A palatal shield

Abstract

The application discloses a palatal shield and belongs to the technical field of oral cavity medical instruments. The palatal shield comprises an integrally-formed palatal plate body, the tissue surface of the palatal plate body is matched with the shape of the maxillary palate and maxillary dentition of a patient, a point-shaped gap group, a long-strip-shaped gap and a reserved window are arranged on the palatal plate body. The point-shaped gap group is arranged along an incision line designed before operation and is used for marking an incision track during operation; the long-strip-shaped gap is located at a position corresponding to a flap-turning side and is used for enabling a turned mucoperiosteal flap to pass out; and the reserved window is located at a position corresponding to a body surface projection of an embedded tooth and is used for limiting a bone-removing range and forming a tooth extraction operation channel. The palatal shield integrates the functions of intraoperative positioning and guiding and postoperative wound protection, can reduce the flap-turning and bone-removing ranges, accurately positions the embedded tooth and continues to protect the palatal wound after operation.

Description

Technical Field

[0001] This invention relates to the field of oral medical device technology, and in particular to a palate protector. Background Technology

[0002] Extraction of impacted teeth on the palatal side of the maxilla is a common and complex tooth extraction procedure in oral and maxillofacial surgery and pediatric dentistry. It is particularly suitable for cases requiring exposure and extraction via a palatal approach, such as impacted supernumerary teeth on the palatal side of the maxilla or impacted teeth in the mid-posterior region of the maxilla. Because the impacted tooth is located within the palatal bone tissue, the flap incision, bone removal area, and extraction channel must be determined intraoperatively based on the positional relationship between the impacted tooth and adjacent teeth, the palatal bone plate, and surrounding important anatomical structures. Inaccurate positioning can easily lead to an enlarged flap area, increased bone removal, or damage to adjacent tissues. Therefore, in this type of surgery, imaging data, positioning aids, or postoperative protective devices are usually required to improve surgical positioning accuracy, reduce surgical trauma, and protect the palatal wound postoperatively.

[0003] Current methods for treating impacted teeth on the maxillary palate primarily include two types of devices: intraoperative positioning guides and postoperative palatal flaps. Intraoperative positioning guides are typically fabricated based on CBCT imaging data and the patient's intraoral data. They often employ a local tooth-supported structure, fitting snugly against the patient's local dentition to achieve placement. Positioning structures corresponding to the predetermined incision or bone removal area are incorporated into the guide, assisting the surgeon in determining the flap incision and bone removal extent, thus improving the accuracy of impacted tooth exposure. Postoperative palatal flaps are mainly used for palatal wound care. Traditional palatal flaps are often fixed to the dentition using clasps, while film-formed or digitally printed palatal flaps achieve retention by conforming to the palate and dentition morphology. During use, they cover the palatal wound area to reduce food irritation and pressure on the tongue, providing postoperative protection.

[0004] However, the existing devices still present technical challenges in practical use, making it difficult to simultaneously achieve precise intraoperative positioning guidance and postoperative wound protection within the same instrument. This is because most existing digital positioning guides are designed solely for intraoperative positioning, primarily serving incision design and bone removal guidance. After surgery, they typically no longer provide wound coverage and protection, leaving the palatal mucoperiosteal flap susceptible to factors such as swallowing, tongue pressure, food irritation, and infection, potentially leading to wound dehiscence and poor healing. While traditional palatal guards, pressure-film palatal guards, or digitally printed palatal guards can cover the wound postoperatively, their structures primarily serve postoperative care and lack positioning guidance structures corresponding to the impacted tooth surface projection, incision line, and bone removal area. Therefore, they cannot assist in precise intraoperative positioning of the impacted tooth and limitation of the bone removal area. Furthermore, intraoperative positioning guides and postoperative palatal guards usually require separate design, fabrication, and sequential wearing, increasing medical costs and preoperative preparation time, as well as clinical procedures and patient burden, especially for children in the mixed dentition stage, leading to poor compliance. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a palatal guard to solve the problems of the separation of intraoperative positioning guide and postoperative palatal guard in the prior art, the single function, and the difficulty in taking into account both accurate intraoperative positioning guidance and postoperative wound protection in the same instrument.

