A guide plate for extracting a mandibular impacted wisdom tooth and a manufacturing method thereof

Abstract

The application discloses a guide plate for extracting a mandibular impacted wisdom tooth and a manufacturing method thereof, and belongs to the technical field of oral surgery and mandibular impacted wisdom tooth extraction. The guide plate comprises a pressing mold holder, a guide inclined surface and a holder guide plate. Firstly, a curved surface tomogram of a patient's oral structure is obtained and corresponding labeling is performed, and a suitable cutting line B is designed; then, a pressing mold and a mold are taken from the oral plaster model, and then the plaster model is trimmed, the guide inclined surface is cut on the plaster model, and the pressing mold holder is pressed out; finally, resin is stacked on the lower surface of the pressing mold holder to complete the manufacturing of the guide plate. The guide plate is helpful to improve the operation precision, and can be designed and adjusted according to the oral condition of the patient and the type of the impacted wisdom tooth, help to form a standardized operation for different types of wisdom teeth, and help oral professional medical students and young doctors to quickly master the skill of segmenting impacted teeth.

Description

Technical Field

[0001] This invention relates to the technical field of oral surgery and the extraction of impacted mandibular wisdom teeth, specifically to a guide plate for extracting impacted mandibular wisdom teeth and its manufacturing method. Background Technology

[0002] Extraction of impacted mandibular wisdom teeth is a significant technical challenge in the field of oral surgery. As the last teeth to erupt in the mouth, wisdom teeth are particularly complex due to their deep location, complex anatomy, and the various types of impaction they may exhibit (such as vertical impaction, mesial impaction, and horizontal impaction). Traditional extraction methods often rely on the surgeon's experience and touch, making it difficult to precisely control the surgical path and force, thus increasing surgical risks and patient discomfort.

[0003] With the continuous development of medical technology, especially the introduction of digital dentistry and oral surgical navigation technology, the precision and safety of mandibular impacted wisdom tooth extraction have been significantly improved. These new technologies provide doctors with more intuitive and accurate surgical guidance through precise imaging measurements, 3D modeling, and surgical simulation, making the surgical process more standardized and regulated. However, even with the assistance of digital technology, the extraction of mandibular impacted wisdom teeth still relies on the doctor's experience and adaptability. This results in lower surgical precision when facing complex oral cavity conditions and various types of wisdom teeth, and makes it impossible to standardize procedures for different types of wisdom teeth.

[0004] In clinical practice, when dental students learn to extract impacted teeth under the guidance of their instructors, they often struggle to grasp the techniques for dividing teeth as explained verbally by their teachers. This results in their inability to efficiently and quickly divide teeth to remove coronal resistance. Young dentists also frequently face the same problem, creating an urgent need for a standardized training tool—the dental guide—to help medical students deeply and simply understand the techniques for dividing teeth!

[0005] Therefore, there is a need for a surgical guide and its fabrication method that can effectively improve surgical precision, help form standardized procedures for different types of wisdom teeth, and help medical students and young doctors quickly and efficiently master the method of segmenting impacted teeth. Summary of the Invention

[0006] To address the problems mentioned in the background section, this invention provides a guide plate for extracting impacted mandibular wisdom teeth and its fabrication method. This solves the problems of low surgical precision and the inability to standardize procedures for different types of wisdom teeth in current oral surgery and mandibular impacted wisdom tooth extraction techniques. Most importantly, it addresses the issue of dental students and young dentists often failing to quickly master the techniques of segmenting impacted teeth, causing patients unseen pain.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] Firstly, a guide plate for extracting impacted mandibular wisdom teeth, comprising:

[0009] A compression mold retainer, the shape of which is adapted to the patient's oral cavity structure;

[0010] A guide ramp is provided between the upper and lower surfaces of the compression mold holder and is arranged along the direction of the dividing line B to guide surgical instruments.

[0011] A retainer guide plate is disposed on the upper surface of the compression mold retainer, and its plane is parallel to reference line A, which is used to accurately locate the position of the impacted wisdom tooth.

