Complete denture and complete digitalized complete denture manufacturing method

Abstract

The application discloses a complete denture and a complete-process digital complete denture manufacturing method. The application replaces a traditional impression with an optical impression, replaces a mechanical face bow and a Gothic arch tracing with an electronic face bow and a mandibular movement trajectory tracing, and replaces a traditional jaw position recording with a mandibular trajectory feature displayed by a speech method, so that the technical sensitivity is lower, the jaw position recording is more accurate, and an occlusion scheme is directly generated after software pre-dental alignment and electronic face bow after mouth scanning, so that intermediate steps such as wax trial fitting and traditional jaw position recording are omitted. In addition, the application adopts digital manufacturing to reduce manual operation, three-dimensional printing / cutting technology is directly used to output a denture, and complicated processes such as boxing, boiling, and grinding are omitted, so that the manufacturing period is greatly shortened, the secondary copying or remanufacturing time and the adaptation time are greatly shortened, and a digital solution is provided for complete implant occlusion reconstruction of a jaw position, and the development and integration of digital data are more beneficial.

Description

Technical Field

[0001] This invention relates to the field of oral prosthetics, specifically to the field of complete dentures or complete implant occlusal reconstruction and restoration for edentulous jaws, and more specifically to a complete denture fabrication method based on a fully digital process and the complete dentures obtained therefrom. Background Technology

[0002] If all teeth are lost and not replaced in time, it can lead to chewing dysfunction, nutritional deficiencies, and even systemic diseases such as cardiovascular disease. Although dental implants have been widely used in the field of prosthodontics in recent years, the classic mucosa-supported complete denture remains an important means of reconstructing oral and maxillofacial function for edentulous patients due to limitations such as the patient's overall health, jawbone condition, psychological factors, and economic situation. Currently, traditional complete denture restoration techniques suffer from problems such as complex procedures, multiple visits, long fabrication cycles, high dependence on the experience of doctors and technicians, and difficulty in adapting to the function after denture placement. These problems urgently need to be addressed through technological innovation.

[0003] To address these issues, some fundamental technological innovations and interdisciplinary integration have been undertaken. EnvisionTEC in Germany has developed medical-grade UV-curable resin that supports 25μm layer thickness printing, combined with topology-optimized structural design, reducing denture weight by 20% while maintaining high strength. Japan focuses on biomechanical research; Tokyo Medical and Dental University has optimized denture base morphology through finite element analysis, reducing peak mucosal stress by 35%, and combining this with AI algorithms to achieve personalized aesthetic design. Regarding standardization, the European Union has published the "Guidelines for Clinical Operation of Digital Dentures," standardizing data acquisition accuracy (requiring scanning error ≤30μm) and software compatibility standards, promoting cross-border data exchange. Notably, the ultra-high-speed UV-curable printer launched by Israel's Nexa3D has achieved commercial application, 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 complete dentures. For example, institutions such as Peking University have pioneered the application of 3D printing technology to the fabrication of diagnostic dentures. By combining digital scanning with improved traditional jaw relationship recording, they have enhanced the accuracy of impressions and the efficiency of determining jaw relationships. The 3D digital printing technology developed by Zhang Zhenyu's team utilizes a high-precision intraoral scanner (with an accuracy of 20μm) and AI-aided design software. In terms of materials research, domestic companies such as Aierchuang have launched biocompatible resins and zirconia ceramic materials, combined with topology optimization algorithms, which have increased the fracture strength of dentures by more than 30%.

[0005] The information in the background section is merely intended to illustrate the general background of the invention and should not be construed as an admission or implication in any way that such information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] To address at least some of the technical problems in existing technologies, this invention provides a fully digitalized method for fabricating complete dentures. This invention achieves full digitalization of the impression taking and fabrication processes, and can completely replace traditional methods for fabricating complete dentures. Specifically, this invention includes the following:

[0007] A first aspect of the present invention provides a fully digitalized method for fabricating complete dentures, comprising the following steps:

[0008] (1) Obtain data on the mucosal surface morphology of the upper and lower edentulous jaws, generate a digital impression, scan the preliminary jaw position relationship using a self-designed jaw recording and prefabrication device, 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 entity is a segmented structure or a non-segmented structure, and design an adapter with a digital Gothic arch tracing needle and tracing plate to fabricate the diagnostic tray-type denture entity.

