A method for constructing and preparing a personalized calorie support model

Abstract

This invention discloses a method for constructing and preparing a personalized jaw restorative model, addressing the problems of low accuracy in traditional individual pallet impression taking and complex jaw position recording procedures. The individual pallet of this invention features a removable impression terminator on its tissue surface for accurate final impression taking in edentulous jaws; furthermore, a digital jaw dam is designed above the pallet to maintain the patient's vertical distance and is compatible with mandibular motion recording and analysis systems for acquiring and recording horizontal jaw position relationships. This device simplifies the clinical process and reduces the reliance on experience and technical sensitivity in edentulous jaw restoration.

Description

Technical Field

[0001] This invention relates to a complete denture restoration technique, specifically to a method for constructing and preparing a personalized denture model, which is mainly used to obtain accurate impressions and determine the occlusal relationship of edentulous jaws. Background Technology

[0002] Edentulousness is a common and frequently occurring condition in prosthodontics. Currently, mucosa-supported complete dentures remain the primary method of restoration for edentulous individuals. However, traditional complete denture restoration involves complex clinical procedures and high technical sensitivity, requiring patients to visit multiple times from the initial consultation to the final denture fitting, causing significant inconvenience, especially for elderly patients.

[0003] Digital technology has brought more possibilities to complete denture restoration. Applying digital technology to traditional processes can help simplify experience-based clinical operations, reduce the number of patient visits, and improve restoration accuracy.

[0004] Taking accurate impressions of the edentulous jaw is crucial to ensuring good retention and stability of complete dentures, and is also the first step in guaranteeing treatment outcomes.

[0005] Traditionally, edentulous jaw impressions are obtained using a two-step method: first, a preliminary impression is made using a pre-made tray and a plaster model is then created; then, edge lines are drawn on the plaster model, and individual trays that perfectly match the edentulous jaw tissue surface are handcrafted on the plaster model using light-cured resin sheets to obtain more accurate edentulous jaw impressions.

[0006] However, the process of manually making individual trays is complex, and it is difficult to standardize the thickness and edge extension of the trays. Furthermore, when using individual trays to make the final impression, the pressure applied to the tray cannot be precisely controlled, and the thickness of the impression material on the tissue surface of the tray cannot be guaranteed to be uniform. At the same time, the mucosa in some areas may also be deformed due to excessive force, which will reduce the accuracy of the impression and affect the precision of the complete denture.

[0007] One study used computer modeling software to design a "tissue terminator" to control the thickness of the impression material. This involved designing protrusions of different shapes and thicknesses on the tissue surface of individual trays to limit the thickness of the impression material. However, in digital individual trays designed using this method, the area where the tissue terminator is located on the tray's tissue surface consistently fails to allow the impression material to flow in during final impression taking, resulting in the inability to obtain the corresponding tissue impression. Furthermore, to avoid an excessively large area where precise impressions cannot be taken, the area of ​​these protrusions is relatively small; that is, the area on the individual tray's tissue surface that can make contact with the edentulous occlusal mucosa is small. This may cause instability in the tray's intraoral positioning, leading to impression errors. Summary of the Invention

[0008] In view of the defects or deficiencies of the existing technology, the present invention provides a method for constructing a personalized AUTO model.

[0009] Therefore, the method for constructing a personalized support model provided by this invention includes:

[0010] Obtain digital models of the upper and lower jaws inside the oral cavity of an edentulous mandible; then design individual pallet models of the upper and lower jaws based on the digital models of the upper and lower jaws.

[0011] A first facet matching the mid-region of the palatal dome tissue surface of the individual maxillary tray model is generated, and a second facet matching the bilateral mandibular posterior tooth tissue surface of the individual mandibular tray model is generated.

[0012] The first facet, the second facet, and individual pallet models of the upper and lower jaws constitute a personalized pallet model of the upper and lower jaws.

[0013] An alternative approach is that the first facet is connected to the palatal dome tissue surface of the maxillary individual tray via a mortise and tenon structure; and the second facet is connected to the bilateral mandibular posterior tooth tissue surfaces of the mandibular individual tray via a mortise and tenon structure.

