Periodontal regeneration surgery instrument and positioning device based on periodontal disease large model

Abstract

This invention provides a periodontal regeneration surgical instrument and positioning device based on a large-scale periodontal disease model, belonging to the field of dental surgical instrument technology. It includes a personalized positioning unit and an intelligent surgical instrument. The positioning unit has a slot and guide groove that conform to the patient's dentition for physical navigation. The surgical instrument includes an operating unit, a working unit, and a dual-drive unit. The operating unit has a built-in main control unit that can receive parameters from the large-scale model and combine them with sensor feedback to achieve adaptive debridement and force control protection. This invention achieves precise instrument positioning through the cooperation of the positioning post and guide groove, and completes debridement and regenerative material filling using the same working unit, avoiding secondary damage caused by frequent instrument changes. This application realizes minimally invasive, precise, and intelligent periodontal surgery, effectively solving the technical problems of traditional surgery relying on manual touch, incomplete debridement, and inaccurate filling.

Description

Technical Field

[0001] This invention relates to the field of dental surgical instruments, and in particular to a periodontal regeneration surgical instrument and positioning device based on a large model of periodontal disease. Background Technology

[0002] Periodontitis is one of the leading causes of tooth loss in adults, and its pathological features are mainly characterized by periodontal pocket formation, alveolar bone resorption, and loss of periodontal attachment. Periodontal regeneration surgery is an important means of treating severe periodontitis and restoring the morphology and function of periodontal tissues. In current clinical treatment, periodontal regeneration surgery usually includes steps such as flap elevation, lesion debridement (removal of tartar and granulation tissue), root surface smoothing, and implantation of bone grafts or biofilms.

[0003] However, traditional periodontal debridement and regeneration surgery relies heavily on the dentist's visual observation and tactile feedback. Due to the complex internal environment of the periodontal pocket and limited field of vision, dentists find it difficult to accurately determine the specific depth and shape of lesions (such as deep calculus and the boundaries of bone defects). This highly subjective approach easily leads to incomplete debridement (resulting in recurrence due to residual lesions) or excessive ablation (damaging healthy cementum and bone tissue), making it difficult to achieve truly minimally invasive and precise treatment. In addition, in traditional regenerative surgery, debridement instruments (such as curettes and ultrasonic working tips) and material delivery instruments (such as bone powder delivery devices) are independent of each other. After debridement, the surgeon needs to frequently change instruments to fill with bone powder or biomaterials. This repeated instrument insertion and removal not only prolongs the operation time and increases patient mouth-opening fatigue, but also easily disturbs the cleaned wound during instrument changes, and may even lead to loss of regenerative material or inaccurate filling position during delivery, seriously affecting the expected results of periodontal regeneration. Furthermore, because each patient's dentition morphology and periodontal lesions are different, universal surgical instruments are difficult to adapt to all cases. Current technology lacks a physical navigation device that can be personalized by combining preoperative imaging data (such as CBCT), making it difficult to accurately reproduce the preoperatively planned surgical path during surgery, thus limiting the practical application of digital medical technology in the field of periodontal regeneration.

[0004] In conclusion, how to combine artificial intelligence large-scale model technology to develop a periodontal regeneration surgical system that can achieve precise preoperative planning, real-time intelligent feedback during surgery, and integrate debridement and filling functions is a technical problem that urgently needs to be solved in the field of dental medical devices. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a periodontal regeneration surgical instrument and positioning device based on a large-scale periodontal disease model, specifically comprising: The positioning part consists of a maxillary positioning component or a mandibular positioning component. The maxillary positioning component or the mandibular positioning component has a slot inside, and the two are fixed to the outer side of the upper teeth or lower teeth respectively through the slot. The maxillary positioning component or the mandibular positioning component has a number of guide grooves arranged linearly along the arc surface facing outward. The axis of the guide grooves points vertically from the teeth to the gums.