[0012] The reference line A is a horizontal straight line that brings the most prominent buccal cusps of each tooth as close as possible to each other; the cutting line B is a straight line that intersects the impacted wisdom tooth and is used to indicate the tooth segmentation path of the impacted wisdom tooth.

[0013] Based on the aforementioned guide plate for extracting impacted mandibular wisdom teeth, in one feasible design, the impression retainer includes an S-region made of resin material to accommodate different patients' oral structures.

[0014] Based on the aforementioned guide plate for extracting impacted mandibular wisdom teeth, in one feasible design, the guide ramp is located on the distal ramp of the S region, and the ramp depth and ramp width of the guide ramp are adapted to the impacted wisdom tooth.

[0015] Based on the aforementioned guide plate for extracting impacted mandibular wisdom teeth, in one feasible design, the retainer guide plate is connected to the guide ramp to provide a precise guiding path for surgical instruments.

[0016] Secondly, the present invention provides a method for manufacturing a guide plate for extracting impacted mandibular wisdom teeth, the method comprising:

[0017] Obtain and annotate curved surface tomographic sections;

[0018] Design appropriate cutting lines B according to different types of impacted teeth;

[0019] The patient's oral cavity model is obtained from the curved tomographic film, and a plaster model is pressed out using the oral cavity model.

[0020] Trim the plaster model, cut a guide bevel between the upper and lower surfaces of the plaster model, and use an angle measuring ruler to guide the pressing of the pressure film retainer on the guide bevel.

[0021] Resin is deposited on the lower surface of the pressure film retainer to form a retainer guide plate.

[0022] Based on the above-described method for fabricating a guide plate for extracting impacted mandibular wisdom teeth, in one feasible design, obtaining and annotating curved tomographic sections includes:

[0023] X-ray scans and images of the patient's teeth and jawbone are used to generate curved tomographic images of the corresponding locations.

[0024] Mark points a and b on the generated curved surface tomographic slice;

[0025] Based on the positions of points a and b, the horizontal distance D1 between points a and b is obtained, and D1 and the reference line C are marked on the curved surface tomographic section.

[0026] Determine the oral cavity space as shown on the curved tomographic radiograph, determine the required surgical instruments, and adjust D1 according to the oral cavity space and surgical instruments.

[0027] Point a is the starting point of the buccal groove of the second mandibular molar on the occlusal surface on the mandibular tooth adjacent to the impacted wisdom tooth, that is, the most concave point between the mesial buccal cusp and the distal buccal cusp on the curved tomographic image; point b is the first intersection of the cutting line B on the curved tomographic image and the impacted wisdom tooth, close to the reference line A; the reference line C is a horizontal straight line that passes through point b and is parallel to the reference line A.

[0028] Based on the above-described method for fabricating a guide plate for extracting impacted mandibular wisdom teeth, in one feasible design, a suitable cutting line B is designed according to the different conditions of the impacted teeth, including:

[0029] Based on the determined position of point b, a cutting line B is designed on the curved tomographic section, passing through point b.

[0030] Based on the oral cavity space shown on the curved tomographic radiograph, determine the type of impacted wisdom tooth;

[0031] The cutting line B is adjusted adaptively according to different types of impacted wisdom teeth to ensure that the angle α formed by the intersection of the cutting line B and the reference line A is less than 90°. The angle α is the angle of the guide slope, and the position of point c is determined according to the adjusted cutting line B.

[0032] The impacted wisdom tooth types include vertically impacted wisdom teeth, mesial impacted wisdom teeth, and horizontally impacted wisdom teeth; point c is the second intersection of the cutting line B on the curved tomographic section and the impacted wisdom tooth, far from the reference line A.

