Laser-based three-dimensional positioning and guidance device for root canal treatment access

Abstract

The present invention provides a three-dimensional positioning and guiding device for a root canal treatment pulp opening passage based on laser, comprising a tooth surface positioning component and a pulp opening guiding component, wherein the tooth surface positioning component is arranged on the dentition, the pulp opening guiding component is arranged on the tooth surface positioning component, the tooth surface positioning component comprises a positioning housing, an inner clamping ring and an outer clamping ring, the positioning housing is provided with a positioning guide hole, the outer clamping ring is arranged at the positioning guide hole of the positioning housing, the inner clamping ring is movably connected with the outer clamping ring, and the pulp opening guiding component comprises an X-axis support frame, a Y-axis support frame, an X-axis laser emitter and a Y-axis laser emitter; the device indicates the pulp opening passage through laser, the effect is intuitive and visible, the operation is controllable, and the operation is simple and easy to master. The device can guide more accurate pulp opening, less tooth hard tissue is removed, and the resistance and functionality of the affected tooth are preserved to the greatest extent, thereby extending the service life of the tooth in the oral cavity.

Description

Technical Field

[0001] The invention relates to a three-dimensional positioning and guiding device for a root canal treatment pulp opening passage based on laser. Background Art

[0002] Apical periodontitis is a common and frequent oral disease. Currently, the most commonly used and effective means in clinical practice is complete root canal treatment, which mainly controls infection, prevents the occurrence of apical periodontitis or promotes the healing of apical periodontitis through thorough root canal preparation, effective root canal disinfection and strict root canal filling.

[0003] The first step of root canal treatment is to establish a straight path into the root canal so that instruments can enter the root canal and remove the infection. Clinically, this process is mainly completed by doctors based on image-assisted examinations. This pulp-opening method relies more on the doctor's experience, but when encountering variations in the anatomical structure of the pulp cavity or root canal or insufficient doctor experience, it may lead to excessive removal of tooth hard tissue, reduce the mechanical strength of the affected tooth, and significantly increase the risk of tooth fracture.

[0004] Modern endodontic treatment advocates the concept of minimally invasive treatment, which believes that minimally invasive pulpotomy does not require the complete removal of the pulp chamber roof, so as to retain more of the crown and the hard tissue of the neck, and to retain the mechanical strength of the tooth to the maximum extent. If this precise minimally invasive pulpotomy relies solely on the experience of the surgeon, it is easy to cause the omission and lateral penetration of the root canal. Therefore, it is necessary to use the assistance of precise positioning technology and equipment to improve the accuracy of pulpotomy. With the rapid development of oral and maxillofacial cone beam CT (CBCT) and 3D printing technology, pulpotomy access guide system came into being.

[0005] However, the existing guide system mainly exists in the form of a sleeve, which requires a matching specially made extended needle, which greatly increases the possibility of instrument breakage, and the sleeve structure will also cause problems such as excessive heat generation and difficulty in timely cleaning of debris. For example, Chinese patent CN 208677610 U "Treatment guide for root canal treatment" only relies on the side overflow channel to dissipate heat and clean debris. The needle contacts the guide tube, and the guide tube deviates from the preset direction due to the friction and wear of the needle, which can easily lead to operational deviations, affect the accuracy of pulp opening, and make it difficult to ensure the ideal operation effect. In addition, the guide is 4mm high and occupies more treatment space. For patients with small mouth opening or small distance between upper and lower teeth, there is a risk of difficulty in inserting the needle.

[0006] The above problems are issues that should be considered and resolved during the design and production process of the laser-based root canal treatment pulp access three-dimensional positioning guide device. Summary of the invention

[0007] The purpose of the present invention is to provide a laser-based three-dimensional positioning and guiding device for the pulp opening passage of root canal treatment, so as to achieve accurate positioning of the root canal to solve the problems in the prior art that easily lead to operational deviations, affect the accuracy of pulp opening, and are difficult to ensure ideal operating effects.

