Complete denture manufacturing method for determining plane and jaw position relation based on digitization

Abstract

The invention provides a complete denture manufacturing method for determining a plane and jaw position relation based on digitization, and relates to the technical field of dentistry, the method comprises the following steps: using a finished product tray to prepare an initial impression, filling a plaster model, and scanning to obtain a three-dimensional data STL file of the plaster model of the upper and lower jaws; recording the occlusion relationship by using oil sludge silicone rubber, and scanning to obtain a three-dimensional data STL file of the upper and lower jaw plaster model with the occlusion record silicone rubber; obtaining a CBCT DICOM file when the patient wears and occludes the silicone rubber, and extracting a three-dimensional data STL file of the face, the maxilla and the mandible; fitting the archive to construct a virtual patient; and digitally designing a plane and a median relation jaw position, and the like. According to the method, the upper and lower jawbones are segmented by using CBCT DICOM data, the position of the lower jawbone is moved by using software, the jaw position is accurately designed, and the false tooth is manufactured on the basis of a correct plane and a correct median relationship, so that temporomandibular joint health and false tooth stability of a patient are facilitated.

Description

Technical Field

[0001] The present invention relates to the field of dental technology, and in particular to a method for making a complete denture based on digitally determining the jaw plane and jaw position relationship. Background Art

[0002] Complete denture production is a complex and delicate technology that aims to restore oral function and aesthetics for patients who have lost all their teeth. The traditional method of complete denture production includes the preparation of the initial impression, the preparation of the final impression, the recording and transfer of the jaw relationship, the arrangement of teeth, waxing, trial fitting, and filling. Among these steps, the determination of the jaw relationship is crucial.

[0003] Maxillomandibular relationship refers to the positional relationship between the upper and lower jaws. When the mandibular condyle is located at the most anterior and superior position of the articular fossa and touches the posterior slope of the articular tubercle through the articular disc, the condyle can perform simple rotational movement in this position, which is in a physiological state without a sense of compulsion. This is called the centric relation position (CRP). When the natural dentition exists, the positional relationship between the upper and lower jaws is maintained by the close contact of the upper and lower dentition. When the natural dentition is lost, the mandible has no support from the dentition and the locking of the tooth cusps, and the mandible will move to various positions. At this time, the patient's jaw relationship can be re-determined by referring to the centric relation position.

[0004] The traditional jaw relationship recording and transfer is to use a sling to determine and record the centric relationship position at the appropriate 1 / 3 height below the face, use a face bow to record the relationship between the maxilla and the temporomandibular joint, and transfer and fix the recorded positional relationship between the maxilla, mandible and temporomandibular joint to the sling. The operation is cumbersome and the error is large. At present, the methods for determining the centric relationship for edentulous patients are generally classified into two categories, namely the Gothic arch tracing method and the direct bite method. When using these methods, clinicians usually use the physiological posterior position of the temporomandibular joint as the centric relationship position for construction. However, this method does not fully adopt the modern dental concept, that is, the condyle of the temporomandibular joint is in the uppermost and most anterior position of the articular fossa as the centric relationship position. This traditional method may cause the jaw relationship of the denture to fail to fully meet the physiological functional needs of the patient, thereby affecting the use effect of the denture and the patient's comfort.

[0005] With the development of digital technology, digital full denture production methods have gradually been applied in clinical practice. These methods use intraoral scanning, computer-aided design (CAD) and computer-aided manufacturing (CAM) technologies to achieve more efficient and accurate denture production. However, even in the application of digital technology, the determination of jaw relationship still uses traditional technical means, and fails to fully utilize the advantages of digital technology to optimize this key step.

