Complete denture and full-process digital complete denture manufacturing method

Abstract

The invention discloses a complete denture with personalized gingiva and a full-process digital manufacturing method of the complete denture. The complete denture comprises a step of generating a diagnostic tray type denture with anterior tooth aesthetic parameters through digital design and virtual tooth arrangement according to a digital impression and a preliminary jaw position relationship, and a step of designing the personalized gingiva by using a bionic resin molding method. Wherein the diagnosis tray type false tooth entity is of a sectional type structure or a non-sectional type structure; the design of the personalized gingiva comprises the steps of reducing manual operation by adopting digital manufacturing, directly outputting a false tooth by adopting a three-dimensional printing / cutting technology, and omitting tedious procedures such as boxing, tooth boiling and polishing, and on the basis, digital back cutting is further adopted, and then the personalized gingiva is designed by adopting a bionic resin molding method, so that the manufacturing period is greatly shortened, and the production cost is reduced. And the subsequent secondary copying or remanufacturing time and adaptation time are also greatly shortened, a digital solution is provided for reconstructing the jaw position through full-mouth planting occlusion, and development, integration and the like of digital and intelligent data are facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of oral prosthetics, in particular to the field of full denture or full implant occlusal reconstruction for edentulous jaws, and more particularly to a full denture manufacturing method based on full-process digitization and a full denture obtained therefrom. BACKGROUND

[0002] After all teeth are lost, if not repaired in time, it will lead to masticatory dysfunction, nutritional intake disorder, and even systemic diseases such as cardiovascular diseases. Although implant dentures have been widely used in the field of oral prosthetics in recent years, due to the limitations of patient's general condition, jaw bone condition, psychological factors and economic condition, the classic mucosa-supported full denture is still an important means for oral and maxillofacial function reconstruction of edentulous patients. The current traditional full denture prosthetic technology has problems such as complex operation, many visits, long production cycle, high dependence on doctor and technician experience, and difficulty in adapting to the function of the denture after wearing, etc., which need to be solved through technical innovation.

[0003] In view of these problems, some basic technical innovation and interdisciplinary integration have been carried out. EnvisionTEC in Germany developed a medical-grade light-cured resin that supports 25μm layer thickness printing, combined with topological optimization structure design, which reduces the weight of the denture by 20% while maintaining high strength. Japan focuses on biomechanical research, Tokyo Medical and Dental University optimizes the shape of the denture base through finite element analysis, reduces the peak value of mucosal stress by 35%, and realizes personalized aesthetic design combined with AI algorithm. In the aspect of standardization, the European Union issued the "Digital Denture Clinical Operation Guidelines", which standardizes the data acquisition accuracy (requires scanning error ≤30μm) and software compatibility standard, and promotes cross-country data interconnection. It is worth noting that the super-speed light-cured printer developed by Nexa3D company in Israel has realized commercial application, and its distributed manufacturing mode is reshaping the global denture supply chain.

[0004] China has also carried out a lot of research in the field of digital full denture. For example, Peking University and other institutions have applied 3D printing technology to the production of diagnostic dentures, and through digital scanning combined with improved traditional jaw relation record, the accuracy of the impression and the efficiency of the jaw relation determination have been improved. The 3D digital printing technology developed by Zhang Zhenyu team uses high-precision intraoral scanner (accuracy up to 20μm) and artificial intelligence aided design software. In the aspect of material research and development, domestic enterprises such as Aier have launched biocompatible resin and zirconia ceramic materials, combined with topological optimization algorithm, which improves the bending strength of the denture by more than 30%.

[0005] The information in the background art is merely intended to explain the overall background of the present application and should not be considered as admitting or in any form implying that these information constitutes prior art known to those skilled in the art. SUMMARY

[0006] To solve at least part of the technical problems in the prior art, the present application provides a full-process digitalized complete denture manufacturing method, which realizes full digitalization of processes such as impression and manufacturing, and can completely replace the traditional complete denture manufacturing method. Specifically, the present application includes the following contents.

