Modeling method for multiple consecutive missing or / and edentulous implants

Abstract

The present invention provides a method for modeling multiple consecutive missing or / and edentulous implants. The method belongs to the field of medical digital technology. For edentulous jaw implants including implant-level restoration cases of multiple implants, a special converter system is first proposed, including a converter. Based on the principle of combining visual measurement technology and structured light scanning technology, it can establish models of multiple dental implants at one time, thereby providing a data basis for subsequent restoration, shortening the patient's consultation time, and improving the patient's comfort. The implant modeling method greatly improves the modeling accuracy through initial modeling and model correction, providing an accurate data basis for subsequent data restoration.

Description

Technical Field

[0001] The present invention relates to the field of medical digital technology, and in particular to a method for modeling multiple consecutively missing or / and edentulous jaw implants. Background Art

[0002] Dental implant refers to a method of restoring missing teeth based on the lower structure implanted in the bone tissue to support and retain the upper dental restoration. There are currently three mainstream implant restoration modeling methods:

[0003] The first is the traditional tray silicone rubber impression, which requires the transfer rod to be installed in the patient's mouth and then the tray silicone rubber is used to make an impression in the patient's mouth. The patient will feel very uncomfortable and have a strong pharyngeal reflex and vomiting.

[0004] The second method is to use intraoral scanning technology based on the principle of structured light scanning to complete the digital impression through an intraoral scanning scanning rod. Intraoral scanning is formed by superimposing photos based on the principle of structured light photography. The superposition cumulative error is large and the accuracy is relatively low, so it can only meet the needs of single implant restoration and within three implants.

[0005] The third approach involves extraoral scanning based on visual measurement (also known as photogrammetry). However, due to factors such as limited occlusal space and economic considerations, many clinical cases do not utilize composite abutments, but instead proceed directly to the implant level. This approach typically involves intraoral scanning with a scanbore followed by a customized abutment. However, this approach often encounters issues with occlusal accuracy and crown proximity during the CAD / CAM process at the denture fabrication facility, stemming from the limitations of intraoral scanning accuracy.

[0006] Since the interface sizes of implants of different brands are not uniform, and the interface sizes of different models of implants of the same brand are also not uniform, it is impossible to use a universal visual measurement scanning rod of one size for the implant level. Instead, visual measurement scanning rods can only be manufactured one-to-one. Such a large number of brands and models brings manufacturing difficulties and high costs, making it impossible to achieve economical application.

[0007] Therefore, the market urgently needs to develop a systematic solution that can not only apply the high-precision extraoral scanning technology of visual measurement technology, but also economically implement an optical scanning solution at the implant level for such cases. While meeting the accuracy requirements, it is more comfortable and saves time than traditional impression taking methods. Summary of the Invention

[0008] In view of the above-mentioned defects of the prior art, the present invention provides a method for modeling multiple consecutive missing or / and edentulous jaw implants, comprising the following steps:

[0009] S1: Calibration file creation: A test model is constructed using a substitute, a converter (1) and a scanning rod, and a calibration file B is obtained through scanning and calibration comparison processing;

[0010] S2: Installing the scanning rod: installing the converter (1) and the corresponding scanning rod in the implant of the patient's oral cavity in sequence; using a visual measurement device or a structured light scanning device to measure and obtain visual data of the patient's oral cavity;

[0011] S3: Acquire oral scan data, install the scanning cap, install the visual measurement scanning cap, and use the oral scanning device to scan and acquire the gum and opposing tooth data of the scanning cap; optionally, before step S3, it also includes disassembling the scanning rod: disassembling the visual measurement scanning rod or the structured light scanning rod;

[0012] S4: Preliminary model establishment: Obtain the jaw data by transferring the occlusion, and build a preliminary three-dimensional model based on the acquired visual data;

[0013] S5: Model calibration: calibrate the preliminary 3D model using calibration file B to obtain the final 3D model;

[0014] Furthermore, after the model is calibrated, the scanning cap is disassembled and recycled; and the appropriate restoration method and restoration are selected through the final three-dimensional model to create a digital restoration file for the user.

[0015] Beneficial effects of the present invention:

[0016] 1. Ability to build models of multiple dental implants at one time, thus providing a data basis for subsequent restoration, shortening the patient's consultation time and improving the patient's comfort;

[0017] 3. The implant modeling method greatly improves the modeling accuracy through initial modeling and model correction, providing an accurate data basis for subsequent data restoration;

[0018] 4. A set of visual measurement scanning rods can scan multiple planting systems, greatly reducing the difficulty and cost;

[0019] 5. Realize the transition from fully digital data collection to fully digital data processing. Full digitalization brings data accuracy and traceability of the entire process, while achieving clinical aseptic and standardized operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a structural diagram of the converter of the present invention;

[0021] Figure 2is an intermediate state of the compensation file of the present invention; wherein, (1) is a substitute, (2) is a substitute installed with a converter, (3) is a substitute installed with a converter and a scanning rod, (4) is the scanning data of the scanning rod, (5) is the preliminary spatial model data of the scanning rod, (6) is the scanning data after calibration of the scanning rod, and (7) is the final spatial model data after calibration;

[0022] Figure 3 This is a visual diagram of the scanning cap of the present invention;

[0023] Figure 4 Schematic diagram of the three-dimensional model of the present invention, wherein (1) is a schematic diagram of the preliminary three-dimensional model, and (2) is a schematic diagram of the final three-dimensional model.