[0006] In addition, the maxillary occlusal support is used not only for recording and transferring the jaw position, but also for recording the occlusal plane. When the maxillary occlusal support is brought into the mouth, the front of the occlusal plane of the maxillary occlusal support is required to be flush with the upper lip edge or 1-2mm below the upper lip edge, and parallel to the line connecting the pupils. The rear of the occlusal plane should be parallel to the ala-tragus line when viewed from the side. The occlusal plane parallel to the ala-tragus line is only an imaginary occlusal plane formed by two landmarks on the facial skin. It is a preliminary occlusal plane determination. Its final determination should be made by analyzing the intraoral situation on the occlusal support and adjusting the occlusal plane. The adjusted occlusal plane is required to divide the distance between the upper and lower jaws equally, the height of the posterior teeth occlusal plane should be 1 / 2~2 / 3 of the posterior molar pad, and the upper and lower alveolar ridges and wax bank planes of the upper and lower jaws should be observed and the occlusal plane should be adjusted to facilitate the force balance of the upper and lower dentures. After adjusting the maxillary plane to the appropriate height and angle, the maxillary frame needs to be re-set, which is a very cumbersome process. These operations are usually done by technicians rather than doctors. Doctors can only check whether the maxillary plane setting is appropriate when trying on dentures, which greatly increases the communication cost of medical technology.

[0007] In the existing digital full-mouth denture production method, the patient's facial information can be integrated with the intraoral information, and the doctor can analyze and adjust the optimized jaw plane in real time, solving the various disadvantages of using the maxillary jaw rest to record the transfer jaw plane. However, the acquisition of facial information data usually requires the use of expensive and complex professional equipment, such as three-dimensional facial scanners. Although these devices can provide high-precision facial data, their high cost and operational complexity limit their widespread application in routine clinical practice. This limits the application of facial information in full-mouth denture design to a certain extent.

[0008] In summary, the current full denture production technology has certain technical deficiencies in the determination of jaw relationship and the acquisition and application of facial information. How to determine the jaw relationship more accurately through digital means and acquire and apply facial information in a lower cost and more efficient way are important issues that need to be solved in the current full denture production technology. Summary of the invention

[0009] In view of this, in order to solve the problems of inaccurate determination of jaw relationship and inconvenient acquisition and application of facial information in the existing complete denture production technology, the present invention proposes a complete denture production method based on digital determination of posterior plane and jaw relationship, by introducing digital technology, optimizing the method of determining jaw relationship, and adopting simple and low-cost means of acquiring facial information, thereby achieving high precision and personalized design of complete denture production.

[0010] The present invention is implemented by the following technical solution: a method for making a complete denture based on digitally determining the jaw plane and jaw position relationship is provided, and the method comprises the following steps: S10: Use the finished tray to make a preliminary impression and pour the plaster model, use the clay silicone rubber to record the occlusal relationship, and then let the patient wear the occlusal silicone rubber to take a CBCT; obtain the STL files of the upper and lower jaw plaster models by scanning; obtain the STL files of the upper and lower jaw plaster models with the occlusal recording silicone rubber by scanning; obtain the CBCTDICOM files of the patient wearing the occlusal silicone rubber, and extract the STL files of the face, maxilla and mandible; fit the above files in the digital design software to construct a virtual patient with maxillofacial soft tissue morphology, bone tissue morphology, oral mucosal surface and the relative position relationship between the upper and lower jaws; S20: Digital design of the mandibular plane and mandibular position; S30: Digital design and 3D printing of trial dentures; S40: Confirm the aesthetic information, jaw plane, jaw relationship (vertical distance) and jaw relationship (horizontal relationship) of the trial denture through chairside examination; S50: Take the final impression using the trial denture and record the occlusal relationship; S60: Make a transitional denture and the patient wears it until the occlusion is stable; S70: Final dentures are made using duplication denture technology and the patient wears the final dentures.

[0011] Compared with the prior art, the method for making a complete denture based on digitally determining the jaw plane and jaw position relationship provided by the present invention has the following beneficial effects: 1. Accurately determine the centric relationship: Use CBCT DICOM data to segment the upper and lower jaws and use software to adjust the position of the mandible so that the mandibular condyle is located in the front and upper part of the articular concave, which can more accurately determine the centric relationship. This method is innovative in the production of complete dentures and helps the patient's temporomandibular joint health and denture stability.

[0012] 2. Accurately determine the denture plane: The digital software comprehensively analyzes the anatomical landmarks of the extraoral facial soft tissues and the anatomical information of the intraoral soft and hard tissues, and can accurately design the denture plane. At the same time, the design of the denture plane can be adjusted and optimized in real time, which greatly reduces the cost and time in the production process of full dentures.