[0007] In a first aspect, the present application provides a method for full-process digitalized manufacturing of complete denture with personalized gingiva, comprising the following steps: (1) obtaining data of mucosal surface morphology of upper and lower edentulous jaws, generating a digital impression, scanning a preliminary jaw relationship by using a self-designed jaw record to obtain a preformed device, generating a diagnostic tray-type denture with anterior aesthetic parameters by digital design and virtual tooth arrangement according to the digital impression and the preliminary jaw relationship, the diagnostic tray-type denture entity being a segmented structure or a non-segmented structure, and designing an adapter accessory with a digitalized Gothic arch tracing needle and a tracing board, and manufacturing the diagnostic tray-type denture entity; (2) trying on the diagnostic tray-type denture entity which is segmented or non-segmented, verifying or adjusting the vertical distance and / or aesthetic parameters, and making slight adjustments if necessary, taking a closed-mouth impression to obtain a final impression, determining the horizontal jaw relationship by using the Gothic arch tracing needle to trace the mandibular movement trajectory under the assistance of an electronic facebow, combining with the mandibular trajectory characteristics displayed by, for example, speech method, and using a denture stabilizer to assist the retention of the diagnostic tray-type denture entity if necessary, fixing the adjusted diagnostic tray-type denture entity, and scanning to obtain a final accurate digital impression and precise digital jaw relationship, further adjusting the virtual tooth arrangement data according to these data, and finally obtaining a cutting digital complete denture, and further manufacturing a complete denture entity; and (3) trying on the preliminary complete denture entity, and further adjusting it in small amounts according to the situation to obtain a final complete denture.

[0008] In some embodiments, the diagnostic tray-type denture or the preliminary complete denture entity of the present application has a non-segmented structure or a one-piece structure, i.e., it comprises a one-piece upper diagnostic denture and a one-piece lower diagnostic denture. Exemplarily, the upper diagnostic denture comprises an upper dentition, an upper tray, and a Gothic arch board. Exemplarily, the lower diagnostic denture comprises a lower tray and a Gothic arch tracing needle, preferably, the height of the tracing needle is higher than the height of the tray. Also preferably, the lower diagnostic denture comprises an incomplete dentition or lacks a tooth tip portion of 1-5 mm, for example, 2-3 mm, or does not contain a dentition at all, thereby making the height of the tracing needle higher than the height of the tray.

[0009] In some embodiments, the diagnostic tray-type denture or preliminary complete denture of the present invention has a segmented, split, or detachable structure, i.e., the maxillary diagnostic denture and / or mandibular diagnostic denture consists of at least two segmented components. Preferably, the segmented components of the maxillary or mandibular diagnostic denture can be combined to form a complete maxillary or mandibular diagnostic denture. The combination of the segmented components can be achieved by any known method, such as bonding, snap-fitting, etc. For example, the segmented components can be bonded together using adhesives, waxes, occlusal recording materials, etc. Furthermore, polymeric materials, such as occlusal recording materials like silicone rubber, can be added between the segmented components to increase the height of the assembled denture. The segmented structure of the present invention can reset the contact surfaces during occlusion, providing stable support for occlusion, which is beneficial for testing occlusal height and greatly improves the accuracy of closed impressions. When performing Gothic arch movement, the segmented components (e.g., dental arch components) are removed, thereby ensuring free movement of the maxillary diagnostic denture during movement, such as protrusion and lateral movements.

[0010] In some embodiments, the mandibular diagnostic denture or preliminary complete denture entity of the present invention has a segmented structure, for example, including a lower tray assembly and a lower dentition assembly, the two components of which can be combined to form a complete mandibular diagnostic denture. The height of the lower dentition assembly is not limited, as long as it is sufficient that the height of the tracing needle is greater than the contact surface between the lower tray assembly and the lower dentition assembly when the lower dentition assembly is removed, or as long as the upper and lower dentitions do not contact each other when the tracing needle contacts the tracing plate during a trial fitting of the preliminary complete denture entity. Preferably, the lower tray assembly includes a tray and a tracing needle assembly integrally formed therewith.

[0011] In some embodiments, the maxillary diagnostic denture or preliminary complete denture body of the present invention has a segmented structure, for example, including an upper tray assembly and an upper dentition assembly, the two components being combinable to form a complete maxillary diagnostic denture. The height of the upper dentition assembly is not limited, as long as it is sufficient to ensure that when the tracing needle contacts the tracing plate in the upper tray assembly after the upper dentition assembly is removed, the lower diagnostic denture's dentition does not contact the maxillary diagnostic denture or is spaced apart from it; or, as long as when the preliminary complete denture body is tried on and the tracing needle contacts the tracing plate, the upper and lower dentitions do not contact each other. Preferably, the upper tray assembly includes a tray and a tracing plate integrally formed therewith.