[0033] Based on the above-described method for fabricating a guide plate for extracting impacted mandibular wisdom teeth, in one feasible design, the plaster model is trimmed, a guide bevel is cut between the upper and lower surfaces of the plaster model, and a pressure retainer is pressed out on the guide bevel using an angle measuring ruler, including:

[0034] Repairing the plaster model;

[0035] Determine the cutting direction based on the cutting line B, ensuring that the angle between this direction and the reference line A is α;

[0036] The guide slope is cut according to the angle α of the guide slope designed on the curved tomographic section;

[0037] The required guide slope depth D3 is determined based on the oral cavity space shown on the curved tomographic radiograph;

[0038] Z350 resin material is injected into the S region inside the plaster model through a guide bevel and shaped to form a pressure film retainer.

[0039] Based on the above-described method for fabricating a guide plate for extracting impacted mandibular wisdom teeth, in one feasible design, resin is deposited on the lower surface of a pressure-film retainer to form a retainer guide plate, comprising:

[0040] Based on the position of the mold retainer, a retainer guide plate is designed on the curved tomographic sheet;

[0041] According to the designed retainer guide plate, resin is deposited on the upper surface of the compression mold retainer to form the retainer guide plate;

[0042] The guide bevel is opened at the corresponding position on the retainer guide plate.

[0043] Based on the above-described method for fabricating a guide plate for extracting impacted mandibular wisdom teeth, in one feasible design, after the retainer guide plate is installed, the method further includes:

[0044] Obtain the vertical distance D4 between the retainer guide plate and reference line A;

[0045] D4 is adjusted according to the mouth opening degree of different patients, with a minimum value of 0;

[0046] Mark the defined D4 and horizontal line D on the curved tomographic section;

[0047] The vertical distance D2 between reference line A and reference line C is obtained based on the markings on the curved tomographic section, and compared with D4 to determine the size relationship between the two.

[0048] The mold retainer is adaptively adjusted according to the relationship between D2 and D4.

[0049] Wherein, the horizontal line D is a horizontal straight line drawn from the plane where the retainer guide plate is located, parallel to the reference line A.

[0050] Beneficial effects:

[0051] (1) The guide plate disclosed in this invention for extracting impacted mandibular wisdom teeth includes a mold retainer, a guide ramp, and a retainer guide plate. This guide plate is designed according to the patient's specific oral condition and the type of impacted wisdom tooth. Its structure is adjustable. The mold retainer adapts to the patient's oral structure. The guide ramp is positioned between the upper and lower surfaces of the mold retainer and along the direction of the dividing line B to guide surgical instruments. The retainer guide plate is positioned on the upper surface of the mold retainer, and its plane is parallel to the reference line A to accurately locate the impacted wisdom tooth. Through the adaptive design of the mold retainer, the guide ramp positioned along the cutting line B, and the retainer guide plate that aids in positioning, this guide plate provided by the present invention can guide surgical instruments along a predetermined path, reducing errors during the surgical process and improving surgical precision. Furthermore, because it can be adaptively adjusted according to the pre-obtained oral structure, it can also help form standardized procedures for different types of wisdom teeth. Furthermore, this technique can help dental students and young dentists quickly master the skill of segmenting impacted teeth. Preparing this guide before surgery allows for faster and more efficient wisdom tooth segmentation, shortening extraction time and reducing unnecessary patient discomfort. Moreover, creating this guide does not require CT scans or sophisticated equipment, thus avoiding the additional radiation risks associated with CT scans and facilitating the widespread adoption of this technique. This method significantly conserves medical resources.

[0052] (2) The method for fabricating a guide plate for extracting impacted mandibular wisdom teeth disclosed in this invention first involves obtaining a curved tomographic radiograph of the patient's oral structure and marking it accordingly. Then, a suitable cutting line B is designed based on the different types of impacted teeth. Subsequently, an oral model of the patient is obtained based on the curved tomographic radiograph, and a plaster model is pressed out using the oral model. A guide bevel is then cut between the upper and lower surfaces of the plaster model, the plaster model is trimmed, and a pressure retainer is pressed out on the guide bevel using an angle measuring ruler. Resin is then deposited on the lower surface of the pressure retainer to complete the fabrication of the guide plate. This method of fabricating a guide plate, when used in oral medicine, helps improve the precision of the surgery and can be designed and adjusted according to the patient's oral condition and the type of impacted wisdom tooth, helping to form a standardized procedure for dealing with different types of wisdom teeth. Attached Figure Description

[0053] Figure 1 This is a schematic diagram of a curved tomographic section of a vertically impacted wisdom tooth in this invention;

[0054] Figure 2 This is a schematic diagram of a curved tomographic section of a mesial impacted wisdom tooth in this invention;

[0055] Figure 3 This is a schematic diagram of a curved tomographic section of a horizontally impacted wisdom tooth in this invention.