[0014] A further approach is to include the following methods:

[0015] Obtain digital models of the upper and lower jaws and initial occlusal relationship data within the oral cavity of an edentulous mandible; register the digital models of the upper and lower jaws with the initial occlusal relationship data to obtain digital models of the upper and lower jaws containing the initial occlusal relationship data;

[0016] Then, based on the digital model of the maxilla and mandible or the digital model of the maxilla and mandible containing the initial occlusal relationship data, individual pallet models of the maxilla and mandible are designed.

[0017] A first facet matching the mid-region of the palatal dome tissue surface of the individual maxillary tray model is generated, and a second facet matching the bilateral mandibular posterior tooth tissue surface of the individual mandibular tray model is generated.

[0018] Personalized ridge models of the upper and lower jaws are designed on individual pallet models of the upper and lower jaws. The height, width, and convexity of the personalized ridge models of the upper and lower jaws are matched with the initial occlusal relationship data.

[0019] The first facet, the second facet, the individual pallet models of the upper and lower jaws, and the personalized pallet models of the upper and lower jaws constitute the personalized pallet model of the upper and lower jaws.

[0020] In a further proposed solution, the above method also includes:

[0021] Multiple first holes were made on the labial side of the anterior tooth region of the personalized maxillary denture model;

[0022] Multiple second holes were set on the occlusal surfaces of the anterior teeth region and the bilateral premolar regions of the personalized occlusal bracket model of the upper and lower jaws;

[0023] First grooves are set on the occlusal surfaces of the bilateral posterior teeth in the personalized occlusal model of the upper and lower jaws;

[0024] A second groove is provided on the labial side of the anterior to premolar region on both sides of the mandibular personalized dentistry model;

[0025] A protruding structure is provided in the posterior region of the polished surface of individual pallet models of the maxilla.

[0026] In some other embodiments, the above method further includes: the palatal dome tissue surface of the individual maxillary tray is provided with a tenon, and the protruding structure is formed by the recess of the tenon in the palatal dome tissue surface of the individual maxillary tray.

[0027] This invention also provides a method for preparing personalized lipstick holders. The provided method includes using a 3D printing method to prepare personalized lipstick holders based on a model constructed according to the above method.

[0028] In this invention, the individual tray tissue surfaces are designed with easily detachable sheet structures to serve as impression termins for accurate final impression taking in edentulous jaws. In a further embodiment, a digital ledge is designed above the tray to maintain the patient's vertical distance and is compatible with a mandibular motion recording and analysis system for acquiring and recording horizontal jaw relationships. This device simplifies the clinical process and reduces the reliance on experience and technical sensitivity in edentulous jaw restoration. Attached Figure Description

[0029] Figure 1 A is the digital model in this embodiment of the invention; B is the digital model of the maxilla; C is a schematic diagram of the centric occlusal tray for obtaining the initial occlusal relationship record of the maxilla and mandible (i.e., the initial occlusal relationship data); D is an individual tray model of the maxilla and mandible with a personalized ridge model.

[0030] Figure 2 Figure A shows the individual tray models of the upper and lower jaws obtained in this embodiment of the invention, and Figure B shows the individual tray model of the lower jaw.

[0031] Figure 3 The images show the facet structure, personalized ridge model, and finished product in this embodiment of the invention; A is the first facet; B is the second facet; C is a schematic diagram of the first facet matching the tissue surface of the maxillary individual tray model; D is a schematic diagram of the second facet matching the tissue surface of the mandibular individual tray model; E and F are schematic diagrams of designing retention structures at corresponding parts of the ridge model; G is a physical image of the personalized maxillary ridge (maxillary ridge not shown); H is a physical image of the personalized mandibular ridge (second facet not shown).

[0032] Figure 4 This is a flowchart illustrating the process of taking a maxillary edentulous jaw impression in an embodiment of the present invention; A is a top view of the tissue surface after taking the final impression of the alveolar ridge with a single maxillary tray (including the first facet); B is a side view of the tissue surface after taking the final impression of the alveolar ridge with a single maxillary tray (including the first facet); wherein the impression thickness of the alveolar ridge region is the same as the thickness of the first facet; C is a top view of the tissue surface of the maxillary edentulous jaw impression obtained after removing the first facet; D is a side view of the tissue surface of the maxillary edentulous jaw impression; wherein the impression thickness of the original first facet region is the same as that of the alveolar ridge region.