[0012] In some implementations, the method for fully digitally fabricating complete dentures with personalized gingiva according to the first aspect involves acquiring data on the mucosal surface morphology of the maxillary and mandibular edentulous jaws by passively shaping the mucosal morphology through multiple round trips, combined with different pattern marking methods and intraoral and extraoral scanning techniques.

[0013] In some embodiments, the method for full-process digital fabrication of complete denture with personalized gingiva according to the first aspect, wherein the independently designed jaw record taking preformed device comprises a main body structure 10 (including a first face 11 and a second face 12), a side edge protruding from the first face 11, a fixing hole 30, and an optional jaw wing 40. The first face 11 is designed to be in contact with the palate, and the second face 12 is the opposite face of the first face 11, i.e., the face that can be in contact with the tongue after the preformed device is placed in the mouth. The side edge comprises a first side edge 21 and a second side edge 22, which are respectively located on the left and right sides of the preformed device, and the side edge is designed to have a structure that is in contact with the alveolar ridge. The first side edge 21 and the second side edge 22 are respectively provided with a fixing hole 30 for impression material on the lower side. The fixing hole 30 has a hole structure that penetrates through the first face 11 and the second face 12 of the main body, and has a protruding part 31 on the second face 12, which has a groove structure that is in contact with the alveolar ridge of the mandible. The jaw wing 40 of the present application comprises a first jaw wing and a second jaw wing, which are respectively located on the left and right sides. Preferably, they are connected or integrally formed with the side edge. Preferably, the ends of the first jaw wing and the second jaw wing are close to each other, but cannot be connected, and need to maintain a certain distance, so as to facilitate intraoral scanning. Preferably, according to the statistical data of the size of the dental arch of Chinese people, different models of jaw record taking preformed devices are designed, such as three models of large, medium and small, or more models, to be suitable for different patients. The structures of different models can be designed to be the same, and the only difference is the size. The size usually includes the length of the preformed device from front to back or the width from left to right.

[0014] In some embodiments, the method for full-process digital fabrication of complete denture with personalized gingiva according to the first aspect, wherein the try-in of the segmented or non-segmented diagnostic tray type denture entity is performed with trimming, active plastic edge impression taking, and observation of the anterior aesthetic area, and appropriate trimming and modification are performed, and the center line, occlusal plane and incisor exposure information are accurately marked.

[0015] In some embodiments, the method for full-process digital fabrication of complete denture with personalized gingiva according to the first aspect, further comprising connecting an electronic movement face bow on the diagnostic tray type denture entity through an adapter accessory, tracing the mandibular movement trajectory of the patient (known company software and hardware can be used, and the figure of the present application is only an example), using the digitalized Gothic arch information to find and determine the centric position, or the habitual position of the patient, which can be stably reproduced, improving the limitations of the experience-based determination in the traditional fabrication method, and selecting the occlusal position.

[0016] In some embodiments, the method for full-process digital fabrication of complete denture with personalized gingiva according to the first aspect, wherein the scanning of step (2) comprises the adjusted upper and lower jaw diagnostic tray type denture entity, and matches the final occlusion relationship.

[0017] In some embodiments, the method of full-process digital fabrication of a complete denture with personalized gingiva according to the first aspect further comprises trimming the replica denture model, cutting off the outer part of the border area, reversing the normal line, obtaining a working model with occlusion relationship, generating a cutting file using complete denture software design, and cutting to obtain the final denture.

[0018] In some embodiments, the method of full-process digital fabrication of a complete denture with personalized gingiva according to the first aspect further comprises the step of designing personalized gingiva.

[0019] In some embodiments, the method of full-process digital fabrication of a complete denture with personalized gingiva according to the first aspect, wherein designing personalized gingiva comprises digitally cutting out a biomimetic gingiva space using software, followed by overcutting, i.e. polishing texture and / or undercutting, followed by roughening the bottom surface by sandblasting, followed by simple injection molding combined with thermal setting resin for biomimetic gingiva restoration after color shading of the light-cured resin.

[0020] The second aspect of the present application provides a complete denture fabricated by the method according to the first aspect.