[0008] The technical solution of the present invention is:

[0009] A three-dimensional positioning and guiding device for a root canal treatment pulp access passage based on laser, comprising a tooth surface positioning component and a pulp access guiding component, wherein the tooth surface positioning component is arranged on the dentition, and the pulp access guiding component is arranged on the tooth surface positioning component, the tooth surface positioning component comprises a positioning shell, an inner clamping ring and an outer clamping ring, the positioning shell is provided with a positioning guide hole, the outer clamping ring is arranged at the positioning guide hole of the positioning shell, the inner clamping ring is movably connected with the outer clamping ring, the pulp access guiding component comprises an X-axis support frame, a Y-axis support frame, an X-axis laser emitter and a Y-axis laser emitter, the end of the X-axis support frame and the end of the Y-axis support frame are respectively connected to the outer clamping ring, the other end of the X-axis support frame is provided with an X-axis laser emitter, and the other end of the Y-axis support frame is provided with a Y-axis laser emitter.

[0010] Furthermore, the inner retaining ring component includes a lower guide plane, an inner retaining ring plate and a plurality of retaining blocks. The inner retaining ring plate is provided with an inner guide hole. The bottom of the inner retaining ring plate is provided with a lower guide plane. The lower guide plane is annular. A plurality of retaining blocks are evenly arranged around the top of the lower guide plane, and gaps are provided between adjacent retaining blocks.

[0011] Furthermore, the outer clamping ring component includes an outer clamping ring plate, a clamping block and a stop protrusion. The outer clamping ring plate is provided with an outer guide hole. A plurality of clamping blocks are evenly arranged around the outer guide hole. The inner clamping ring plate is embedded in the outer guide hole. The inner clamping ring plate and the outer clamping ring plate are concentrically arranged. The height of the outer clamping ring plate is not greater than the distance between the retaining block and the lower guide plane. A stop protrusion is provided at the end of the clamping block. A clamping groove for the retaining block to pass through is provided between adjacent clamping blocks.

[0012] Furthermore, the X-axis support frame and the Y-axis support frame have the same structure.

[0013] Furthermore, the X-axis support frame includes an X-axis support arm and a clamping ring. The X-axis support arm is an L-shaped X-axis support arm. One end of the X-axis support arm is connected to an outer clamping ring. The other end of the X-axis support arm is provided with a clamping ring for connecting the X-axis laser emitter.

[0014] Furthermore, the X-direction laser emitter and the Y-direction laser emitter are respectively arranged in a waterproof housing, and the waterproof housing is respectively provided with a directional convexity, and the directional convexity is respectively arranged in the laser plane emitted by the X-direction laser emitter or the Y-direction laser emitter, and the clamping ring adopts a C-shaped clamping ring, and the clamping ring is provided with an opening for accommodating the directional convexity.

[0015] Furthermore, the X-direction support frame and the Y-direction support frame form an angle of 60°-90°.

[0016] Furthermore, the height of the inner clamping ring is 2 mm-2.5 mm, and the diameter of the inner guide hole is 6 mm-9 mm.

[0017] Furthermore, the use process of the laser-based root canal treatment pulp access three-dimensional positioning and guiding device is as follows: the tooth surface positioning component is placed on the dentition that needs pulp access, wherein the inner clamping ring is placed on the occlusal surface of the tooth that needs pulp access, i.e., the target tooth, and the positioning shell is tightly fitted and fixed to the target tooth and the surrounding tissue surface; after the outer clamping ring and the inner clamping ring are connected, the X-direction laser plane and the Y-direction laser plane are respectively emitted by the X-direction laser emitter and the Y-direction laser emitter, and the intersecting straight lines of the X-direction laser plane and the Y-direction laser plane are overlapped with the pulp access, thereby realizing the positioning and guiding of the pulp access.

[0018] Furthermore, positioning guidance of the medullary opening passage is achieved. Specifically, when using a drilling and grinding needle for medullary opening, if the drilling and grinding needle and the intersecting straight line appear to overlap, it indicates that the drilling direction of the needle is consistent with the designed medullary opening direction. If it appears as an intersecting line or an intersection point, it indicates that the drilling direction deviates from the designed medullary opening direction.