[0033] Figure 5 The following are illustrations illustrating the use of personalized face braces for digital and precise recording of jaw position relationships in embodiments of the present invention: A shows the patient wearing an individual face brace and the electronic facebow device used to obtain jaw position relationships; B shows the electronic facebow maxillary fork matching with the personalized face brace of the maxilla, which can determine the positional relationship of the maxilla relative to the temporomandibular joint; C shows the electronic facebow determining the patient's horizontal jaw position relationship (at this time, the patient is wearing a personalized face brace in their mouth); D and F are illustrations of different orientations of the upper and lower jaw face braces containing accurate occlusal relationship data.

[0034] Figure 6 The following are the maxillary and mandibular models containing accurate occlusal relationship data obtained in the embodiments of the present invention: A is the maxillary final model established by scanning data and data flipping based on the individual maxillary trays with completed final impressions; B is the mandibular final model established by scanning data and data flipping based on the individual mandibular trays with completed final impressions; and C is the maxillary and mandibular final model containing accurate occlusal relationship data. Detailed Implementation

[0035] Unless otherwise specified, the scientific and technical terms used in this article are intended for understanding by those skilled in the art.

[0036] In this invention, the upper and lower jaws refer to the maxilla and mandible. For example, the digital model of the upper and lower jaws refers to the digital model of the maxilla and the digital model of the mandible; other related terms are understood in this sense. The term "individual" or "personalized" in this invention can be understood as being tailored to the specific oral characteristics and occlusal data of a particular patient.

[0037] The personalized brace model construction method of the present invention can be implemented in dental software and engineering software. Dental software includes, but is not limited to, 3shape and Exocad; engineering software includes, but is not limited to, Geomagic Wrap and Materialise Magics. In the following embodiments, the dental software used is 3shape, and the engineering software is Geomagic Wrap.

[0038] Example 1:

[0039] This embodiment is an example of constructing a personalized jaw support model according to the present invention, which includes a first facet, a second facet, and individual pallet models of the upper and lower jaws:

[0040] Intraoral scanning of the oral cavity of edentulous patients to obtain digital models of the upper and lower jaws, see [link / reference]. Figure 1 As shown in A and B, individual pallet models of the upper and lower jaws can be obtained directly from the digital models of the upper and lower jaws; or individual pallet models of the upper and lower jaws can be obtained from the digital models of the upper and lower jaws containing initial occlusal relationship data. This embodiment generates individual pallet models of the upper and lower jaws on the digital models of the upper and lower jaws containing initial occlusal relationship data, and the specific method is as follows:

[0041] The resting occlusal gap method was used to initially determine the vertical occlusal distance, and the initial occlusal relationship data of the same edentulous patient was recorded using a centric occlusal tray. The specific method was as follows: impression material was evenly applied to the mandibular and maxillary tissue surfaces of the tray and placed in the patient's mouth; the tray was pressed against the mandibular alveolar ridge, and the patient was instructed to swallow saliva while gently biting down, avoiding mandibular protrusion; simultaneously, the labial silicone rubber on the maxilla was observed and adjusted to determine the appropriate upper lip convexity; after the silicone rubber had completely hardened, the midline, corner of the mouth line, and umbo plane were marked intraorally, and the centric occlusal tray was scanned using an extraoral scanning device to obtain the initial occlusal relationship data. (See [link to relevant documentation]). Figure 1 As shown in C;

[0042] Import the digital models of the upper and lower jaws and the initial occlusal relationship data (STL format) obtained in the above steps into the engineering software. Using the corresponding feature points of the alveolar ridge crest, complete the registration of the digital models of the upper and lower jaws with the initial occlusal relationship data, obtaining digital models of the upper and lower jaws containing the initial occlusal relationship data. Input these digital models into dental modeling software, sequentially calibrate anatomical landmarks such as the maxillary tuberosity, canine point, incisor papilla, labial frenulum, and retromolar pad, and determine the position of the occlusal plane based on the preliminary jaw relationship. Then, observe the model, fill undercuts, and generate individual palpable models of the upper and lower jaws, such as... Figure 2 As shown;

