Tool for extracting dental pulp tissue

Abstract

The invention discloses a tool for extracting dental pulp tissue, and relates to the field of dental pulp extraction.The tool comprises a handheld handle, a mounting space is formed in the handheld handle, an extraction assembly used for extracting the dental pulp tissue is arranged on one side of the surface of the handheld handle, and the extraction assembly comprises an extraction pipe arranged on the surface of the handheld handle; a plurality of containing grooves used for temporarily storing the dental pulp tissue are formed in one side of the surface of the extraction tube, a plurality of limiting protrusions used for limiting the dental pulp tissue are fixedly arranged on the inner walls of the containing grooves, and an arc-shaped cutting edge used for cutting off the dental pulp tissue is formed in the side, away from the handheld handle, of the surface of the extraction tube. The dental pulp tissue is cut off through the arc-shaped cutting edge of the extraction pipe, breakage of the dental pulp tissue can be effectively reduced in cooperation with the limiting protrusion and the blocking piece in the containing groove, meanwhile, the dental pulp tissue is conveyed in a closed channel formed by the collection cavity, the flow guide groove and the extraction cavity through the negative pressure system, contact with the external environment is avoided, and the pollution risk is reduced; the extraction quality is improved.

Description

Technical Field

[0001] This application relates to the field of dental pulp extraction, and in particular to a tool for extracting dental pulp tissue. Background Technology

[0002] Dental pulp tissue is located inside the pulp cavity of the tooth and is the only soft tissue in the tooth structure. Dental pulp stem cells can be isolated from the dental pulp. Dental pulp stem cells have the potential for multi-lineage differentiation. In addition to being able to form mineralized nodules, they can also differentiate into cell types such as fat, bone, cartilage, muscle, vascular endothelium, liver, and nerve cells after being induced by different cytokines.

[0003] Pulp extraction typically involves a dentist drilling a hole in the tooth and using a sterile sampler to remove a portion of the pulp. During extraction, the pulp tissue is usually exposed to the outside, making it susceptible to contamination. This can reduce the activity of stem cells within the pulp tissue, affecting the purity of subsequent pulp stem cell culture. Additionally, the sampling tip of sterile samplers is often straight or simply curved, which can easily cause tearing or breakage of the pulp tissue during cutting or separating, resulting in some tissue remaining in the root canal and affecting sample integrity. Summary of the Invention

[0004] In order to improve the problem that sterile samplers are easily contaminated and broken when extracting dental pulp tissue, thus affecting the sample, this application provides a tool for extracting dental pulp tissue.

[0005] The tool for extracting dental pulp tissue provided in this application adopts the following technical solution:

[0006] A tool for extracting dental pulp tissue includes a handle, the handle having an internal installation space, and an extraction component for extracting dental pulp tissue disposed on one side of the surface of the handle.

[0007] The extraction assembly includes an extraction tube disposed on the surface of the handle. One side of the surface of the extraction tube has multiple receiving slots for temporarily storing dental pulp tissue. The inner wall of the receiving slots is fixed with multiple limiting protrusions for limiting the dental pulp tissue. The surface of the extraction tube away from the handle has an arc-shaped cutting edge for cutting the dental pulp tissue. The surface of the extraction assembly near the handle has a collection component for collecting the dental pulp tissue.

[0008] By adopting the above technical solution, the extraction tube is inserted deep into the tooth, the pulp tissue is cut with an arc-shaped blade, and the pulp tissue is sucked into the receiving groove by negative pressure. The pulp tissue is then limited by the limiting protrusion, which enhances the fixation effect of the pulp tissue and reduces the probability of pulp tissue breakage. Under continuous negative pressure, the pulp is finally collected by the collection component, so that the tooth is not exposed to the external environment during the extraction process and the pulp tissue is not contaminated.

[0009] Preferably, the extraction assembly further includes a sealing piece fixed inside the receiving groove, the sealing piece being used to seal the receiving groove, and the extraction tube having an extraction cavity inside for extracting dental pulp tissue;

[0010] The sealing plate normally seals the receiving groove, and when the pulp tissue enters, it bends into the extraction cavity to open the channel.

[0011] By adopting the above technical solution, when the dental pulp tissue enters the receiving groove under negative pressure, the thrust of the dental pulp tissue will cause the sealing piece to bend into the extraction tube, opening the receiving groove and allowing the dental pulp tissue to enter the receiving groove.

[0012] Preferably, the collection assembly includes a collection tube inserted inside the installation space, the collection tube having a collection cavity inside, a filter screen for blocking dental pulp tissue fixed inside the collection cavity, a tube cap fixed on the side of the collection tube away from the handle, and a connection port for connecting a negative pressure tube on the side of the tube cap away from the collection tube, with a sealing plug threaded inside the connection port.

