Modeling method for multiple continuous deletion or / and edentulous jaw implants

Abstract

The invention provides a multi-continuous deletion or / and edentulous implant modeling method and a multi-continuous deletion or / and edentulous implant modeling method, belongs to the technical field of medical digitization, and provides a special converter system aiming at an implant horizontal repair case containing a plurality of implant cases in edentulous implant. Based on a principle of combining a vision measurement technology and a structured light scanning technology, a model of a plurality of dental implants can be established at one time, so that a data basis is provided for subsequent repair, the doctor seeing time of a patient is shortened, and the comfort level of the patient is improved; according to the implant modeling method, through initial modeling and model correction, the modeling precision is greatly improved, and an accurate data basis is provided 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 consecutive 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 is very uncomfortable and has a strong pharyngeal reflex and vomiting feeling;

[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 the superposition of photos based on the principle of structured light photography and imaging. 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 method is to use extraoral scanning technology based on visual measurement technology (or photogrammetry technology). However, due to factors such as insufficient occlusal space and economic considerations, many such cases in clinical practice do not use composite abutments but are directly repaired at the implant level. This type of repair method generally chooses an intraoral scanning scan rod and then selects a personalized abutment repair method. However, this method often encounters problems with occlusal accuracy and crown proximity accuracy in the CAD / CAM stage of the denture processing factory, which is due to the limitations of oral 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. Only visual measurement scanning rods can be made one by one. Such a large number of brands and models brings manufacturing difficulties and high costs, and cannot 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 the optical scanning solution based on the implant level for such cases. While meeting the accuracy requirements, it is more comfortable and saves more time than the traditional method of taking impressions. 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 establishment: 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 in 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 a scanning cap, install a visual measurement scanning cap, and use an oral scan device to scan and acquire gum and opposing tooth data of the scanning cap; Optionally, before step S3, it also includes disassembling a scanning rod: disassembling a visual measurement scanning rod or a structured light scanning rod;

[0012] S4: Preliminary model establishment: Obtain the jaw data by transferring the occlusion, and build a preliminary three-dimensional model in combination with 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, it also includes disassembling the scanning cap, removing the scanning cap and recycling it; and selecting the appropriate restoration method and restoration through the final three-dimensional model to create a digital restoration file for the user.

[0015] Beneficial effects of the present invention:

[0016] 1. It can build models of multiple dental implants at one time, so as to provide a data basis for subsequent restoration, shorten the patient's consultation time and improve 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 a 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 scanning data of the scanning rod, (5) is preliminary spatial model data of the scanning rod, (6) is scanning data after calibration of the scanning rod, and (7) is final spatial model data after calibration;

[0022] Figure 3 It is a visual schematic 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 make the technical solution of the present invention better understood by the technical personnel in the field, 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 the embodiments. The embodiments are only used to illustrate the present invention and are not used 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 establishment: 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, wherein 1 is a converter, 11 is a scanning rod connector, 12 is a bearing platform, and 13 is an 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, the distance is X millimeters, X∈[2,5], and the error is ±0.005mm.

[0030] The upper positioning surface of the support platform 12 is used to calibrate the scanning rod connector 11, and the lower positioning surface is used to calibrate with the implant connector 13. Since the space in the patient's oral cavity is limited, the support platform 12 will take up extra space, so the thickness X of the support platform 12 can only be 2-5mm. In order to ensure the subsequent accuracy, the error of the physical part needs to be kept within 0.005mm.

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

[0032] S2: installing a scanning rod, and 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 the implant of the patient's mouth in sequence. The scanning rod can be a visual measurement scanning rod or a structured light scanning rod. Preferably, the torque for installing the converter 1 and the scanning rod in the scanning rod is 10-15N; the converter needs to be manually screwed on the implant with a torque wrench. If the force is too large, the distance will be reduced to 15N. Because the size of the torque will affect the height, too little force will loosen, so each converter needs the same torque of 15N to be installed on the implant. After installation, a panoramic film (full jaw curved surface tomography) is required to confirm whether the converter is installed in place. If it is not in place, check whether it is alveolar bone interference or gingival interference. After processing according to the actual situation, take a panoramic film again to confirm until it is fully in place.

[0034] Data measurement: Use visual measurement equipment or structured light scanning equipment to measure and obtain the visual data of the patient's oral cavity. Taking the visual measurement equipment as an example, the patient needs to be in an upright position with the corners of the patient's mouth open. The light of the visual measurement equipment and the visual measurement scanning rod should be kept as vertical 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 the two sides of the scanning rod to meet the requirements. Structured light scanning equipment, such as intraoral scanners, can also be used. The visual measurement file obtains the relevant data of the scanning rod, which will not be elaborated 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 opposing teeth data of the scanning cap, see the attached Figure 3 Scanning 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 of the scanning cap installation; a torque wrench can be used for manual installation, and a probe can be used to check whether there is a 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 part needs to scan the alveolar ridge, labial and buccal mucosa, and the entire hard palate to the maxillary tubercle of the palatal fossa; the mandibular part needs to scan the alveolar ridge, labial and buccal mucosa, retromolar pads, and opposing jaw; each tooth of 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 in combination with 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; obtaining the jaw data by transferring the occlusion and combining it with the visual data to build a preliminary three-dimensional model specifically includes:

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

[0040] Match the mouth scan data with the bite data, where the bite data is divided into maxillary and mandibular, and needs to be matched with the mouth scan data in turn. When matching, the positions of the upper and lower jaws in the bite 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 bite data of the maxillary and mandibular are merged with the mouth scan data into a model file, and the upper and lower jaw model files with occlusion are obtained, the visual measurement file is 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 in the outer segment) will appear at the relevant position of the missing tooth; after importing the visual measurement file, the scanning rod will appear at a distance of 2.300 mm from the model of the implant, thereby obtaining a preliminary three-dimensional model.