[0043] Import the individual pallet models of the upper and lower jaws in STL format into engineering software to further complete the subsequent design:

[0044] exist Figure 2 The palatal dome region (more precisely, the middle third region) and the bilateral mandibular posterior tooth region tissue surfaces of the maxillary individual tray model shown are respectively designed with a first and second facet of appropriate thickness, such as 1.5 mm, and morphology matching the corresponding tissue surfaces; in the preferred embodiment, each facet a is fixed by a concave-convex or mortise-and-tenon structure, in this embodiment the tenon b is located on the facet structure, and the mortise c is set on the corresponding tissue surface of the individual tray; see also Figure 3 As shown in AD.

[0045] Example 2:

[0046] The digital individual tray and two facets designed in Example 1 were 3D printed to produce a resin individual tray and facets, which is the personalized tray of this example. See [link / reference]. Figure 3 As shown in G and H.

[0047] Example of preparing individual trays (i.e., edentulous occlusal impressions) using the individual trays and face sheets prepared in Example 2:

[0048] (1) Assemble, inspect, and adjust individual trays: Assemble the first and second panels with the individual trays using mortise and tenon joints. After they are fully in place, try them on in the patient's mouth, check the edges of the individual trays, and adjust any excessively long edges.

[0049] (2) Edge shaping: Before starting the procedure, teach the patient to practice sucking, swallowing, and making "ah" sounds; thoroughly dry the edges and tissue surfaces of the individual trays fitted with the two facets to prevent the edge shaping silicone rubber from falling off; during edge shaping, in addition to adding sufficient silicone rubber to the edges of the individual trays and the posterior maxillary ridge area, a small amount of edge shaping silicone rubber can be placed on the tissue surface of the tray, excluding the two facets; then reposition the individual tray intraorally and press to complete the edge shaping action; at the same time, use the thickness of the two facets for support to ensure that 1.5mm of impression material remains on the tissue surface of the tray, excluding the area of ​​the two facets, see [link to relevant documentation]. Figure 4 As shown in A and B;

[0050] (3) Remove the two surface pieces and the impression material that has overflowed onto the surface of the termination piece outside the mouth, and apply a silicone rubber lightweight material to the area. When in place, accurately reposition the individual tray by shaping the initial impression with silicone rubber at the edges without applying additional force; remove it after the lightweight material has completely solidified, and you will obtain an individual tray for the final impression of the edentulous jaw with 1.5 mm thick impression material on all tissue surfaces, such as Figure 4 As shown in C and D.

[0051] Another crucial step in the complete denture treatment process for edentulous patients is determining the jaw relationship (occlusal relationship). The jaw relationship includes the vertical height (vertical distance) between the upper and lower jaws and their horizontal positional relationship. When a stable natural dentition is present, the jaw relationship is maintained by the uniform and extensive contact achieved after the upper and lower teeth occlude. When teeth are missing, the unrestrained mandible can shift in various directions, leading to the loss of a stable jaw relationship. Therefore, re-determining a suitable jaw relationship is essential for the success of complete denture restoration.

[0052] In traditional procedures, jaw position is typically recorded at the follow-up appointment after the final impression is taken. Recording the vertical distance requires creating a wax embankment of a certain height on a plaster model, then trying it on in the mouth. The resting gap between the upper and lower wax embankments is observed, supplemented by observation of the lower third of the face and anatomical landmarks such as the nasolabial fold, repeatedly adjusting the wax embankment height to achieve the appropriate vertical distance. This procedure is quite cumbersome and technically sensitive. The wax embankment needs to be softened at high temperatures before shaping, and the use of flame sources such as alcohol lamps carries certain safety risks. Excessively hot wax embankments entering the patient's mouth also pose a risk of burns. Meanwhile, the horizontal jaw position of edentulous patients is usually established based on the centric relation. The centric relation, that is, the unrestricted physiological posterior position of the mandibular condyle in the glenoid fossa, is also the only reproducible position obtainable for edentulous patients. Clinically, the centric relation is obtained either by manually guiding the mandible to retract, or by instructing the patient to repeatedly open their mouth slightly and quickly bite down; both methods require a high level of skill and clinical experience from the physician.