[0013] By adopting the above technical solution, a negative pressure tube can be connected to the tube cap through the connection port, so that the negative pressure tube provides negative pressure to the collection chamber, thereby sucking the pulp tissue into the collection chamber and completing the collection of the pulp tissue. At the same time, the filter screen can prevent the pulp tissue from being sucked into the negative pressure tube.

[0014] Preferably, the surface of the collection tube is fixed with an abutting ring that abuts against the side of the handle away from the surface of the extraction tube, and the abutting ring is symmetrically fixed with inserts on the side of the handle near the tube cap.

[0015] By adopting the above technical solution, pulling the collection tube provides power to the abutment ring, enabling the abutment ring to provide power to the insertion block, allowing the insertion block to be freely installed or removed from one side of the handle surface, thereby making the collection tube detachably installed on one side of the handle surface.

[0016] Preferably, positioning blocks that are slidably engaged with the inside of the handle are provided on both sides of the surface of the insertion block, and limiting blocks that are slidably disposed inside the handle are fixedly provided on the surface of the positioning blocks, and a spring that is fixedly disposed inside the handle is fixedly provided at one end of the positioning block near the insertion block.

[0017] By adopting the above technical solution, the positioning block is used to position the insertion block on one side of the handle surface, thereby positioning the collection tube and the handle. The spring force ensures that the collection tube cannot be removed from the handle surface without an external force greater than the spring force, thus guaranteeing the stability of the collection tube during pulp tissue collection.

[0018] Preferably, the hand handle is provided with a flow guiding component for guiding pulp tissue on the side of the surface near the extraction tube;

[0019] The flow guiding assembly includes a flow guiding cylinder threadedly connected to the hand handle near the surface of the extraction tube. The flow guiding cylinder has a flow guiding groove inside, and the inner wall of the flow guiding groove has a spiral groove for guiding the pulp tissue.

[0020] By adopting the above technical solution, with the inlet of the spiral groove directly facing the outlet of the receiving groove, the spiral groove can guide the pulp tissue to move along the spiral trajectory under negative pressure, preventing the pulp tissue from accumulating and blocking inside the extraction tube.

[0021] Preferably, one side of the surface of the extraction tube is provided with a scale line for observing the depth of the extraction tube entering the tooth.

[0022] By adopting the above technical solution and setting graduation lines on the surface of the extraction tube, doctors can accurately determine the depth to which the extraction tube enters the tooth, thus improving the accuracy of the operation.

[0023] Preferably, the surface of the hand handle is provided with an anti-slip layer.

[0024] By adopting the above technical solution, the anti-slip layer increases the friction when the doctor holds the handle, preventing the application from slipping during operation and improving the safety of the operation.

[0025] Preferably, the limiting protrusion is made of medical-grade polyetheretherketone (PEEK).

[0026] By adopting the above technical solution, and by making the limiting protrusions out of medical-grade polyetheretherketone (PEEK) material, the weight of the front end of the extraction tube can be reduced and the operational flexibility improved by utilizing the material's lightweight properties.

[0027] Preferably, the sealing patch is made of medical-grade silicone rubber.

[0028] By adopting the above technical solution, the sealing plate, made of medical-grade silicone rubber, can quickly reposition itself after passing through the dental pulp tissue, and re-cover the opening of the receiving groove, thus achieving a dynamic sealing effect.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. The extraction tube cuts the pulp tissue with its arc-shaped blade. Combined with the limiting protrusions and sealing pieces in the receiving groove, this effectively reduces pulp tissue breakage. At the same time, the negative pressure system transports the pulp tissue within the closed channel formed by the collection cavity, the guide groove, and the extraction cavity, avoiding contact with the external environment, reducing the risk of contamination, and improving extraction quality. Meanwhile, the spiral groove of the guide component guides the pulp tissue to move in a spiral motion, reducing blockage and improving extraction efficiency.

[0031] 2. The collection component adopts a detachable design, using the cooperation of inserts, positioning blocks and springs to achieve quick installation and stable fixation, which facilitates postoperative treatment of the pulp tissue in the collection tube and improves the efficiency of subsequent pulp tissue treatment.

[0032] 3. The graduations on the surface of the extraction tube help doctors determine the depth of entry into the tooth, ensuring the accuracy of the operation. The extraction tube adopts a tapered transition design, and the inner layer of the extraction tube is made of nickel-titanium alloy with shape memory properties, which allows the extraction tube to recover the preset curvature (0-30° adjustable) under body temperature. This better conforms to the pulp direction in the curved root canal, adapts to the shape of different tooth root canals, and improves the applicability of the tool. Attached Figure Description

[0033] Figure 1 This is a three-dimensional structural diagram of the present application;

[0034] Figure 2 For this application Figure 1 Enlarged view of point A in the middle;

[0035] Figure 3 This is a partial three-dimensional structural schematic diagram of this application;

[0036] Figure 4 This is a cross-sectional structural diagram of the handle and collection assembly of this application;

[0037] Figure 5 For this application Figure 4 Enlarged view of point B in the middle;

[0038] Figure 6 This is a three-dimensional structural diagram of the collection component and the flow guiding component in this application;

[0039] Figure 7 This is a three-dimensional structural diagram of the flow guiding component and the extraction component of this application;

[0040] Figure 8 This is a top view of the flow guiding component and the extraction component of this application.

