Digital complete denture manufacturing method based on surface scanning calibration occlusal plane and related equipment

Abstract

The invention relates to the technical field of dental restoration, in particular to a digital complete denture manufacturing method based on a surface scanning calibration occlusal plane and related equipment. The method comprises the following steps: performing three-dimensional reconstruction on a maxillofacial surface of a target object based on oral cavity scanning data and face scanning data to obtain a maxillofacial surface three-dimensional model; the maxillofacial three-dimensional model comprises a face three-dimensional area and an oral cavity three-dimensional area; determining a first occlusal plane in the oral three-dimensional area by taking the oral anatomical mark point as a reference; determining a face reference line according to the face three-dimensional area; and calibrating the first occlusal plane according to the facial reference line to obtain a second occlusal plane, and modeling an upper jaw denture and a lower jaw denture along the second occlusal plane. According to the method, the second occlusal plane can be obtained through automatic calibration of the face reference line, digital modeling of the upper jaw denture and the lower jaw denture is performed on the second occlusal plane, the occlusal plane does not depend on manual confirmation through a traditional occlusal support, and intraoral operation steps during denture repair are reduced.

Description

Technical Field

[0001] This application relates to the field of oral prosthetics technology, and in particular to a digital complete denture fabrication method and related equipment based on surface scanning to calibrate the occlusal plane. Background Technology

[0002] In the field of complete denture technology, edentulous patients undergoing complete denture restoration need to go through the following four treatment steps:

[0003] First visit: Using prefabricated trays and impression materials to obtain the edentulous jaw shape in order to fabricate maxillary and mandibular occlusal trays; Second visit: Using maxillary and mandibular occlusal brackets to determine the occlusal plane, vertical distance, and centric relation; Third visit: Based on the determined occlusal plane, vertical distance, and centric relation, the denture will be fabricated, and the patient will be allowed to try it on to collect adjustment data; Fourth visit: Delivery of adjusted and fabricated complete dentures.

[0004] For edentulous patients, determining and recording the horizontal jaw position during complete denture restoration is the most technically challenging and experience-dependent crucial step. In this process, determining the occlusal plane relies on the technician's experience and the patient's cooperation to assess the correctness of the current bite and adjust the jaw position.

[0005] The process of technicians recording a patient's jaw position using a dental occlusal tray is time-consuming and relatively cumbersome. Furthermore, the traditional occlusal tray method, due to its large size and space-consuming nature, can cause discomfort and involuntary mandibular movements in patients during the procedure, increasing the difficulty of cooperation and consequently affecting the accuracy of horizontal jaw position recording and the stability of the restorative outcome. Summary of the Invention

[0006] The main objective of this application is to propose a digital complete denture fabrication method and related equipment based on facial scanning calibration of the occlusal plane. This method can determine the occlusal plane in the jaw relationship through digital scanning data, and can complete the fabrication of maxillary and mandibular dentures after a second visit, without relying on maxillary and mandibular occlusal brackets, thereby reducing the number of visits for patients and improving their overall treatment experience.

[0007] To achieve the above objectives, one aspect of this application proposes a method for digital complete denture fabrication based on surface scanning calibration of the occlusal plane, the method comprising the following steps: Based on oral and facial scan data, a three-dimensional reconstruction of the maxillofacial region of the target object is performed to obtain a three-dimensional maxillofacial model; the three-dimensional maxillofacial model includes a three-dimensional facial region and a three-dimensional oral region. The first occlusal plane is determined in the three-dimensional region of the oral cavity using oral anatomical landmarks as references; Based on the facial reference lines determined by the three-dimensional facial region, the first occlusal plane is calibrated to obtain the second occlusal plane; In the three-dimensional region of the oral cavity, the maxillary prosthesis is modeled along one side of the second occlusal plane, and the mandibular prosthesis is modeled along the other side of the second occlusal plane.