[0053] Gothic archography, as a relatively intuitive and standardized method for obtaining the midline position, is not widely used in clinical treatment due to its requirement for additional metal devices and cumbersome installation procedures.

[0054] In recent years, with the development of digital technology, the clinical application of mandibular motion recording and analysis systems (electronic facebows) has helped obtain personalized mandibular movements from patients, assisting physicians in recording jaw position relationships under visual guidance. However, currently, this system is mostly used to determine the jaw position relationship of patients undergoing occlusal reconstruction through fixed restorations, and there are no reports on specific methods for applying mandibular motion recording and analysis systems to determine the jaw position relationship of edentulous patients. Mandibular motion recording and analysis systems determine the optimal jaw position for patients by recording their mandibular movements; simultaneously, the acquired personalized mandibular motion parameters can be used for dynamic occlusal design of dentures. Dentures incorporating dynamic occlusal design not only fit the patient's stomatognathic system statically but also meet the occlusal needs of patients when performing functional movements (such as chewing). However, in clinical application, this device requires bonding a jaw fork for tracking mandibular movements to the outer surface of the patient's mandibular dentition. Due to the absence of intraoral teeth in edentulous patients, the use of this type of device is limited.

[0055] In other embodiments of the present invention, the personalized facebone model includes two face plates and individual palate models for the upper and lower jaws, as well as a personalized facebone model. This model can be used with a mandibular motion recording and analysis system (electronic facebow) to determine precise occlusal relationship data for edentulous patients.

[0056] Example 3:

[0057] This embodiment is a further design based on the model in Embodiment 1, resulting in a personalized palpable support model that includes individual palpable support models for the upper and lower jaws, two facets, and a personalized palpable support model.

[0058] Based on the initial occlusal relationship data described in Example 1, the height, width, and convexity of the maxillary and mandibular ridges were determined on the individual palpable tray models obtained in Example 1, thus completing the personalized ridge model design. (See [link to relevant documentation]). Figure 1 As shown in D, and output in STL format.

[0059] When using a personalized facebone model with a facet model and a mandibular motion recording and analysis system (electronic facebow) to determine the precise occlusal relationship data of edentulous patients, a further approach involves designing retention structures at corresponding locations on the facet model to ensure occlusal adjustment and fixation of the auxiliary equipment during the process. A specific example is shown below:

[0060] exist Figure 1 As shown in Figure D, multiple first holes e are provided on the labial side of the anterior tooth region of the personalized maxillary denture model. This embodiment provides four evenly distributed first holes e. See [reference needed]. Figure 3 As shown in E and F, silicone rubber or wax blocks are added for fixation when scanning, positioning and determining the maxillary labial convexity.

[0061] Multiple second holes g are provided on the occlusal surfaces of the anterior and premolar regions of the personalized occlusal bracket model of the upper and lower jaws; in this embodiment, four evenly distributed second holes g are provided for scanning positioning and occlusal recording of the anterior and premolar regions and for the retention of silicone rubber.

[0062] First grooves h are set on the occlusal surfaces of the bilateral posterior tooth regions of the personalized occlusal bracket model of the upper and lower jaws; these are used for the retention of silicone rubber for occlusal recording, and for adding the retention of silicone rubber and wax blocks when it is necessary to increase the vertical distance of occlusion, as well as for scanning and positioning of the molar region occlusal ridges.

[0063] Second grooves f are set on the labial surfaces of the bilateral anterior teeth to premolar areas of the mandibular personalized mandibular support model to fix the mandibular fork of the mandibular motion recording and analysis system when recording the final jaw position relationship.