[0006] Preferably, the maxillary positioning member or the mandibular positioning member has an installation groove on its outward-facing arc-shaped surface; a sliding member is provided on the installation groove and slides along the installation groove; the guide groove is provided on the sliding member.

[0007] Preferably, the slot of the maxillary positioning device or the mandibular positioning device is customized according to the scanning imaging results of the patient's tooth arrangement, so that the slot of the maxillary positioning device or the mandibular positioning device completely matches the patient's tooth arrangement; the maxillary positioning device or the mandibular positioning device can be made in 3D.

[0008] This invention also provides a periodontal regeneration surgical instrument based on a large model of periodontal disease, comprising: The operating unit comprises a mounting end and a handle end with an internal cavity. The mounting end houses a first drive unit and a second drive unit. The first drive unit consists of a mounting box, a main control unit, and a first drive component. The main control unit is placed inside the mounting box and is electrically connected to the first drive component, controlling its start / stop and rotation speed. An L-shaped working unit has a connecting end and a working end. The connecting end is connected to the output end of the first drive component, causing the working end to swing under the drive of the first drive component. The second drive unit consists of a delivery pump and is detachably connected to the mounting end. The input end of the delivery pump points into the cavity inside the handle end, and the output end of the delivery pump is connected to an output pipe, with the end of the output pipe furthest from the delivery pump pointing towards the working end. A storage section, consisting of a material box, is placed inside the cavity inside the handle end. The output port of the material box is connected to the input end of the delivery pump. Preferably, the cross-sectional area of ​​the cavity inside the mounting box is larger than the cross-sectional area of ​​the main control unit. A track and rack are provided on the inner wall of the cavity, and a slider is provided on the outer side of the main control unit. The slider of the main control unit is inserted into the track of the mounting box. A second driving component is also provided inside the main control unit, and a gear is provided at the output end of the second driving component. The gear of the second driving component meshes with the rack, causing the second driving component to drive the main control unit to slide along the track and rack of the mounting box. The sliding direction of the main control unit is towards or away from the patient's gums.

[0009] Preferably, the output end of the first driving member is connected to the sleeve with internal locking teeth and drives the sleeve to rotate; the connecting end of the working unit is detachably inserted into the sleeve, and the outer side of the connecting end is provided with connecting teeth that can engage with the locking teeth of the sleeve.

[0010] Preferably, the working end is spoon-shaped and has a blade on its edge; a guide tube is provided in the transition area between the working end and the connecting end, and the output tube is inserted into the guide tube.

[0011] Preferably, a piston is provided at the end of the material box away from the output port, and a transmission rod is connected to one side of the piston; a first pushing unit is fixedly connected to the end of the handle away from the installation end; the first pushing unit includes a fixing member with a screw hole inside and a first pushing rod with a thread on the outside that is inserted into the screw hole of the fixing member; the fixing member is fixedly connected to the handle end; the first pushing rod abuts against the transmission rod; when the first pushing rod is rotated, the transmission rod pushes the piston to slide along the inside of the material box, pushing the recycled material in the material box into the conveying pump.

[0012] Preferably, a piston is provided at the end of the material box away from the output port, and a transmission rod is connected to one side of the piston; a second pushing unit is fixedly connected at the end of the handle away from the installation end; the second pushing unit includes a propulsion motor fixedly connected to the handle end and a second push rod connected to the output end of the propulsion motor; the second push rod abuts against the transmission rod; the second push rod pushes the transmission rod, causing the transmission rod to push the piston to slide along the inside of the material box, pushing the recycled material in the material box into the conveying pump.

[0013] The present invention also provides a periodontal regeneration surgical instrument kit based on a large periodontal disease model, including the above-mentioned positioning device and the above-mentioned surgical instrument. The mounting end is provided with a mounting guide rail on the side near the patient's gingiva. The mounting end is fixedly connected to a mounting block through the mounting guide rail. The mounting block is provided with positioning posts arranged linearly along the side of the mounting block facing the patient's gingiva. The side of the mounting block facing the patient's gingiva is set as a surface corresponding to the arc-shaped surface of the positioning part. At least one positioning post on the mounting block is pressed against the guide groove, and the operating part slides along the guide groove.