[0008] In some embodiments, the oral anatomical landmarks include the retromolar pad, the maxillary tuberosity, and the midline of the alveolar ridge crest; the step of determining the first occlusal plane in the three-dimensional region of the oral cavity using oral anatomical landmarks as a reference specifically includes: Feature recognition is performed on the three-dimensional region of the oral cavity to obtain the coordinates of the molar pad, the coordinates of the maxillary tuberosity, and the distribution of the alveolar ridge midline; The first occlusal plane is obtained by performing planar fitting using the coordinates of the molar pad, the coordinates of the maxillary tuberosity, and the distribution of the alveolar ridge midline.

[0009] In some embodiments, the facial reference line includes the nasal ala-tragus line and the pupil line; the facial reference line is determined by the following steps: Extract the coordinates of the nasal wing point, pupil point, and tragus point from the three-dimensional facial region; The nasal alar-tragus line is determined based on the coordinates of the nasal alar point and the tragus point, and the pupil line is determined based on the coordinates of the pupil point.

[0010] In some embodiments, calibrating the first occlusal plane according to the facial reference line specifically includes: Determine whether the first included angle between the first occlusal plane and the nasolabial tragus line is greater than the first included angle threshold. If so, rotate the first occlusal plane to reduce the angle value of the first included angle. Determine whether the second included angle between the first occlusal plane and the line connecting the pupil is greater than a second included angle threshold. If so, rotate the first occlusal plane to decrease the angle value of the second included angle.

[0011] In some embodiments, the first included angle is determined by the following steps: Determine the normal to the occlusal plane based on the first occlusal plane; The first angle is determined by the angle between the occlusal plane normal and the nasal ala-tragus line.

[0012] In some embodiments, the second included angle is determined by the following steps: Determine the normal to the occlusal plane based on the first occlusal plane; The second angle is determined by the angle between the normal to the occlusal plane and the line connecting the pupils.

[0013] In some embodiments, prior to modeling the mandibular prosthesis along the other side of the second occlusal plane, the method further includes: Obtain the horizontal jaw position relationship recorded by the mandibular occlusal bracket and the vertical jaw position relationship recorded by the oral cavity scan data; The arrangement position of the mandibular denture is determined according to the horizontal jaw relationship, and the height of the mandibular denture is determined according to the vertical jaw relationship; The process of modeling the mandibular prosthesis along the other side of the second occlusal plane specifically includes: The mandibular prosthesis is modeled on the second occlusal plane according to its arrangement and height.

[0014] In some embodiments, after generating the three-dimensional model of the mandibular occlusal bracket, the method further includes: Obtain the horizontal jaw position and denture occlusion position recorded by the mandibular denture; A three-dimensional model of the mandibular prosthesis is generated based on the occlusal position and the horizontal jaw position. The three-dimensional model of the mandibular prosthesis is used to manufacture a physical mandibular prosthesis.

[0015] To achieve the above objectives, this application also provides a digital complete denture fabrication device, comprising: The oral cavity scanning module is used to collect oral cavity scanning data; The facial scanning module is used to collect facial scanning data; A data processing module is used to execute the steps of the method described in the embodiments of this application.

[0016] To achieve the above objectives, embodiments of this application also provide an electronic device, including: at least one processor; at least one memory for storing at least one program; and when the at least one program is executed by the at least one processor, causing the at least one processor to implement the steps of the method described in embodiments of this application.