[0013] 3. Obtain facial information at low cost: The method of extracting facial information using CBCT is low-cost and easy to obtain. Compared with traditional facial scanning equipment, the method of the present invention is more economical and affordable, and improves the convenience and popularity of operation.

[0014] 4. Comprehensive multi-morphological information for targeted design, improving production efficiency and accuracy: Comprehensive facial morphology, jaw morphology and occlusal information, and comprehensive design through digital means can improve the overall fit of dentures and ensure the unity of dentures in aesthetics, functionality and comfort. The application of digital design and 3D printing technology has significantly improved the efficiency and accuracy of full denture production and reduced the errors and cumbersome steps in the traditional manual production process.

[0015] In summary, the method for making full dentures based on digitally determining the jaw plane and jaw position relationship of the present invention not only improves the accuracy, efficiency and patient experience of full denture production, but also reduces the cost and operation difficulty. It is applied to the field of full dentures, has broad application prospects and promotion value, and helps to promote the popularization and application of digital technology in the field of full dentures, creating a new model for full denture production.

[0016] These and other aspects of the present invention will be more clearly understood in the following description of the embodiments. It should be understood that the above general description and the following detailed description are only exemplary and explanatory and cannot limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following briefly introduces the drawings required for use in the exemplary embodiments or related technical descriptions. The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings: Figure 1 This is a flow chart of a method for making a complete denture based on digitally determining the jaw plane and jaw position relationship according to an embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of a finished product tray in a method for making a complete denture based on digitally determining the jaw plane and jaw position relationship according to an embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of taking out the initial impression from the mouth in the method for making a complete denture based on digitally determining the jaw plane and jaw position relationship in an embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of a plaster model in a method for making a complete denture based on digitally determining the jaw plane and jaw position relationship according to an embodiment of the present invention.

[0021] Figure 5 This is a schematic diagram of the STL three-dimensional data file of the plaster model in the complete denture production method based on digital determination of the jaw plane and jaw position relationship in an embodiment of the present invention.

[0022] Figure 6 This is a schematic diagram of the intraoral situation before the occlusal relationship is transferred from the sludge silicone rubber in the complete denture production method based on digital determination of the jaw plane and jaw position relationship in an embodiment of the present invention.

[0023] Figure 7 This is a schematic diagram of the occlusal relationship transferred from the clay silicone rubber in the complete denture manufacturing method based on digital determination of the jaw plane and jaw position relationship in an embodiment of the present invention.

[0024] Figure 8 This is a schematic diagram of resetting the occlusal relationship of the sludge silicone rubber to the plaster model after transferring the occlusal relationship in the complete denture manufacturing method based on digital determination of the jaw plane and jaw position relationship in an embodiment of the present invention.

[0025] Fig. 9 This is a schematic diagram of scanning a plaster model and silicone rubber after transferring the occlusal relationship from the clay silicone rubber in a method for making a complete denture based on digitally determining the jaw plane and jaw position relationship in an embodiment of the present invention.

[0026] Fig.10 This is a schematic diagram of facial information in a CBCT DICOM file when a patient wears occlusal silicone rubber in a method for making a complete denture based on a digitized posterior plane and determining jaw position relationship according to an embodiment of the present invention.

[0027] Fig.11 This is a schematic diagram of jaw information and radio-blocking silicone rubber information in a CBCT DICOM file when a patient wears occlusal silicone rubber in a complete denture manufacturing method based on a digitized posterior plane and determination of jaw position relationship according to an embodiment of the present invention.

[0028] Fig.12 This is a schematic diagram of a maxillary STL three-dimensional data file extracted from a CBCT DICOM file of a patient wearing occlusal silicone rubber in a complete denture manufacturing method based on a digitized posterior plane and determination of jaw position relationship according to an embodiment of the present invention.

[0029] Fig.13 This is a schematic diagram of a mandibular STL three-dimensional data file extracted from a CBCT DICOM file of a patient wearing occlusal silicone rubber in a complete denture manufacturing method based on a digitized posterior plane and determination of jaw position relationship according to an embodiment of the present invention.

[0030] Fig.14 This is a schematic diagram of importing virtual plane plate STL data into the complete denture production method based on digitized jaw plane and determined jaw position relationship in an embodiment of the present invention, and moving the plane plate STL data file to design the jaw plane.