[0014] Beneficial effects 1. In this invention, the preoperative planning data of a large-scale periodontal disease model is accurately mapped to clinical surgery through the coordinated operation of a personalized positioning device and intelligent surgical instruments. The positioning device achieves stable physical anchoring by using a slot structure that perfectly matches the patient's dentition, and provides rigid path constraints for the surgical instruments through guide slots, effectively eliminating positioning deviations caused by the surgeon's hand tremors and visual errors. At the same time, the main control unit built into the surgical instruments can receive personalized surgical parameters from the large-scale model, and combined with the pressure sensor and ultrasonic thickness sensor integrated at the working end, a real-time closed-loop feedback system is constructed. During the debridement process, the instruments can automatically adjust the vibration frequency or execute emergency stop protection based on the monitored tissue resistance, ensuring thorough removal of lesions while physically eliminating the risk of instruments accidentally damaging healthy tooth roots or piercing the bone wall, significantly improving the safety and accuracy of periodontal regeneration surgery. 2. In this invention, the same working unit can complete the curettage and debridement and precise filling of regenerative material in the periodontal pocket, avoiding the secondary damage to soft tissue caused by frequent instrument changes in traditional surgery, greatly shortening the operation time and reducing the patient's postoperative reaction; the precision feeding mechanism and pushing unit designed inside the instrument can accurately control the amount of regenerative material injected according to the volume of bone defect, solving the problem that traditional manual filling is difficult to quantify and easily leads to material waste or insufficient filling. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0016] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0017] In the attached diagram: Figure 1 A three-dimensional structural schematic diagram of the periodontal regeneration surgical instrument according to an embodiment of the present invention is shown.

[0018] Figure 2 An exploded view of the overall periodontal regeneration surgical instrument according to an embodiment of the present invention is shown.

[0019] Figure 3 A three-dimensional structural schematic diagram of the positioning part of a periodontal regeneration surgical instrument according to an embodiment of the present invention is shown.

[0020] Figure 4 A cross-sectional view of the mounting end of a periodontal regeneration surgical instrument according to an embodiment of the present invention is shown.

[0021] Figure 5 A periodontal regeneration surgical instrument according to an embodiment of the present invention is shown. Figure 4 A magnified view of a portion of point A shown.

[0022] Figure 6 A side view of a periodontal regeneration surgical instrument according to an embodiment of the present invention is shown.

[0023] Figure 7 An assembly diagram of the mounting block of a periodontal regeneration surgical instrument according to an embodiment of the present invention is shown.

[0024] Figure 8 A periodontal regeneration surgical instrument according to an embodiment of the present invention is shown. Figure 7 A magnified view of a portion of point B shown.

[0025] Figure 9 An assembly diagram of the first pushing unit of a periodontal regeneration surgical instrument according to an embodiment of the present invention is shown.

[0026] Figure 10 An assembly diagram of the second pusher unit of a periodontal regeneration surgical instrument according to another embodiment of the present invention is shown.

[0027] List of main reference numerals 1. Positioning part; 101. Maxillary positioning component; 102. Mandibular positioning component; 103. Guide groove; 104. Mounting groove; 105. Sliding component; 2. Operating section; 201. Handle end; 202. Mounting end; 2021. Mounting guide rail; 203. Mounting block; 2031. Positioning post; 204. Sealing cover; 3. First driving unit; 301. Mounting box; 302. Main control; 303. First driving component; 304. Second driving component; 4. Working unit; 401. Connecting end; 402. Working end; 403. Guide tube; 5. Second drive unit; 501. Delivery pump; 502. Output pipe; 503. Handle; 6. Material storage section; 601. Material box; 602. Transmission rod; 7. First pushing unit; 701. Fixing component; 702. First push rod; 8. Second propulsion unit; 801. Propulsion motor; 802. Second propulsion rod. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] In this document, “illustrative” means “serving as an example, illustration or description”, and any illustration or implementation described herein as “illustrative” should not be construed as a more preferred or advantageous technical solution.