[0056] Figure 4 This is a schematic diagram showing the installation position of the guide plate in this invention;

[0057] Figure 5 This is a schematic diagram of the process for manufacturing the guide plate in this invention. Detailed Implementation

[0058] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0059] It should be understood that although the terms first, second, etc., may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, a first unit may be referred to as a second unit, and similarly, a second unit may be referred to as a first unit, without departing from the scope of the exemplary embodiments of the invention.

[0060] It should be understood that the term "and / or" that may appear in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" that may appear in this document describes another relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " that may appear in this document generally indicates that the related objects before and after it are in an "or" relationship.

[0061] Example 1:

[0062] This embodiment provides a guide plate for extracting impacted mandibular wisdom teeth. It adopts the concept of adaptive adjustment and "design first, then operate". It is designed according to the patient's specific oral condition and the type of impacted wisdom tooth. Its structure is adjustable, which effectively improves the precision of the operation and can help form a standardized operation for dealing with different types of wisdom teeth.

[0063] like Figure 1-5 As shown in this embodiment, a guide plate for extracting impacted mandibular wisdom teeth includes a retainer, a guide ramp, and a retainer guide plate. The retainer is designed based on the actual condition of the patient's oral cavity, ensuring it adapts to the impacted wisdom tooth and surrounding tissues during surgery, improving the accuracy and success rate of the procedure. In practical applications, the retainer's adaptive design to the patient's oral structure also considers the protection of surrounding teeth and tissues. Precise size and shape control based on the outline of surrounding teeth reduces damage to surrounding tissues during surgery and promotes postoperative recovery. Furthermore, because the retainer allows the surgeon to find the placement position more quickly and accurately during surgery, it reduces the number of adjustments and corrections during the procedure, lowers the difficulty of the operation, and significantly shortens the surgery time.

[0064] The guide ramp is positioned between the upper and lower surfaces of the impression retainer and along the direction of the dividing line B (a straight line intersecting the impacted wisdom tooth, used to indicate the tooth segmentation path). It guides surgical instruments. Specifically, the dividing line B, pre-designed according to the patient's oral structure and different types of impacted teeth, provides the direction for the guide ramp. The guide ramp provides a reasonable and precise path for the surgical instruments, ensuring they can accurately enter and act on the impacted wisdom tooth, thus avoiding damage to surrounding healthy teeth and tissues. Furthermore, the guide ramp allows the surgeon to more precisely control the direction and depth of the instruments, improving surgical accuracy and success rate. This is particularly important for extracting impacted wisdom teeth in complex or difficult-to-access locations. In practical applications, the guide ramp also reduces the blindness and uncertainty during surgery, lowering surgical risks. Surgeons can perform precise surgical operations, reducing complications caused by improper operation.

[0065] The controller guide plate is located on the upper surface of the impression retainer. Its plane is aligned with a horizontal straight line as close as possible to the most prominent buccal cusp of each tooth, parallel to reference line A. This guide plate is used to precisely locate the impacted wisdom tooth. Through its specific design and installation position, it can be accurately positioned on the impacted wisdom tooth requiring extraction within the patient's mouth. This helps the dentist find the operating position more accurately during surgery, reducing the risk of misoperation.