[0041] Figure 9 This is a schematic cross-sectional view of the component extracted in this application;

[0042] Figure 10 For this application Figure 9 Enlarged view of point C in the middle;

[0043] Figure 11 This is a partial cross-sectional structural diagram of the extraction tube in this application.

[0044] Reference numerals: 1. Handle; 11. Mounting space; 12. Slot; 121. Positioning slot;

[0045] 2. Collection component; 21. Collection tube; 211. Collection chamber; 212. Filter screen; 22. Tube cap; 221. Connection port; 23. Sealing plug;

[0046] 24. Abutment ring; 25. Insert block; 251. Storage space; 252. Limiting groove;

[0047] 26. Positioning block; 261. Limiting block; 262. Spring;

[0048] 3. Flow guiding assembly; 31. Flow guiding tube; 311. Flow guiding groove; 312. Spiral groove;

[0049] 4. Extraction component; 41. Extraction tube; 411. Receiving groove; 412. Arc-shaped cutting edge; 413. Extraction cavity; 414. Insertion groove;

[0050] 42. Limiting protrusion; 43. Sealing plate; 431. Insertion plate;

[0051] 44. Scale lines. Detailed Implementation

[0052] The following is in conjunction with the appendix Figures 1-11 This application will be described in further detail.

[0053] This application discloses a tool for extracting dental pulp tissue.

[0054] Reference Figure 1 A tool for extracting dental pulp tissue includes a handle 1, which is cylindrical in shape, with a length of 100-120 mm and a diameter of 15-20 mm. The surface of the handle 1 is provided with an anti-slip layer, which is composed of multiple strips arranged in a ring on the surface of the handle 1. An installation space 11 is provided inside the handle 1 for installing a collection component 2 for collecting dental pulp tissue.

[0055] By providing an anti-slip layer on the surface of the handle 1, the friction of the handle 1 can be increased when the doctor operates it, preventing the application from slipping during operation and improving the safety of operation.

[0056] Reference Figures 1-6The collecting component 2 includes a collecting tube 21 inserted inside the installation space 11. The collecting tube 21 is cylindrical, and its surface abuts against the inner wall of the installation space 11. A collecting cavity 211 is formed inside the collecting tube 211, and a filter 212 for blocking dental pulp tissue is fixed inside the collecting cavity 211. The filter 212 has a micron-sized pore size of 0.2 to 0.3 mm, so that the filter 212 can intercept all dental pulp tissue (diameter ≥ 0.5 mm) and larger debris, while ensuring smooth airflow. (Air permeability ≥80%), to avoid negative pressure loss due to filter screen 212 blockage, a tube cap 22 is fixed on the side of the collection tube 21 away from the handle 1, and a connection port 221 for connecting the negative pressure tube is opened on the side of the tube cap 22 away from the collection tube 21. A sealing plug 23 is threaded inside the connection port 221. When the negative pressure tube does not need to be connected, the connection port 221 is sealed by the sealing plug 23 to prevent pollutants in the external environment from entering the collection chamber 211 from the connection port 221 and contaminating it.

[0057] It should be noted that: the dental treatment unit has a built-in negative pressure system, which is the most commonly used negative pressure device in clinical practice. The built-in negative pressure system of the dental treatment unit is existing technology. The principle of the built-in negative pressure system of the dental treatment unit will not be described in detail. The built-in negative pressure system of the dental treatment unit is integrated into the piping system of the dental treatment unit. It is powered by a central negative pressure source, and the suction range is adjustable (usually -0.5 to -2.5 kPa). It can be directly connected to the connection port 221 through the negative pressure pipe (hose), so that the central negative pressure source can be used as the negative pressure source of this application.

[0058] After each use, filter 212 needs to be cleaned with an ultrasonic cleaner (300W power, 5 minutes) to remove organic matter attached to the surface, and it should be sterilized by high temperature and high pressure once a week.

[0059] By connecting the negative pressure source of the built-in negative pressure system of the dental treatment unit to the connection port 221 through the negative pressure tube, the central negative pressure source is used as the negative pressure source of this application to provide suction to the collection cavity 211.