[0030] To keep the drawings concise, only the parts relevant to this application are shown schematically in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, only one of the components with the same structure or function is shown schematically, or only one of them is labeled.

[0031] In this document, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connected," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0032] Example: Please refer to Figures 1 to 10 : This invention proposes a periodontal regeneration surgical positioning device based on a large-scale periodontal disease model, comprising: Positioning Unit 1, based on the patient's preoperative oral CBCT imaging data and intraoral scan data, performs personalized customization after analysis and processing using a large periodontal disease model, such as... Figure 1 , Figure 2 and Figure 3 As shown, the positioning part 1 includes an upper jaw positioning member 101 or a lower jaw positioning member 102. In this embodiment, the positioning member is made of a biocompatible photocurable resin material using 3D printing technology.

[0033] like Figure 1 , Figure 2 and Figure 3As shown, in one embodiment, the positioning part 1 has a slot inside that perfectly matches the patient's dentition shape. During surgery, the doctor puts the positioning part 1 into the patient's mouth, and the slot forms a unique mechanical interlock with the patient's natural dentition, ensuring the stability of the device during the operation and preventing displacement caused by saliva lubrication or instrument contact. On the arc-shaped surface of the maxillary positioning part 101 or the mandibular positioning part 102 pointing outward, there are several guide grooves 103 arranged linearly along the dentition direction. The position and angle of these guide grooves 103 are calculated by the periodontal disease model based on the three-dimensional coordinates of the lesions - such as the periodontal pocket floor and bone defect area. The axis of the guide grooves 103 points vertically from the teeth to the gums, providing a rigid physical navigation channel for the surgical instruments, forcibly limiting the entry path of the instruments, and eliminating errors caused by the doctor's hand tremors.

[0034] In a preferred embodiment, to increase the flexibility of the device, a mounting groove 104 is provided on the arc-shaped surface of the maxillary positioning member 101 or the mandibular positioning member 102. A sliding member 105 is provided in the mounting groove 104 and can slide along it. The aforementioned guide groove 103 is provided on the sliding member 105. A damping structure or locking knob is provided between the sliding member 105 and the mounting groove 104. When it is necessary to adjust the surgical approach, the doctor can release the locking structure and finely adjust the position of the sliding member 105, thereby changing the relative position of the guide groove 103 to adapt to the treatment needs of different tooth positions.

[0035] This invention also proposes a periodontal regeneration surgical instrument based on a large model of periodontal disease, comprising: The operating unit 2 consists of a front mounting end 202 and a rear handle end 201. The mounting end 202 integrates a first drive unit 3 and a second drive unit 5. The first drive unit 3 is mainly used to drive the working unit 4 to perform debridement operations. It includes a mounting box 301, a main control 302, and a first drive component 303. The inner wall of the mounting box 301 is provided with a track and a rack. The outer side of the main control 302 is provided with a slider that cooperates with it. The main control 302 also integrates a second drive component 304. The gear at its output end meshes with the rack. When the second drive component 304 works, it drives the main control 302 to slide along the track, thereby driving the working unit 4 connected to it to perform micron-level feeding movements. This allows the instrument to automatically limit the maximum cutting depth according to the depth planned by the large model, physically eliminating the risk of damaging healthy bone tissue.