[0024] In the figure, 1 is a converter, 11 is a scanning rod connector, 12 is a bearing platform, and 13 is an implant connector. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention and to make the above-mentioned features, purposes and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with examples. The examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0026] The present invention provides a method for modeling multiple consecutive missing or / and edentulous jaw implants, comprising:

[0027] S1: Calibration file creation: A test model is constructed using a substitute, a converter (1) and a scanning rod, and a calibration file B is obtained through scanning and calibration comparison processing;

[0028] The converter is shown in the attached Figure 1 Structural diagram, where 1 is the converter, 11 is the scanning rod connector, 12 is the carrier, and 13 is the implant connector;

[0029] The converter 1 is divided into a scanning rod connector 11, a bearing platform 12 and an implant connector 13 from top to bottom. The upper positioning surface of the bearing platform 12 is parallel to the lower positioning surface, with a distance of X mm, X∈[2,5], and an error of ±0.005 mm.

[0030] The upper positioning surface of the support platform 12 is used to calibrate the scanbar connector 11, and the lower positioning surface is used to align with the implant connector 13. Due to the limited space in the patient's mouth, the support platform 12 takes up additional space, so the thickness X of the support platform 12 can only be 2-5mm. To ensure subsequent accuracy, the error of the physical component must be kept within 0.005mm.

[0031] In this embodiment, X is 2.300, that is, the thickness of the supporting platform 12 is 2.300 mm.

[0032] S2: Installing a scanning rod, sequentially installing a converter (1) and a corresponding scanning rod in an implant in the patient's oral cavity; using a visual measurement device or a structured light scanning device to measure and obtain visual data of the patient's oral cavity;

[0033] The converter 1 and the corresponding scanning rod are installed in sequence on the implant in the patient's mouth. The scanning rod can be a visual measurement scanning rod or a structured light scanning rod. Preferably, the torque required to install the converter 1 and the scanning rod in the scanning rod is 10-15N. The converter needs to be manually screwed onto the implant using a torque wrench. If the force is too strong, the distance will be reduced to 15N. Because the torque will affect the height, too little force will cause loosening. Therefore, each converter needs to be installed on the implant with the same torque of 15N. After installation, a panoramic film (full jaw curved tomography) is required to confirm whether the converter is installed in place. If it is not in place, check whether it is interference from the alveolar bone or gums. After taking appropriate measures according to the actual situation, take another panoramic film to confirm until it is fully in place.

[0034] Data measurement: Use a visual measurement device or structured light scanning device to measure and obtain visual data of the patient's oral cavity. Taking the visual measurement device as an example, the patient needs to be in an upright position with the corners of their mouth open. The visual measurement device light and the visual measurement scanning rod should be kept as perpendicular as possible, and move from the right side of the patient to the left side. The movement process should be kept as stable as possible without large jitters. It is sufficient to scan both sides of the scanning rod to meet the requirements. Structured light scanning devices, such as intraoral scanners, can also be used. The visual measurement file obtains the relevant data of the scanning rod, which is not detailed here.

[0035] S3: Obtain oral scan data, install the scanning cap, perform visual measurement, install the scanning cap, use the oral scan device to scan and obtain the gum and jaw tooth data of the scanning cap, see the attached Figure 3 Scan cap visual schematic diagram; Optionally, before step S3, it also includes disassembling the scanning rod: visual measurement scanning rod or structured light scanning rod disassembly;

[0036] Visual measurement scan cap installation; manual installation can use a torque wrench, and use a probe to check if there is any gap in the contact area to determine whether it is installed in place. After installation, use oral scanning technology to directly scan the gums and opposing teeth with the scanning cap; the scan includes the complete gum part. The maxillary scan requires the alveolar ridge, labial and buccal mucosa, the entire hard palate to the maxillary tuberosity from the palatal fossa; the mandibular scan requires the alveolar ridge, labial and buccal mucosa, retromolar pad, and opposing jaw; each tooth in the opposing jaw must be scanned completely without defects;

[0037] S4: Preliminary model establishment: Obtain the jaw data by transferring the occlusion, and build a preliminary three-dimensional model based on the acquired visual data;

[0038] The preliminary three-dimensional model is as follows Figure 4As shown in (1), if there are multiple implants, digital numbers need to be set; the initial three-dimensional model is constructed by obtaining the jaw data through transfer occlusion and combining it with visual data, which specifically includes:

[0039] In this embodiment, the occlusion transfer is performed by directly scanning the patient's occlusion using an oral scan.