[0017] The embodiments of this application include at least the following beneficial effects: This application provides a method and related equipment for digital complete denture fabrication based on facial scan calibration of the occlusal plane. This method reconstructs the maxillofacial region of a target object using oral and facial scan data to obtain a three-dimensional maxillofacial model. The three-dimensional maxillofacial model includes a facial three-dimensional region and an oral three-dimensional region. Using oral anatomical landmarks as references, a first occlusal plane is determined in the oral three-dimensional region. Based on the facial reference lines determined in the facial three-dimensional region, the first occlusal plane is calibrated to obtain a second occlusal plane. In the oral three-dimensional region, a maxillary denture is modeled along one side of the second occlusal plane, and a mandibular denture is modeled along the other side of the second occlusal plane. In this application embodiment, during a single treatment visit, an initial first occlusal plane is generated firstly using oral anatomical landmarks identified in the oral scan data. A stable geometric relationship exists between the facial reference lines and the occlusal plane during stable occlusion, and the facial reference lines from the facial scan data can serve as a reference standard for the occlusal plane. The first occlusal plane is obtained by calibration using this geometric relationship, and the second occlusal plane is determined after the first visit, and digital modeling of the maxillary and mandibular dentures is performed using it. Attached Figure Description

[0018] Figure 1 This is an optional flowchart of the digital complete denture fabrication method provided in the embodiments of this application; Figure 2 This is a flowchart illustrating step 102 of the method provided in this application embodiment; Figure 3 This is a flowchart illustrating the facial reference line determination steps of the method provided in the embodiments of this application; Figure 4 This is a flowchart illustrating step 104 of the method provided in the embodiments of this application; Figure 5 This is a flowchart illustrating step 101 of the method provided in this application embodiment; Figure 6 This is a three-dimensional structural diagram of the maxillary denture provided in the embodiments of this application; Figure 7 This is a three-dimensional structural diagram of the mandibular denture provided in the embodiments of this application; Figure 8 This is a logical structure diagram of the digital complete denture fabrication device provided in the embodiments of this application. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit it. In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with those of this application; they are merely examples of apparatuses and methods consistent with some aspects of the embodiments of this application as detailed in the appended claims.

[0020] It is understood that the terms “first,” “second,” etc., used in this application may be used herein to describe various concepts, but unless otherwise stated, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another. For example, without departing from the scope of the embodiments of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the words “if,” “when,” or “in response to a determination” as used herein may be interpreted as “when…” or “when…” or “in response to a determination.”

[0021] As used in this application, the terms "at least one", "multiple", "each", "any", etc., "at least one" includes one, two or more, "multiple" includes two or more, "each" refers to each of the corresponding multiples, and "any" refers to any one of the multiples.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0023] In related technologies, edentulous patients undergoing complete denture restoration need to go through the following four treatment steps: First visit: Using prefabricated trays and impression materials to obtain the edentulous jaw shape in order to fabricate maxillary and mandibular occlusal trays; Second visit: Using maxillary and mandibular occlusal brackets to determine the occlusal plane, vertical distance, and centric relation; Third visit: Based on the determined occlusal plane, vertical distance, and centric relation, the denture will be fabricated, and the patient will be allowed to try it on to collect adjustment data; Fourth visit: Delivery of adjusted and fabricated complete dentures.

[0024] Existing digital complete denture methods cannot significantly reduce the number of patient visits. Although digital modeling and 3D printing of complete dentures can be achieved, the determination of vertical distance and jaw position records still relies entirely on occlusal braces.

[0025] For edentulous patients, determining and recording the horizontal jaw relationship during complete denture restoration is the most technically challenging and experience-dependent crucial step. Determining the occlusal plane is typically the most time-consuming and involves relatively complex intraoral procedures. Furthermore, traditional occlusal receptacle methods, due to their large receptacle size and the space they occupy in the oral cavity, can cause discomfort and involuntary mandibular movements in patients during the procedure, increasing the difficulty of patient cooperation and consequently affecting the accuracy of the horizontal jaw relationship recording and the stability of the restoration outcome.

[0026] In view of this, this application provides a digital complete denture fabrication method and related equipment based on facial scanning calibration of the occlusal plane. By determining the occlusal plane in the jaw position relationship through digital scanning data, the maxillary and mandibular dentures can be fabricated after a second visit, without relying on maxillary and mandibular occlusal brackets, reducing the number of visits for patients and improving the overall treatment experience for patients.