[0019] The beneficial effects of the present invention are:

[0020] 1. This laser-based root canal treatment pulp access three-dimensional positioning guidance device uses laser to indicate the pulp access path, and the effect is intuitive and visual, making the operation controllable, simple and easy to master. The device can guide more accurate pulp access, remove less tooth hard tissue, and preserve the resistance and functionality of the affected tooth to the greatest extent, thereby extending the service life of the tooth in the mouth.

[0021] Second, this laser-based root canal treatment pulp access three-dimensional positioning and guiding device has no mechanical contact between the drilling and grinding needle and the guiding structure, and continuous operation can maintain the guiding accuracy of the pulp access. After installing the device, the surface of the treated tooth is open, and the cooling water contact and drainage are sufficient, without excessive heat generation and accumulation of grinding debris. The space height requirement above the treated tooth is small, occupying only about 2mm-2.5mm above the occlusal surface, which can adapt to patients in the molar area or with a small mouth opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of a three-dimensional positioning and guiding device for a root canal treatment pulp access passage based on laser according to an embodiment of the present invention;

[0023] Figure 2 is a schematic structural diagram of a positioning housing and an inner clamping ring in an embodiment;

[0024] Figure 3 is a schematic structural diagram of an inner clamping ring in an embodiment;

[0025] Figure 42 is a schematic structural diagram of an outer clamping ring in an embodiment;

[0026] Figure 5 2 is a schematic structural diagram of an outer clamping ring and a medullary opening guide assembly in an embodiment;

[0027] Wherein: 1-positioning housing, 2-inner clamping ring, 3-outer clamping ring, 4-X-direction support frame, 5-Y-direction support frame, 6-X-direction laser transmitter, 7-Y-direction laser transmitter, 8-waterproof housing, 9-clamping ring, 10-directional convex;

[0028] 21-lower guide plane, 22-inner snap ring plate, 23-retaining block, 24-inner guide hole;

[0029] 31-external clamping ring plate, 32-block, 33-stop convex, 34-slot, 35-external guide hole. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Example

[0031] A three-dimensional positioning and guiding device for a root canal treatment pulp access based on laser, such as Figure 1 , including a tooth surface positioning component and a pulp opening guide component, the tooth surface positioning component is arranged on the dentition, the pulp opening guide component is arranged on the tooth surface positioning component, the tooth surface positioning component includes a positioning shell 1, an inner clamping ring 2 and an outer clamping ring 3, the positioning shell 1 is provided with a positioning guide hole, the outer clamping ring 3 is arranged at the positioning guide hole of the positioning shell 1, and the inner clamping ring 2 is movably connected with the outer clamping ring 3, such as Figure 5 The medullary opening guide assembly includes an X-axis support frame 4, a Y-axis support frame 5, an X-axis laser emitter 6 and a Y-axis laser emitter 7. The ends of the X-axis support frame 4 and the ends of the Y-axis support frame 5 are respectively connected to the outer clamping ring 3. The other end of the X-axis support frame 4 is provided with the X-axis laser emitter 6, and the other end of the Y-axis support frame 5 is provided with the Y-axis laser emitter 7.

[0032] This laser-based root canal treatment pulp access three-dimensional positioning guidance device uses laser to indicate the pulp access path, and the effect is intuitive and visual, making the operation controllable, simple and easy to master. The device can guide more accurate pulp access, remove less tooth hard tissue, and preserve the resistance and functionality of the affected tooth to the greatest extent, thereby extending the service life of the tooth in the mouth.

[0033] The use process of this laser-based root canal treatment pulp opening passage three-dimensional positioning and guiding device is to place the tooth surface positioning component on the dentition that needs pulp opening, wherein the inner clamping ring 2 is placed on the occlusal surface of the tooth that needs pulp opening, that is, the target tooth, and the positioning shell 1 is tightly fitted and fixed to the target tooth and the surrounding tissue surface. After the outer clamping ring 3 and the inner clamping ring 2 are connected, the X-axis laser emitter 6 and the Y-axis laser emitter 7 are used to respectively emit the X-axis laser plane and the Y-axis laser plane, and the intersection straight lines of the X-axis laser plane and the Y-axis laser plane are respectively overlapped with the pulp opening passage, thereby realizing the positioning and guiding of the pulp opening passage. Specifically, when using a drilling and grinding needle for pulp opening, if the drilling and grinding needle and the intersection straight line appear to overlap, it indicates that the drilling and grinding direction of the needle is consistent with the designed pulp opening direction. If it appears as an intersection line or intersection point, it indicates that the drilling and grinding direction deviates from the designed pulp opening direction.