[0031] Fig.15This is a schematic diagram showing that the designed nasal plane can be parallel to the nasal wing and tragus surface as viewed from facial soft tissue landmark points in the method for making a complete denture based on a digitized nasal plane and determining the jaw position relationship in an embodiment of the present invention.

[0032] Fig.16 This is a schematic diagram of a method for making a complete denture based on a digitized jaw plane and determining the jaw position relationship in an embodiment of the present invention. From the perspective of the intraoral situation, the designed jaw plane should be flush with the upper lip edge or 1-2 mm below the upper lip edge, bisect the distance between the upper and lower jaws, and the height of the posterior jaw plane should be 1 / 2~2 / 3 of the posterior molar pad.

[0033] Fig.17 It is a structural schematic diagram of adjusting the mandibular position in the method for making a complete denture based on a digitized jaw plane and determining the jaw position relationship in an embodiment of the present invention.

[0034] Fig.18 This is a schematic diagram of the position of the mandibular condyle before digital adjustment in the complete denture production method based on the digitized jaw plane and the determination of the jaw position relationship in an embodiment of the present invention.

[0035] Fig.19 This is a schematic diagram of the position of the mandibular condyle after digital adjustment in the complete denture production method based on the digitized jaw plane and the determination of the jaw position relationship in an embodiment of the present invention.

[0036] Fig. 20 This is a schematic diagram comparing the positions of the mandibular condyle before and after digital adjustment in a complete denture manufacturing method based on a digitized jaw plane and determination of jaw position relationship in an embodiment of the present invention.

[0037] Fig.21 It is a structural schematic diagram of a trial denture in a method for making a complete denture based on a digitized jaw plane and determining the jaw position relationship according to an embodiment of the present invention. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0039] In some of the processes described in the specification and claims of the present invention and the above-mentioned figures, multiple operations that appear in a specific order are included, but it should be clearly understood that these operations may not be executed in the order in which they appear in this article or executed in parallel. The serial numbers of the operations, such as 101, 102, etc., are only used to distinguish different operations, and the serial numbers themselves do not represent any execution order. In addition, these processes may include more or fewer operations, and these operations may be executed in sequence or in parallel. It should be noted that the descriptions of "first", "second", etc. in this article are used to distinguish different messages, devices, modules, etc., do not represent the order of precedence, and do not limit the "first" and "second" to be different types.

[0040] The following will be combined with the drawings in the exemplary embodiments of the present invention to clearly and completely describe the technical solutions in the exemplary embodiments of the present invention. Obviously, the exemplary embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0041] Since the production of a pair of biofunctional full dentures with good adsorption requires not only a good edge sealing effect, but also a correct jaw relationship and jaw plane setting. Both traditional technology and digital full denture production can achieve good edge sealing effects, correct jaw planes and appropriate vertical distances, but the determination of horizontal jaw relationship still uses relatively traditional technical means, namely, Gothic bow or direct bite method. According to existing clinical experience, whether full dentures are traditionally made or fully digitally made, the technical means for determining the horizontal jaw relationship are nothing more than Gothic bow and direct bite method. These technologies still use the physiological posterior position of the temporomandibular joint as the centric relationship position for jaw construction, and have not yet adopted the updated jaw science concept that the CR uppermost position is used as the centric relationship for jaw construction. In addition, in the current known digital full denture production research, facial scanning data are collected by professional facial scanning equipment. However, due to the high price and cumbersome operation of facial scanning equipment, this technology cannot be popularized in routine clinical full denture production.

[0042] To this end, the present invention proposes a method for making complete dentures based on digitally determining the occlusal plane and jaw position relationship. The patient's occlusal relationship is determined by digital jaw adjustment technology. The method for making complete dentures can well solve the above-mentioned problems.