[0027] This application can be used in a wide variety of general-purpose or special-purpose computer system environments or configurations. Examples include: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable consumer electronics devices, network PCs, minicomputers, mainframe computers, and distributed computing environments including any of the above systems or devices. This application can be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc., that perform specific tasks or implement specific abstract data types. This application can also be practiced in distributed computing environments where tasks are performed by remote processing devices connected via a communication network. In distributed computing environments, program modules can reside in local and remote computer storage media, including storage devices.

[0028] It should be noted that in all specific embodiments of this application, when processing data related to user identity or characteristics, such as user information, user behavior data, user historical data, and user location information, user permission or consent is obtained first. Furthermore, the collection, use, and processing of this data comply with relevant laws, regulations, and standards. In addition, when embodiments of this application require access to sensitive personal information of users, separate permission or consent from the user is obtained through pop-ups or redirection to confirmation pages. Only after obtaining the user's separate permission or consent is the necessary user-related data required for the proper functioning of these embodiments acquired.

[0029] Figure 1This is an optional flowchart of the digital complete denture fabrication method provided in the embodiments of this application.

[0030] See Figure 1 , Figure 1 The method may include, but is not limited to, steps 101 to 106: 101. Based on oral and facial scan data, the maxillofacial region of the target object is reconstructed in three dimensions to obtain a three-dimensional maxillofacial model; the three-dimensional maxillofacial model includes a three-dimensional facial region and a three-dimensional oral region; 102. Using oral anatomical landmarks as references, determine the first occlusal plane in the three-dimensional region of the oral cavity; 103. Based on the facial reference lines determined by the three-dimensional facial region, the first occlusal plane is calibrated to obtain the second occlusal plane; 104. In the three-dimensional region of the oral cavity, model the maxillary denture along one side of the second occlusal plane and model the mandibular denture along the other side of the second occlusal plane.

[0031] In this embodiment, an initial first occlusal plane is generated during a single dental visit using anatomical landmarks identified in oral scan data. A stable geometric relationship exists between the facial reference line and the occlusal plane during stable occlusion, and the facial reference line from the facial scan data can serve as a reference standard for the occlusal plane. The first occlusal plane is obtained through calibration using this geometric relationship, thereby determining the second occlusal plane after the first visit, and using it for digital modeling of the maxillary and mandibular dentures. This application reduces the number of dental visits for complete denture restoration from four to three, eliminating the step of recording jaw position relationships using upper and lower occlusal brackets in the complete denture restoration process, greatly improving the patient's experience.

[0032] In some embodiments, the oral anatomical landmarks include the retromolar pad, the maxillary tuberosity, and the midline of the alveolar ridge crest.

[0033] Figure 2 This is a flowchart illustrating step 102 of the method provided in the embodiments of this application.

[0034] See Figure 2 Step 102 includes, but is not limited to: 201. Perform feature recognition on the three-dimensional region of the oral cavity to obtain the coordinates of the molar pad, the coordinates of the maxillary tuberosity, and the distribution of the alveolar ridge midline; 202. The first occlusal plane is obtained by performing plane fitting using the coordinates of the molar pad, the coordinates of the maxillary tubercle, and the distribution of the alveolar ridge midline.

[0035] It is understood that in step 201, the coordinates of the retromolar pad represent the position of the retromolar pad in the three-dimensional region of the oral cavity, the coordinates of the maxillary tubercle represent the position of the maxillary tubercle in the three-dimensional region of the oral cavity, and the alveolar crest midline represents the curve distribution of the midlines of the maxillary and mandibular alveolar crests in the three-dimensional region of the oral cavity.

[0036] In this embodiment, oral and facial scan data are imported into digital design software. Through feature point matching, surface registration, or a combination thereof, the oral scan model and facial scan data are fused in three-dimensional space. Based on the average value method, combined with the patient's residual alveolar ridge morphology, the position of the molar pad, and traditional denture design principles, an initial occlusal plane is established in the digital model.