[0034] After the positions of the X-axis support frame 4 and the Y-axis support frame 5 are determined, the X-axis laser emitter 6 and the Y-axis laser emitter 7 indicate a unique direction in space. At the same time, after the inner clamping ring 2 and the outer clamping ring 3 are connected and fixed, the axis thereof is consistent with the medullary access path, that is, when the indicated direction of the laser emitter is consistent with the direction of the axis of the inner clamping ring 2 and the outer clamping ring 3, the indicated direction of the laser emitter is the preset medullary access path direction.

[0035] like Figure 2 and Figure 3 The inner snap ring 2 includes a lower guide plane 21, an inner snap ring plate 22 and a plurality of retaining blocks 23. The inner snap ring plate 22 is provided with an inner guide hole 24. The bottom of the inner snap ring plate 22 is provided with a lower guide plane 21. The lower guide plane 21 is annular. A plurality of retaining blocks 23 are evenly arranged around the top of the lower guide plane 21, and gaps are provided between adjacent retaining blocks 23.

[0036] The inner clamping ring 2 is provided with a lower guide plane 21 for connecting with the positioning housing 1. The inner guide hole 24 is provided to facilitate the drilling and grinding needle to pass through for pulp opening. The lower guide plane 21 is preferably perpendicular to the central axis of the inner clamping ring 2 and the outer clamping ring 3.

[0037] like Figure 4 The outer clamping ring 3 includes an outer clamping ring plate 31, a clamping block 32 and a stop protrusion 33. The outer clamping ring plate 31 is provided with an outer guide hole 35. A plurality of clamping blocks 32 are evenly arranged around the outer guide hole 35. The inner clamping ring plate 22 is embedded in the outer guide hole 35. The inner clamping ring plate 22 is concentrically arranged with the outer clamping ring plate 31. The height of the outer clamping ring plate 31 is not greater than the distance between the retaining block 23 and the lower guide plane 21. A stop protrusion 33 is provided at the end of the clamping block 32. A clamping groove 34 for the retaining block 23 to pass through is provided between adjacent clamping blocks 32.

[0038] In the outer clamping ring part 3, the inner clamping ring plate 22 is concentrically arranged with the outer clamping ring plate 31, so that the central axis of the outer clamping ring part 3 coincides with the central axis of the inner clamping ring part 2. The central axis serves as the guiding straight line for the medullary opening passage, and the central axis coincides with the intersection straight line of the laser emission surfaces of the X-direction laser emitter 6 and the Y-direction laser emitter 7, which is convenient for intuitive display and guidance.

[0039] When the outer clamping ring 3 is connected to the inner clamping ring 2, the inner clamping ring plate 22 is embedded in the outer guide hole 35, the retaining block 23 passes through the clamping groove 34 and can rotate on the clamping block 32, the retaining block 23 is limited by the stop protrusion 33, and the outer clamping ring plate 31 is embedded between the retaining block 23 and the lower guide plane 21. The outer clamping ring 3 can rotate around the inner clamping ring 2 to adjust the position of the pulp opening guide assembly, avoiding the problem that the pulp opening guide assembly is blocked during use and affects the normal guidance.

[0040] like Figure 5 The X-axis support frame 4 and the Y-axis support frame 5 have the same structure. The X-axis support frame 4 includes an X-axis support arm and a clamp ring 9. The X-axis support arm adopts an L-shaped X-axis support arm. One end of the X-axis support arm is connected to the outer clamp ring 3, and the other end of the X-axis support arm is provided with a clamp ring 9 for connecting the X-axis laser emitter 6. By setting the X-axis support frame 4 and the Y-axis support frame 5, the support positioning of the X-axis laser emitter 6 and the Y-axis laser emitter 7 are respectively realized, and the structure is simple, reliable, and easy to use.