[0021] The full-digital impression process of the present application can completely replace traditional impression taking, and precise data can be obtained by intraoral scanning once, avoiding the repeated impression taking, mold pouring and model trimming steps of traditional impression, saving 1-2 clinic visits, and greatly improving patient comfort. In addition, compared with BPS technology and functional easy-to-adapt complete denture technology, the optical impression replaces the traditional impression, the electronic face bow replaces the mechanical face bow + gothic arch tracing, the technical sensitivity is lower, and the jaw relationship recording is more accurate. After oral scanning, the occlusion scheme is directly generated by software pre-dental arrangement and electronic face bow, saving the intermediate steps of wax trial, jaw recording, etc. And the present application reduces manual operation by using digital manufacturing. 3D printing / cutting technology directly outputs dentures, saving the cumbersome processes of boxing, boiling teeth, and polishing, and shortening the production cycle from 4-6 weeks to 1-3 days. AI-assisted decision-making reduces adjustments, and AI aesthetic design and occlusion simulation avoid common problems in advance, reduce the number of clinical adjustments, and finally the denture only needs to be adjusted once to complete.

[0022] In summary, the digital technology of the present application converts the manual operation relying on experience in traditional technology into an efficient and controllable standardized process through data precision, process automation and decision intelligence, and the overall efficiency is improved by more than 50%. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 Flowchart of an exemplary full-process digital fabrication method of a complete denture; Figure 2Example different combinations of digital primary impression acquisition protocols; Figure 3 Example maxillo-mandibular intraoral scan results; Figure 4 Example occlusal relationship scan results; Figure 5 Example digital pre-dental set-up procedure; Figure 6 Example designed non-segmented diagnostic denture tray including integrated Gothic arch + electronic facebow + adapter attachment, where known company software and hardware can be used, the figure is just an example; Figure 7 Example printed non-segmented diagnostic denture tray physical model; Figure 8 Example gingival preparation procedure. a. color masking result for backfilling light sensitive resin curing; b. biomimetic effect color light curing result; c. simple injection molding heat condensation result; d. polishing high polishing result; Figure 9 Example gingival preparation result, conventional self-curing group edge bonding is poor, there are bubbles, surface finish is poor; injection molding heat condensation resin pressure polymerization bonding is better, there are almost no bubbles, surface finish is better; Figure 10 Example structure of jaw record taking pre-form device; Figure 11 Example structure of segmented diagnostic denture tray (mandibular diagnostic denture) of the present application, including lower dentition (A) and tray (B, not shown recording needle assembly); Figure 11 Figure 11 Example structure of segmented diagnostic denture tray (mandibular diagnostic denture) of the present application, including lower dentition (A) and tray (B, not shown recording needle assembly); Figure 12 Example structure of segmented diagnostic denture tray (mandibular diagnostic denture) of the present application, including lower dentition (A) and tray (B, not shown recording needle assembly); DETAILED DESCRIPTION

[0024] The various example embodiments of the present application will now be described in detail, which should not be considered limiting on the present application, but rather as a description of certain aspects, features, and embodiments of the present application.

[0025] ​It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. Additionally, for a range of values, the endpoints are included within the range. Any smaller range within a range of values is also contemplated. In each instance, the upper and lower limits are independently considered.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Although methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present application, preferred methods and materials are described. All publications mentioned in this specification are herein incorporated by reference to disclose and describe the methods and / or materials in connection with which the publications are cited. The citation of any reference is not an admission that it is prior art with respect to the present application.

[0027] Example 1 This embodiment is an example of the full-digital complete denture production method of the present application. Specifically as follows: I. Digital acquisition of the preliminary impression At the first visit, a three-dimensional scan is directly performed in the mouth to obtain a digital impression of the edentulous jaw. There is no need for any jaw model, although the use of a jaw model is currently the most common way of taking impressions. Conventional direct intraoral three-dimensional scanning has limitations, for example, each single-view field data needs to have curvature variation characteristics that can be used for multi-view three-dimensional data splicing. When these curvature variation characteristics are missing in the view field, splicing errors or even layering errors can occur. On the basis of previous research, the present application proposes the use of passive whole-molding mucosa multiple return folding features in combination with marking methods and intraoral and extraoral scanning techniques. It is found that the preliminary impression form that meets the clinical requirements can be obtained Figure 2 ). Different conditions of edentulous jaw scanning are added on different patients to verify and optimize the process.