[0009] (2) Try on the diagnostic tray-type denture entity, whether segmented or non-segmented, and verify or adjust the vertical distance and / or aesthetic parameters. Make minor adjustments if necessary. Take a closed-mouth impression to obtain the final impression. Under the assistance of an electronic motion facebow, trace the mandibular movement trajectory using a Gothic arch tracing needle. Combine this with mandibular trajectory features displayed by, for example, the speech method, to determine the horizontal jaw position relationship. If necessary, use denture stabilizer to assist in the retention of the diagnostic tray-type denture entity. Fix the adjusted diagnostic tray-type denture entity and scan to obtain the final accurate digital impression and precise digital jaw position relationship. Based on these data, further refine the virtual tooth arrangement data to obtain the final digital complete denture for cutting. Further fabricate the complete denture entity; and

[0010] (3) Try on the preliminary complete denture body and make minor adjustments as needed to obtain the final complete denture.

[0011] In some embodiments, the diagnostic tray-type denture or preliminary complete denture entity of the present invention has a non-segmented or integral structure, i.e., it comprises an integrally formed maxillary diagnostic denture and an integrally formed mandibular diagnostic denture. Exemplarily, the maxillary diagnostic denture includes the upper dentition, an upper tray, and a Gothic arch plate. Exemplarily, the mandibular diagnostic denture includes a lower tray and a Gothic arch tracing needle, preferably with the tracing needle higher than the tray height. Also preferably, the mandibular diagnostic denture includes an incomplete dentition or a cusp portion missing 1-5 mm, for example, 2-3 mm, or no dentition at all, thereby making the tracing needle higher than the tray height.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] In some implementations, according to the fully digital complete denture fabrication method described in the first aspect, data on the mucosal surface morphology of the maxillary and mandibular edentulous jaws are obtained by passively shaping the mucosal morphology through multiple round trips, combined with different pattern marking methods and intraoral and extraoral scanning techniques.

[0016] In some embodiments, according to the fully digital complete denture fabrication method described in the first aspect, the self-designed jaw recording and prefabrication device includes a main structure 10 (including a first surface 11 and a second surface 12), a side 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 fit against the hard palate, and the second surface 12 is the opposite surface of the first surface 11, i.e., the surface that can contact the tongue after the prefabrication device is placed in the mouth. The side edge includes a first side edge 21 and a second side edge 22, located on the left and right sides of the prefabrication device respectively, and the side edge is designed to fit against the alveolar ridge. Fixing holes 30 for impression material are respectively provided on the lower sides of the first side edge 21 and the second side edge 22. The fixing hole 30 has a hole structure penetrating the first surface 11 and the second surface 12 of the main structure, and has a protrusion 31 on the second surface 12, the protrusion 31 having a groove structure that fits against 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 located on the left and right sides respectively. Preferably, they are connected to the side edges or integrally formed. Preferably, the ends of the first jaw support wing and the second jaw support wing are close to each other but not connected, and a certain distance must be maintained to facilitate intraoral scanning. Preferably, based on statistical data on the size of dental arches of Chinese people, different models of jaw recording and acquisition prefabrication devices are designed, such as three or more models (large, medium, and small), to suit different patients. The structures of different models can be designed to be the same, with the only difference being the size. The size usually includes the front-to-back length or left-to-right width of the prefabrication device.

[0017] In some implementations, according to the fully digital complete denture fabrication method described in the first aspect, adjustments are made during the trial wearing of the segmented or non-segmented diagnostic tray-type denture, an active shaping marginal impression is taken, and the anterior aesthetic zone is observed and appropriate adjustments are made, and the midline, sigmoid plane and incisor exposure information are accurately marked.

[0018] In some implementations, the fully digital complete denture fabrication method according to the first aspect further includes connecting an electronic motion facebow to the diagnostic tray-type denture entity via an adapter, recording the patient's mandibular movement trajectory (using known company hardware and software, the figures of this invention are merely examples), using digital Gothic arch information to find and determine the centric position, or the patient's habitual position, which can be stably reproduced, thus improving the limitation of traditional fabrication methods that require empirical determination, and selecting the occlusal position.