[0043] The technical solution of the present invention is further described below in conjunction with specific embodiments: See also Figure 1As shown, a method for making a complete denture based on digitally determining the jaw plane and jaw position relationship is provided in an embodiment of the present invention, and the method comprises the following steps: Step S10: Use the finished tray to make a preliminary impression and pour the plaster model, use the clay silicone rubber to record the occlusal relationship, and then let the patient wear the occlusal silicone rubber to take a CBCT; obtain the STL files of the upper and lower jaw plaster models by scanning; obtain the STL files of the upper and lower jaw plaster models with the occlusal recording silicone rubber by scanning; obtain the CBCT DICOM file when the patient wears the occlusal silicone rubber, and extract the STL files of the face, maxilla and mandible; fit the above files in the digital design software to construct a virtual patient with maxillofacial soft tissue morphology, bone tissue morphology, oral mucosal surface and the relative position relationship of the upper and lower jaws.

[0044] In this step, see Figures 2 to 5 As shown, use the finished tray to take the initial impression and pour the plaster model, see Figures 6 to 9 As shown, the occlusal relationship of the oil-sludge silicone rubber transfer.

[0045] The step S10 specifically includes: S11: Select a finished edentulous jaw tray of appropriate size, fill it with alginate impression material and place it in the patient's mouth to make the first impression, and then perform peri-mold perfusion on the impression to obtain the upper and lower jaw plaster models, which record the upper and lower jaw mucosal morphology in the patient's mouth, and obtain the three-dimensional data STL file of the upper and lower jaw plaster models by scanning; S12: Use radiation-blocking silicone rubber to make a temporary base on the upper and lower mandibular plaster models. Put the temporary base into the patient's mouth, let the patient open his mouth and place the new silicone rubber between the upper and lower mandibular temporary bases. Then let the patient close his mouth to a suitable vertical distance height. After the silicone rubber hardens, take it out of the mouth and reposition it on the plaster model. Scan to obtain the STL files of the upper and lower mandibular plaster models with bite registration silicone rubber. S13: CBCT is taken while the patient is wearing the bite registration silicone rubber in the mouth, thereby obtaining a CBCT DICOM file. This DICOM file contains the patient's facial data, jaw data, and radiopaque image data of the bite registration silicone rubber. The software is used to extract the three-dimensional STL file of the face, maxilla, and mandible in the DICOM file; S14: Fit the facial STL data, maxillary STL data, and mandibular STL data with the CBCT DICOM data; fit the STL data of the upper and lower jaw plaster models with bite recording silicone rubber with the CBCT DICOM data based on the radiopaque image of the bite recording silicone rubber; fit the maxillary plaster model STL data with the STL data of the upper and lower jaw plaster models with bite recording silicone rubber; fit the mandibular plaster model STL data with the STL data of the upper and lower jaw plaster models with bite recording silicone rubber; through the above steps, obtain a three-dimensional data file containing the face, maxilla, mandible, maxillary plaster model, and mandibular plaster mold, and construct a virtual patient with maxillofacial soft tissue morphology, bone tissue morphology, oral mucosal surface, and relative position relationship of the upper and lower jaws.

[0046] Step S20: Digitally design the position of the mandibular plane and the mandible.

[0047] In this step, see Figure 15-17 As shown, a virtual plane STL data is imported into the digital design software, and the face plane is designed by moving the plane STL data file: from the facial soft tissue landmarks, the designed face plane can be parallel to the nasal auricle surface; from the mandibular landmarks, the designed face plane can be parallel to the line connecting the left and right bony infraorbital margins; from the intraoral situation, the designed face plane needs to be flush with the upper lip edge or 1-2mm below the upper lip edge, bisect the distance between the upper and lower jaws, the height of the posterior face plane should be 1 / 2~2 / 3 of the retromolar pad, observe the upper and lower alveolar ridges and wax ridge planes, and adjust the face plane to facilitate the force balance of the upper and lower dentures.

[0048] In this step, see Figure 18-20 As shown, the position of the mandible is adjusted so that the condyle in the temporomandibular joint area is in the anterior and superior position of the glenoid fossa.

