtual jaw frame can be determined based on the matching relationship between the virtual jaw frame and the reference jaw position of the target jaw joint position under at least two reference expressions, so as to adjust the virtual jaw frame. Finally, an updated three-dimensional data file is determined based on the virtual jaw frame that matches each reference jaw position model. This can help improve the accuracy of the updated three-dimensional data file, and further help improve the wearing effect of the designed full-mouth removable denture.
[0107] The present application also provides an electronic device. Fig.11 As shown, Fig.11The electronic device 500 shown includes: a processor 501 and a memory 503. The processor 501 and the memory 503 are connected, such as through a bus 502. Optionally, the electronic device 500 may also include a transceiver 504. It should be noted that in actual applications, the transceiver 504 is not limited to one, and the structure of the electronic device 500 does not constitute a limitation on the embodiments of the present application.
[0108] The processor 501 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. The processor 501 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.
[0109] The bus 502 may include a path to transmit information between the above components. The bus 502 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus. The bus 502 may be divided into an address bus, a data bus, etc. For ease of representation, Fig.11 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.
[0110] The memory 503 may be a ROM (Read Only Memory) or other types of static storage devices that can store static information and instructions, a RAM (Random Access Memory) or other types of dynamic storage devices that can store information and instructions, or an EEPROM (Electrically Erasable Programmable Read Only Memory), a disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.
[0111] The memory 503 is used to store the application code for executing the solution of the present application, and the execution is controlled by the processor 501. The processor 501 is used to execute the application code stored in the memory 503 to implement the contents shown in the above method embodiment.
[0112] The electronic devices include, but are not limited to, mobile terminals such as mobile phones, laptop computers, PDAs (personal digital assistants), PADs (tablet computers), etc., and fixed terminals such as digital TVs, desktop computers, etc. It can also be a server terminal, etc. Fig.11 The electronic device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.
[0113] The embodiment of the present application also provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed in a computer, the computer is caused to execute the digital full denture joint repositioning and repair method provided in the above embodiment.
[0114] It should be understood that although the steps in the flowchart of the accompanying drawings are shown in sequence according to the instructions of the arrows, these steps are not necessarily performed in the order indicated by the arrows. Unless otherwise clearly stated in this document, the execution of these steps is not strictly limited in order and can be performed in other orders.
[0115] The above are only some implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.
Claims
1. A digital complete denture joint repositioning and repair method, characterized in that: The method comprises: Obtaining a CT file acquired while an edentulous patient is wearing a centric occlusal tray secured in the patient's mouth by bite registration silicone; Acquire a face scan STL file acquired by performing a face scan on the patient, wherein the face scan STL file includes a first STL file acquired when the patient wears a centric occlusal tray, and a second STL file acquired when the patient does not wear the centric occlusal tray; Obtaining the occlusal STL file corresponding to the patient, wherein the occlusal STL file is obtained by combining the upper and lower jaw models corresponding to the patient with the occlusal recording silicone and scanning; the upper and lower jaw models are used to record the mucosal morphology of the upper and lower jaws of the patient; Generate a three-dimensional data file based on the model STL file corresponding to the upper and lower jaw models, the face scan STL file, the CT file and the occlusion STL file, wherein the three-dimensional data file includes the maxillofacial soft tissue morphology, the oral mucosal surface and the relative relationship between the upper and lower jaws; determining a target jaw joint position based on the three-dimensional data file; Updating the three-dimensional data file based on the target jaw joint position to obtain an updated three-dimensional data file; A complete denture design is performed based on the updated three-dimensional data file.
2. The method according to claim 1, characterized in that The design of full denture according to the updated three-dimensional data file includes: According to the updated three-dimensional data file, a trial denture with upper and lower anterior teeth is designed to obtain a trial denture STL file, and the trial denture is made according to the trial denture STL file, and the trial denture is worn in the patient's mouth to verify the correctness of the occlusal plane, determine the horizontal jaw plane and record the occlusal relationship, and at the same time make a final impression; Scanning the final impression and the occlusal relationship to obtain a final impression film STL file of the final impression recording the occlusal relationship; The complete denture design is performed according to the final print film STL file.
3. The method according to claim 2, characterized in that The complete denture comprises a base and a dentition, and the complete denture design according to the final print film STL file comprises: Generate a base STL file corresponding to the base based on the morphology of the mucosal surface and the mucosal turning point of the final impression recorded in the final impression film STL file, so as to generate a base based on the base STL file; A dentition STL file is generated based on the occlusal plane and the anterior teeth arrangement state and position recorded in the final print film STL file, and the dentition is generated based on the dentition STL file, and the dentition is fixed on the base to obtain the complete denture.
4. The method according to claim 1, characterized in that The upper and lower jaw models are plaster models obtained by taking molds of the upper and lower jaws of the patient using silicone rubber and casting them. Before generating a three-dimensional data file based on the model STL file corresponding to the upper and lower jaw models, the face scan STL file, the CT file and the occlusal STL file, the following is also included: The upper and lower jaw models are scanned to obtain the STL file of the model.
5. The method according to claim 4, characterized in that The scanning of the upper and lower jaw models to obtain the STL file of the model includes: Scanning the upper and lower jaw models to obtain an initial STL file; The initial STL file is modified based on the oral scan STL file corresponding to the patient to obtain the model STL file, where the oral scan STL file is obtained by performing an intraoral scan on the patient.
6. The method according to claim 1, characterized in that Determining the target jaw joint position based on the three-dimensional data file includes: Performing jaw joint recognition on the three-dimensional data file to obtain the original jaw joint position; The original jaw joint position is adjusted to obtain the target jaw joint position.
7. The method according to claim 1, characterized in that The updating of the three-dimensional data file based on the target jaw joint position to obtain an updated three-dimensional data file includes: The virtual jaw frame corresponding to the three-dimensional data file is adjusted based on the target jaw joint position to obtain the updated three-dimensional data file, so that the jaw joint position corresponding to the updated three-dimensional data file matches the target jaw joint position.
8. The method according to claim 7, characterized in that The step of adjusting the virtual jaw frame corresponding to the unit data file based on the target jaw joint position to obtain the updated three-dimensional data file includes: generating reference jaw position relationships under at least two reference expressions based on the target jaw joint position; For each of the reference jaw position relationships, determining whether the virtual jaw frame matches the reference jaw position relationship; In the case where the virtual jaw frame does not match the reference jaw position relationship, adjusting the virtual jaw frame based on the reference jaw position relationship so that the virtual jaw frame matches the reference jaw position relationship; When the virtual jaw frame matches each of the reference jaw position models, the updated three-dimensional data file is determined based on the virtual jaw frame.
9. An electronic device, characterized in that: The electronic device comprises: at least one processor; Memory; At least one application, wherein the at least one application is stored in a memory and configured to be executed by at least one processor, wherein the at least one application is configured to: execute the digital full denture joint repositioning repair method as described in any one of claims 1 to 8.
10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed in a computer, the computer is caused to execute the digital complete denture joint repositioning and repair method as described in any one of claims 1 to 8.