[0037] It is understood that the oral cavity scan data refers to three-dimensional data of the edentulous mucosa of the upper and lower jaws acquired using an intraoral scanner. The facial scan data refers to three-dimensional facial data of the target object acquired using a facial scanner. The three-dimensional data includes point cloud data.

[0038] Figure 3 This is a flowchart illustrating the steps for determining facial reference lines in the method provided in this application embodiment.

[0039] In some embodiments, the facial reference line includes the nasal ala-tragus line and the pupil line.

[0040] See Figure 3 The facial reference line in step 103 is determined through the following steps: 301. Extract the coordinates of the nasal ala point, pupil point, and tragus point from the three-dimensional facial region; 302. Determine the nasal ala-tragus line based on the coordinates of the nasal ala point and the coordinates of the tragus point, and determine the pupil line based on the coordinates of the pupil point.

[0041] In this embodiment, the pupil point coordinates include both pupils, and the pupil line is an imaginary line formed by the coordinates of the two pupils. The nasal alar point coordinates are the imaginary point coordinates of the lower edge of one nasal alar and the imaginary point coordinates of the upper edge of the tragus on the same side. The nasal alar-tragus line is an imaginary straight line connecting the lower edge of one nasal alar to the upper edge of the tragus on the same side.

[0042] In clinical terms, when the natural dentition is present and the occlusal plane is in a natural occlusal state, the posterior part of the occlusal plane is parallel to the nasal ala-tragus line, and the anterior part of the occlusal plane is parallel to the line connecting the pupils.

[0043] Figure 4 This is a flowchart illustrating step 103 of the method provided in the embodiments of this application.

[0044] In some embodiments, step 103 includes, but is not limited to: 401. Determine whether the first included angle between the first occlusal plane and the nasal ala-tragus line is greater than the first included angle threshold. If so, rotate the first occlusal plane to reduce the angle value of the first included angle. 402. Determine whether the second included angle between the first occlusal plane and the line connecting the pupil is greater than the second included angle threshold. If so, rotate the first occlusal plane to decrease the angle value of the second included angle.

[0045] In this embodiment, step 103 transforms the determination of the occlusal plane from traditional intraoral experience-based judgment to an objective, visual, and repeatable digital operation, thereby reducing the steps involved in determining the occlusal plane through a dental tray.

[0046] In some specific embodiments, the first included angle is the angle formed by the normal of the occlusal plane and the nasal alar-tragus line, and the second included angle is the angle formed by the normal of the occlusal plane and the line connecting the pupil.

[0047] Specifically, the first included angle and the second included angle are determined through the following steps: Determine the normal to the occlusal plane based on the first occlusal plane; The first angle is determined by the angle between the occlusal plane normal and the nasal ala-tragus line.

[0048] Determine the normal to the occlusal plane based on the first occlusal plane; The second angle is determined by the angle between the normal to the occlusal plane and the line connecting the pupils.

[0049] Figure 5 This is a flowchart illustrating step 101 of the method provided in the embodiments of this application.

[0050] See Figure 5 Step 101 includes, but is not limited to: 501. Acquire the oral cavity scan data and the facial scan data; 502. Generate a three-dimensional model of the oral cavity region based on the oral cavity scan data, and generate a three-dimensional model of the facial region based on the facial scan data; 503. Convert the three-dimensional model of the oral cavity region and the three-dimensional model of the facial region to the same reference coordinate system, and register the three-dimensional model of the oral cavity region and the three-dimensional model of the facial region to obtain the three-dimensional model of the maxillofacial region.

[0051] In some embodiments, prior to modeling the mandibular prosthesis along the other side of the second occlusal plane, the method further includes: 601. Obtain the horizontal jaw position relationship recorded by the mandibular occlusal bracket and the vertical jaw position relationship recorded by the oral cavity scan data; 602. Determine the arrangement position of the mandibular denture according to the horizontal jaw relationship, and determine the height of the mandibular denture according to the vertical jaw relationship.