[0049] The step S20 specifically includes: S21: Import a virtual plane STL data into the digital design software, and design the nasal plane by moving the plane STL data file: from the facial soft tissue landmarks, the designed nasal plane can be parallel to the nasal wing tragus surface; from the mandibular landmarks, the designed nasal plane can be parallel to the line connecting the left and right bony orbital margins; from the intraoral situation, the designed nasal plane should be flush with the upper lip edge or 1-2mm below the upper lip edge, bisect the upper and lower jaw distance, and the height of the posterior teeth nasal plane should be 1 / 2~2 / 3 of the retromolar pad. Observe the upper and lower alveolar ridges and wax bank planes and adjust the nasal plane to facilitate the force balance of the upper and lower dentures; S22: Design the jaw position by moving the mandibular STL data file in the digital design software: adjust the mandibular position so that the condyle in the temporomandibular joint area is in the anterior and superior position of the articular fossa, and the mandibular position is in the central relationship position.

[0050] Step S30: Digitally design and 3D print trial dentures.

[0051] In this step, see Fig.21 As shown, step S30 specifically includes: digitally designing the maxillary trial denture and the mandibular trial denture, the dentition design is consistent with the tooth arrangement requirements of the full denture, and the base design is consistent with the requirements of the individual trays of the full denture.

[0052] Step S40: Confirm the aesthetic information, jaw plane, jaw relationship (vertical distance) and jaw relationship (horizontal relationship) of the trial denture through chairside examination.

[0053] In this step, the designed nasal plane can make the nasal plane parallel to the nasal auricle surface and parallel to the line connecting the left and right bony infraorbital margins. This step S40 specifically includes: S41: Wear the maxillary trial denture and check the aesthetic information and surface of the denture at the chairside; S42: Wear the maxillary trial denture and the mandibular trial denture to check and confirm the vertical distance and horizontal relationship of the occlusion.

[0054] Step S50: Use the trial denture to make a final impression and record the occlusal relationship See also Figure 12 to Figure 13 As shown in Figure 2, a virtual patient is constructed using CBCT data; see Figures 14 to 16 As shown, the mandibular position is analyzed and adjusted in the design software, and the denture is designed based on this position; see Figures 17 to 20 As shown, the digitally designed denture is made into a finished denture through the duplication denture technology, and the patient wears the final denture clinically.

[0055] The step S50 specifically includes: S51: Final impressions are made using the maxillary and mandibular trial dentures; S52: Use bite registration silicone rubber to record the occlusal relationship.

[0056] Step S60: Make transitional dentures and the patient wears them until the occlusion is stable The step S60 specifically includes: S61: Cast the final impression into a final model, transfer the final model to the average jaw frame using bite-registering silicone rubber, make the base with wax, and arrange the teeth with resin artificial teeth; S62: Carry out box filling and make transitional dentures; S63: The patient wears transitional dentures, has regular follow-up visits and jaw adjustments, and wears them until the occlusion is stable.

[0057] Step S70: The final denture is made using the duplication denture technology, and the patient wears the final denture.

[0058] The method for making full dentures based on digital determination of the mandibular plane and jaw position relationship of the present invention directly adjusts the mandibular position by digital visualization, and places the mandibular condyle in the anterior and superior position of the articular concavity to determine the centric position. This technology has been used in fixed restoration occlusal reconstruction or treatment of temporomandibular joint disease, but no one in the field of full dentures has used this technology to determine the jaw position relationship. Compared with the use of facial scanning equipment to extract facial information, extracting facial information through CBCT has the advantages of low cost and easy acquisition, which is helpful to popularize the application of facial information in digital full denture design.

[0059] The method for making a full denture based on digital determination of the jaw plane and jaw position relationship of the present invention can more accurately determine the centric relationship by digitally adjusting the position of the mandible so that the mandibular condyle is located in the front and upper position of the articular concave. The method is innovative in the production of full dentures and can significantly improve the fit and functionality of the dentures. The method of extracting facial information using CBCT is low-cost and easy to obtain. Compared with traditional facial scanning equipment, the method of the present invention is more economical and practical, greatly reducing the cost in the process of making full dentures, and improving the convenience and popularity of operation. Comprehensively designing by digital means by integrating facial morphology, jaw morphology and occlusal information can improve the overall fit of the denture and ensure the unity of the denture in aesthetics, functionality and comfort. The application of digital design and 3D printing technology significantly improves the efficiency and accuracy of full denture production and reduces the errors and cumbersome steps in the traditional manual production process. Visual design and adjustment are realized: through the digital process, the need for patients to return for multiple visits is reduced, and the patient experience and satisfaction are improved. At the same time, the adaptability and comfort of dentures have also been significantly improved. The jaw relationship and denture structure can be adjusted and optimized in real time during the design process to ensure that the final denture meets the patient's personalized needs.

