Complete denture and full-process digital complete denture manufacturing method

Abstract

The invention discloses a complete denture and a complete-process digital complete denture manufacturing method. A traditional impression is replaced by an optical impression, mechanical face arch and Gothic arch tracing is replaced by electronic motion face arch and mandibular motion track tracing, traditional jaw position recording is replaced by combining mandibular track characteristics displayed by a voice method, the technical sensitivity is lower, and jaw position relation recording is more accurate; after mouth scanning, an occlusion scheme is directly generated through software tooth pre-arrangement and an electronic face arch, the middle steps of wax pattern try-on, traditional jaw position recording and the like are omitted, digital manufacturing is adopted, manual operation is reduced, false teeth are directly output through the three-dimensional printing / cutting technology, the tedious procedures of boxing, tooth boiling, grinding and the like are omitted, the manufacturing period is greatly shortened, and the manufacturing cost is reduced. And the subsequent secondary copying or remanufacturing time and the adaptation time are 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 invention relates to the field of oral restoration technology, specifically the field of full-mouth dentures or full-mouth implant occlusal reconstruction and restoration of edentulous jaws, and more specifically to a full-mouth denture production method based on full-process digitization and the full-mouth denture obtained thereby. Background Art

[0002] If all teeth are lost and not restored in time, it will lead to chewing dysfunction, nutritional intake disorders, and even induce systemic diseases such as cardiovascular disease. Although dental implants have been widely used in the field of oral rehabilitation in recent years, due to the limitations of factors such as the patient's general condition, jaw condition, psychological factors and economic conditions, classic mucosal-supported full dentures are still an important means of reconstructing oral and maxillofacial function in edentulous patients. At present, traditional full denture restoration technology has problems such as complex operation, high number of visits, long production cycle, high dependence on the experience of doctors and technicians, and difficulty in adapting to the function after the denture is worn. There is an urgent need to solve these problems through technological innovation.

[0003] To address these issues, certain basic technological innovations and interdisciplinary integration have been carried out. The medical-grade photocurable resin developed by Germany's EnvisionTEC supports 25μm layer thickness printing, and combined with topological optimization structural design, it reduces the weight of dentures by 20% while maintaining high strength. Japan focuses on biomechanical research. Tokyo Medical and Dental University optimizes the denture base morphology through finite element analysis, reducing the peak mucosal stress by 35%, and combines AI algorithms to achieve personalized aesthetic design. In terms of standardization, the European Union has issued the "Clinical Operation Guidelines for Digital Dentures", which standardizes data acquisition accuracy (requiring scanning errors of ≤30μm) and software compatibility standards to promote cross-border data interoperability. It is worth noting that the ultra-high-speed photocuring printer launched by Israel's Nexa3D company has been commercialized, and its distributed manufacturing model is reshaping the global denture supply chain.

[0004] my country has also conducted extensive research in the field of digital full dentures. For example, institutions such as Peking University have pioneered the application of 3D printing technology in the production of diagnostic dentures. By combining digital scanning with modified traditional jaw relationship records, they have improved impression accuracy and the efficiency of jaw relationship determination. The 3D digital printing technology developed by Zhang Zhenyu's team utilizes a high-precision intraoral scanner (with an accuracy of up to 20μm) and AI-assisted design software. In terms of material research and development, domestic companies such as Airtronic have introduced biocompatible resins and zirconia ceramic materials, combined with topology optimization algorithms, to increase the flexural strength of dentures by over 30%.

[0005] The information in the background technology is only intended to illustrate the general background of the invention and should not be regarded as an admission or any form of suggestion that this information constitutes the prior art known to a person skilled in the art. Summary of the Invention

[0006] To address at least some of the technical issues in the prior art, the present invention provides a fully digitalized method for producing complete dentures. This method achieves full digitization of the impression and production processes, completely replacing traditional methods of producing complete dentures. Specifically, the present invention includes the following:

[0007] A first aspect of the present invention provides a fully digitalized method for producing complete dentures, comprising the following steps: (1) Obtaining data on the mucosal surface morphology of the upper and lower edentulous jaws, generating a digital impression, scanning with a self-designed jaw record preparation device to obtain a preliminary jaw position relationship, generating a diagnostic tray-type denture with anterior tooth aesthetic parameters through digital design and virtual tooth arrangement based on the digital impression and the preliminary jaw position relationship, wherein the diagnostic tray-type denture entity is a segmented structure or a non-segmented structure, and designing an adapter accessory with a digital Gothic arch tracing needle and tracing board to produce the diagnostic tray-type denture entity; (2) Trying on the diagnostic tray denture entity, whether it is segmented or non-segmented, and verifying or adjusting the vertical distance and / or aesthetic parameters, making slight adjustments if necessary, taking a closed-mouth impression to obtain a final impression, using the Gothic bow tracing needle to tracing the mandibular movement trajectory with the assistance of an electronic motion face bow, and combining the mandibular trajectory characteristics displayed by, for example, the phonetic method, to determine the horizontal jaw relationship, using a denture fixative to assist in the retention of the diagnostic tray denture entity when necessary, fixing the adjusted diagnostic tray denture entity, and scanning to obtain a final accurate digital impression and an accurate digital jaw relationship, further accurately adjusting the virtual tooth arrangement data based on these data, and finally obtaining a digital full-mouth denture for cutting, and further manufacturing the full-mouth denture entity; and (3) Try on the preliminary full denture entity and make minor adjustments according to the situation to obtain the final full denture.

[0008] In certain embodiments, the diagnostic tray-type denture or preliminary complete denture entity of the present invention has a non-segmented structure or an integrally formed structure, that is, it comprises an integrally formed maxillary diagnostic denture and an integrally formed mandibular diagnostic denture. Exemplarily, the maxillary diagnostic denture comprises an upper dentition, an upper tray and a Gothic arch plate. Exemplarily, the mandibular 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 mandibular diagnostic denture comprises an incomplete dentition or a tooth cusp portion missing 1-5 mm, such as 2-3 mm, or does not comprise a dentition at all, thereby making the height of the tracing needle higher than the height of the tray.

[0009] In certain 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 and / or mandibular diagnostic denture is composed of at least two segmented components. The segmented components of the maxillary or mandibular diagnostic denture can preferably be combined to form a complete maxillary or mandibular diagnostic denture. The segmented components can be assembled using any known method, such as gluing or snap-fitting. For example, the segmented components can be bonded together using adhesives, wax, or bite-registration materials. Furthermore, polymer materials, such as 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 reposition the contact surfaces during occlusion, providing stable support for occlusion, facilitating bite height testing, and significantly improving the accuracy of closed-mouth impressions. When performing Gothic bow exercises, the segmented components (e.g., the dentition component) are removed to ensure free movement of the maxillary diagnostic denture during movements, such as protrusion and lateral movement.

[0010] In certain embodiments, the mandibular diagnostic denture or preliminary complete denture of the present invention has a segmented structure, for example, comprising a lower tray assembly and a lower dentition assembly, 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 to ensure 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 tracing needle contacts the tracing plate when the preliminary complete denture is tried on, there is no contact between the upper and lower dentitions. Preferably, the lower tray assembly includes a tray and a tracing needle assembly integrally formed therewith.

[0011] In certain embodiments, the maxillary diagnostic denture or preliminary complete denture entity of the present invention has a segmented structure, for example, including an upper tray assembly and an upper dentition assembly, and the two assemblies can be combined to obtain 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 upper dentition assembly is removed and the tracing needle contacts the tracing plate in the upper tray assembly, the dentition of the lower diagnostic denture and the maxillary diagnostic denture do not contact or have a gap, or as long as when the preliminary complete denture entity is tried on and the tracing needle contacts the tracing plate, the upper and lower dentitions do not contact. Preferably, the upper tray assembly includes a tray and a tracing plate integrally formed therewith.

[0012] In certain embodiments, according to the full-process digital complete denture production method described in the first aspect, the data of the mucosal surface morphology of the upper and lower edentulous jaws are obtained by passively shaping the mucosal morphological characteristics multiple times, combined with a combination of different pattern marking methods and intraoral and extraoral scanning technologies.