[0028] First, a three-dimensional scan is performed in the patient's mouth to obtain an impression of the edentulous jaw in the upper jaw and an impression of the edentulous jaw in the lower jaw Figure 3 Then, a preformed device is prepared using the specific jaw record made by the present application Figure 10), select the appropriate size according to the size of the patient's dental arch, apply bite registration material (e.g. silicone) on the inner side of the two side edges respectively, place it in the patient's mouth, and follow the doctor's instructions to bite. Part of the bite registration material enters the other side through the hole structure, and the upper and lower alveolar ridge imprints are formed on both sides of the preformed device. Adjust the bite position as needed or add recording material such as silicone as appropriate, and integrate it into a whole. After curing, do not remove the preformed device, but directly scan the upper and lower edentulous jaw impressions and occlusal relationship Figure 4 ).

[0029] II. Making a diagnostic tray denture entity Measure the distance from the patient's natural relaxed rest position surface to the lower 1 / 3 distance and the lower vertical distance when the bite positioner is in place. Calculate the difference and give it to the technician. The technician raises the software z-axis vertical distance according to the value. The technician follows the process to register the upper and lower edentulous jaw digital impressions and occlusion, trims the edges, and redefines the occlusal relationship according to the raised distance to generate the initial impression working model. Follow the anatomical landmarks of the complete denture to digitally arrange the teeth Figure 5 ) and generate a diagnostic tray denture.

[0030] Next, leave the upper anterior aesthetic reference, midline, and occlusal plane for clinical evaluation and modification. Add a pre-designed integrated Gothic arch zebris (other known software and hardware can also be implemented) electronic motion facebow adapter Figure 6 ), which includes a recording needle, a recording plate, and an adapter that connects to the electronic motion facebow. After designing, obtain the diagnostic tray denture entity by, for example, three-dimensional printing Figure 7 ).

[0031] III. Obtaining the final impression and determining the horizontal relationship At the second visit, try on the diagnostic tray denture entity and verify or adjust the vertical distance and / or aesthetic parameters. If necessary, make slight adjustments and take a closed impression to obtain the final impression. Adjust or use flowable resin to supplement the Gothic arch recording needle to determine the final vertical distance. Take the active plasticizing edge impression and observe the anterior aesthetic area. Make appropriate adjustments, accurately mark the midline, occlusal plane, and incisor exposure, and other necessary information. Link the electronic facebow and record the patient's mandibular movement trajectory. Combine the mandibular trajectory characteristics displayed by the speech method to select the edentulous position and lock it with bite registration silicone. If necessary, use denture stabilizer. If the mandibular retention is still not good, use the denture stabilizer or use a digital mechanical Gothic arch to complete the preparation.

[0032] IV. Final denture design Make a copy of the denture, perform a complete scan of the upper and lower arches, and match the final occlusion. Trim the copy denture model using any software, remove the outer part of the border area, and reverse the normal line to obtain a working model with occlusion. Use any software with a complete denture module to design the final denture according to clinical requirements.

[0033] V. Fabricating the final denture Using the generated cutting file, the final denture is directly cut using a two-color tray. The two-color tray has a red and white boundary, especially in the red and white aesthetic area of the labial side of the anterior teeth. The traditional method is to manually polish the white resin in the base area and then use a self-curing resin to repair the gingival color, but the aesthetic effect is not ideal, especially in dentures with a thin base. The self-curing resin cannot completely cover the red and white boundary, and doctors, technicians, and patients are not satisfied. This application uses digital back cutting, and then uses a biomimetic resin molding method to solve the above problems. The specific steps include: 1. Design the back cutting of the red and white boundary part through software (the red and white parts can also be cut and then bonded), and specify the thickness of the biomimetic gingival production; 2. Use light-cured resin (such as the polymerization porcelain dyeing set of the Matsunaga company) to replace the self-curing resin for color hiding. Light-cured resin is denser than self-curing resin, has strong color hiding ability, is firm in texture, has a wide range of color options, can ensure the firmness of the gingival area, and has better color hiding effect. Even if the tray is thin, a better aesthetic effect can still be achieved. In addition, according to the need, biomimetic blood vessels are drawn; 3. To further solve the problem of color hiding resin falling off, or to make the resin more firmly bonded to the tray, self-curing resin and / or heat-curing resin are applied on the basis of light-cured resin for the purpose of biomimetic gingival production. For example, self-curing resin is used for heap molding (such as the product of the Yamaba company) and conventional self-curing in the light-cured resin area and around it. In a preferred embodiment, a simple injection molding + heat-curing resin (such as the product of the Vostech company) is used, and a method of pressure heat curing is used. The final denture obtained in this way is firm and has no tiny air bubbles. Figure 8 and Figure 9 ).