[0060] In summary, the method for making full dentures based on digitally determining the jaw plane and jaw position relationship of the present invention not only improves the accuracy, efficiency and patient experience of full denture production, but also reduces the cost and operation difficulty. It is applied to the field of full dentures, has broad application prospects and promotion value, and helps to promote the popularization and application of digital technology in the field of full dentures, creating a new model for full denture production.

[0061] It should be understood that, although described in a certain order, these steps are not necessarily performed in sequence in the above order. Unless there is clear explanation in this article, the execution of these steps does not have strict order restriction, and these steps can be performed in other orders. Moreover, a part of the steps of the present embodiment may include a plurality of steps or a plurality of stages, and these steps or stages are not necessarily performed at the same time, but can be performed at different times, and the execution order of these steps or stages is not necessarily performed in sequence, but can be performed in turn or alternately with at least a part of the steps or stages in other steps or other steps.

[0062] In one embodiment, a computer device is also provided in an embodiment of the present invention, comprising at least one processor and a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor executes the steps of the method for making a complete denture based on digitally determining the jaw plane and the jaw position relationship.

[0063] In one embodiment, the present invention also provides a computer-readable storage medium, which stores computer instructions, and the computer instructions are used to enable the computer to execute the steps of the method for making a complete denture based on digitally determining the jaw plane and jaw position relationship.

[0064] A person skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be realized by instructing the relevant hardware through a computer program represented by computer instructions, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory.

[0065] Non-volatile memory may include read-only memory, magnetic tape, floppy disk, flash memory or optical storage, etc. Volatile memory may include random access memory or external cache memory. As an illustration and not limitation, RAM may be in various forms, such as static random access memory or dynamic random access memory, etc.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for making a complete denture based on digital determination of the jaw plane and jaw position relationship, characterized in that: The method comprises the following steps: S10: Use the finished tray to make a preliminary impression and pour the plaster model, use the clay silicone rubber to record the occlusal relationship, and then let the patient wear the occlusal silicone rubber to take a CBCT; obtain the STL files of the upper and lower jaw plaster models by scanning; obtain the STL files of the upper and lower jaw plaster models with the occlusal recording silicone rubber by scanning; obtain the CBCT DICOM file of the patient wearing the occlusal silicone rubber, and extract the STL files of the face, maxilla and mandible; fit the above files in the digital design software to construct a virtual patient with maxillofacial soft tissue morphology, bone tissue morphology, oral mucosal surface and the relative position relationship of the upper and lower jaws; S20: Digital design of the mandibular plane and mandibular position; S30: Digital design and 3D printing of trial dentures; S40: chairside examination to confirm the aesthetic information, posterior plane, vertical distance and horizontal relationship of the trial denture; S50: Take the final impression using the trial denture and record the occlusal relationship; S60: Make a transitional denture and the patient wears it until the occlusion is stable; S70: Final dentures are made using duplication denture technology and the patient wears the final dentures.

2. The method for making a complete denture based on digitally determining the jaw plane and jaw position relationship according to claim 1, characterized in that: Step S10 specifically includes: S11: Select a finished edentulous jaw tray of appropriate size, fill it with alginate impression material and place it in the patient's mouth to make the first impression, and then perform peri-mold perfusion on the impression to obtain the upper and lower jaw plaster models, which record the upper and lower jaw mucosal morphology in the patient's mouth, and obtain the three-dimensional data STL file of the upper and lower jaw plaster models by scanning; S12: Use radiation-blocking silicone rubber to make a temporary base on the upper and lower mandibular plaster models. Put the temporary base into the patient's mouth, let the patient open his mouth and place the new silicone rubber between the upper and lower mandibular temporary bases. Then let the patient close his mouth to a suitable vertical distance height. After the silicone rubber hardens, take it out of the mouth and reposition it on the plaster model. Scan to obtain the STL files of the upper and lower mandibular plaster models with bite registration silicone rubber. S13: CBCT is taken while the patient is wearing the bite registration silicone rubber in the mouth, thereby obtaining a CBCT DICOM file. This DICOM file contains the patient's facial data, jaw data, and radiopaque image data of the bite registration silicone rubber. The software is used to extract the three-dimensional STL file of the face, maxilla, and mandible in the DICOM file; S14: Fit the facial STL data, maxillary STL data, and mandibular STL data with the CBCT DICOM data; fit the STL data of the upper and lower jaw plaster models with bite recording silicone rubber with the CBCT DICOM data based on the radiopaque image of the bite recording silicone rubber; fit the maxillary plaster model STL data with the STL data of the upper and lower jaw plaster models with bite recording silicone rubber; fit the mandibular plaster model STL data with the STL data of the upper and lower jaw plaster models with bite recording silicone rubber; through the above steps, obtain a three-dimensional data file containing the face, maxilla, mandible, maxillary plaster model and mandibular plaster mold, and construct a virtual patient with maxillofacial soft tissue morphology, bone tissue morphology, oral mucosal surface, and relative position relationship of the upper and lower jaws.