[0006] To solve the above-mentioned technical problems, the present invention provides a palatal guard, comprising an integrally formed palatal side plate, wherein the tissue surface of the palatal side plate is adapted to the morphology of the patient's maxillary palate and maxillary dentition.

[0007] The palatal lateral plate is provided with a group of dot-shaped gaps, a long strip-shaped slit, and a reserved window; the group of dot-shaped gaps is arranged along the area corresponding to the preoperatively designed incision line, which is used to allow the marking pen to pass through and form an incision mark on the palatal mucoperiosteum; the long strip-shaped slit is located on the palatal lateral plate at the position corresponding to the mucoperiosteal flap being flipped up, which is used to allow the flipped mucoperiosteal flap to pass through; the reserved window is located on the palatal lateral plate at the position corresponding to the surface projection of the impacted tooth, which is used to limit the bone removal range and form a tooth extraction operation channel.

[0008] Furthermore, the dotted void group includes multiple dotted voids penetrating the palatal lateral plate, and the multiple dotted voids are arranged sequentially and at intervals along the preoperatively designed incision line. The diameter of the dotted void is approximately 1 mm, and the spacing between adjacent dotted voids is 2–4 mm.

[0009] Furthermore, the elongated slit is a narrow through-slot that penetrates the palatal lateral plate, with a width of approximately 3 mm and a length that matches the preoperatively designed flap range.

[0010] Furthermore, the reserved window is an opening structure that penetrates the palatal lateral plate, and its shape and size are determined based on the impacted tooth profile and the extent of surrounding bone removal obtained by CBCT measurement. The reserved window is typically elliptical in shape.

[0011] Furthermore, the posterior edge of the palatal lateral plate can extend to the maxillary tuberosity region to increase the range of retention.

[0012] Furthermore, the tissue surface of the palatal lateral plate is in close contact with the patient's palatal mucosa, or a gap of 0.2 to 0.5 mm is reserved between the tissue surface and the palatal mucosa.

[0013] Furthermore, the palatal shield is integrally formed by 3D printing based on a three-dimensional model formed by fusing the patient's CBCT data and intraoral scan data, and the material used is medical-grade photosensitive resin or PEEK material.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: In this invention, by integrating the dotted gap group, the elongated slit, the reserved window, and the palatal plate base into one unit, the palatal plate simultaneously provides intraoperative positioning guidance and postoperative wound protection. During operation, the dotted gap group allows a methylene blue marker to pass through and form a marking trajectory on the palatal mucoperiosteum corresponding to the preoperatively designed incision line, facilitating flap elevation by the surgeon according to the pre-designed incision. The elongated slit allows the raised mucoperiosteal flap to pass through and be fixed to the outside of the palatal plate, ensuring the palatal plate remains in place after flap elevation while preventing the mucoperiosteal flap from obscuring the surgical area. The reserved window corresponds to the surface projection of the impacted tooth and the bone removal range. The window edge can serve as a boundary reference for the intraoperative bone removal range, and the internal space of the window can serve as an operating channel for ultrasonic bone scalpel bone removal and tooth extraction instruments. Therefore, this approach can reduce repeated positioning during surgery, avoid blindly expanding the flap and bone removal area, improve the accuracy of positioning, exposure and extraction of impacted maxillary palatal teeth, and reduce damage to adjacent teeth and surrounding important anatomical structures, which is conducive to achieving precise and minimally invasive surgical operations.

[0015] This approach integrates the intraoperative guide and postoperative palatal flap into one device, eliminating the need for separate design, printing, and wearing of two separate devices, thus saving on digital design and manufacturing costs and clinical operation time. After the surgery is completed and the wound is sutured, the palatal flap can continue to be worn in the patient's mouth to cover and protect the palatal surgical wound, isolate food irritation, and reduce the impact of tongue pressure and swallowing movements on the palatal mucoperiosteal flap and incision area, thereby reducing the risk of incision infection, dehiscence, and poor healing, and promoting postoperative recovery. Because the palatal flap is personalized based on the patient's intraoral scan data, its overall shape is adapted to the maxillary palate and dentition, achieving good retention. It does not require the use of traditional clasps, resulting in less foreign body sensation, making it particularly suitable for children in the mixed dentition stage. Furthermore, the intraoperative procedure of this approach is relatively standardized. The surgeon only needs to mark the incision according to the dotted gaps, flip the flap, fix the mucoperiosteal flap through the long strip slit, and then complete the bone removal and tooth extraction through the reserved window. It has the advantages of simple operation, short learning curve, and ease of clinical application. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the palatal guard of the present invention; Figure 2 This is a schematic diagram of the side structure of the palatal guard of the present invention; Figure 3 This is a three-dimensional structural diagram of the palatal guard of the present invention.