[0041] like Figure 5 The X-direction laser emitter 6 and the Y-direction laser emitter 7 are respectively arranged in a waterproof housing 8, and the waterproof housing 8 is respectively provided with a directional protrusion 10, and the directional protrusion 10 is respectively arranged in the laser plane emitted by the X-direction laser emitter 6 or the Y-direction laser emitter 7. The clamp ring 9 adopts a C-shaped clamp ring 9, and the clamp ring 9 is provided with an opening for accommodating the directional protrusion 10. By providing the directional protrusion 10, it is convenient to realize the positioning of the X-direction laser emitter 6 or the Y-direction laser emitter 7, and it is convenient to determine the direction of the emitted laser plane through the direction of the directional protrusion 10, so as to facilitate positioning. The directional protrusion 10 is accommodated by the opening of the clamp ring 9, so as to realize the accurate and effective positioning of the directional protrusion 10, and avoid the problem of displacement of the X-direction laser emitter 6 and the Y-direction laser emitter 7 during use. The device can be fully waterproof, ensuring that it adapts to the clinical operation environment and is not interfered by the treatment cooling water.

[0042] like Figure 5 The X-axis support frame 4 and the Y-axis support frame 5 preferably form an angle of 60°-90°, which can be determined according to the size of the patient's opening. The horizontal part of the X-axis support frame 4 and the Y-axis support frame 5 is about 70 mm long, and the height of the vertical part can be selected in different sizes to adapt to the patient's opening.

[0043] The inner clamping ring 2 and the positioning shell 1 can be quickly formed in one step by 3D printing technology, and materials such as light-curing resin can be used but not limited to. The positioning shell 1 can be generated by a computer, and fits tightly with the tissue surface of the target tooth and its adjacent teeth. The retention holes and other structures can be added to ensure a tight fit with the patient's mouth. In the device, the X-axis laser emitter 6 and the Y-axis laser emitter 7 are preferably straight-line laser emitters, and are cylindrical. The laser emitter includes a cylindrical laser emission assembly, a power cord and a power supply, and the cylindrical laser emission assembly is connected to the power supply through the power cord.

[0044] In this laser-based root canal treatment pulp access three-dimensional positioning and guiding device, the positioning shell 1 can design the matching of the instrument and the target root canal of the target tooth by constructing a virtual three-dimensional model of the target tooth, thereby planning the optimal path, and then quickly forming it in one step by 3D printing, and a personalized positioning shell 1 can be generated for each tooth, thereby achieving accurate positioning of the target root canal of the target tooth, reducing the possibility of iatrogenic injuries such as bottom penetration and side penetration, preserving the target tooth to a greater extent, and improving the doctor's work efficiency. The positioning shell 1 is preferably made of transparent material for easy positioning and observation.

[0045] In one embodiment, the cylindrical annular inner wall of the outer clamping ring 3 is provided with three equally spaced slots 34, each occupying a 60° arc area, and a stop convex 33 is provided at the clockwise end. The inner clamping ring 2 is cylindrical and annular, and its axis is consistent with the preset pulp opening passage for root canal treatment. Three fan-shaped equally spaced retaining blocks 23 extend outward from its outer wall, each occupying a 57° arc area, which can be precisely aligned with the slot 34 structure of the outer clamping ring 3. At this time, the central axes of the inner clamping ring 2 and the outer clamping ring 3 are consistent. The straight lines obtained by the intersection of the laser emission surfaces of the X-axis laser emitter 6 and the Y-axis laser emitter 7 in space are both coincident with the central axes of the inner clamping ring 2 and the outer clamping ring 3, that is, they are consistent with the preset pulp opening passage.