[0034] In an exemplary embodiment, the biomimetic resin molding method includes: The tray is back cut according to the designed biomimetic resin thickness, then the wax is used to restore the gingival thickness back cut during digital design, the silicon rubber is used for complex molding, the injection molding hole and overflow hole are punched, then the wax is removed, the gingival area is manually overcut and sandblasted, the overcut is to grind out some undercut and / or texture structure that cannot be back cut by equipment. Then the monomer is used to treat the bonding surface, and the light-cured resin is used for color hiding at least once, for example, 2 times, 3 times, 4 times or more, each time for half a minute, and the whole light-cured resin is brushed for 3 minutes. Next, simple injection molding is performed, and polishing is completed.

[0035] The method of the present application for digital design of the range and depth of the backfilling realizes accuracy by replacing manual operation. The use of photosensitive resin of optional color instead of self-curing resin for color blocking achieves an aesthetic effect. The treatment of the bottom layer of the backfilling surface ensures the firmness of the photosensitive resin.

[0036] Based on the personalized design scheme of the digital complete denture of the present application, customized complete dentures have been generated for the jawbone anatomical characteristics of numerous patients of different genders and ages. Key evaluation indicators show that, compared with traditional dentures, the accuracy of jaw relationship (compared with denture scanning and intraoral scanning on the jaw frame before and after denture wearing adaptation) is significantly improved, the amount of prosthetic adjustment (scanning and calculation of adjustment amount before and after denture adjustment) is significantly reduced, the edge fit and tightness of the denture (average gap ≤ 120 μm), and the clinical efficiency (increased by 60% compared with traditional processes) are all significantly higher than those of the control group; the subjective satisfaction of patients reaches 95% (VAS score), mainly covering the improvement of comfort, pronunciation clarity and aesthetics; long-term follow-up shows that the tray cracking rate is maintained, confirming the clinical advantages.

[0037] Embodiment 2 This embodiment exemplarily illustrates the structure of the segmented diagnostic tray denture used in the whole-process digital complete denture production process, which consists of a maxillary diagnostic denture and a mandibular diagnostic denture. Among them, Figure 11 the structure of the mandibular diagnostic denture is exemplarily shown, which includes a lower dentition ( Figure 11 A) and a lower tray ( Figure 11 B). Figure 11 only the main structure of the lower tray is exemplarily shown in B, and the tracing component of the lower tray is not shown. In addition, Figure 12 a side view of the lower tray in the mandibular diagnostic denture is exemplarily shown. As Figure 12 shown, the height of the highest point of the tracing needle integrally formed with the lower tray is greater than the height of the rest of the lower tray. In use, the lower dentition and the lower tray are combined (e.g., bonded).

[0038] This embodiment greatly improves the measurement of occlusal height through the creative segmented design, and at the same time improves the accuracy of the closed-mouth impression. Specifically, in the traditional design, only the Gothic arch tracing needle supports the upper and lower jaw trays, and the stress is concentrated. When taking the closed-mouth impression, uneven occlusal force easily leads to excessive local pressure and deformation of the mucosa, affecting the accuracy of the impression. The segmented design of the present embodiment resets the mandibular occlusal surface to ensure uniform distribution of occlusal force, thereby obtaining a uniform and accurate closed-mouth impression. In addition, the present embodiment also optimizes the occlusal height determination process. When testing and determining the occlusal height of the initial jaw relationship, after resetting the mandibular occlusal surface, the lower dentition occlusal surface can be directly adjusted and ground or wax can be directly shaped on the original occlusal surface, thereby greatly improving the efficiency.

[0039] While the application has been described with reference to the example embodiments thereof, it is to be understood that the application is not limited to the example embodiments disclosed. Numerous modifications or changes can be made to the example embodiments of the present application without departing from the scope or spirit of the application. The scope of the claims should be based on the claims as they are worded rather than the example embodiments described.