[0019] In some implementations, according to the fully digital complete denture fabrication method described in the first aspect, the scanning in step (2) includes scanning the adjusted maxillary and mandibular diagnostic tray-type denture entities and matching the final occlusal relationship.

[0020] In some implementations, the fully digital complete denture fabrication method according to the first aspect further includes modifying 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.

[0021] In some implementations, the fully digital complete denture fabrication method described in the first aspect further includes a step of designing personalized gingiva.

[0022] In some implementations, according to the fully digital complete denture fabrication method described in the first aspect, the design of personalized gingiva includes digitally back-cutting a bionic gingival space using software, followed by overcutting, i.e., grinding texture and / or undercutting, then roughening the bottom surface by sandblasting, and after masking with light-cured resin, performing simple injection molding combined with thermosetting resin to restore the bionic gingiva.

[0023] In a second aspect, the present invention provides a complete denture, which is manufactured by the method described in the first aspect.

[0024] This application's fully digital impression process completely replaces traditional impression taking. A single intraoral scan acquires precise data, avoiding the repeated impression taking, pouring, and model trimming required by traditional methods, saving 1-2 visits and significantly improving patient comfort. Furthermore, compared to BPS technology and functionally adaptable complete dentures, using optical impressions instead of traditional ones and electronic motion facebows instead of mechanical facebows and Gothic arch tracing results in lower technical sensitivity and more accurate jaw position recording. After intraoral scanning, software pre-arranges teeth and the electronic facebow directly generate an occlusal plan, eliminating intermediate steps such as wax model fitting and jaw position recording. Moreover, this invention utilizes digital manufacturing to reduce manual operations. 3D printing / cutting technology directly outputs dentures, eliminating tedious processes such as casing, boiling, and polishing, shortening the production cycle from 4-6 weeks to 1-3 days. AI-assisted decision-making reduces adjustments, and AI aesthetic design and occlusal simulation proactively avoid common problems, reducing the number of clinical adjustments. Ultimately, denture fitting requires only one adjustment.

[0025] In summary, the digital technology of this application transforms the experience-based manual operations of traditional technologies into efficient and controllable standardized processes through data precision, process automation, and intelligent decision-making, thereby improving overall efficiency by more than 50%. Attached Figure Description

[0026] Figure 1 A flowchart illustrating an exemplary fully digital fabrication method for complete dentures;

[0027] Figure 2 Exemplary solutions for obtaining preliminary digital impressions using different combinations;

[0028] Figure 3 Exemplary direct scan results of the upper and lower jaws;

[0029] Figure 4 Exemplary occlusal relationship direct scan results;

[0030] Figure 5 Exemplary digital pre-alignment process;

[0031] Figure 6 An exemplary non-segmented diagnostic tray denture design includes an integrated Gothic bow + electronically operated face bow + adapter accessories, wherein known company hardware and software can be used; the figure is merely an example.

[0032] Figure 7 An exemplary non-segmented diagnostic tray-type denture entity printed;

[0033] Figure 8 Exemplary gingival preparation process. a. Masking result after photosensitive resin curing following backcutting; b. Biomimetic effect color light curing result; c. Simplified injection molding thermosetting result; d. High-level polishing result;

[0034] Figure 9 Exemplary gingival results: The conventional self-curing group showed poor marginal bonding, air bubbles, and poor surface smoothness; the injection-molded thermo-curing resin showed better bonding under pressure and thermal polymerization, with almost no air bubbles and good surface smoothness.

[0035] Figure 10 Structure of an exemplary jaw recording prefabrication device;

[0036] Figure 11 An exemplary illustration shows the structure of a segmented diagnostic tray-type denture (mandibular diagnostic denture) according to the present invention, which includes the lower dentition ( Figure 11 A) and pallet ( Figure 11 (B, not shown, tracing needle assembly).

[0037] Figure 12 An exemplary side view of the structure (lower tray assembly) of a segmented diagnostic tray-type denture according to the present invention is shown. 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 Implementation

[0038] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as a limitation of the present invention, but rather as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0039] It should be understood that the terminology used in this invention is merely for describing particular embodiments and is not intended to limit the invention. Furthermore, with respect to numerical ranges in this invention, it should be understood that the upper and lower limits of the range and each intermediate value between them are specifically disclosed. Any stated value or intermediate value within a stated range, as well as each smaller range between any other stated value or intermediate value within said range, are also included in this invention. The upper and lower limits of these smaller ranges may be independently included or excluded from the range.