[0013] In certain embodiments, according to the fully digitalized complete denture fabrication method of the first aspect, the independently designed jaw recording prefabricated device comprises a main structure 10 (including a first surface 11 and a second surface 12), a lateral edge protruding from the first surface 11, a fixing hole 30, and an optional jaw support wing 40. The first surface 11 is designed to mate with the upper palate, and the second surface 12 is the opposite side of the first surface 11, i.e., the side that contacts the tongue after the prefabricated device is placed in the mouth. The lateral edges include a first lateral edge 21 and a second lateral edge 22, located on the left and right sides of the prefabricated device, respectively. The lateral edges are designed to mate with the alveolar ridge. Impression material fixing holes 30 are provided on the undersides of the first and second lateral edges 21 and 22, respectively. The fixing holes 30 have a hole structure that extends through the first and second surfaces 11 and 12 of the main body, and a protrusion 31 on the second surface 12 has a groove structure that mates with the alveolar ridge of the mandible. The jaw support 40 of the present invention includes a first jaw support wing and a second jaw support wing, which are respectively located on the left and right sides. Preferably, they are respectively connected to the side edges or formed as one piece. Preferably, the ends of the first jaw support wing and the second jaw support wing are close to each other, but cannot be connected, and need to maintain a certain distance to facilitate intraoral scanning. Preferably, based on the statistical data of the dental arch size of the Chinese, different models of jaw records are designed to make prefabricated devices, such as large, medium and small models or more models, to suit different patients. The structures between different models can be designed to be the same, and the only difference is the size. The size usually includes the front-to-back length or the left-to-right width of the prefabricated device.

[0014] In certain embodiments, according to the full-process digital full denture production method described in the first aspect, adjustment is performed when trying on the segmented or non-segmented diagnostic tray-type denture entity, an active shaping edge impression is taken, and the aesthetic area of ​​the anterior teeth is observed, appropriate adjustments are made, and the midline, posterior plane and incisor exposure information are accurately marked.

[0015] In certain embodiments, the full-process digital full denture production method according to the first aspect further includes connecting an electronic motion face bow to the diagnostic tray-type denture entity through an adapter accessory, tracing the patient's mandibular movement trajectory (software and hardware from known companies can be used, and the figures of the present invention are only examples), and using the digital Gothic bow information to find and determine the central position, or the patient's habitual position, which can be stably reproduced, improving the limitations of traditional production methods that require empirical determination, and selecting a recommended position.

[0016] In certain embodiments, according to the full-process digital full denture production method described in the first aspect, the scanning in step (2) includes scanning the adjusted upper and lower jaw diagnostic tray-type denture entities and matching the final occlusal relationship.

[0017] In certain embodiments, the full-process digital full denture production method according to the first aspect further includes trimming the copied denture model, cutting off the part outside the edge area, reversing the normal line, obtaining a working model with an occlusal relationship, using full denture software design to generate a cutting file, and cutting to obtain the final denture.

[0018] In certain embodiments, the full-process digital complete denture production method according to the first aspect further includes a step of designing personalized gums.

[0019] In certain embodiments, according to the full-process digital full denture production method described in the first aspect, the design of personalized gums includes using software to digitally cut back the bionic gum space, and then performing overcutting, that is, grinding the texture and / or concave, and then roughening the bottom surface by sandblasting. After masking with light-curing resin, simple injection molding combined with thermosetting resin is performed to restore the bionic gums.

[0020] The second aspect of the present invention provides a complete denture, which is manufactured by the method described in the first aspect.

[0021] The fully digital impression process of this application can completely replace traditional impression taking, obtain accurate data through intraoral scanning in one time, avoid the repeated impression taking, casting and model trimming of traditional impressions, save 1-2 consultation times, and greatly improve the comfort of patient experience. In addition, compared with BPS technology and functional easy-to-adapt full denture technology, optical impressions replace traditional impressions, and electronic motion face bows replace mechanical face bows + Gothic bow tracings. The technology is less sensitive and the jaw relationship record is more accurate. After the oral scan, the software pre-arranges the teeth and the electronic face bow directly generates the occlusion plan, eliminating intermediate steps such as wax-type trial wearing and jaw position recording. In addition, the present invention uses digital manufacturing to reduce manual operations. 3D printing / cutting technology directly outputs dentures, eliminating tedious processes such as boxing, boiling teeth, and polishing, and the production cycle is shortened 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, reducing the number of clinical adjustments. In the end, only one adjustment is required to complete the tooth wearing.