[0064] In some designs, a raised structure d is created in the posterior region of the polished surface of the individual maxillary tray model to guide the patient's mandible to retract when determining the horizontal jaw relationship. In other designs, the mortise in the tenon structure located at the posterior end of the maxillary palatal vault protrudes downward, forming a raised structure d on the polished surface of the individual tray.

[0065] Example 4:

[0066] The personalized jaw support model designed in Example 3 was 3D printed to produce personalized upper and lower jaw supports made of resin. (See attached image.) Figure 3 As shown in G and H.

[0067] Using the face sheet prepared in this embodiment and the individual tray, an individual tray with an impression (i.e., an edentulous jaw impression) is obtained from the patient, and the operation is the same as described in Embodiment 2 above.

[0068] The patient's precise jaw relationship (i.e., accurate occlusal relationship data) was then obtained using the personalized jawbone support and mandibular motion recording and analysis system (electronic facebow) prepared in Example 4.

[0069] (1) Obtaining the vertical jaw relationship: Place the individual tray with the impression back into the patient's mouth, and after ensuring that it is in place and stable, check and confirm the upper lip protrusion and vertical distance, and mark the maxillary midline and corner of the mouth on the lip rim; if it is necessary to lower the resin lip rim, it can be ground to the appropriate height with a low-speed handpiece, and then the second hole and the first groove can be re-carved and deepened; if it is necessary to increase the height of the lip rim, wax blocks can be added to the second hole and the first groove on the occlusal surface; if it is necessary to increase the upper lip protrusion, silicone rubber / wax blocks can be added to the first hole on the labial side; the corrected upper and lower individual lip trays are obtained.

[0070] (2) Install a mandibular movement recording and analysis system (electronic facebow) in the patient's mouth:

[0071] a) Securely position the modified upper and lower individual mandibular supports in the patient's mouth, and guide the patient to perform repetitive protrusion, lateral movement, and mandibular retraction training at the chairside to ensure that the patient can correctly complete the mandibular functional movements under the operator's instructions.

[0072] b) Instruct the patient to look straight ahead in a natural head position. Evenly spread the occlusal recording material onto the maxillary fork of the mandibular motion recording and analysis system. Position the material from back to front on the occlusal surface of the maxillary ridge. After it has hardened, remove it, trim any excess material, and ensure it can be stably repositioned. See [link to relevant documentation]. Figure 5 As shown in B;

[0073] c) Connect all components of the mandibular motion recording and analysis system correctly according to the product operating instructions, fix the head-mounted camera, and use light-cured fluid resin to fix the edentulous jaw clamp (mandibular positioning fork) in the second groove on the labial side of the mandibular ridge; after the resin has completely hardened, guide the patient to perform mandibular movements again, ensuring that the edentulous jaw clamp is firm, stable, and does not wobble during movement; the mandibular movement should be smooth and undisturbed. See [link to product manual]. Figure 5 As shown in Figure A.

[0074] (3) Using a mandibular movement recording and analysis system to help determine the horizontal jaw position: Record the patient's habitual closed position after muscle relaxation, and the mandibular retraction position where the tongue licks the protruding structures in the posterior region of the maxilla and slowly closes. Then guide the patient to perform small-range opening and closing movements, keeping the mouth firmly closed. Record the position and repeat 7 times. The software will calculate the most repeatable position from the 7 recorded positions. Next, guide the patient to repeatedly perform forward, leftward, and rightward movements, i.e., perform digital Gothic arch tracing. After recording, the software automatically calculates the position of the Gothic arch apex. Finally, based on the most repeatable position indicated by the green dot in the center of the screen, guide the patient to move their intraoral position to the green dot position. When the cursor representing the mandibular position coincides with the center green dot position, it is the ideal final jaw position. See [link to relevant documentation]. Figure 5 As shown in C.

[0075] At this point, the prepared occlusal recording silicone rubber is inserted into the oral cavity between the upper and lower jaw ridges and fixed in place using the first groove and the second hole. Throughout the process, it is necessary to ensure that the position inside the mouth and the position of the green dot always remain overlapping.

[0076] Once the occlusal recording material has hardened, accurate records of vertical height and horizontal relationships can be obtained, thus acquiring occlusal relationship data including accurate vertical distances and horizontal jaw relationships; see [link to documentation]. Figure 5 As shown in DF.