[0066] By combining a mold retainer, a guide ramp, and a retainer guide plate, and continuously adjusting them, a guide plate for extracting impacted mandibular wisdom teeth is ultimately formed. This guide plate can guide surgical instruments along a predetermined path, reducing errors during the procedure and improving surgical precision. Furthermore, because it can adaptively adjust to pre-observed oral structures, it can also help to establish standardized procedures for handling different types of wisdom teeth.

[0067] This embodiment provides a guide plate for extracting impacted mandibular wisdom teeth. As a preferred embodiment, the impression retainer includes an S region, which can be set as a T-shaped empty region. A guide slope is formed at its distal position. The T-shaped empty region is filled with resin material. The resin material has high plasticity and is easy to adapt to, so as to adapt to the oral structure of different patients.

[0068] This embodiment provides a guide plate for extracting impacted mandibular wisdom teeth. As a preferred embodiment, the guide ramp extends through the upper and lower surfaces of the S region, and the retainer guide plate is connected to the guide ramp. This is used to provide a precise guiding path for surgical instruments, which can further help the doctor find the operation position and the entry position of the surgical instruments. Moreover, the ramp depth and ramp width are adapted to the impacted wisdom tooth, which can also ensure that it is more in line with the actual oral condition and needs of the patient.

[0069] Example 2:

[0070] like Figure 1-5 As shown, this embodiment provides a method for fabricating a guide plate for extracting impacted mandibular wisdom teeth, used to fabricate any of the guide plates for extracting impacted mandibular wisdom teeth in Embodiment 1. During fabrication, continuous adaptive adjustments are required to ensure that the final fabricated guide plate meets the requirements of Embodiment 1. The method for fabricating the guide plate provided in this embodiment may include, but is not limited to, the following steps:

[0071] S100. Obtain and annotate the curved surface tomographic sections.

[0072] Specifically, step S100 includes:

[0073] S1001. Use X-ray scanning to photograph the patient's teeth and jawbone, and generate curved tomographic films at the corresponding locations.

[0074] In step S1001, X-ray scanning and imaging of the patient's teeth and jawbone are used, employing digital oral medicine technology to facilitate doctors in clearly understanding the condition and structure of the patient's oral cavity from the generated curved tomographic images.

[0075] S1002. Mark points a and b on the generated curved surface tomographic slice.

[0076] S1003. Based on the positions of points a and b, obtain the horizontal distance D1 between points a and b, and mark D1 and the reference line C on the curved surface tomographic section.

[0077] In steps S1002 and S1003, points a and b are marked, and the horizontal distance D1 between points a and b is obtained. This is to prepare for determining the cutting line B in subsequent operations.

[0078] S1004. Determine the oral cavity space as shown on the curved tomographic film, determine the required surgical instruments, and adjust D1 according to the oral cavity space and surgical instruments.

[0079] In step S1004, D1 is adjusted according to the oral cavity space and surgical instrument conditions. This is to provide an optimal space scheme for the surgeon to perform the operation during the operation. When adjusting D1, point a is fixed and cannot be changed. Therefore, it is only necessary to change the position of point b in the curved tomographic section.

[0080] Point a is the starting point of the buccal groove of the second mandibular molar on the occlusal surface on the mandibular tooth (7th tooth) adjacent to the impacted wisdom tooth, that is, the most concave point between the mesial buccal cusp and the distal buccal cusp on the curved tomographic image; point b is the first intersection of the cutting line B on the curved tomographic image and the impacted wisdom tooth, close to the reference line A; the reference line C is a horizontal straight line that passes through point b and is parallel to the reference line A.

[0081] S200. Design appropriate cutting lines B according to different types of impacted teeth.

[0082] Specifically, step S200 includes:

[0083] S2001. Based on the determined position of point b on the curved tomographic section, design a cutting line B passing through point b.

[0084] S2002. Determine the type of impacted wisdom tooth based on the oral cavity space shown on the curved tomographic radiograph.

[0085] In step S2002, impacted wisdom teeth are generally classified into three types: vertical impaction, mesial impaction, and horizontal impaction. The appropriate judgment can be made based on the oral cavity space shown on the tomographic radiograph.