[0040] Unless otherwise stated, 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 invention pertains. While only preferred methods and materials have been described herein, any methods and materials similar or equivalent to those described herein may be used in the implementation or testing of this invention. All references to this specification are incorporated by way of citation to disclose and describe methods and / or materials associated with those references. In the event of any conflict with any incorporated reference, the content of this specification shall prevail.

[0041] Example 1

[0042] This embodiment is an exemplary example illustrating the fully digital complete denture fabrication method of the present invention. Details are as follows:

[0043] I. Digital Acquisition of Preliminary Imprints

[0044] During the initial visit, a digital impression of the edentulous jaw is obtained directly through intraoral 3D scanning, without the need for any dental model, although using a dental model is currently the most common method for taking impressions. Conventional direct intraoral 3D scanning has limitations. For example, each single-field-of-view data frame needs to contain curvature variation features that can be used for stitching multi-field 3D data. When these curvature variation features are missing in the field of view, stitching errors or even misalignment can easily occur. Based on previous research, this application proposes a passive shaping technique for mucosal folding morphology, combined with a marking method and intraoral and extraoral scanning techniques. It has been found that this method can obtain a preliminary impression morphology that meets clinical needs. Figure 2 The process was validated and optimized by adding edentulous jaw scans under different conditions on different patients.

[0045] First, a three-dimensional scan was performed inside the patient's mouth to obtain impressions of the maxillary edentulous jaw and the mandibular edentulous jaw. Figure 3 Then, a prefabricated jaw recording device made using the present invention is used. Figure 10The appropriate model is selected based on the patient's dental arch size. Occlusal recording material (e.g., silicone rubber) is applied to the inner sides of both lateral edges and placed in the patient's mouth. The patient bites as instructed by the dentist. Some of the occlusal recording material enters the other side through the perforated structure, forming impressions of the upper and lower alveolar ridges on both sides of the prefabricated device. The occlusal position can be adjusted or additional recording material, such as silicone rubber, can be added as needed. The device can be integrally molded and cured. After curing, the prefabricated device is not removed; instead, impressions of the edentulous jaws and occlusal relationships are directly scanned. Figure 4 ).

[0046] II. Fabrication of Diagnostic Tray-Type Denture Solids

[0047] The distance between the lower 1 / 3 of the patient's mouth and the lowest vertical distance when biting the spacer is measured at a fixed point in the patient's relaxed and at rest position. The difference is calculated and given to the technician, who then raises the vertical distance along the z-axis in the software according to the value. Following the procedure, the technician performs digital impression registration and occlusion assessment of the edentulous maxilla and mandible, trims the margins, and re-establishes the occlusal relationship according to the raised distance, generating a preliminary working model. Digital pre-arrangement of teeth is then performed according to the anatomical landmarks of the complete denture. Figure 5 ), to generate diagnostic tray-type dentures.

[0048] Next, leave the anterior tooth aesthetic reference, midline, and zygomatic plane for clinical evaluation and modification. Add the pre-designed integrated Gothic bow Zebris (which can also be implemented with many other known hardware and software solutions) electronic motion facebow adapter. Figure 6 The integrated Gothic bow's tracing stylus, tracing plate, and adapter are all integrated with the diagnostic tray-type denture. The adapter includes a connector for connecting to an electronically controlled facebow. After design, the diagnostic tray-type denture is obtained through methods such as 3D printing. Figure 7 ).

[0049] III. Obtaining the final impression and determining the horizontal relationship

[0050] During the second visit, a diagnostic tray-type denture is fitted, and the vertical distance and / or aesthetic parameters are verified or adjusted. Minor adjustments are made if necessary. A closed-mouth impression is taken to obtain the final impression. The arch tracer is ground or filled with flowing resin to determine the final vertical distance. An active shaping marginal impression is taken to observe the anterior aesthetic zone, making appropriate adjustments and accurately marking the midline, occlusal plane, incisor exposure, and other necessary information. An electronic facebow is connected to record the patient's mandibular movement trajectory. Combining the mandibular trajectory characteristics displayed by speech, the prosthesis location is selected and locked with occlusal recording silicone rubber before transferring to the technician. Denture stabilizing agents may be used if necessary. If mandibular retention is still poor, denture stabilizing agents are used or a digital mechanical Gothic arch is used to complete the fabrication.