[0036] It should be noted that the first driving component 303 can be a piezoelectric ceramic motor, used to drive the working end 402 to swing slightly for angle adjustment; the main control unit 302 has a built-in microprocessor and wireless communication module, such as Bluetooth or Wi-Fi; it connects to an external periodontal disease large model system through the wireless communication module to receive personalized surgical parameters customized for the current patient, such as optimal vibration frequency, maximum cutting depth, pressure threshold, etc.; the main control unit 302 adjusts the start, stop, and rotation angle of the first driving component 303 in real time according to these parameters to achieve adaptive debridement.

[0037] like Figure 2 , Figure 4 , Figure 4 and Figure 5 As shown, the instrument also includes an L-shaped working unit 4, which includes a connecting end 401 and a working end 402. The connecting end 401 is connected to the output end of the first driving member 303 through a quick-change structure. Specifically, the output end of the first driving member 303 is connected to a sleeve with internal locking teeth. The connecting end 401 is inserted into the sleeve and engages with the locking teeth of the sleeve through the connecting teeth on the outside, allowing the doctor to quickly change the working head of different shapes according to the surgical site.

[0038] The working end 402 is spoon-shaped with sharp cutting edges, specifically designed to scrape away tartar and granulation tissue from the root surface. To enable intelligent operation, a pressure sensor and an ultrasonic thickness sensor are embedded in the root or surface of the working end 402.

[0039] It should be noted that, firstly, the pressure sensor is used to monitor the contact pressure between the working end and the bone tissue in real time. The main control 302 is configured to immediately control the first drive 303 to stop working or reduce power when the pressure exceeds the preset safety threshold of the large model - for example, when it touches the tooth root or metal implant - to achieve "force feedback emergency stop". Secondly, the ultrasonic thickness sensor is used to measure the depth of the periodontal pocket or the bone surface morphology after debridement in real time, and transmit the data back to the large model system in real time to verify the surgical effect.

[0040] In addition, such as Figure 6 , Figure 7 and Figure 8 As shown, a guide tube 403 is provided in the transition area between the working end 402 and the connecting end 401. An output tube 502 is inserted into the guide tube 403. The outlet of the output tube 502 is located on the back or side of the working end 402 and a one-way anti-backflow valve can be provided. Through the above structure, the instrument can accurately deliver bone powder and other regenerative materials to the defect area through the same channel at the same time as or after debridement.

[0041] like Figure 2 , Figure 9 and Figure 10As shown, the handle end 201 has a cavity inside for accommodating the storage section 6 and the second drive unit 5. The storage section 6 includes a disposable material box 601 for loading regenerated materials such as bone meal, collagen or growth factors. The output port of the material box 601 is connected to the input end of the delivery pump 501, i.e. the second drive unit. The output end of the delivery pump 501 is connected to the working end 402 through the output pipe 502. It should be noted that the handle end 201 also has a detachable sealing cover 204, which is used to seal the cavity of the handle end 201. When the sealing cover 204 is opened, the storage part 6 can be assembled, and after the assembly is completed, the handle end 201 is sealed by the sealing cover 204.

[0042] To eject the material from the material box 601, this application provides two push-out embodiments: Firstly, such as Figure 9 As shown, the handle end 201 is connected to the first pushing unit 7, which includes a fixing member 701 and a first pushing rod 702; the material box 601 is provided with a piston and a transmission rod 602 at its tail. The first pushing rod 702 is screwed into the fixing member 701 by a thread, and its end abuts against the transmission rod 602. The doctor rotates the first pushing rod 702 and uses the self-locking and high precision of the threaded transmission to achieve micro-level material extrusion, which is suitable for repairing tiny defects that are extremely sensitive to dosage. Secondly, such as Figure 10 As shown, the handle end 201 is connected to the second push unit 8, which includes a push motor 801 and a second push rod 802. The push motor 801 is communicatively connected to the main control 302. The main control 302 automatically generates a push curve based on the bone defect volume pre-calculated according to the periodontal disease large model, controls the speed and stroke of the push motor 801, and thus realizes automatic feeding.