[0086] S2003. Adjust the cutting line B according to the different types of impacted wisdom teeth, and ensure that the angle α formed by the intersection of the cutting line B and the reference line A is less than 90°. Determine the position of point c based on the adjusted cutting line B.

[0087] In step S2003, the cutting line B is adaptively adjusted according to different types of impacted wisdom teeth. Specifically, in the case of vertical impaction, point b is the starting point of the buccal groove of the mandibular second molar on the occlusal surface, that is, the most concave point between the mesial buccal cusp and the distal buccal cusp on the panoramic radiograph, and point c is set as the most convex point of the root bifurcation of the impacted tooth (8th tooth). Points b and c form the cutting line B (which can be finely adjusted according to the actual situation). In the case of mesial impaction, point b is the point 1.5 mm away from point e, the most convex point of the distal buccal cusp on the crown of the mandibular second molar, and point c is selected according to the principle that the angle α formed by the intersection of the cutting line B and the reference line A is less than 90°. In the case of horizontal impaction, the selection of points b and c is the same as that of mesial impaction, and both need to be determined with the help of point e. It is important to note that, regardless of the type of impacted wisdom tooth, when selecting the specific angle α formed by the intersection of the cutting line B and the reference line A, in order to avoid the design of the cutting line affecting the tooth structure of the 7th tooth, it is generally necessary to ensure that there is at least a 2mm distance between the cutting line and the most convex point of the root surface of the 7th tooth.

[0088] Furthermore, depending on the actual impacted tooth situation, multiple cutting lines B can be set to facilitate surgical procedures and reduce patient discomfort, all of which need to meet the requirements for cutting line B in this embodiment. Determining the cutting line B allows for the determination of the direction for the subsequent setting of the guiding slope.

[0089] S300. Obtain the patient's oral cavity model based on the curved tomographic film, and use the oral cavity model to press out a plaster model.

[0090] S400. Trim the plaster model, cut a guide bevel between the upper and lower surfaces of the plaster model, and use an angle measuring ruler to guide the pressing of the pressure film retainer on the guide bevel.

[0091] In this process, a rough tooth shape can be constructed at the location of the impacted wisdom tooth. This is to determine the distance between the cutting point in the anterior-posterior direction and the reference tooth (the 7th or 6th tooth). It should be noted that the guiding slope is set at the distal position, forming a distal slope. The guiding slope has a certain thickness, preferably 4mm.

[0092] Specifically, step S400 includes:

[0093] S4001. Repairing plaster models.

[0094] In step S4001, the plaster model is modified by grinding a serrated design on the pressed plaster model to increase the retention force, and the plaster is removed in the area where the wisdom tooth is located, with the removal depth needing to be greater than 0 mm.

[0095] S4002. Determine the cutting direction based on the cutting line B, ensuring that the angle between this direction and the reference line A is α.

[0096] S4003. Cut out the guide slope according to the angle α of the guide slope designed on the curved tomographic section.

[0097] In steps S4002 and S40032, drilling is performed according to the direction of the previously confirmed cutting line B drawn on the curved tomographic section to ensure that the guide bevel can achieve the expected effect and facilitate the entry of surgical instruments.

[0098] S4004. Determine the required guide ramp depth D3 based on the oral cavity space shown on the curved tomographic radiograph.

[0099] In step S4004, determining the depth D3 of the guide slope also determines the required height of the compression mold retainer. A horizontal straight line parallel to the reference line A can be drawn from its lower surface and designated as the horizontal line E. This line is marked on the curved tomographic film to help determine the size of the compression mold retainer and facilitate reference during surgery.

[0100] S4005. Z350 resin material is injected into the S region inside the plaster model through the guide bevel and shaped to form a pressure film retainer.