3. The method for making a complete denture based on digitally determining the jaw plane and jaw position relationship according to claim 1, characterized in that: Step S20 specifically includes: S21: Import a virtual plane STL data into the digital design software, and design the nasal plane by moving the plane STL data file: from the facial soft tissue landmarks, the designed nasal plane can be parallel to the nasal wing tragus surface; from the mandibular landmarks, the designed nasal plane can be parallel to the line connecting the left and right bony orbital margins; from the intraoral situation, the designed nasal plane should be flush with the upper lip edge or 1-2mm below the upper lip edge, divide the upper and lower jaw distance equally, the height of the posterior teeth nasal plane should be in the upper half of the molar back pad, observe the upper and lower alveolar ridges and wax ridge planes, and adjust the nasal plane to facilitate the force balance of the upper and lower dentures; S22: Design the jaw position by moving the mandibular STL data file in the digital design software: adjust the mandibular position so that the condyle in the temporomandibular joint area is in the anterior and superior position of the articular fossa, and the mandibular position is in the central relationship position.

4. The method for making a complete denture based on digitally determining the jaw plane and jaw position relationship according to claim 3, characterized in that: The designed jaw plane should be flush with the upper lip edge or 1-2mm below the upper lip edge, equally divide the distance between the upper and lower jaws, and the height of the jaw plane of the posterior teeth should be 1 / 2~2 / 3 of the retromolar pad.

5. The method for making a complete denture based on digitally determining the jaw plane and jaw position relationship according to claim 1, characterized in that: Step S30 specifically includes: The maxillary and mandibular trial dentures are digitally designed. The dentition design is consistent with the tooth arrangement requirements of full dentures, and the base design is consistent with the requirements of individual trays of full dentures.

6. The method for making a complete denture based on digitally determining the jaw plane and jaw position relationship according to claim 1, characterized in that: Step S40 specifically includes: S41: Wear the maxillary trial denture and check the aesthetic information and surface of the denture at the chairside; S42: Wear the maxillary trial denture and the mandibular trial denture to check and confirm the vertical distance and horizontal relationship of the occlusion.

7. The method for making a complete denture based on digitally determining the jaw plane and jaw position relationship according to claim 1, characterized in that: Step S50 specifically includes: S51: Final impressions are made using the maxillary and mandibular trial dentures; S52: Use bite registration silicone rubber to record the occlusal relationship.

8. The method for making a complete denture based on digitally determining the jaw plane and jaw position relationship according to claim 1, characterized in that: Step S60 specifically includes: S61: Cast the final impression into a final model, transfer the final model to the average jaw frame using bite-registering silicone rubber, make the base with wax, and arrange the teeth with resin artificial teeth; S62: Carry out box filling and make transitional dentures; S63: The patient wears transitional dentures, has regular follow-up visits and jaw adjustments, and wears them until the occlusion is stable.

9. A computer device, characterized in that: include: At least one processor, and a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor executes the method for making a complete denture based on digitally determining the jaw plane and jaw position relationship as described in any one of claims 1 to 8.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable the computer to execute the method for making a complete denture based on digitally determining the jaw plane and jaw position relationship as described in any one of claims 1 to 8.

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