[0052] In this embodiment, the horizontal jaw position relationship is determined by the mandibular occlusal bracket. The height of the base and the height of the wax rim of the mandibular occlusal bracket are determined by the vertical distance of the jaw and face determined by the oral cavity scanning data. The mandibular occlusal bracket is then fabricated based on the height of the base and the height of the wax rim.

[0053] During the second visit, the patient wore the maxillary denture and the mandibular occlusal bracket and engaged in occlusion. The maxillary denture left an occlusal mark on the wax rim of the mandibular occlusal bracket. This occlusal mark reflects the horizontal jaw relationship of the mandibular denture.

[0054] In this embodiment, a combination of "maxillary denture + mandibular occlusal bracket" is used to record and retain jaw position. This provides superior stability compared to traditional occlusal brackets and improves the accuracy of vertical distance and horizontal jaw position recording. This embodiment reduces the number of rework adjustments required for the maxillary denture, improves denture stability, aesthetics, and chewing function, and reduces the rework rate.

[0055] The vertical jaw relationship of the target object has been recorded in the oral cavity scan data. The height of the mandibular denture can be determined through the vertical jaw relationship, and the arrangement position of the mandibular denture can be determined based on the horizontal jaw relationship recorded by the mandibular occlusal bracket. In this embodiment, modeling the mandibular denture along the other side of the second occlusal plane specifically includes: modeling the mandibular denture on the second occlusal plane according to the arrangement position and height of the mandibular denture.

[0056] The following section provides a detailed introduction and explanation of the solutions in this embodiment of the invention, using specific scenarios of complete denture restoration as examples: The steps of the complete denture restoration method in this application embodiment include AH.

[0057] Step A: Data Acquisition.

[0058] A1. 3D Oral Scan: An intraoral scanner is used to obtain a 3D model of the patient's edentulous maxilla and mandible. The scanning area includes functional areas such as the vestibule, retromolar pad, and maxillary tuberosity to ensure the accuracy of subsequent denture margin design.

[0059] A2. Initial Vertical Distance Recording: The patient's initial vertical distance is recorded using a centric occlusal tray. At this stage, occlusal plane determination is not performed; only the vertical distance parameters are obtained.

[0060] A3. Facial 3D Scan: Collect facial scan data of the patient in a frontal, slightly closed-mouth posture, including facial landmarks such as the line connecting the nasal alae, the line connecting the pupils, the zygomatic arch, and the lip line, for use in occlusal plane calibration and aesthetic evaluation.

[0061] A4. Import the intraoral scan data, vertical distance data, and surface scan data into the digital design software platform.

[0062] Step B: Digital Model Fusion B1. Import the oral scan model and the surface scan model into digital software with registration function for modeling.

[0063] B2. By using feature point matching, surface point cloud registration, or manual-assisted registration, oral and facial scan data are fused in three-dimensional space to obtain a three-dimensional model of the maxillofacial region.

[0064] B3. The fused model forms a unified coordinate system, providing a spatial basis for occlusal plane calibration and denture design.

[0065] Step C: Establishment of the first occlusal plane, including: C1. Using anatomical structures such as the retromolar pad, maxillary tuberosity, and midline of the alveolar ridge crest of the mandible and maxilla as references, C2. Establish preliminary occlusal plane coordinates in digital software.

[0066] Step D: Based on the surface scan data, calibrate the first occlusal plane to obtain the second occlusal plane, including: D1. Extract reference lines such as the alar point, pupil point, and midline from the facial scan data; D2. Calculate the tilt angle between the first occlusal plane and the line connecting the nasal ala-tragus and the pupil. D3. If the tilt deviation exceeds the set threshold (e.g., 1° to 3°), the initial occlusal plane is corrected by rotation, translation, or height adjustment; D4. Obtain a personalized second occlusal plane that conforms to the patient's facial profile.