[0040] The mouth scan data is matched with the occlusal data. The occlusal data is divided into the maxillary and mandibular parts, which need to be matched with the mouth scan data in sequence. During the matching process, the positions of the upper and lower jaws in the occlusal data are matched with the model points of the upper and lower jaws in the mouth scan data. After the positioning is completed through multi-point data matching, the redundant model points in the mouth scan data are corrected. After the occlusal data of the maxillary and mandibular parts are merged with the mouth scan data into a model file, the upper and lower jaw model files with occlusion are obtained. The visual measurement file is then matched with the upper and lower jaw model files with occlusion.

[0041] In the occlusal data, partial model data of the scanning aid (the model exposed on the outer segment) appears at the relevant position of the missing tooth; after importing the visual measurement file, the scanning rod appears at a distance of 2.300 mm from the implant model, thus obtaining a preliminary 3D model.

[0042] Preferably, the occlusion transfer method in model building can adopt one or more of the following three methods: (1) traditional wax or wax rim biting; (2) oral scanning to directly scan the patient's occlusion; (3) using CBCT.

[0043] S5: Model calibration: calibrate the preliminary 3D model using calibration file B to obtain the final 3D model;

[0044] The preliminary 3D model is calibrated using calibration file B to obtain the final 3D model. The final 3D model is as follows: Figure 4 As shown in (2), the calibration file B calibrates the preliminary 3D model as follows:

[0045] The scanbar in the preliminary 3D model will be corrected by the data in calibration file B, and will move a certain distance from the top end to the tail end of the scanbar along its own tilt angle as compensation. At the same time, the original scanbar data will be deleted. In this implementation, 2.300 mm is used.

[0046] After compensation is completed, the corrected scanbody data is used to perform a secondary correction on the implant model data in the preliminary 3D model. Error data (including angles, etc.) are then recalibrated based on the visual measurement file. Finally, the relevant model data for the final 3D model is obtained.

[0047] When further calibration is performed, if there are multiple implants, it is necessary to set a digital number for each implant.

[0048] Furthermore, after the model is calibrated, the scanning cap is disassembled and recycled; and the appropriate restoration method and restoration are selected through the final three-dimensional model to create a digital restoration file for the user.

[0049] Preferably, the restoration method is determined, and the restoration method includes screw-retained one-stage restoration, non-rotational personalized abutment or titanium base bonded with zirconia.

[0050] In one embodiment, the specific establishment method in the above-mentioned S1: establishing the compensation file B is as follows:

[0051] Step 1: Install the test model: Assemble and debug the substitute, converter 1 and scanning rod in sequence to form a test model. The installation order is: Figure 2 (1), (2) and (3) in the figure, the final model structure after installation is Figure 2 Figure (3) in the figure;

[0052] Step 2: Obtain preliminary spatial data: Capture the spatial data a of the scanning rod by 3D scanning. The scanning rod captured after 3D scanning is Figure 2 As shown in (4), the corresponding spatial data model is Figure 2 As shown in (5);

[0053] Step 3: Get real space data: In EXOcad, the coordinates obtained from the space data are moved down by the height of the converter 1 by X mm to get the real space data A. In this implementation, X is 2.300, that is, the converter 1 is moved down by 2.300 mm. After the movement, the converter 1 is Figure 2 As shown in (6), the corresponding real spatial data A is as follows Figure 2 As shown in (7);

[0054] Step 4: Create a calibration file: Import the data transformation process between a and A into the vision measurement software as calibration file B1. Note that the data transformation process is not simply subtracting 2.300 mm from the vertical coordinate, but rather corrects the data for multiple positioning points of the scanning rod, that is, the overall data changes along a certain direction. For example, when tilted, the movement is along the tilt angle rather than simply sinking.

[0055] Step 5: Test: Test the reliability of the calibration file. If it passes, it will be used as the subsequent calibration file B. If it fails, repeat Step 1. Calibration File B can be used as the calibration file for all subsequent dental implants, not just a single implant.

[0056] The above embodiments are merely illustrative of the principles and effects of this patent application and are not intended to limit this patent application. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of this patent application. Therefore, all equivalent modifications or alterations made by persons of ordinary skill in the art without departing from the spirit and technical concepts disclosed in this patent application shall be covered by the claims of this patent application.