[0060] Reference Figures 1-6 A contact ring 24 is fixedly provided on the surface of the collection tube 21. When the collection tube 21 is inserted into the installation space 11, the side of the contact ring 24 near the handle 1 abuts against the side of the handle 1 away from the extraction tube 41. A plug 25 is symmetrically fixed on the side of the contact ring 24 near the handle 1. The plug 25 is rectangular. A slot 12 that matches the plug 25 is opened on the side of the handle 1 near the tube cap 22. The surface of the plug 25 abuts against the inner wall of the slot 12. When the end of the plug 25 away from the contact ring 24 abuts against the bottom wall of the slot 12, the end of the plug 25 near the contact ring 24 is on the same horizontal line as the side of the handle 1 near the contact ring 24.

[0061] The insert 25 has storage spaces 251 on both sides of its surface. A positioning block 26 abuts against the inner wall of the storage space 251. The length of the storage space 251 is greater than the overall length of the positioning block 26, allowing the storage space 251 to completely accommodate the positioning block 26. The end of the positioning block 26 furthest from the insert 25 is hemispherical. Positioning grooves 121, which match the end of the positioning block 26 furthest from the insert 25, are formed on both sides of the inner wall of the slot 12. When the positioning block 26 is engaged into the positioning groove 121, the positioning block 26... The surface of the positioning block 26 abuts against the inner wall of the positioning groove 121. The surface of the positioning block 26 is symmetrically fixed with a limiting block 261. The inner walls of the storage space 251 are provided with limiting grooves 252 that are adapted to the limiting block 261. The surface of the limiting block 261 abuts against the inner wall of the limiting groove 252, so that the limiting block 261 can slide stably inside the limiting groove 252. A spring 262 is fixed in the middle of the end of the positioning block 26 near the insertion block 25. The end of the spring 262 away from the positioning block 26 is fixed to the side wall of the slot 12.

[0062] It should be noted that the calculation formula for spring 262 is: F = kx, where F is the external force on spring 262, in N, k is the spring constant of spring 262, in N / m, and x is the deformation of spring 262, in m. The elastic force of spring 262 is then calculated so that it can be used in this application.

[0063] When the insert 25 is aligned with the slot 12 on one side of the handle 1, the collection tube 21 is aligned with the inside of the mounting space 11. The user presses down on the collection tube 21, causing it to enter the mounting space 11. At the same time, the collection tube 21 moves the abutment ring 24 downward, which in turn moves the insert 25 downward, inserting it into the slot 12. During the insertion of the insert 25 into the slot 12, the positioning block 26 is squeezed by the inner wall of the slot 12, causing it to be squeezed into the storage space 251. The positioning block 26 presses the spring 262, causing it to deform.

[0064] When the end surface of the insert block 25 away from the abutment ring 24 abuts against the bottom wall of the slot 12, the positioning block 26 and the positioning groove 121 are directly opposite each other. This causes the positioning block 26 to lose the compressive force from the inner wall of the slot 12, and the spring 262 to lose the pressing force from the positioning block 26. As a result, the spring 262 gradually recovers its deformation. During the process of recovering its deformation, the spring 262 causes the positioning block 26 to pop out of the storage space 251, and the end of the positioning block 26 away from the spring 262 pops into the positioning groove 121. The end surface of the positioning block 26 away from the insertion block 25 abuts against the inner wall of the positioning groove 121, while the side of the abutment ring 24 away from the sealing plug 23 abuts against the surface of the handle 1, and the collection tube 21 stops moving. Thus, the positioning block 26 is inserted into the positioning groove 121 to position the insertion block 25, so that the insertion block 25 is positioned inside the slot 12. The abutment ring 24 is fixed to the surface of the handle 1, thereby fixing the collection tube 21 inside the installation space 11, and completing the installation of the collection tube 21.

[0065] The spring force of the spring 262 ensures that the positioning block 26 cannot detach from the positioning groove 121 unless an external force greater than the spring force of the spring 262 is applied, thus preventing the collection tube 21 from being detached from the surface of the hand handle 1, thereby ensuring the stability of the collection tube 21 during pulp tissue collection.

[0066] After the pulp tissue is extracted, the user can simply pull the collection tube 21 away from the handle 1 to remove the collection tube 21.

[0067] Reference Figures 1-7 A flow guiding component 3 for guiding pulp tissue is provided on the side of the handle 1 near the extraction tube 41. The flow guiding component 3 includes a flow guiding tube 31 threadedly connected to the side of the handle 1 near the extraction tube 41. The end surface of the flow guiding tube 31 near the handle 1 is provided with an external thread. The inner wall of the installation space 11 near the flow guiding tube 31 is provided with an internal thread that engages with the external thread, so that the flow guiding tube 31 is fixed inside the installation space 11 by the engagement of the external thread and the internal thread, thereby allowing the flow guiding tube 31 to be quickly removed from the installation space 11. After the flow guiding tube 31 is fixed inside the installation space 11, the end surface of the flow guiding tube 31 inside the installation space 11 abuts against the end surface of the collection tube 21 away from the sealing plug 23.