[0077] Further digital final model and final jaw position relationship are obtained through scanning and data flipping (done in engineering transfer): individual trays for completing the final impression ( Figure 4 (as shown in C and D), and occlusal relationship data recording vertical distance and horizontal jaw position relationship (as shown in C and D). Figure 5 (As shown in DF) The data was converted into digital information using a desktop scanner and output in STL format as a final edentulous jaw model with the final jaw position relationship. See [link / reference]. Figure 6 As shown in AC.

[0078] In practical applications, the patient's personalized mandibular movement parameters can also be obtained based on the above step (2): reposition the maxillary fork and connect the optical sensor to locate the maxillary plane; then remove the maxillary fork and reconnect the optical sensor to the front end of the mandibular edentulous jaw clamp; according to the software prompts, guide the patient to perform the forward movement, left-side movement and right-side movement in sequence, and measure each movement three times to complete the measurement; output the digital reference position of the maxillary plane and personalized mandibular movement parameters used to transfer the virtual frame.

Claims

1. A method for constructing a personalized GUI model, characterized in that the method... include: Obtain digital models of the upper and lower jaws inside the oral cavity of an edentulous mandible; then design individual pallet models of the upper and lower jaws based on the digital models of the upper and lower jaws. A first facet matching the mid-region of the palatal dome tissue surface of the individual maxillary tray model is generated, and a second facet matching the bilateral mandibular posterior tooth tissue surface of the individual mandibular tray model is generated. The first facet, the second facet, and individual pallet models of the upper and lower jaws constitute a personalized pallet model of the upper and lower jaws. The first faceplate is connected to the palatal dome tissue surface of the maxillary individual tray via a mortise and tenon structure; the second faceplate is connected to the bilateral mandibular posterior tooth tissue surfaces of the mandibular individual tray via a mortise and tenon structure.

2. The method for constructing a personalized support model according to claim 1, characterized in that the method... include: Obtain digital models of the upper and lower jaws and initial occlusal relationship data within the oral cavity of edentulous individuals; The digital models of the upper and lower jaws are registered with the initial occlusal relationship data to obtain digital models of the upper and lower jaws that include the initial occlusal relationship data. Then, based on the digital model of the maxilla and mandible or the digital model of the maxilla and mandible containing the initial occlusal relationship data, individual pallet models of the maxilla and mandible are designed. A first facet matching the mid-region of the palatal dome tissue surface of the individual maxillary tray model is generated, and a second facet matching the bilateral mandibular posterior tooth tissue surface of the individual mandibular tray model is generated. Personalized ridge models of the upper and lower jaws are designed on individual pallet models of the upper and lower jaws. The height, width, and convexity of the personalized ridge models of the upper and lower jaws are matched with the initial occlusal relationship data. The first facet, the second facet, the individual pallet models of the upper and lower jaws, and the personalized pallet models of the upper and lower jaws constitute the personalized pallet model of the upper and lower jaws.

3. The method for constructing a personalized support model according to claim 1, characterized in that, The method also includes: Multiple first holes were made on the labial side of the anterior tooth region of the personalized maxillary denture model; Multiple second holes were set on the occlusal surfaces of the anterior teeth region and the bilateral premolar regions of the personalized occlusal bracket model of the upper and lower jaws; First grooves are set on the occlusal surfaces of the bilateral posterior teeth in the personalized occlusal model of the upper and lower jaws; A second groove is provided on the labial side of the anterior to premolar region on both sides of the mandibular personalized dentistry model; A protruding structure is provided in the posterior region of the polished surface of individual pallet models of the maxilla.

4. The method for constructing a personalized support model according to claim 3, characterized in that, The method further includes: the palatal dome tissue surface of the individual maxillary tray is provided with a tenon groove, and the protruding structure is formed by the recess of the tenon groove on the palatal dome tissue surface of the individual maxillary tray.

5. A method for preparing a personalized PVC tray, characterized in that, The model constructed according to any one of claims 1-4 is used to prepare a personalized patina using a 3D printing method.

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