[0022] In summary, the digital technology of this application transforms the experience-based manual operations in traditional technologies into efficient and controllable standardized processes through data precision, process automation and intelligent decision-making, improving overall efficiency by more than 50%. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A flowchart of an exemplary full-process digital fabrication method for a complete denture; Figure 2 Exemplary schemes for obtaining digital preliminary impressions in different combinations; Figure 3Example of direct oral scan results of upper and lower jaws; Figure 4 Example of occlusal relationship direct scan results; Figure 5 An exemplary digital pre-arrangement process; Figure 6 An exemplary non-segmented diagnostic tray-type denture is designed, which includes an integrated Gothic bow + electronic motion face bow + adapter accessories, wherein software and hardware from known companies can be used, and the figure is only an example; Figure 7 Printed exemplary non-segmented diagnostic tray-type denture entity; Figure 8 Example gingival preparation process. a. Result of photosensitive resin curing and masking after cutting back; b. Result of biomimetic color light curing; c. Result of simple injection molding and thermosetting; d. Result of grinding and high polishing; Figure 9 The results of the exemplary gingiva produced showed that the conventional self-curing group had poor edge bonding, bubbles, and poor surface finish; the injection-molded thermosetting resin with pressurized heat polymerization had better bonding, almost no bubbles, and a better surface finish; Figure 10 Exemplary jaw record making prefabricated device structure; Figure 11 The structure of a segmented diagnostic tray denture (mandibular diagnostic denture) according to the present invention is shown as an example, which includes the lower dentition ( Figure 11 A) and pallet ( Figure 11 B, not showing the tracing needle assembly); Figure 12 The side view of the structure of a segmented diagnostic tray denture (lower tray assembly) of the present invention is shown as an example. As can be seen from the figure, the height of the tracing needle in the lower tray assembly is greater than the height of the tray. DETAILED DESCRIPTION

[0024] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as limiting the present invention, but rather as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0025] It should be understood that the terms described in the present invention are only for describing particular embodiments and are not intended to limit the present invention. In addition, for numerical ranges in the present invention, it should be understood that the upper and lower limits of the ranges and each intermediate value therebetween are specifically disclosed. Each smaller range between any stated value or intermediate value within a stated range and any other stated value or intermediate value within the stated range is also included in the present invention. The upper and lower limits of these smaller ranges may be independently included or excluded within the scope.

[0026] Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the invention belongs. Although the present invention describes only preferred methods and materials, any methods and materials similar or equivalent to those described herein may also be used in the implementation or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials related to the documents. In the event of any conflict with any incorporated document, the content of this specification shall prevail.

[0027] Example 1 This embodiment is an example of the present invention's fully digitalized method for producing complete dentures. The details are as follows: 1. Digital Acquisition of Preliminary Impressions During the first visit, a 3D scan is performed directly in the mouth to obtain a digital impression of the edentulous jaw, without the need for any dental models, although the use of dental models is currently the most common way to make impressions. Conventional direct intraoral 3D scanning has limitations. For example, each single-field data is required to have curvature change features that can be used for splicing of multi-field 3D data. When these curvature change features are missing in the field of view, splicing errors or even misalignment are likely to occur. Based on previous research, this application proposes the passive shaping of the mucosa's multiple foldback morphological features, combined with the marking method and the combined use of intraoral and extraoral scanning technology, and found that a preliminary impression morphology that meets clinical requirements can be obtained ( Figure 2 ). The process was validated and optimized by adding edentulous jaw scans with different conditions on different patients.