[0043] Based on the combination of the aforementioned positioning device and surgical instruments, this invention also proposes a periodontal regeneration surgical instrument kit based on a large-scale periodontal disease model, such as... Figure 1 and Figure 2 In order to achieve precise coordination between the instrument and the positioning device, the mounting end 202 of the operating part 2 is provided with a mounting guide rail 2021 on the side near the gum line, and a mounting block 203 is fixedly connected on the guide rail; the mounting block 203 is provided with linearly arranged positioning posts 2031 on the side pointing towards the gum line.

[0044] During the surgery, the doctor moves the operating unit 2 close to the positioning unit 1, so that the positioning post 2031 on the mounting block 203 is inserted into the guide groove 103 on the positioning unit 1. At this time, the operating unit 2 is rigidly constrained on the pre-planned path. The doctor starts the instrument, and the first drive unit 3 drives the working end 402 to vibrate and clean the wound. At the same time, the pressure sensor monitors the resistance in real time. After the cleaning is completed, the second drive unit 5 is started to inject the regenerative material into the defect area through the working end 402.

[0045] In summary, this application achieves minimally invasive, precise, and intelligent periodontal regeneration surgery through a dual navigation system of "intelligent instruments + physical guides" combined with preoperative planning and real-time intraoperative feedback using a large model.

[0046] The above description is merely a specific embodiment of this application. Under the teachings of this application, those skilled in the art can make other improvements or modifications based on the above embodiments. Those skilled in the art should understand that the above specific description is only to better explain the purpose of this application, and the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A surgical positioning device for periodontal regeneration based on a large model of periodontal disease, characterized in that, include: The positioning part (1) is composed of a maxillary positioning component (101) or a mandibular positioning component (102). The maxillary positioning component (101) or the mandibular positioning component (102) has a slot inside, and the two are fixed to the outer side of the upper or lower teeth respectively through the slot. The maxillary positioning component (101) or the mandibular positioning component (102) has a number of guide grooves (103) arranged linearly along the arc surface pointing outward. The axis of the guide grooves (103) is vertical from the tooth to the gum.

2. The periodontal regeneration surgical positioning device based on a large periodontal disease model according to claim 1, characterized in that, The maxillary positioning component (101) or the mandibular positioning component (102) has an installation groove (104) on its outward-facing arc-shaped surface; a sliding component (105) is provided on the installation groove (104) and slides along the installation groove (104); the guide groove (103) is provided on the sliding component (105).

3. The periodontal regeneration surgical positioning device based on a large periodontal disease model according to claim 1, characterized in that, The slots of the maxillary positioning component (101) or the mandibular positioning component (102) are customized according to the scanning imaging results of the patient's tooth arrangement, so that the slots of the maxillary positioning component (101) or the mandibular positioning component (102) completely match the patient's tooth arrangement; the maxillary positioning component (101) or the mandibular positioning component (102) can be made in 3D.

4. A periodontal regeneration surgical instrument based on a large-scale periodontal disease model, characterized in that, include: The operating unit (2) consists of a mounting end (202) and a handle end (201) with an internal cavity; the mounting end (202) is equipped with a first drive unit (3) and a second drive unit (5); the first drive unit (3) consists of a mounting box (301), a main control (302) and a first drive component (303), the main control (302) is placed inside the mounting box (301), and the main control (302) is electrically connected to the first drive component (303) to control the start, stop and speed of the first drive component (303); The L-shaped working unit (4) is provided with a connecting end (401) and a working end (402). The connecting end (401) is connected to the output end of the first driving member (303), so that the working end (402) swings under the drive of the first driving member (303). The second drive unit (5) is composed of a delivery pump (501), and the second drive unit (5) is detachably connected to the mounting end (202); the input end of the delivery pump (501) points to the cavity inside the handle end (201), and the output end of the delivery pump (501) is connected to the output pipe (502), and the end of the output pipe (502) away from the delivery pump (501) points to the working end (402). A storage section (6) is placed in the cavity inside the handle end (201), and the storage section (6) is composed of a material box (601); the output port of the material box (601) is connected to the input end of the delivery pump (501).