Claims

1. A method for modeling multiple consecutive missing or / and edentulous implants, characterized in that: The steps include: S1: Calibration file creation: A test model is constructed using a substitute, a converter (1) and a scanning rod, and calibration file B is obtained through scanning and calibration comparison processing; The specific process includes the following five steps: Step 1: Install the test model: Assemble and debug the substitute body, converter, and scanning rod in sequence to form a test model; Step 2: Obtain preliminary spatial data: Capture the spatial data of the scanning rod a by three-dimensional scanning; Step 3: Obtain real space data: In EXOcad, the coordinates obtained from the space data are shifted downward by the height difference X mm caused by the converter to obtain the real space data A. Step 4: Build the calibration file: Bring the data transformation process between a and A into the visual measurement software as the calibration file B1; Step 5: Test: Test the reliability of the calibration file. If it passes, it will be used as the subsequent calibration file B. If it fails, repeat the first step; S2: Installing the scanning rod: installing the converter (1) and the corresponding scanning rod in the implant of the patient's oral cavity in sequence; using a visual measurement device or a structured light scanning device to measure and obtain visual data of the patient's oral cavity; S3: Obtaining oral scan data: Installing the visual measurement scanning cap, using the oral scanning device to scan and obtain the gum and opposing tooth data of the scanning cap; before step S3, it also includes disassembling the scanning rod: disassembling the visual measurement scanning rod or the structured light scanning rod; S4: Preliminary model establishment: Obtain the jaw data by transferring the occlusion, and build a preliminary 3D model by combining the oral scan data and visual data; S5: Model calibration: Calibrate the preliminary 3D model using calibration file B to obtain the final 3D model. The specific method is as follows: The scanbar in the preliminary 3D model will be corrected by the data in calibration file B, and its tilt angle will be adjusted from the top to the bottom for a certain distance as compensation. The original scanbar data will be deleted at the same time. After the compensation is completed, the partial model data of the implant in the preliminary 3D model is corrected using the corrected scan rod data. The error data is calibrated and corrected based on the visual measurement file, and finally the relevant model data of the final 3D model is obtained.

2. The method for modeling multiple consecutive missing or / and edentulous implants according to claim 1, characterized in that: In step S2, the converter (1) and the corresponding scanning rod are sequentially installed in the implant of the patient's oral cavity. The scanning rod can be a visual measurement scanning rod or a structured light scanning rod. The torque for installing the converter (1) and the scanning rod in the scanning rod is 10-15N. The visual data of the patient's oral cavity is measured and obtained using a visual measurement device or a structured light scanning device.

3. The method for modeling multiple consecutively missing or / and edentulous implants according to claim 2, characterized in that: After the model is calibrated in step S5, the scanning cap is disassembled and recycled; and a suitable restoration method and restoration are selected through the final three-dimensional model to create a restoration digital file for the user.

4. The method for modeling multiple consecutive missing or / and edentulous implants according to claim 3, characterized in that: The converter (1) in step S1 is divided from top to bottom into a scanning rod connector (11), a bearing platform (12) and an implant connector (13), wherein the upper positioning surface of the bearing platform (12) is parallel to the lower positioning surface, with a distance of X mm.

5. The method for modeling multiple consecutive missing or / and edentulous implants according to claim 4, characterized in that: Step S4 constructs a preliminary 3D model as follows: the occlusion transfer method is performed by directly scanning the patient's occlusion using an oral scan; the oral scan data is matched with the occlusal data, where the occlusal data is divided into maxillary and mandibular, and needs to be matched with the oral scan data in sequence; during the matching, the positions of the upper and lower jaws in the occlusal data are matched with the model points at the upper and lower jaws in the oral scan data. After positioning is completed through multi-point data matching, the redundant model points in the oral scan data are corrected; after the upper and lower jaw occlusal data and the oral scan data are merged into a model file to obtain the upper and lower jaw model files with occlusion, the visual measurement file is matched with the upper and lower jaw model files with occlusion; The visual measurement file obtains the relevant data of the scanning rod. In the occlusal data, some model data of the scanning auxiliary parts will appear at the relevant positions of the missing teeth. After importing the visual measurement file, the scanning rod will appear at a certain distance from the implant model to obtain a preliminary three-dimensional model.

6. The method for modeling multiple consecutive missing or / and edentulous implants according to claim 4, characterized in that: After importing the vision measurement file, the scanbody appears at a distance of 2.300 mm from the implant model.

7. The method for modeling multiple consecutively missing or / and edentulous implants according to claim 5, characterized in that: In step S4, the occlusion transfer method in model establishment adopts one or more of the following methods: biting wax or wax bank in a traditional way, directly scanning the patient's occlusion in an oral scan, or using CBCT.

8. The method for modeling multiple consecutively missing or / and edentulous implants according to claim 6, characterized in that: In the step S5, the restoration method is determined, and the restoration methods include screw-retained one-piece restoration, non-rotational personalized abutment, or titanium base bonded with zirconia.

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