[0046] In the above embodiment, the outer clamping ring 3 is a cylindrical ring with an inner diameter of 12mm, an outer diameter of 15mm, and a height of 2mm. The inner wall has three equally spaced slots 34. The clamping block 32 is 1mm wide and 1.25mm thick, each occupying a 60° arc area. The clockwise end of the clamping block 32 has a stop convex 33. The height of the clamping ring 9 is 5mm. The inner diameter of the clamping ring 9 matches the diameter of the laser emitter. The opening of the clamping ring 9 is precisely aligned with the directional convex 10 to prevent the laser emitter from rotating and deviating. When the laser emitter is correctly inserted into the clamping ring 9 and the power is turned on, the straight line obtained by the intersection of the planes through which the two straight-line lasers are emitted in space coincides with the central axis of the outer clamping ring 3.

[0047] In the above embodiment, the inner clamping ring 2 is a cylindrical ring with an outer diameter of 10 mm, an inner diameter of 9 mm, and a height of 2 mm. The central axis of the inner clamping ring 2 coincides with the guiding passage for the pre-designed pulpotomy or other treatment requirements for root canal treatment. Three fan-shaped retaining blocks 23 extend outward from the outer wall of the inner clamping ring 2. The retaining blocks 23 are evenly spaced, each occupying 57° and 0.75 mm thick, and can be accurately aligned with the groove 34 on the inner wall of the outer clamping ring 3. The lower side of the outer wall of the inner clamping ring plate 22 extends from the connection with the positioning housing 1 to form a lower guide plane 21, which is perpendicular to the central axis of the inner clamping ring 2 and is 1.25 mm away from the retaining blocks 23.

[0048] In this laser-based root canal treatment pulpotomy path three-dimensional positioning and guidance device, after obtaining the patient's oral sectional anatomical image data through medical 3D image scanning (including but not limited to cone beam CT and spiral CT), the pulpotomy path or other linear paths that need to be guided can be preset. The patient's intraoral surface is scanned or the patient's intraoral model is surface scanned to obtain accurate intraoral surface three-dimensional structure data, and the CT image and surface structure data are matched. Select the positioning shell 1 generation area to generate the positioning shell 1.

[0049] According to the position and direction of the guiding straight path, the virtual model of the inner clamping ring 2 is placed in the computer software, and the position of the virtual model is adjusted to avoid the virtual model of the inner clamping ring 2 overlapping with the patient's oral model. According to the position and direction of the guiding straight path, the virtual model of the outer clamping ring 3 is placed in the computer software, and the angle is adjusted along the central axis of the outer clamping ring 3 to avoid the X-axis bracket arm and the Y-axis bracket arm being blocked by the patient's oral tissue. Finally, Boolean subtraction is performed to clear the overlapping part of the bracket installation path with the positioning shell 1, and the final stl guide plate file for printing is generated.

[0050] The positioning shell 1 is generated by 3D printing, and the groove 34 of the outer retaining ring 3 corresponds to the fan-shaped retaining block 23 of the inner retaining ring 2. The inner retaining ring 2 is inserted along the central axis direction and rotated clockwise about 60°. When the retaining block 23 contacts the stop protrusion 33, it indicates that the outer retaining ring 3 and the inner retaining ring 2 are assembled to the preset position. At this time, the X-axis laser emitter 6 and the Y-axis laser emitter 7 are turned on, and the intersection of the two laser planes coincides with the central axis of the inner retaining ring 2.

[0051] The positioning shell 1 is accurately put into the preset position in the patient's mouth. At this time, the intersection of the laser plane coincides with the pre-set guiding linear path before the operation. The oral treatment motor or high-speed turbine and other equipment are placed in the treatment area. When the drilling and grinding needle is located in the pre-designed path, the doctor can see two laser lines overlapping and projected on the surface of the drilling and grinding needle, which assists the doctor to determine the position of the pre-designed path and guide the treatment. When the motor or turbine is started, the guiding laser plane can be seen in the cooling water spray range to form a holographic projection within the water mist range, which also assists the clinical physician to confirm or correct the treatment direction.

[0052] This laser-based three-dimensional positioning and guiding device for the pulp-opening pathway in root canal treatment abandons the sleeve structure of the existing guide plate system, can open the tooth surface, and is particularly suitable for precise root canal positioning of teeth with small mouth opening and small distance between upper and lower teeth.