[0068] The outer surfaces of the collecting tube 21 and the guide tube 31 are on the same vertical line, and the outer surface of the guide tube 31 abuts against the inner wall of the installation space 11 after positioning. A guide groove 311 is provided inside the guide tube 31, and the collecting cavity 211 is connected to the guide groove 311. A spiral groove 312 for guiding the pulp tissue is provided on the inner wall of the guide groove 311. The spiral groove 312 is a conical channel. The diameter of the end of the spiral groove 312 away from the handle 1 is 0.8 to 1 mm, and the diameter of the end of the spiral groove 312 near the handle 1 is 2 to 2.5 mm. The length of the guide tube 31 and the spiral groove 312 is the same, both being 30 to 40 mm.

[0069] When the dental pulp tissue enters the guide channel 311 under negative pressure, it will move towards the handle 1 with the airflow. At this time, the spiral groove 312 will guide the airflow and dental pulp tissue to move along the spiral trajectory. The spiral groove 312 guides the dental pulp tissue to make spiral motion, and uses centrifugal force to reduce the friction of the tube wall, so that the dental pulp tissue is in a rotating forward state in the spiral groove 312, thereby improving the delivery efficiency of the dental pulp tissue in the guide channel 311 and ensuring the smooth progress of the extraction process.

[0070] Reference Figures 1-10 The surface of the handle 1 is provided with an extraction component 4 for extracting dental pulp tissue. The extraction component 4 includes an extraction tube 41 fixed to the end of the guide tube 31 away from the handle 1. The length of the extraction tube 41 is 15-25 mm. The diameter of the end of the extraction tube 41 near the guide tube 31 is 2-3 mm, and the diameter of the end of the extraction tube 41 away from the guide tube 31 is reduced to 0.8-1.2 mm, so that the extraction tube 41 forms a tapered transition, which facilitates the extraction tube 41 to smoothly enter the root canal inside the tooth. The end of the extraction tube 41 near the guide tube 31 and the end of the extraction tube 41 away from the guide tube 31 are concentrically arranged. A plurality of receiving grooves 411 for temporarily storing dental pulp tissue are opened on one side of the surface of the extraction tube 41. The receiving grooves 411 are distributed at intervals of 2-3 mm along the length direction of the extraction tube 41. The length of each receiving groove 411 is 1.5-2 mm, the radius of the arc cross section is 0.3-0.5 mm, and the opening width is 0.8-1 mm.

[0071] The inner wall of the receiving groove 411 is fixed with a plurality of limiting protrusions 42 for limiting the pulp tissue. The limiting protrusions 42 are hemispherical in shape and have smooth surfaces. The limiting protrusions 42 are distributed at intervals along the length of the receiving groove (411), with a spacing of 0.3 mm between each pair. The extraction tube 41 has an arc-shaped cutting edge 412 for cutting the pulp tissue on the side away from the handle 1. The arc-shaped cutting edge 412 is coated with a diamond coating. The arc of the arc-shaped cutting edge 412 is 120-150°. The tip thickness of the arc-shaped cutting edge 412 is 0.1 mm, which gradually increases to 0.3 mm along the direction away from the receiving groove 411, so that the arc-shaped cutting edge 412 forms a sharp cutting edge with a certain strength. The extraction tube 41 has an extraction cavity 413 for extracting the pulp tissue inside. The receiving groove 411 is connected to the extraction cavity 413.

[0072] By controlling the extraction tube 41 with the handle 1, the arc-shaped cutting edge 412 is aligned with the dental pulp tissue. Since the inner layer of the extraction tube 41 is a nickel-titanium alloy with shape memory properties, it can recover the preset curvature (0-30° adjustable) under body temperature, which can better conform to the direction of the dental pulp in the curved root canal. The arc-shaped cutting edge 412 contacts the area to be cut, and an appropriate pushing force is applied in the direction close to the dental pulp tissue, so that the tip of the arc-shaped cutting edge 412 cuts into the dental pulp tissue with its sharpness. As the pushing force continues, the arc-shaped cutting edge 412 cuts the dental pulp along the arc trajectory, separating the dental pulp from the surrounding tissue. After the dental pulp is cut, under the action of negative pressure, the cut dental pulp tissue will enter the extraction cavity 413 through the receiving groove 411, avoiding the retention of cut dental pulp tissue in the root canal and improving the integrity of the extraction.

[0073] Reference Figures 1-11 The side wall of the receiving groove 411 is provided with an insertion groove 414, the depth of which is 0.5mm. An insertion piece 431 is fixedly provided on the inner wall of the insertion groove 414. A sealing piece 43 is fixedly provided on one side of the surface of the insertion piece 431 to seal the receiving groove 411. The sealing piece 43 seals the receiving groove 411 under normal conditions and bends into the extraction cavity 413 to open the channel when the pulp tissue enters.