[0017] Figure labeling: 10, palatal lateral plate; 11, punctate void group; 111, punctate void; 12, elongated slit; 13, reserved window; 14, posterior margin; 15, tissue surface. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0019] It should be noted that the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to direct setup or connection, or indirect setup or connection through centered components or centered structures.

[0020] Furthermore, in embodiments of this invention, terms such as "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" are used to indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, or in a conventional placement or usage state. These terms are merely for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the structures, features, devices, or elements referred to must have a specific orientation or positional relationship, nor that they must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0021] The various specific technical features and embodiments described in the detailed embodiments can be combined in any suitable manner without contradiction. For example, different implementation methods can be formed by combining different specific technical features / embodiments. In order to avoid unnecessary repetition, the various possible combinations of the various specific technical features / embodiments in this invention will not be described separately. Example

[0022] like Figures 1 to 3 As shown, this embodiment provides a palatal guard for intraoperative positioning guidance and postoperative wound protection during maxillary palatal impacted tooth extraction surgery. The palatal guard is an integrated plate-shaped component, which is made of medical resin or similar biocompatible materials by 3D printing. Its overall shape is adapted to the morphology of the patient's maxillary palate and maxillary dentition.

[0023] The palatal splint includes a palatal plate 10, which is a plate-like main structure that fits or substantially fits the maxillary palate. The tissue surface 15 of the palatal plate 10 faces the patient's palatal mucoperiosteum, and the tissue surface 15 matches the mucosal morphology of the maxillary palate. Depending on the postoperative swelling requirements, a gap of approximately 0.2–0.5 mm can be maintained between the tissue surface 15 and the palatal mucosa, or a tight fit can be used. Through the above structural design, the palatal splint can be stably attached to the patient's palatal region, reducing the foreign body sensation caused by traditional clasp structures, and facilitating postoperative coverage and protection of the palatal wound.

[0024] The posterior border 14 of the palatal lateral plate 10 extends to the maxillary tuberosity region. The posterior border 14 is part of the palatal lateral plate 10 and is integrally formed with it. Its extension direction is adapted to the anatomical morphology of the posterior maxilla of the patient. By extending the posterior border 14 to the maxillary tuberosity region, the contact and adaptation range between the palatal plate and the patient's maxillary palate and maxillary dentition can be increased, thereby improving the retention effect of the palatal plate.

[0025] The palatal side plate 10 is provided with a dotted gap group 11, a long strip slit 12 and a reserved window 13. The dotted gap group 11, the long strip slit 12 and the reserved window 13 are all opened on the palatal side plate 10 and form an integrated structure with the palatal side plate 10. The above structures together constitute the intraoperative positioning and guiding structure of the palatal plate. At the same time, the palatal side plate 10 itself also constitutes the postoperative protective plate structure for covering and protecting the wound. Thus, the palatal plate has both the function of an intraoperative guide plate and the function of a postoperative palatal plate. The dotted void group 11 is set on the palatal lateral plate 10 and distributed along the preoperatively designed incision line. The incision line can be designed as a local arc-shaped incision line or a trapezoidal incision line according to the preoperative virtual surgical plan. The dotted void group 11 includes multiple dotted voids 111, and each dotted void 111 is a perforated structure that penetrates the palatal lateral plate 10.

[0026] Each dotted gap 111 has a diameter of approximately 1 mm, and the spacing between adjacent dotted gaps 111 is 2–4 mm. Multiple dotted gaps 111 are arranged sequentially according to the direction of the incision line, so that the dotted gap group 11 as a whole forms a dotted marking trajectory corresponding to the incision line. Since the dotted gaps 111 penetrate the palatal plate 10, after the palatal plate is in place, the doctor can apply a methylene blue marker to the surface of the palatal mucoperiosteum through the dotted gaps 111, thereby forming marking points on the palatal mucoperiosteum corresponding to the preoperatively designed incision line.