[0053] This laser-based root canal treatment pulp access three-dimensional positioning and guiding device has no mechanical contact between the drilling and grinding needle and the pulp access guiding component, and continuous operation can maintain the guiding accuracy of the pulp access. After installing the device, the surface of the treated tooth is open, and the cooling water contact and drainage are sufficient, without excessive heat generation and accumulation of grinding debris. The space height requirement above the treated tooth is small, occupying only about 2mm-2.5mm above the occlusal surface, which can adapt to patients in the molar area or with a small mouth opening.

Claims

1. A three-dimensional positioning and guiding device for opening the pulp passage of root canal treatment based on laser, characterized in that: It includes a tooth surface positioning component and a pulp opening guide component. The tooth surface positioning component is arranged on the dentition. The pulp opening guide component is arranged on the tooth surface positioning component. The tooth surface positioning component includes a positioning shell, an inner clamping ring and an outer clamping ring. The positioning shell is provided with a positioning guide hole. The outer clamping ring is arranged at the positioning guide hole of the positioning shell. The inner clamping ring is movably connected with the outer clamping ring. The pulp opening guide component includes an X-axis support frame, a Y-axis support frame, an X-axis laser emitter and a Y-axis laser emitter. The end of the X-axis support frame and the end of the Y-axis support frame are respectively connected to the outer clamping ring. The other end of the X-axis support frame is provided with an X-axis laser emitter, and the other end of the Y-axis support frame is provided with a Y-axis laser emitter; the inner clamping ring includes a lower guide plane, an inner clamping ring plate and a plurality of retaining blocks. The inner clamping ring plate is provided with an inner guide hole. The bottom of the inner clamping ring plate is provided with a lower guide plane. The lower guide plane is annular. The top of the lower guide plane is evenly surrounded by a plurality of retaining blocks, and gaps are provided between adjacent retaining blocks. The structures of the X-axis support frame and the Y-axis support frame are the same.

2. The three-dimensional positioning and guiding device for the laser-based root canal treatment pulp access according to claim 1, characterized in that: The outer clamping ring component includes an outer clamping ring plate, a clamping block and a stop protrusion. The outer clamping ring plate is provided with an outer guide hole. A plurality of clamping blocks are evenly arranged around the outer guide hole. The inner clamping ring plate is embedded in the outer guide hole. The inner clamping ring plate and the outer clamping ring plate are concentrically arranged. The height of the outer clamping ring plate is not greater than the distance between the retaining block and the lower guide plane. A stop protrusion is provided at the end of the clamping block. A clamping groove for the retaining block to pass through is provided between adjacent clamping blocks.

3. The three-dimensional positioning and guiding device for the laser-based root canal treatment pulp access according to claim 1, characterized in that: The X-axis support frame includes an X-axis support arm and a clamping ring. The X-axis support arm is an L-shaped X-axis support arm. One end of the X-axis support arm is connected to an external clamping ring. The other end of the X-axis support arm is provided with a clamping ring for connecting an X-axis laser transmitter.

4. The three-dimensional positioning and guiding device for the laser-based root canal treatment pulp access according to claim 3, characterized in that: The X-direction laser emitter and the Y-direction laser emitter are respectively arranged in a waterproof housing, and the waterproof housing is respectively provided with a directional convex, and the directional convex is respectively arranged in the laser plane emitted by the X-direction laser emitter or the Y-direction laser emitter. The clamping ring adopts a C-shaped clamping ring, and the clamping ring is provided with an opening for accommodating the directional convex.

5. The three-dimensional positioning and guiding device for the laser-based root canal treatment pulp access according to any one of claims 1 to 3, characterized in that: The X-axis support frame and the Y-axis support frame form an angle of 60°-90°.

6. The three-dimensional positioning and guiding device for the laser-based root canal treatment pulp access according to any one of claims 1 to 3, characterized in that: The height of the inner clamping ring is 2mm-2.5mm, and the diameter of the inner guide hole is 6mm-9mm.

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