[0101] In step S4005, Z350 resin material is injected and shaped into the inner side of the plaster model using a guide bevel. With the help of a metal protractor, a T-shaped area with a distal bevel can be directly constructed at the end of the plaster model using Z350 resin to form a pressure retainer. Specifically, the two sides of the guide bevel are defined at an angle α using a metal protractor (precise measurement with a metal protractor ensures the accurate position and direction of the guide bevel, aiding in the subsequent extraction of impacted wisdom teeth); and thermoplastic Z350 resin is injected along the metal protractor towards the inner edge (S-shaped area) to form a T-shaped structure. Alternatively, the plaster model in the S-shaped area inside the plaster model can be removed directly, and a T-shaped S-shaped area can be constructed in this location using Z350 resin. Z350 resin was chosen here because it has excellent physical properties and aesthetic effects, such as high strength, good wear resistance, stain resistance, and natural tooth color, making it very suitable for the fabrication of the guide plate in this embodiment.

[0102] S500. Resin is deposited on the lower surface of the pressure film retainer to form a retainer guide plate.

[0103] Specifically, step S500 includes:

[0104] S5001. Based on the position of the mold retainer, design a retainer guide plate on the curved tomographic plate.

[0105] S5002. Based on the designed retainer guide plate, resin is deposited on the upper surface of the compression mold retainer to form the retainer guide plate.

[0106] S5003. Open the corresponding position of the guide ramp on the retainer guide plate and grind off the mold retainer part of the far-center guide ramp.

[0107] Furthermore, after completing the S500, corresponding adjustments can be made, specifically:

[0108] Obtain the vertical distance D4 between the retainer guide plate and reference line A;

[0109] D4 is adjusted according to the mouth opening degree of different patients, with a minimum value of 0;

[0110] Mark the defined D4 and horizontal line D on the curved tomographic section;

[0111] The vertical distance D2 between reference line A and reference line C is obtained based on the markings on the curved tomographic section, and compared with D4 to determine the size relationship between the two.

[0112] The mold retainer is adjusted adaptively based on the relationship between D2 and D4.

[0113] Adaptive adjustment of the impression retainer involves adjusting the impression retainer based on the comparison results; and grinding away excess tooth structure in the crown of the tooth above the impression retainer until D2 = D4.

[0114] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A guide plate for extracting impacted mandibular wisdom teeth, characterized in that, include: A compression mold retainer, the shape of which is adapted to the patient's oral cavity structure; A guide ramp is provided between the upper and lower surfaces of the compression mold holder and is arranged along the direction of the dividing line B to guide surgical instruments. A retainer guide plate is disposed on the upper surface of the compression mold retainer, and its plane is parallel to reference line A, which is used to accurately locate the position of the impacted wisdom tooth. The reference line A is a horizontal straight line that brings the most prominent buccal cusps of each tooth as close as possible to each other; the cutting line B is a straight line that intersects the impacted wisdom tooth and is used to indicate the tooth segmentation path of the impacted wisdom tooth.

2. The guide plate for extracting impacted mandibular wisdom teeth according to claim 1, characterized in that, The compression mold retainer includes an S-region made of resin material to accommodate different patients' oral structures.

3. The guide plate for extracting impacted mandibular wisdom teeth according to claim 2, characterized in that, The guiding ramp is located on the distal ramp of the S region, and the ramp depth and ramp width of the guiding ramp are adapted to the impacted wisdom tooth.

4. The guide plate for extracting impacted mandibular wisdom teeth according to claim 1, characterized in that, The retainer guide plate is connected to the guide ramp and is used to provide a precise guide path for the surgical instruments.

5. A method for manufacturing a guide plate for extracting impacted mandibular wisdom teeth, characterized in that, The method for fabricating a guide plate for extracting impacted mandibular wisdom teeth as described in any one of claims 1 to 4 comprises: Obtain and annotate curved surface tomographic sections; Design appropriate cutting lines B according to different types of impacted teeth; The patient's oral cavity model is obtained from the curved tomographic film, and a plaster model is pressed out using the oral cavity model. Trim the plaster model, cut a guide bevel between the upper and lower surfaces of the plaster model, and use an angle measuring ruler to guide the pressing of the pressure film retainer on the guide bevel. Resin is deposited on the lower surface of the pressure film retainer to form a retainer guide plate.