[0051] IV. Final Denture Design

[0052] Create a denture order, perform a scan of the entire maxillary and mandibular diagnostic dentures, and match the final occlusal relationship. Use any software to refine the denture model, remove the portion outside the marginal area, reverse the normal, and obtain a working model with occlusal relationship. Use any software with a complete denture module to design the final denture according to clinical requirements.

[0053] V. Fabrication of the final denture body

[0054] Using the generated cutting file, the final denture is directly cut using a two-color disc. The two-color disc has a red-white boundary line, especially in the red-white aesthetic zone on the labial side of the anterior teeth. Traditionally, the white resin at the base is manually ground and then repaired with gingival-colored self-curing resin. However, the aesthetic results are not ideal, especially on dentures with thin bases, where the self-curing resin cannot completely cover the red-white boundary, leading to dissatisfaction among dentists, technicians, and patients. This application uses digital back-cutting followed by a biomimetic resin shaping method to solve the above problems. Specific steps include:

[0055] 1. The thickness of the bionic gingiva is standardized by designing the red and white dividing line through software (or by cutting the red and white parts and then bonding them together).

[0056] 2. Use light-cured resin (such as the pine resin staining kit from Matsukaze Corporation) instead of self-curing resin for masking. Light-cured resin is denser than self-curing resin, has a stronger masking ability, is more durable, and has a full range of colors to choose from. It can ensure the gingival area is strong and has a better masking effect. Even if the tray is relatively thin, it can still achieve a better aesthetic effect. In addition, biomimetic blood vessels can be drawn as needed.

[0057] 3. To further address the problem of masking resin peeling off, or to ensure a stronger bond between the resin and the tray, a self-curing resin and / or a heat-curing resin for biomimetic gingiva fabrication is applied to the light-cured resin base. Exemplarily, a self-curing resin (e.g., a Yamahachi product) is used to build up the light-cured resin area and surrounding area, followed by conventional self-curing. In a preferred embodiment, a simple injection molding + heat-curing resin (e.g., a Wotasys product) method is used, followed by pressure heat curing. The resulting denture is strong and free of microbubbles. Figure 8 and Figure 9 ).

[0058] In an exemplary embodiment, the biomimetic resin molding method includes:

[0059] The biomimetic resin thickness of the tray is recut based on the design. Then, wax is used to recreate the gingival thickness recut during the digital design. A silicone rubber mold is used, and injection holes and drainage holes are drilled. The wax is then removed, and the gingival area is manually overcut and sandblasted. Overcutting involves creating undercuts and / or textured structures that cannot be recut by equipment. The bonding surface is then treated with monomers and light-cured resin for masking at least once, for example, two, three, or four times or more, with each light-curing session lasting half a minute, followed by a 3-minute light-curing period after brushing. Finally, simple injection molding is performed, followed by polishing to complete the process.

[0060] This application's digital design method for determining the back-cut range and depth replaces manual operation, achieving greater accuracy. Using photosensitive resin in selectable colors instead of self-curing resin for masking achieves an aesthetically pleasing effect. The treatment of the back-cut surface's underlayer ensures the photosensitive resin's durability.

[0061] Based on the personalized design scheme of digital complete dentures of this invention, customized complete dentures have been generated in clinical practice for numerous patients of different genders and ages according to their jawbone anatomical characteristics. Key evaluation indicators show that compared with traditional dentures, the accuracy of jaw position relationship (compared to scans of the denture on the articulator and intraoral scans before and after denture adaptation) is significantly improved, the amount of prosthesis adjustment (calculated from scans before and after denture adjustment) is significantly reduced, and the marginal fit and tightness of the denture (average gap ≤120μm), clinical efficiency (60% improvement compared to traditional methods) are all significantly higher than the control group; patient subjective satisfaction reached 95% (VAS score), mainly covering improvements in comfort, speech clarity, and aesthetics; long-term follow-up showed no sustained tray breakage rate, confirming its clinical advantages.