[0028] First, a 3D scan was performed inside the patient's mouth to obtain an impression of the maxillary edentulous jaw and an impression of the mandibular edentulous jaw ( Figure 3 Then, a prefabricated device is prepared using the specific jaw record made by the present invention ( Figure 10 ), select the appropriate model according to the size of the patient's dental arch, apply bite registration materials (such as silicone rubber) on the inner side of its two side edges, place it in the patient's mouth, and occlude according to the doctor's instructions. Part of the bite registration material enters the other side through the hole structure and forms an imprint of the upper and lower alveolar ridges on both sides of the prefabricated device. Adjust the bite position as needed or add appropriate recording materials, such as silicone rubber, which can be molded in one piece. After curing, the upper and lower edentulous jaw impressions and occlusal relationship scans are performed directly without removing the prefabricated device ( Figure 4 ).

[0029] 2. Making a Diagnostic Tray Denture The fixed point measurement is made when the patient is naturally relaxed and resting, and the fixed point distance is measured when the patient bites the spacer at the lower 1 / 3 of the surface. The difference is calculated and given to the technician, who then raises the vertical distance of the z-axis of the software according to the value. The technician follows the process to perform digital impression registration and occlusion of the upper and lower edentulous jaws, trims the edges, and readjusts the occlusion relationship according to the raised distance to generate the initial working model. According to the anatomical landmarks of the complete denture, digital pre-arrangement of teeth is performed ( Figure 5 ), generate diagnostic tray dentures.

[0030] Next, the aesthetic reference, midline, and face plane of the anterior teeth are left for clinical evaluation and modification. Add the pre-designed integrated Gothic arch zebris (other known software and hardware can also be implemented) electronic motion face bow adapter ( Figure 6 ), wherein the tracing needle, tracing board and adapter accessories of the integrated Gothic bow are all integrated with the diagnostic tray denture, and the adapter accessories include a connector for connecting to the electronic motion face bow. After the design is completed, the diagnostic tray denture entity is obtained by, for example, 3D printing ( Figure 7 ).

[0031] 3. Obtain the final impression and determine the horizontal relationship During the second visit, the diagnostic tray-type denture is tried in, and the vertical distance and / or aesthetic parameters are verified or adjusted. Minor adjustments are made if necessary, and a closed-mouth impression is taken to obtain the final impression. The Gothic arch tracing needle is adjusted or filled with flowable resin to determine the final vertical distance. An active shaping edge impression is taken, and the anterior aesthetic zone is observed and adjusted as appropriate. The necessary information, such as the midline, apex plane, and incisor exposure, is precisely marked. An electronic facebow is connected to the patient's mandibular trajectory. Combined with the mandibular trajectory characteristics displayed by the phonetic method, the apex position is selected and locked with bite-register silicone rubber before being transferred to a technician. Denture adhesive can be used as needed. If mandibular retention is still poor, denture adhesive can be used or a digital mechanical Gothic arch can be used to complete the fabrication.

[0032] 4. Final denture design Create a copy denture order, perform scans, and complete the upper and lower diagnostic dentures, matching the final occlusion. Use any software to trim the copy denture model, remove the outer edge area, and reverse the normals 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] 5. Make the final denture entity Using the generated cutting file, the final denture is directly cut using a two-color disc. The two-color disc has a red-white dividing line, especially in the red-white aesthetic area on the labial side of the anterior teeth. The traditional method is to manually polish the white resin of the base and then use gum-colored self-curing resin to repair it, but the aesthetic effect is not ideal, especially on dentures with relatively thin bases. The self-curing resin cannot completely cover the red-white dividing line, and doctors, technicians and patients are not satisfied. This application uses digital back-cutting and then uses bionic resin modeling to solve the above problems. The specific steps include: 1. Use software design to cut back the red and white dividing part (you can also cut the red and white parts and then bond them together) to standardize the thickness of the bionic gingiva; 2. Use light-curing resin (such as Songfeng's polymer porcelain staining kit) instead of self-curing resin for color shading. Light-curing resin is denser than self-curing resin, has stronger color shading ability, a solid texture, and a full range of colors to choose from. It can ensure the firmness of the gum area and has a better color shading effect. Even if the tray is relatively thin, it can still achieve a better aesthetic effect. In addition, bionic bloodshot can be drawn as needed; 3. To further solve the problem of masking resin falling off, or to make the resin more firmly bonded to the tray, a self-curing resin and / or a thermosetting resin for curing bionic gums are applied on the basis of the light-curing resin. For example, a self-curing resin is used to perform molding (such as the product of Shanba Company) and conventional self-curing in the area and surrounding of the light-curing resin. In a preferred embodiment, a simple injection molding + thermosetting resin (such as the product of Wotes Company) is used, and a pressure heat curing method is used. The final denture thus obtained is firm and does not have any tiny bubbles ( Figure 8 and Figure 9 ).