[0074] It should be noted that the installation steps for the sealing plate 43 and the receiving groove 411 are as follows:

[0075] First, clean the inner wall of the extraction cavity 413 and the inner wall of the insertion groove 414 by wiping with medical alcohol and then letting them air dry naturally to remove surface oil, impurities, etc., ensuring that the installation surface is clean and improving the bonding strength of the adhesive.

[0076] Apply adhesive: Apply a layer of UV-curable adhesive with a thickness of about 0.02 mm evenly inside the insertion groove 414. During the application process, avoid the adhesive from overflowing into the insertion groove 414 to prevent contamination of other areas of the inner wall of the extraction chamber 413.

[0077] Placement of the sealing piece 43: Hold the sealing piece 43 with special tweezers, align the insertion piece 431 on the sealing piece 43 with the insertion groove 414 and gently place it so that the sealing piece 43 naturally covers the opening of the receiving groove 411, and the end of the sealing piece 43 away from the insertion piece 431 naturally adheres to the inner wall of the extraction head. During the placement process, ensure that the sealing piece 43 is free of wrinkles and displacement.

[0078] Curing process: Use ultraviolet light with a wavelength of 365nm to irradiate the area where the sealing piece 43 is installed. The irradiation time is controlled at about 10 seconds to allow the ultraviolet light curing adhesive to fully cure and firmly fix the insert piece 431 in the insertion groove 414.

[0079] Inspection and adjustment: After curing, check the installation of the sealing piece 43. If the sealing piece 43 is found to be misaligned or not tightly attached, it should be adjusted in time. If necessary, the cured adhesive can be removed and reinstalled.

[0080] When the dental pulp tissue enters the receiving groove 411 under negative pressure, the thrust of the dental pulp tissue will cause the sealing piece 43 to bend into the extraction cavity 413 (maximum bending angle 30°), opening the channel of the receiving groove 411; after the tissue passes through, the sealing piece 43 relies on its own elasticity to reset and cover the receiving groove 411 again, realizing dynamic sealing.

[0081] Reference Figure 1 - Figure 2 The extraction tube 41 has a scale line 44 on one side of its surface for observing the depth of the extraction tube 41 entering the tooth. The scale line 44 is in mm and is marked with a medical-grade laser to form a permanent mark on the surface of the extraction tube 41. The mark is clear, wear-resistant, and unaffected by sterilization, making it easy for doctors to observe the insertion depth.

[0082] By setting graduation lines 44 on the surface of the extraction tube 41, doctors can accurately determine the depth to which the extraction tube 41 enters the tooth, thus improving the accuracy of the operation.

[0083] It should be added that: This application uses 70% to 75% ethanol for wiping disinfection. Sterile gauze is soaked in ethanol to wipe the entire surface, grooves and gaps of the application structure, focusing on removing residual cell debris. Let it stand for 10 to 15 minutes to allow the ethanol to evaporate, thereby disinfecting the application and ensuring a sterile environment for the application.

[0084] Handle 1 and insertion block 25 are made of medical-grade ABS plastic, collection tube 21 is made of transparent medical-grade polycarbonate (PC), filter screen 212 is made of medical-grade 316L stainless steel, positioning block 26 and limiting block 261 are made of medical-grade polyoxymethylene (POM), spring 262 is made of medical-grade stainless steel wire (3 extraction component 4 material), guide tube 31 is made of medical-grade titanium alloy, limiting protrusion 42 is made of medical-grade polyetheretherketone, the inner layer of extraction tube 41 is made of nickel-titanium alloy and the outer layer is made of medical-grade stainless steel in close contact, the arc-shaped blade 412 is made of medical-grade high-speed steel, and sealing plug 23 and sealing plate 43 are made of medical-grade silicone rubber.

[0085] When the extraction tube 41 is inserted into the root canal, the root canal wall will naturally adhere to the surface of the extraction tube 41, partially covering the opening of the receiving groove 411, further reducing the air leakage pressure difference (actual measurement shows that the negative pressure loss rate is ≤5%), ensuring that the inside of the extraction cavity 413 can still maintain an effective negative pressure (-0.5 to -2 kPa).

[0086] Before use, the hand handle 1, the collection component 2, and the flow guiding component 3 are in a separate state.

[0087] The implementation principle of the tool for extracting dental pulp tissue in this application embodiment is as follows: After disinfection, the user wears sterile gloves and a sterile gown, aligns the insert 25 with the slot 12 on one side of the handle 1, and the collection tube 21 is aligned with the inside of the installation space 11. The user presses down on the collection tube 21 to allow it to enter the installation space 11. At the same time, the collection tube 21 moves the abutment ring 24 downward, and the abutment ring 24 moves the insert 25 downward, so that the insert 25 is inserted into the slot 12. During the insertion of the insert 25 into the slot 12, the positioning block 26 is squeezed from the inner wall of the slot 12, so that the positioning block 26 is squeezed into the storage space 251. The positioning block 26 presses the spring 262, causing the spring 262 to deform.