[0062] Example 2

[0063] This embodiment exemplifies the structure of a segmented diagnostic tray-type denture used in the fully digital complete denture fabrication process, which consists of an maxillary diagnostic denture and a mandibular diagnostic denture. Among them, Figure 11 An exemplary diagram illustrates the structure of a mandibular diagnostic denture, which includes the lower dentition ( Figure 11 A) and lower tray ( Figure 11 B). Figure 11 Only the main structure of the lower tray is shown as an example in section B; the depicted components of the lower tray are not shown. Additionally, Figure 12 An exemplary side view of the lower tray in a mandibular diagnostic denture is shown. Figure 12 As shown, the height of the highest point of the tracing needle, which is integrally formed with the lower tray, is greater than the height of the rest of the lower tray. In use, the lower dental arch and the lower tray are assembled (e.g., bonded).

[0064] This embodiment significantly improves the measurement of occlusal height and enhances the accuracy of closed-mouth impression taking through an innovative segmented design. Specifically, in traditional designs, the force is highly concentrated on the upper and lower jaw supports supported solely by the Gothic arch tracer. When taking a closed-mouth impression, uneven occlusal force can easily lead to excessive local pressure and mucosal deformation, affecting the accuracy of the impression. The segmented design of this embodiment, by repositioning the mandibular occlusal surface, ensures a uniform distribution of occlusal force, thereby obtaining a uniform and accurate closed-mouth impression. Furthermore, this embodiment optimizes the occlusal height determination process. When testing and determining the occlusal height of the initial jaw relationship, after repositioning the mandibular occlusal surface, the occlusal surface of the lower dentition can be directly ground or wax can be directly applied to the original occlusal surface for shaping, thus greatly improving efficiency.

[0065] Although the 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 adjustments or changes may be made to the exemplary embodiments described in this specification without departing from the scope or spirit of the invention. The scope of the claims should be interpreted in the broadest possible sense to cover all modifications and equivalent structures and functions.

Claims

1. A fully digitalized method for fabricating complete dentures, 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 entity is a segmented structure or a non-segmented structure, and a transfer accessory with a digital Gothic arch tracing needle and tracing plate is designed to manufacture the diagnostic tray-type denture entity. (2) Try on the diagnostic tray-type denture entity and verify or adjust the vertical distance and / or aesthetic parameters. Make minor adjustments if necessary. Take a closed-mouth impression to obtain the final impression. With the assistance of an electronic motion facebow, locate and determine the centric position or the patient's habitual position by following the mandibular movement trajectory and using digital Gothic arch information, combined with the mandibular trajectory characteristics. 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; and (3) Try on the preliminary complete denture body and make further adjustments as needed. They eventually received complete dentures. 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.

2. The fully digitalized complete denture fabrication method 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 fully digitalized complete denture fabrication method 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.

4. The fully digitalized complete denture fabrication method according to claim 1, characterized in that, During the trial fitting of the diagnostic tray-type denture, adjustments were made, an active shaping marginal impression was taken, and the anterior aesthetic zone was observed. Appropriate modifications were then made, and the midline was precisely marked. Information on plane and incisor exposure.

5. The fully digitalized complete denture fabrication method according to claim 1, characterized in that, Further, this includes connecting an electronically controlled facial bow to the diagnostic tray-type denture entity via the aforementioned adapter, recording the patient's mandibular movement trajectory, and combining this with the mandibular trajectory characteristics displayed using a speech method to select stable and reproducible models. Location.

6. The fully digitalized complete denture fabrication method according to claim 5, characterized in that, Further use of denture stabilizing agents can aid in the diagnosis of solid retention of tray-type dentures.

7. The fully digitalized complete denture fabrication method according to claim 1, characterized in that, The scan in step (2) includes scanning the upper and lower jaw diagnostic tray-type denture bodies after the chamber scan adjustment and matching the final occlusal relationship.

8. The fully digitalized complete denture fabrication method 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.

9. The fully digitalized complete denture fabrication method according to claim 1, characterized in that, Further steps include designing personalized gums.

10. The fully digitalized complete denture fabrication method according to claim 9, characterized in that, The personalized gingival design involves using software to cut out a biomimetic gingival space, followed by overcutting, i.e., grinding the texture and / or undercutting, then roughening the bottom surface by sandblasting, and finally restoring the biomimetic gingival by simple injection molding combined with thermosetting resin after masking with light-cured resin.

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

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