[0034] In an exemplary embodiment, the biomimetic resin molding method includes: The tray is cut back according to the designed bionic resin thickness, and then wax is used to restore the gum thickness cut back during digital design. A silicone rubber mold is used to make injection holes and overflow holes. The wax is then removed, and the gum area is manually overcut and sandblasted. Overcutting is to grind out some undercuts and / or texture structures that cannot be cut back by some equipment. The bonding surface is then treated with a monomer and light-cured resin is used for color masking at least once, for example, 2 times, 3 times, 4 times or more, each time for half a minute of light curing, and the entire body is brushed and light-cured for 3 minutes. Next, simple injection molding is performed and polishing is completed.

[0035] This application's digital design of the cutback range and depth replaces manual labor, ensuring accuracy. Using color-selectable photosensitive resin instead of self-curing resin for masking achieves an aesthetically pleasing effect. The treatment of the bottom layer of the cutback surface ensures the durability of the photosensitive resin.

[0036] Based on the personalized design scheme of digital full dentures presented in this invention, customized full dentures have been generated clinically for the jaw anatomical characteristics of numerous patients of different genders and ages. Key evaluation indicators show that compared with traditional dentures, jaw relationship accuracy (using scans of the denture on the mandibular frame and intraoral scans before and after denture adaptation) is significantly improved, the amount of restoration adjustment (calculated from scans before and after denture adjustment) is significantly reduced, and the denture edge adaptability and tightness (average gap ≤120μm) and clinical efficiency (60% higher than traditional processes) are significantly higher than those of the control group. Patient subjective satisfaction reached 95% (VAS score), mainly focusing on comfort, pronunciation clarity, and improved aesthetics. Long-term follow-up showed no maintenance of tray fracture rate, confirming its clinical advantages.

[0037] Example 2 This embodiment exemplifies the structure of a segmented diagnostic tray denture used in the full-process digital full denture production process, which consists of an upper jaw diagnostic denture and a lower jaw diagnostic denture. Figure 11 The structure of the mandibular diagnostic denture is shown as an example, which includes the lower dentition ( Figure 11 A) and lower tray ( Figure 11 B). Figure 11 B only shows the main structure of the lower tray, and does not show the tracing components of the lower tray. Figure 12 The side view of the lower tray of the mandibular diagnostic denture is shown as an example. Figure 12 As shown, the highest point of the tracing needle integrally formed with the lower tray is greater than the height of the remaining portion of the lower tray. When in use, the lower dentition and the lower tray are combined (eg, bonded).

[0038] This embodiment greatly improves the measurement of occlusal height through a creative segmented design, while also improving the accuracy of closed-mouth impression making. Specifically, in the traditional design, the upper and lower mandibular supports are supported only by the Gothic bow tracing needle, which results in a highly concentrated force. When taking a closed-mouth impression, uneven bite force can easily lead to excessive local pressure and mucosal deformation, affecting the accuracy of the impression. The segmented design of this embodiment ensures that the bite force is evenly distributed by resetting the mandibular occlusal surface, thereby obtaining a uniform and accurate closed-mouth impression of the tissue surface. In addition, this embodiment also optimizes the process of determining the occlusal height. When testing and determining the occlusal height of the initial jaw relationship, after resetting the mandibular occlusal surface, the occlusal surface of the lower dentition can be directly adjusted or wax can be added directly to the original occlusal surface to shape the shape, thereby greatly improving efficiency.

[0039] Although the present invention has been described with reference to exemplary embodiments, it should be understood that the invention is not limited to the disclosed exemplary embodiments. Various modifications and variations may be made to the exemplary embodiments of the present specification without departing from the scope or spirit of the present invention. The scope of the claims is to be given the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.