[0088] When the end surface of the insert block 25 away from the abutment ring 24 abuts against the bottom wall of the slot 12, the positioning block 26 and the positioning groove 121 are directly opposite each other. This causes the positioning block 26 to lose the compressive force from the inner wall of the slot 12, and the spring 262 to lose the pressing force from the positioning block 26. As a result, the spring 262 gradually recovers its deformation. During the process of recovering its deformation, the spring 262 causes the positioning block 26 to pop out of the storage space 251, and the end of the positioning block 26 away from the spring 262 pops into the positioning groove 121. The end surface of the positioning block 26 away from the insertion block 25 abuts against the inner wall of the positioning groove 121, while the side of the abutment ring 24 away from the sealing plug 23 abuts against the surface of the handle 1, and the collection tube 21 stops moving. Thus, the positioning block 26 is inserted into the positioning groove 121 to position the insertion block 25, so that the insertion block 25 is positioned inside the slot 12. The abutment ring 24 is fixed to the surface of the handle 1, thereby fixing the collection tube 21 inside the installation space 11, and completing the installation of the collection tube 21.

[0089] The spring force of the spring 262 ensures that the positioning block 26 cannot detach from the positioning groove 121 unless an external force greater than the spring force of the spring 262 is applied, thus preventing the collection tube 21 from being detached from the surface of the hand handle 1, thereby ensuring the stability of the collection tube 21 during pulp tissue collection.

[0090] By rotating the guide tube 31 clockwise, the external thread on the surface of the guide tube 31 engages with the internal thread inside the installation space 11, fixing the guide tube 31 to the end of the handle 1 away from the collection tube 21 through the engagement of the external and internal threads. This causes the end of the guide tube 31 away from the extraction tube 41 to abut against the end of the collection tube 21 away from the sealing plug 23, connecting the collection cavity 211, the guide groove 311, and the extraction cavity 413 to form a total guide channel for the pulp tissue, providing a closed environment for the extraction of the pulp tissue.

[0091] The user manually rotates the sealing plug 23 counterclockwise to disengage it from the inside of the connection port 221. After the sealing plug 23 is completely disengaged from the inside of the connection port 221, the negative pressure tube (hose) is threadedly connected to the connection port 221, thereby providing power through the central negative pressure source, making the central negative pressure source the negative pressure source of this application.

[0092] A high-speed turbine handpiece is used to drill holes in the patient's teeth. The drilling process is existing technology, and the details of the process and principle will not be described in detail. After drilling, the user controls the extraction tube 41 by holding the handle 1, aligning the extraction tube 41 with the drilled hole in the tooth, and inserting the extraction tube 41 into the root canal. During insertion, the curved cutting edge 412 is aligned with the pulp tissue. Because the inner layer of the extraction tube 41 is a nickel-titanium alloy with shape memory properties, it can recover the preset curvature (adjustable from 0-30°) under body temperature, which can better conform to the curved root canal. Guided by the direction of the dental pulp, the curved cutting edge 412 contacts the area to be cut. Rotate the handle 1 to adjust the angle of the curved cutting edge 412, aligning it with the dental pulp tissue at a 120-150° angle. Apply axial thrust, and the 0.1mm thick cutting tip cuts into the tissue, completing the cut along the curved trajectory, separating the dental pulp from the surrounding tissue. After the dental pulp is cut, under negative pressure, the cut dental pulp tissue will enter the extraction cavity 413 through the receiving groove 411, avoiding the retention of cut dental pulp tissue in the root canal and improving the integrity of the extraction.

[0093] The built-in negative pressure system of the dental treatment unit is activated, which generates negative pressure inside the collection cavity 211, and in turn generates negative pressure in the guide channel 311 and the extraction cavity 413. Under the action of negative pressure, the pulp tissue enters the receiving cavity 411. The thrust of the pulp tissue causes the sealing piece 43 to bend into the extraction cavity 413 (maximum bending angle 30°), opening the channel of the receiving cavity 411, allowing the pulp tissue to enter the extraction cavity 413 under the action of negative pressure. After the pulp tissue has passed through, the sealing piece 43 returns to its original position by its own elasticity and covers the receiving cavity 411 again, achieving dynamic sealing.

[0094] Under negative pressure, the pulp tissue enters the guide groove 311 from the extraction cavity 413. After entering the guide groove 311 under negative pressure, the pulp tissue moves towards the handle 1 with the airflow. At this time, the spiral groove 312 guides the airflow and pulp tissue to move along the spiral trajectory, so that the pulp tissue is in a rotating forward state in the spiral groove 312. This prevents the pulp tissue from sticking to a fixed position and reduces the possibility of blockage caused by local accumulation. The centrifugal force generated by the spiral motion can promote the pulp tissue to gather towards the center of the channel, reduce the frictional resistance with the inner wall of the guide groove 311, thereby improving the delivery efficiency of the pulp tissue in the guide groove 311 and ensuring the smooth progress of the extraction process.