[0027] Through the above structural design, the dotted gap group 11 can accurately transfer the incision line designed based on digital data before surgery to the surface of the palatal mucoperiosteum inside the patient's mouth, so that the doctor can cut the palatal mucoperiosteum along the marked trajectory. This structure can reduce the positioning deviation caused by simply relying on experience to determine the incision position, which is conducive to controlling the flap range and providing an accurate initial incision positioning basis for subsequent bone removal and tooth extraction operations through the reserved window 13.

[0028] The elongated slit 12 is located on one side of the palatal plate 10, corresponding to the side of the mucoperiosteal flap that is raised. The elongated slit 12 is a narrow, elongated groove that runs through the palatal plate 10, with a width of approximately 3 mm and a length that matches the preoperatively designed flap elevation range.

[0029] The elongated slit 12 and the dotted gap group 11 are arranged adjacent to each other, both located on the palatal plate 10 at the corresponding surgical area. The dotted gap group 11 is used to mark the incision line, and the elongated slit 12 is used to allow the mucoperiosteal flap to pass through after the palatal mucoperiosteum is cut and raised. In use, the doctor first marks the incision line through the dotted gap group 11, and then cuts the palatal mucoperiosteum along the marked line to form a mucoperiosteal flap that can be raised. Then, the palatal plate is put on again and the raised mucoperiosteal flap is passed through the elongated slit 12, so that the mucoperiosteal flap is guided to the outside of the palatal plate.

[0030] Through the above structural design, the elongated slit 12 can avoid and restrain the everted mucoperiosteal flap when the palatal guard is repositioned, ensuring that the mucoperiosteal flap is not located between the palatal lateral plate 10 and the surgical area bone surface 6, thereby preventing the mucoperiosteal flap from affecting the positioning of the palatal guard. At the same time, after the mucoperiosteal flap protrudes and is located on the outside of the palatal guard, the surgical area bone surface can be fully exposed, facilitating subsequent bone removal and tooth extraction operations through the reserved window 13.

[0031] A reserved window 13 is provided on the palatal lateral plate 10 and is located at a position corresponding to the surface projection of the impacted tooth. The reserved window 13 is an opening structure that penetrates the palatal lateral plate 10, and there can be one or more of them. The specific number is determined according to the number of impacted teeth and their surface projection positions.

[0032] The shape and size of the reserved window 13 are determined based on the tooth contour of the impacted tooth and the extent of bone removal around it obtained by CBCT measurement. The reserved window 13 is usually oval to adapt to the actual shape of the impacted tooth. Its size range is designed according to different tooth conditions and is set individually. The reserved window 13 includes the window edge and the window interior space. The window edge encloses the window interior space.

[0033] The position of the window edge corresponds to the area of ​​bone removal and serves as an inner boundary marker during ultrasonic bone removal. The internal space of the window corresponds to the surface projection of the impacted tooth. After the palatal guard is in place, the internal space of the window is located above the impacted tooth or in the corresponding palatal bone surface area. The surgeon can enter the surgical area through the internal space of the window, remove bone along the area defined by the window edge, expose the impacted tooth, and complete tooth segmentation, extraction, scaling, and irrigation through the internal space of the window.

[0034] Through the above structural design, the reserved window 13 can transform the surface projection and bone removal range determined preoperatively based on the three-dimensional position of the impacted tooth into a solid opening structure on the palatal plate 10. During the operation, the doctor does not need to repeatedly search for the position of the impacted tooth based on experience, but can directly determine the bone removal area based on the reserved window 13, thereby avoiding blindly expanding the flap and bone removal range, reducing damage to adjacent teeth and surrounding important anatomical structures, and improving the accuracy of impacted tooth exposure and extraction operations.

[0035] The palatal guard in this embodiment can be prepared according to the following steps: First, CBCT data of the patient is collected before surgery to obtain the three-dimensional position of the impacted tooth, the position of adjacent teeth, and important anatomical information. Second, an intraoral scanner is used to obtain a digital impression of the patient's maxillary dentition and maxillary palatal mucosa morphology.