Claims

1. A fully digitalized method for producing complete dentures, characterized in that: The following steps are involved: (1) Obtaining data on the mucosal surface morphology of the upper and lower edentulous jaws, generating a digital impression, using a specific jaw record to prepare a prefabricated device to scan and obtain a preliminary jaw relationship, and generating a diagnostic tray-type denture with anterior tooth aesthetic parameters through digital design and virtual tooth arrangement based on the digital impression and the preliminary jaw relationship, wherein the diagnostic tray-type denture entity is a segmented structure or a non-segmented structure, and an adapter accessory with a digital Gothic arch tracing needle and tracing board is designed to produce the diagnostic tray-type denture entity; (2) Try on the diagnostic tray denture entity and verify or adjust the vertical distance and / or aesthetic parameters, make slight adjustments if necessary, take a closed-mouth impression to obtain the final impression, use the digital Gothic arch information and the mandibular trajectory characteristics with the assistance of an electronic motion face bow to find and determine the central position or the patient's habitual position, determine the horizontal jaw position relationship, fix the adjusted diagnostic tray denture entity, and scan to obtain a digital full denture, and further produce a preliminary full denture entity; and (3) Try on the preliminary full denture entity and make further adjustments according to the situation to obtain the final full denture.

2. The full-process digital complete denture production method according to claim 1, characterized in that: The data of the mucosal surface morphology of the upper and lower edentulous jaws were obtained by passively shaping the mucosal morphological characteristics multiple times, combining different pattern marking methods with intraoral and extraoral scanning technologies.

3. The full-process digital denture production method according to claim 1, characterized in that: The jaw recording prefabricated device includes a main structure, side edges, fixing holes and optional jaw support wings, wherein the main structure includes a first surface that fits the upper palate and a second surface opposite to the first surface, the side edges include a first side edge and a second side edge, and are respectively designed to protrude toward the first surface, and the lower sides of the first side edge and the second side edge are respectively provided with mechanical fixing holes for the occlusal recording silicone rubber material.

4. The full-process digital complete denture production method according to claim 1, characterized in that: The diagnostic tray-type denture or preliminary full denture entity has a segmented structure, that is, the maxillary diagnostic denture and / or the mandibular diagnostic denture is composed of at least two segmented components, and the segmented components of the maxillary diagnostic denture or the mandibular diagnostic denture can be combined to obtain a complete maxillary or mandibular diagnostic denture.

5. The full-process digital complete denture production method according to claim 1, characterized in that: When trying on the diagnostic tray denture entity, adjustments were made, an active shaping edge impression was taken, and the anterior aesthetic area was observed. Appropriate adjustments were made, and the midline, posterior plane, and incisor exposure information were accurately marked.

6. The full-process digital complete denture production method according to claim 1, characterized in that: It further includes connecting an electronic motion face bow to the diagnostic tray-type denture entity through the adapter accessory, tracing the patient's mandibular movement trajectory, combining the mandibular trajectory characteristics displayed by the phonetic method, selecting a stable and reproducible construction position, and optionally, further using a denture fixative to assist in the retention of the diagnostic tray-type denture entity.

7. The full-process digital complete denture production method according to claim 1, characterized in that: The scanning in step (2) includes scanning the adjusted maxillary and mandibular diagnostic tray denture entities and matching the final occlusal relationship.

8. The full-process digital complete denture production method according to claim 1, characterized in that: The method further includes trimming the duplicate denture model, cutting off the portion outside the edge area, reversing the normal line, obtaining a working model with an occlusal relationship, generating a cutting file using full denture software design, and cutting to obtain the final denture.

9. The full-process digital complete denture production method according to claim 1, characterized in that: The step of further designing personalized gums preferably includes designing personalized gums including using software to back-cut out the bionic gum space, then performing overcutting, that is, grinding the texture and / or concave, and then roughening the bottom surface by sandblasting. After masking with light-curing resin, simple injection molding combined with thermosetting resin is performed to restore the bionic gums.

10. A digital complete denture, characterized in that: It is prepared by the method according to any one of claims 1 to 9.

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