[0042] Preferably, the occlusal 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 method 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 by 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 scanning rod in the preliminary 3D model will move a certain distance from the top to the tail of the scanning rod itself according to its own tilt angle under the data correction of the calibration file B, which is regarded as compensation. At the same time, the original scanning rod data is deleted, and 2.300mm is used in this implementation.

[0046] After the compensation is completed, the partial model data of the implant in the preliminary 3D model is corrected again through the corrected scan rod data, and the error data (including angles, etc.) is corrected again based on the visual measurement file. Finally, the relevant model data of the final 3D model is obtained.

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

[0048] Furthermore, after the model is calibrated, it also includes disassembling the scanning cap, removing the scanning cap and recycling it; and selecting the appropriate restoration method and restoration 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 a screw-retained one-stage restoration, a non-rotational personalized abutment, or a titanium base bonded with zirconia.

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

[0051] Step 1: Install the test model: The test model is constructed by assembling and debugging the substitute body, converter 1 and scanning rod in sequence. The installation sequence is: Figure 2 The final model structure after installation is (1), (2) and (3). 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) in , the corresponding spatial data model is Figure 2 As shown in (5);

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

[0054] Step 4: Construct the calibration file: Bring the data transformation process between a and A into the visual measurement software as the calibration file B1; it should be noted that the data transformation process is not simply subtracting 2.300 mm from the vertical coordinate, but the data correction for multiple positioning points of the scanning rod, that is, the overall data change along a certain direction, for example, when tilted, it moves along the tilt angle instead of 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 the first step. Calibration file B can be used as the calibration file for all subsequent dental implants, not just a single dental 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 familiar with the technology may modify or change the above embodiments without violating the spirit and scope of this patent application. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in this patent application should still be covered by the claims of this patent application.

Claims

1. A method for modeling multiple consecutive missing or / and edentulous jaw implants, characterized in that: The steps include: S1: Calibration file establishment: 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; S2: Installing the scanning rod: installing the converter (1) and the corresponding scanning rod in the implant in 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: Acquire oral scan data, install a scanning cap, install a visual measurement scanning cap, and use an oral scan device to scan and acquire gum and opposing tooth data of the scanning cap; Optionally, before step S3, it also includes disassembling a scanning rod: disassembling a visual measurement scanning rod or a structured light scanning rod; S4: Preliminary model establishment: Obtain the jaw data by transferring the occlusion, and build a preliminary three-dimensional model in combination with the acquired visual data; S5: Model calibration: Calibrate the preliminary three-dimensional model using the calibration file B to obtain the final three-dimensional model.

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

4. The method for modeling multiple consecutive missing or / and edentulous jaw implants according to claim 2, characterized in that The specific establishment method in the compensation file establishment in S1 is as follows: Step 1: Installing the test model: The test model is constructed by assembling and debugging the substitute body, the converter (1) and the scanning rod in sequence; Step 2: Obtain preliminary spatial data: Capture the spatial data of the scanning rod a by three-dimensional scanning; Step 3: Obtaining real space data: In EXOcad, the coordinates obtained from the space data are moved down by the elevation distance X mm brought by the converter (1) to obtain the real space data A; Step 4: Build calibration file: Bring the real spatial data A into the visual measurement software as 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.

5. The method for modeling multiple consecutive missing or / and edentulous jaw 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 millimeters.

6. The method for modeling multiple consecutive missing or / and edentulous jaw implants according to claim 4, characterized in that: The construction method of the preliminary three-dimensional model in step S4 is as follows: the transfer bite method is to directly scan the bite of the patient by means of a mouth scan method; the mouth scan data and the bite data are matched, wherein the bite data is divided into the upper jaw and the lower jaw, and needs to be matched with the mouth scan data in sequence; when matching, the positions of the upper and lower jaws in the bite data are matched with the model points at the upper and lower jaws in the mouth scan data, and after the positioning is completed by multi-point data matching, the redundant model points in the mouth scan data are corrected; after the bite data of the upper and lower jaws and the mouth scan data are merged into a model file, and after the upper and lower jaw model files with occlusion are obtained, 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, so as to obtain a preliminary three-dimensional model.

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

8. The method for modeling multiple consecutive missing or / and edentulous jaw implants according to claim 6, characterized in that: Step S5: Calibration file B is used to calibrate the preliminary three-dimensional model as follows: The scanning rod in the preliminary 3D model will be corrected by the data in the calibration file B, and will move a certain distance from the top end to the tail end of the scanning rod along its own tilt angle, which is regarded as compensation. At the same time, the original scanning rod data will be deleted; After the compensation is completed, the partial model data of the implant in the preliminary three-dimensional model is corrected again through the corrected scanning rod data, and the error data is corrected for the second time based on the visual measurement file, and finally the relevant model data of the final three-dimensional model is obtained.

9. The method for modeling multiple consecutive missing or / and edentulous jaw implants according to claim 5, characterized in that: In step S4, the transfer occlusion method in model establishment adopts one or more of the traditional methods of biting wax or wax ridge, directly scanning the patient's occlusion by oral scanning, or using CBCT.

10. The method for modeling multiple consecutive missing or / and edentulous jaw implants according to claim 6, characterized in that: In step S9, 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.

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