[0036] Then, the CBCT data and intraoral scan data are imported into reverse engineering software for three-dimensional registration and fusion. The reverse engineering software can be Mimics, 3-Matic, Geomagic, etc. Through data fusion, the three-dimensional positional relationship of the impacted teeth can be correlated with the surface morphology of the patient's maxillary dentition and maxillary palate.

[0037] Subsequently, the incision line, flap elevation range, bone removal range, and surface projection of the impacted tooth were designed according to the virtual surgical plan. In the digital model, dotted gap groups 11 were generated along the incision line; elongated slits 12 were generated at the corresponding flap elevation positions; and reserved windows 13 were generated at the corresponding surface projections of the impacted tooth. This resulted in a three-dimensional model of a digital palatal guard that simultaneously possessed dotted gap groups 11, elongated slits 12, and reserved windows 13.

[0038] Finally, the 3D model is imported into a 3D printer and printed using medical-grade photosensitive resin or PEEK material. After post-processing and sterilization, it is ready for use. Through the above preparation process, the palatal flap can be personalized according to the individual palatal morphology and impacted tooth position of the patient, so that it can simultaneously meet the functions of positioning marking, flap fixation, bone removal guidance, and postoperative fitting protection.

[0039] When using it, first try wearing the palatal guard in the patient's mouth, so that the tissue surface 15 of the palatal side plate 10 fits or basically fits the patient's maxillary palate, and confirm that the palatal guard is well positioned and there are no obvious pressure points.

[0040] After local or general anesthesia takes effect, the palatal shield is placed in place. Since the overall shape of the palatal shield is adapted to the patient's maxillary palate and maxillary dentition, after the palatal shield is in place, the dotted gap group 11, the elongated slit 12 and the reserved window 13 are respectively located at positions corresponding to the preoperatively designed incision line, flap range and surface projection of the impacted tooth.

[0041] Subsequently, the doctor used a methylene blue marker to mark the surface of the palatal mucoperiosteum through dotted gaps 111, so that multiple dotted marks together form the incision line. After marking, the palatal shield was removed, the palatal mucoperiosteum was cut along the incision line, and the palatal mucoperiosteal flap was flipped up.

[0042] After flap elevation, the palatal flap is repositioned, and the raised mucoperiosteal flap is passed through the elongated slit 12, positioning it on the outside of the palatal flap. At this point, the elongated slit 12 serves to guide and fix the mucoperiosteal flap, ensuring that the palatal flap remains in the pre-designed position while fully exposing the bone surface of the surgical area.

[0043] Next, bone removal and tooth extraction are performed through the pre-reserved window 13. The dentist uses an ultrasonic bone scalpel to remove bone along the area defined by the window edge, gradually exposing the impacted tooth. After exposure, the tooth structure can be divided, the impacted tooth extracted, and the tooth sac scraped as needed. The surgical area is then rinsed with saline solution. Because the position and outline of the pre-reserved window 13 correspond to the surface projection of the impacted tooth and the area of ​​bone removal, this structure can define the area of ​​bone removal and form an operating channel for the extraction instruments.

[0044] After the impacted tooth is extracted, the palatal splint is removed, the mucoperiosteal flap is repositioned and sutured. After the surgery, the palatal splint is worn again and left in place for 3 to 7 days. During this time, the palatal splint covers the palatal wound area to isolate it from food irritation and pressure from the back of the tongue, reducing the possibility of external stimulation to the palatal wound, thereby reducing the risk of incision infection and dehiscence, and promoting postoperative wound healing.

[0045] In this embodiment, the palatal shield integrates the dotted gap group 11, the elongated slit 12, and the reserved window 13 into one unit through the palatal side plate 10, enabling a single device to simultaneously perform the functions of intraoperative positioning guidance and postoperative wound protection. Compared with separately manufacturing intraoperative positioning guides and postoperative palatal shields, this integrated structure can reduce the operational steps and manufacturing costs associated with separately designing, printing, and wearing two devices.

[0046] The dotted gap group 11 is distributed along the preoperatively designed incision line. It can transfer the digitally planned incision trajectory to the surface of the palatal mucoperiosteum by using a methylene blue marker, reducing incision positioning deviation and making the flap incision more consistent with the preoperative design plan.