[0067] Step D transforms the determination of the occlusal plane from traditional intraoral experience-based judgment into an objective, visual, and repeatable digital operation.

[0068] Step E: Design and fabrication of the maxillary diagnostic denture, used for aesthetic assessment and jaw position guidance during the second visit, including: E1. Using the second occlusal plane as a reference, arrange the maxillary artificial teeth; E2. Generate a three-dimensional maxillary diagnostic denture model; E3. Fabricate a solid maxillary diagnostic denture using 3D printing equipment or CNC cutting equipment.

[0069] Step F: Design and fabrication of mandibular occlusal brackets. The mandibular occlusal brackets are used to record the horizontal jaw position relationship during the second visit.

[0070] F1. Design the height of the base and wax rim of the mandibular occlusal splint based on the initial vertical distance recorded in the first oral scan; F2. The base is made by 3D printing or cutting, and a wax rim is made on it to obtain the mandibular occlusal bracket.

[0071] Step G. Diagnostic denture trial fitting and jaw position relationship recording. The diagnostic denture is the maxillary denture before finalization.

[0072] In this step, an anterior aesthetic assessment of the diagnostic denture is performed: tooth exposure, smile line, lip support, etc.; vertical distance verification: the vertical distance of the jaw and face is optimized based on the position of the diagnostic denture; horizontal jaw position recording: the mandibular position is recorded by using a mandibular occlusal bracket to record the stable closed mouth of the patient while wearing the diagnostic denture; and adjustment data of the diagnostic denture and occlusal bracket are recorded for technical correction. This method is more stable than traditional bimaxillary occlusal bracket recording, easier for patients to cooperate, and has higher compliance.

[0073] Step H. Design and fabrication of complete dentures.

[0074] In this step, the technician corrects the alignment of the upper and lower mandibular artificial teeth based on the final jaw relationship recorded in the second visit record, completing the process as follows: Figure 6 The maxillary denture occlusion shown is as follows Figure 7 The digital model of the mandibular prosthesis is shown. Finally, the maxillary and mandibular prostheses are fabricated using 3D printing or cutting equipment and delivered to the patient at the third visit.

[0075] This application optimizes the traditional four-visit process into three through the steps shown above, improving efficiency and reducing the burden on patients.

[0076] Figure 8 A logical structure diagram of the digital complete denture fabrication device provided in the embodiments of this application.

[0077] Please see Figure 8 This application also provides a digital complete denture fabrication device, comprising: The oral cavity scanning module is used to collect oral cavity scanning data; The facial scanning module is used to collect facial scanning data; A data processing module is used to execute the steps of the method described in the embodiments of this application.

[0078] It is understood that the content of the above method embodiments is applicable to the present device embodiments. The specific functions implemented by the present device embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0079] This application also provides an electronic device, which includes: at least one processor; at least one memory for storing at least one program; and when the at least one program is executed by the at least one processor, the at least one processor implements the steps of the method described in this application.

[0080] It is understood that the content of the above method embodiments is applicable to this device embodiment. The specific functions implemented by this device embodiment are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0081] The embodiments described in this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0082] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of this application, and may include more or fewer steps than shown, or combine certain steps, or different steps.

[0083] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0084] Those skilled in the art will understand that all or some of the steps in the methods disclosed above, as well as the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, or suitable combinations thereof.

[0085] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0086] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0087] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0088] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0089] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0090] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes multiple instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing programs, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0091] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.

Claims

1. A digital complete denture fabrication method based on surface scanning calibration of the occlusal plane, characterized in that, The method includes the following steps: Based on oral and facial scan data, a three-dimensional reconstruction of the maxillofacial region of the target object is performed to obtain a three-dimensional maxillofacial model; the three-dimensional maxillofacial model includes a three-dimensional facial region and a three-dimensional oral region. The first occlusal plane is determined in the three-dimensional region of the oral cavity using oral anatomical landmarks as references; Based on the facial reference lines determined by the three-dimensional facial region, the first occlusal plane is calibrated to obtain the second occlusal plane; In the three-dimensional region of the oral cavity, the maxillary prosthesis is modeled along one side of the second occlusal plane, and the mandibular prosthesis is modeled along the other side of the second occlusal plane.