[0095] Under negative pressure, the dental pulp tissue enters the collection chamber 211 from the inside of the guide groove 311. It is blocked by the filter screen 212, preventing the dental pulp tissue from entering the negative pressure tube.

[0096] When the extraction tube 41 is repeatedly inserted, if no more tissue is adsorbed in the receiving groove 411, stop the cutting and adsorption operation. At this time, it is necessary to continue to maintain negative pressure for 1 to 2 seconds to ensure that the residual tissue in the extraction cavity 413 and the guide channel 311 is completely transported to the collection cavity 211. Then, turn off the built-in negative pressure system of the dental unit.

[0097] After extraction of dental pulp tissue, the user needs to flip the handle 1 so that the end of the extraction tube 41 with the tube cap 22 is at the lower end of this application, so that the extraction tube 41 faces upward. This allows the user to simply pull the collection tube 21 away from the handle 1 to disassemble the collection tube 21, so that the collection tube 21 can be moved out of the installation space 11 by pulling downward. The removed collection tube 21 can be directly connected to a commonly used sample processing container in the laboratory (such as pouring through a standard interface), or the dental pulp tissue can be removed with tweezers.

[0098] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A tool for extracting dental pulp tissue, characterized in that: Includes a hand handle (1), the inside of which is provided with an installation space (11), and an extraction component (4) for extracting dental pulp tissue is provided on one side of the surface of the hand handle (1); The extraction component (4) includes an extraction tube (41) disposed on the surface of the handle (1). A plurality of receiving grooves (411) for temporarily storing dental pulp tissue are provided on one side of the surface of the extraction tube (41). A plurality of limiting protrusions (42) for limiting the dental pulp tissue are fixed on the inner wall of the receiving groove (411). An arc-shaped cutting edge (412) for cutting the dental pulp tissue is provided on the side of the extraction tube (41) away from the handle (1). A collection component (2) for collecting dental pulp tissue is provided on the side of the extraction component (4) close to the handle (1).

2. The tool for extracting dental pulp tissue according to claim 1, characterized in that: The extraction assembly (4) also includes a sealing piece (43) fixed inside the receiving groove (411), the sealing piece (43) is used to seal the receiving groove (411), and the extraction tube (41) has an extraction cavity (413) for extracting dental pulp tissue inside; The sealing piece (43) seals the receiving groove (411) under normal conditions, and bends into the extraction cavity (413) to open the channel when the pulp tissue enters.

3. The tool for extracting dental pulp tissue according to claim 1, characterized in that: The collection assembly (2) includes a collection tube (21) inserted inside the installation space (11). The collection tube (21) has a collection cavity (211) inside. A filter (212) for blocking dental pulp tissue is fixed inside the collection cavity (211). A tube cap (22) is fixed on the side of the collection tube (21) away from the handle (1). A connection port (221) for connecting a negative pressure tube is opened on the side of the tube cap (22) away from the collection tube (21). A sealing plug (23) is threaded inside the connection port (221).

4. The tool for extracting dental pulp tissue according to claim 3, characterized in that: The surface of the collection tube (21) is fixed with an abutting ring (24) that abuts against the side of the handle (1) away from the extraction tube (41). The abutting ring (24) is symmetrically fixed with a plug (25) inserted into the side of the handle (1) near the tube cap (22).

5. The tool for extracting dental pulp tissue according to claim 4, characterized in that: The insert (25) has a positioning block (26) that is slidably engaged with the inside of the handle (1) on both sides of its surface. The positioning block (26) has a limiting block (261) that is slidably disposed inside the handle (1) on its surface. The positioning block (26) has a spring (262) that is fixed inside the handle (1) at one end near the insert (25).

6. The tool for extracting dental pulp tissue according to claim 1, characterized in that: The hand handle (1) is provided with a flow guiding component (3) for guiding pulp tissue on the side of the surface near the extraction tube (41); The flow guiding assembly (3) includes a flow guiding tube (31) threadedly connected to the side of the hand handle (1) near the surface of the extraction tube (41). The flow guiding tube (31) has a flow guiding groove (311) inside, and the inner wall of the flow guiding groove (311) has a spiral groove (312) for guiding the pulp tissue.

7. The tool for extracting dental pulp tissue according to claim 1, characterized in that: The extraction tube (41) has a scale line (44) on one side of its surface for observing the depth of the extraction tube (41) entering the tooth.

8. The tool for extracting dental pulp tissue according to claim 1, characterized in that: The surface of the hand handle (1) is provided with an anti-slip layer.

9. The tool for extracting dental pulp tissue according to claim 1, characterized in that: The limiting protrusion (42) is made of medical-grade polyetheretherketone material.

10. A tool for extracting dental pulp tissue according to claim 2, characterized in that: The sealing patch (43) is made of medical-grade silicone rubber.

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