[0047] The elongated slit 12 is located on the corresponding flap side, allowing the raised mucoperiosteal flap to pass through and be fixed to the outside of the palatal guard, so that the palatal guard can still be in place during the operation, while keeping the bone surface of the surgical area exposed and avoiding the flap tissue from obscuring the surgical area.

[0048] The reserved window 13 is positioned corresponding to the surface projection of the impacted tooth. Its edge serves as a boundary marker for the bone removal area, while the interior space acts as an operating channel for extraction instruments. This structure reduces the need for repeated intraoperative positioning, allows for precise location of the impacted tooth, avoids blindly expanding the bone removal area, and improves the accuracy of exposure and extraction of the impacted tooth.

[0049] After the surgery, the palatal splint continues to be worn and covers the palatal wound area. It can isolate food and pressure from the back of the tongue, reducing the risk of incision infection, dehiscence and poor healing. Because the palatal splint is designed based on intraoral scan data, it fits well with the palatal mucosa and does not require a retainer, which helps to improve wearing comfort and patient compliance.

[0050] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A palatal guard, characterized in that, Includes an integrally formed palatal lateral plate (10), the tissue surface (15) of which is adapted to the morphology of the patient's maxillary palate and maxillary dentition; The palatal plate (10) is provided with a dotted gap group (11), a long strip slit (12) and a reserved window (13). The dotted gap group (11) is arranged along the area corresponding to the preoperatively designed incision line, so that the marking pen can pass through and form an incision mark on the palatal mucoperiosteum; The elongated slit (12) is located on the palatal side plate (10) at the position corresponding to the mucoperiosteal flap being turned up, and is used to allow the turned-up mucoperiosteal flap to pass through; The reserved window (13) is located on the palatal plate (10) at the position corresponding to the surface projection of the impacted tooth, and is used to limit the bone removal range and form a tooth extraction operation channel.

2. A palatal guard according to claim 1, characterized in that, The dotted gap group (11) includes multiple dotted gaps (111) penetrating the palatal lateral plate (10). The multiple dotted gaps (111) are arranged sequentially at intervals along the extension direction of the incision line, so that the dotted gap group (11) forms a dotted marking trajectory corresponding to the incision line.

3. A palatal guard according to claim 1, characterized in that, The elongated slit (12) is a narrow through-slot that runs through the palatal lateral plate (10). The length of the elongated slit (12) matches the flap range designed before surgery. The elongated slit (12) is used to avoid and constrain the mucoperiosteal flap when the palatal lateral plate (10) is in place, so as to expose the bone surface of the surgical area.

4. A palatal guard according to claim 3, characterized in that, The elongated slit (12) is arranged adjacent to the dotted gap group (11) and is located on one side of the surgical area on the palatal lateral plate (10).

5. A palatal guard according to claim 1, characterized in that, The reserved window (13) is an opening structure that penetrates the palatal lateral plate (10). The reserved window (13) includes a window edge and an internal space formed by the window edge. The window edge corresponds to the bone removal range, and the internal space corresponds to the surface projection of the impacted tooth.

6. A palatal guard according to claim 5, characterized in that, The shape of the reserved window (13) is determined according to the outline of the impacted tooth and the extent of bone removal around it, and the reserved window (13) is an elliptical opening.

7. A palatal guard according to claim 1, characterized in that, The posterior edge (14) of the palatal lateral plate (10) extends to the maxillary tuberosity region to increase the fit and retention range between the palatal lateral plate (10) and the patient's maxillary palate.

8. A palatal guard according to claim 1, characterized in that, The tissue surface (15) of the palatal lateral plate (10) matches the mucosal morphology of the patient's maxillary palate, and the tissue surface (15) is closely attached to the palatal mucosa.

9. A palatal guard according to claim 1, characterized in that, The palatal lateral plate (10), dotted gap group (11), elongated slit (12) and reserved window (13) are formed by 3D printing of a three-dimensional model based on the fusion of the patient's CBCT data and intraoral scan data. The palatal lateral plate (10) is made of medical-grade photosensitive resin or PEEK material.

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