2. The method according to claim 1, characterized in that, The oral anatomical landmarks include the retromolar pad, maxillary tubercle, and alveolar ridge midline; The method of determining the first occlusal plane in the three-dimensional region of the oral cavity using oral anatomical landmarks as references specifically includes: Feature recognition is performed on the three-dimensional region of the oral cavity to obtain the coordinates of the molar pad, the coordinates of the maxillary tuberosity, and the distribution of the alveolar ridge midline; The first occlusal plane is obtained by performing planar fitting using the coordinates of the molar pad, the coordinates of the maxillary tuberosity, and the distribution of the alveolar ridge midline.

3. The method according to claim 1, characterized in that, The facial reference lines include the nasal ala-tragus line and the pupil line; The facial reference lines are determined through the following steps: Extract the coordinates of the nasal wing point, pupil point, and tragus point from the three-dimensional facial region; The nasal alar-tragus line is determined based on the coordinates of the nasal alar point and the tragus point, and the pupil line is determined based on the coordinates of the pupil point.

4. The method according to claim 3, characterized in that, The calibration of the first occlusal plane based on the facial reference line specifically includes: Determine whether the first included angle between the first occlusal plane and the nasolabial tragus line is greater than the first included angle threshold. If so, rotate the first occlusal plane to reduce the angle value of the first included angle. Determine whether the second included angle between the first occlusal plane and the line connecting the pupil is greater than a second included angle threshold. If so, rotate the first occlusal plane to decrease the angle value of the second included angle.

5. The method according to claim 4, characterized in that, The first included angle is determined by the following steps: Determine the normal to the occlusal plane based on the first occlusal plane; The first angle is determined by the angle between the occlusal plane normal and the nasal ala-tragus line.

6. The method according to claim 4, characterized in that, The second included angle is determined by the following steps: Determine the normal to the occlusal plane based on the first occlusal plane; The second angle is determined by the angle between the normal to the occlusal plane and the line connecting the pupils.

7. The method according to claim 1, characterized in that, The three-dimensional reconstruction of the maxillofacial region of the target object based on oral and facial scan data specifically includes: Acquire the oral cavity scan data and the facial scan data; A three-dimensional model of the oral cavity region is generated based on the oral cavity scan data, and a three-dimensional model of the facial region is generated based on the facial scan data. The three-dimensional models of the oral cavity region and the facial region are converted to the same reference coordinate system, and the three-dimensional models of the oral cavity region and the facial region are registered to obtain the three-dimensional model of the maxillofacial region.

8. The method according to claim 1, characterized in that, Before modeling the mandibular prosthesis along the other side of the second occlusal plane, the following is also included: Obtain the horizontal jaw position relationship recorded by the mandibular occlusal bracket and the vertical jaw position relationship recorded by the oral cavity scan data; The arrangement position of the mandibular denture is determined according to the horizontal jaw relationship, and the height of the mandibular denture is determined according to the vertical jaw relationship; The process of modeling the mandibular prosthesis along the other side of the second occlusal plane specifically includes: The mandibular prosthesis is modeled on the second occlusal plane according to its arrangement and height.

9. A digital complete denture fabrication device, characterized in that, include: The oral cavity scanning module is used to collect oral cavity scanning data; The facial scanning module is used to collect facial scanning data; A data processing module for performing the steps of the method according to any one of claims 1 to 8.

10. An electronic device, characterized in that, include: At least one processor; At least one memory for storing at least one program; when the at least one program is executed by the at least one processor, the at least one processor performs the steps of the method as claimed in any one of claims 1 to 8.

Images