5. A periodontal regeneration surgical instrument based on a large model of periodontal disease according to claim 4, characterized in that, The cross-sectional area of ​​the cavity inside the mounting box (301) is larger than the cross-sectional area of ​​the main control (302). A track and a rack are provided on the inner wall of the cavity of the mounting box (301), and a slider is provided on the outer side of the main control (302). The slider of the main control (302) is inserted into the track of the mounting box (301). A second driving member (304) is also provided inside the main control (302), and a gear is provided at the output end of the second driving member (304). The gear of the second driving member (304) meshes with the rack, so that the second driving member (304) drives the main control (302) to slide along the track and rack of the mounting box (301). The sliding direction of the main control (302) is closer to or farther from the patient's gums.

6. The periodontal regeneration surgical instrument based on a large model of periodontal disease according to claim 4, characterized in that, The output end of the first driving member (303) is connected to the sleeve with internal locking teeth and drives the sleeve to rotate; the connecting end (401) of the working unit (4) is detachably inserted into the sleeve, and the outer side of the connecting end (401) is provided with connecting teeth that can engage with the locking teeth of the sleeve.

7. A periodontal regeneration surgical instrument based on a large model of periodontal disease according to claim 4, characterized in that, The working end (402) is spoon-shaped and has a blade on its edge; a guide tube (403) is provided in the transition area between the working end (402) and the connecting end (401), and the output tube (502) is inserted into the guide tube (403).

8. A periodontal regeneration surgical instrument based on a large model of periodontal disease according to claim 4, characterized in that, A piston is provided at the end of the material box (601) away from the output port, and a transmission rod (602) is connected to one side of the piston; a first pushing unit (7) is fixedly connected at the end of the handle end (201) away from the mounting end (202); the first pushing unit (7) includes a fixing member (701) with a screw hole inside and a first push rod (702) with a thread on the outside and inserted into the screw hole of the fixing member (701); the fixing member (701) is fixedly connected to the handle end (201); the first push rod (702) abuts against the transmission rod (602); when the first push rod (702) is rotated, the transmission rod (602) pushes the piston to slide along the inside of the material box (601) and pushes the recycled material in the material box (601) into the conveying pump (501).

9. A periodontal regeneration surgical instrument based on a large model of periodontal disease according to claim 4, characterized in that, A piston is provided at the end of the material box (601) away from the output port, and a transmission rod (602) is connected to one side of the piston; a second pushing unit (8) is fixedly connected at the end of the handle end (201) away from the mounting end (202); the second pushing unit (8) includes a propulsion motor (801) fixedly connected to the handle end (201) and a second push rod (802) connected to the output end of the propulsion motor (801); the second push rod (802) abuts against the transmission rod (602); the second push rod (802) pushes the transmission rod (602), causing the transmission rod (602) to push the piston to slide along the inside of the material box (601), pushing the recycled material in the material box (601) into the conveying pump (501).

10. A periodontal regeneration surgical instrument kit based on a large model of periodontal disease, comprising the positioning device according to any one of claims 1-3 and the surgical instrument according to any one of claims 4-9, characterized in that, The surgical instrument has an installation guide rail (2021) on the side of the operating part (2) near the patient's gums. The installation end (202) is fixedly connected to the installation block (203) through the installation guide rail (2021). The side of the installation block (203) pointing towards the patient's gums is provided with positioning posts (2031) arranged linearly along the installation block (203). The side of the installation block (203) pointing towards the patient's gums is set as the surface corresponding to the arc surface of the positioning part (1). At least one positioning post (2031) on the installation block (203) is pressed against the guide groove (103) and the operating part (2) slides along the guide groove (103).

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