Claims

1. A method for fully digitally fabricating complete dentures with personalized gingiva throughout the entire process, characterized in that, Includes the following steps: (1) Obtain data on the mucosal surface morphology of the upper and lower edentulous jaws, generate a digital impression, use a specific jaw recording device to scan and obtain the preliminary jaw position relationship, and generate a diagnostic tray-type denture with anterior aesthetic parameters through digital design and virtual tooth arrangement based on the digital impression and the preliminary jaw position relationship. The diagnostic tray-type denture has a segmented structure or a non-segmented structure, and is designed with a transfer accessory with a digital Gothic arch tracing needle and tracing plate. The diagnostic tray-type denture is fabricated. (2) Try on the diagnostic tray-type denture entity and verify or adjust the vertical distance and / or aesthetic parameters. Make slight adjustments if necessary. Take a closed impression to obtain the final impression. With the assistance of an electronic motion facebow, find and determine the midline position or the patient's habitual position by using the digital Gothic arch information and the characteristics of the mandibular trajectory through the mandibular movement trajectory. Determine the horizontal jaw relationship, fix the adjusted diagnostic tray-type denture entity, and scan to obtain a digital complete denture. Further fabricate the preliminary complete denture entity. (3) Try on the preliminary complete denture body and adjust it further as needed to obtain the final complete denture; and (4) Digital backcutting is adopted, and then a biomimetic resin molding method is used to design personalized gingiva.

2. The method for fully digitally fabricating complete dentures with personalized gingiva according to claim 1, characterized in that, By passively shaping the mucosa through multiple round trips to identify its morphological characteristics, combined with different pattern marking methods and intraoral and extraoral scanning techniques, data on the mucosal surface morphology of the maxillary and mandibular edentulous jaws were obtained.

3. The method for fully digitally fabricating complete dentures with personalized gingiva according to claim 1, characterized in that, The jaw recording prefabrication device includes a main structure, side edges, fixation holes, and optional jaw support wings. The main structure includes a first surface that fits against the hard palate and a second surface opposite to the first surface. The side edges include a first side edge and a second side edge, which are respectively designed to protrude toward the first surface. Mechanical fixation holes for occlusal recording silicone rubber material are respectively provided on the lower sides of the first side edge and the second side edge.

4. The method for fully digitally fabricating complete dentures with personalized gingiva according to claim 1, characterized in that, The diagnostic tray-type denture or preliminary complete denture entity has a segmented structure, that is, the maxillary diagnostic denture and / or mandibular diagnostic denture consists of at least two segmented components, and the segmented components of the maxillary or mandibular diagnostic denture can be combined to obtain a complete maxillary or mandibular diagnostic denture.

5. The method for fully digitally fabricating complete dentures with personalized gingiva according to claim 1, characterized in that, Further steps include refining and replicating the denture model, removing the portion outside the marginal area, reversing the normal, obtaining a working model with occlusal relationships, designing and generating cutting files using complete denture software, and cutting to obtain the final denture.

6. The method for fully digitally fabricating complete dentures with personalized gingiva according to claim 5, characterized in that, Designing personalized gums involves using software to cut out a biomimetic gum space, followed by overcutting, i.e., polishing the texture and / or undercutting, then roughening the bottom surface by sandblasting, and finally restoring the biomimetic gums by simple injection molding combined with thermosetting resin after masking with light-cured resin.

7. The method for fully digital fabrication of complete dentures with personalized gingiva according to claim 5, characterized in that, The digital back-cutting process involves designing the back-cutting of the red and white boundary or cutting the red and white parts and then bonding them together using software, standardizing the thickness of the bionic gingiva fabrication, and using light-cured resin instead of self-curing resin for color masking.

8. The method for fully digitally fabricating complete dentures with personalized gingiva according to claim 7, characterized in that, The method further includes the step of applying a self-curing resin and / or a heat-curing resin for creating biomimetic gingiva on the basis of the light-cured resin.

9. The method for fully digitally fabricating complete dentures with personalized gingiva according to claim 7, characterized in that, Further steps include drawing biomimetic blood vessels.

10. A digital complete denture with personalized gingiva, characterized in that, It is prepared by the method described in any one of claims 1-9.

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