6. The method for manufacturing a guide plate for extracting impacted mandibular wisdom teeth according to claim 5, characterized in that, Obtain and annotate the curved surface tomographic sections, including: X-ray scans and images of the patient's teeth and jawbone are used to generate curved tomographic images of the corresponding locations. Mark points a and b on the generated curved surface tomographic slice; Based on the positions of points a and b, the horizontal distance D1 between points a and b is obtained, and D1 and the reference line C are marked on the curved surface tomographic section. Determine the oral cavity space as shown on the curved tomographic radiograph, determine the required surgical instruments, and adjust D1 according to the oral cavity space and surgical instruments. Point a is the starting point of the buccal groove of the second mandibular molar on the occlusal surface on the mandibular tooth adjacent to the impacted wisdom tooth, that is, the most concave point between the mesial buccal cusp and the distal buccal cusp on the curved tomographic image; point b is the first intersection of the cutting line B on the curved tomographic image and the impacted wisdom tooth, close to the reference line A; the reference line C is a horizontal straight line that passes through point b and is parallel to the reference line A.

7. The method for manufacturing a guide plate for extracting impacted mandibular wisdom teeth according to claim 5, characterized in that, Design appropriate cutting lines B according to different impacted tooth conditions, including: Based on the determined position of point b, a cutting line B is designed on the curved tomographic section, passing through point b. Based on the oral cavity space shown on the curved tomographic radiograph, determine the type of impacted wisdom tooth; The cutting line B is adjusted adaptively according to different types of impacted wisdom teeth to ensure that the angle α formed by the intersection of the cutting line B and the reference line A is less than 90°. The angle α is the angle of the guide slope, and the position of point c is determined according to the adjusted cutting line B. The impacted wisdom tooth types include vertically impacted wisdom teeth, mesial impacted wisdom teeth, and horizontally impacted wisdom teeth; point c is the second intersection of the cutting line B on the curved tomographic section and the impacted wisdom tooth, far from the reference line A.

8. The method for manufacturing a guide plate for extracting impacted mandibular wisdom teeth according to claim 5, characterized in that, Trim the plaster model, cut a guide bevel between the upper and lower surfaces of the plaster model, and use an angle measuring ruler to guide the pressing of the pressure mold retainer on the guide bevel, including: Repairing the plaster model; Determine the cutting direction based on the cutting line B, ensuring that the angle between this direction and the reference line A is α; The guide slope is cut according to the angle α of the guide slope designed on the curved tomographic section; The required guide slope depth D3 is determined based on the oral cavity space shown on the curved tomographic radiograph; Z350 resin material is injected into the S region inside the plaster model through a guide bevel and shaped to form a pressure film retainer.

9. The method for manufacturing a guide plate for extracting impacted mandibular wisdom teeth according to claim 5, characterized in that, Resin is deposited on the lower surface of the pressure film retainer to form a retainer guide plate, including: Based on the position of the mold retainer, a retainer guide plate is designed on the curved tomographic sheet; According to the designed retainer guide plate, resin is deposited on the upper surface of the compression mold retainer to form the retainer guide plate; The guide ramp is opened at the corresponding position on the retainer guide plate, and the mold retainer portion of the far-center guide ramp is ground off.

10. The method for manufacturing a guide plate for extracting impacted mandibular wisdom teeth according to claim 5, characterized in that, After completing the retainer guide plate setup, the method further includes: Obtain the vertical distance D4 between the retainer guide plate and reference line A; D4 is adjusted according to the mouth opening degree of different patients, with a minimum value of 0; Mark the defined D4 and horizontal line D on the curved tomographic section; The vertical distance D2 between reference line A and reference line C is obtained based on the markings on the curved tomographic section, and compared with D4 to determine the size relationship between the two. The mold retainer is adaptively adjusted according to the relationship between D2 and D4. Wherein, the horizontal line D is a horizontal straight line drawn from the plane where the retainer guide plate is located, parallel to the reference line A.

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