A dental pulp extraction device and method for obtaining clean dental pulp stem cells

Abstract

The present invention discloses a dental pulp extraction device and method for obtaining clean dental pulp stem cells, and relates to the technical field of dental pulp extraction. The device comprises a housing, a driving motor is vertically installed in the housing, a cam is installed on the output shaft of the driving motor, a spring B is installed above the cam, a reciprocating plate is installed below the cam, a lifting cylinder is installed inside the reciprocating plate, a coil and a magnetorheological fluid are installed between the reciprocating plate and the lifting cylinder, a cutting wheel is installed below the reciprocating plate, a needle is installed in the lifting cylinder, a drilling sheet is installed on the lower side of the lifting cylinder, the cam drives the cutting wheel to vibrate at high speed, the cutting wheel cuts the teeth, and the drilling sheet drills the teeth, the spring B controls the state of the cam, the coil controls the state of the magnetorheological fluid, the magnetorheological fluid realizes the power control between the cam and the lifting cylinder, and the needle cooperates with the extraction pump to realize the extraction and transportation of dental pulp.

Description

Technical Field

[0001] The present invention relates to the technical field of dental pulp extraction, in particular to a dental pulp extraction device and method for obtaining clean dental pulp stem cells. Background Art

[0002] Dental pulp is the soft tissue inside the tooth. Dental pulp stem cells are usually obtained by extracting the dental pulp. The staff first removes the hard substances on the tooth surface, then drills a hole in the tooth and extracts the dental pulp. During this process, a variety of tools are needed to achieve the final pulp extraction, which is inconvenient to use and causes certain troubles to the staff. Currently, the main method used is to perform curved cutting on the tooth surface using a cutting device. This cutting method can easily cause tooth tissue to splash, thereby damaging the dental pulp and making the dental pulp turbid, which has an adverse effect on the subsequent extraction of stem cells. Therefore, the current dental pulp extraction devices have the following main problems: (1) A variety of tools are required to achieve pulp extraction, which is inconvenient to use; (2) Most of them are rotary cutting methods, which can easily cause pulp damage. Summary of the invention

[0003] The object of the present invention is to provide a dental pulp extraction device and method for obtaining clean dental pulp stem cells, so as to solve the problems raised in the above-mentioned background technology.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: A dental pulp extraction device that can obtain clean dental pulp stem cells: comprising a shell, a driving motor is vertically installed in the shell, a cam is installed on the output shaft of the driving motor, a spring B is installed above the cam, a reciprocating plate is installed below the cam, a lifting cylinder is installed inside the reciprocating plate, a coil and a magnetorheological fluid are installed between the reciprocating plate and the lifting cylinder, a cutting wheel is installed below the reciprocating plate, a needle is installed in the lifting cylinder, a drilling plate is installed on the lower side of the lifting cylinder, the cam drives the cutting wheel to vibrate at a high speed, the cutting wheel cuts the teeth, and the drilling plate drills holes in the teeth, the spring B controls the state of the cam, the coil controls the state of the magnetorheological fluid, and the magnetorheological fluid realizes power control between the cam and the lifting cylinder.

[0005] A sliding plate is rotatably installed on the upper side of the cam through a bearing, and a plurality of guide shafts A are installed on the sliding plate. The plurality of guide shafts A are slidably installed on the outer shell, and the spring B is sleeved on the guide shaft A. One end of the spring B is installed on the cam, and the other end of the spring B is installed on the outer shell. A sleeve structure is provided on the lower side of the cam, and the inner wall of the sleeve structure is rotatably sealed and connected to the outer side of the lifting cylinder. The sleeve structure and the outer side of the lifting cylinder form a first chamber, and the coil is sleeved on the lifting cylinder and arranged in the first chamber. The magnetorheological fluid is arranged in the first chamber and contacts with the coil. A protrusion structure is provided on the outer side of the cam, and a groove structure is provided on the outer side of the reciprocating plate. The protrusion structure and the groove structure are matched.

[0006] The reciprocating plate is provided with a guide shaft B, and the reciprocating plate is slidably mounted on the housing through the guide shaft B. A spring A is sleeved on the guide shaft B, and one end of the spring A is mounted on the reciprocating plate, and the other end of the spring A is mounted on the housing.

[0007] The two ends of the spring A are connected to the control system, the two ends of the spring B are electrically connected to the control system, the two ends of the coil are electrically connected to the control system, the outer side of the cutting wheel is provided with a toothed structure, the interior of the needle is a hollow structure, the lower end of the needle is provided with a needle, and the needle is connected to the inside of the needle.

[0008] The longitudinal section of the lifting cylinder is "V"-shaped, and an extraction pump is installed in the lifting cylinder. The extraction pump is installed in the middle of the lifting cylinder and is arranged above the needle. The extraction pump is electrically connected to the control system, and the inlet of the extraction pump is connected to the needle and the interior of the lifting cylinder through pipelines respectively. The needle is slidably installed on the lifting cylinder through a spring, and the needle is slidingly and sealingly connected to the lifting cylinder. A first control valve is installed in the pipeline connected to the inlet of the extraction pump, and the first control valve is electrically connected to the control system.

[0009] A storage chamber is provided on the upper side of the shell, and the storage chamber is provided on the lower side of the driving motor. A first channel is provided in the output shaft of the driving motor. An air slip ring is installed above the extraction pump, and the air slip ring is installed on the lifting cylinder. The outlet of the extraction pump is connected to the air slip ring through a pipeline, and the air slip ring is communicated with the lower side of the first channel through a pipeline. The upper side of the first channel is communicated with the storage chamber. A control valve A is installed in the first channel, and the control valve A is electrically connected to the control system. A first outlet is provided on the shell facing the storage chamber.

[0010] Press the start button on the control panel to start the extraction device. The extraction pump starts working first, and the control valve A opens. The extraction pump transports the air in the lifting cylinder to the storage chamber through the pipeline, the air slip ring and the first channel. The first outlet is opened to discharge the air to the outside of the device. The pressure in the lifting cylinder is reduced, and a sliding seal connection is formed between the needle and the lifting cylinder through a spring. The pressure on the lower side of the needle is greater than that on the upper side. The needle stretches the spring and moves upward, and the needle retracts into the lifting cylinder. After that, the control valve A is closed, the lifting cylinder is sealed, and the needle is in a stationary state.

[0011] Spring B is connected to the circuit by the control system. When current is passed through spring B for the first time, spring B will shorten. Spring B pulls the cam to move upward a certain distance. The cam pulls the lifting cylinder to move upward. The lifting cylinder pulls the drilling plate to move upward. The cam and the driving motor drive the cam to rotate. When the raised structure on the cam contacts the reciprocating plate, the cam presses the reciprocating plate to move downward through the raised structure. The reciprocating plate compresses spring A. After that, when the raised structure on the cam contacts the groove structure on the reciprocating plate, spring A is released. Spring A pushes the reciprocating plate to move upward. The reciprocating plate drives the cutting wheel to move back and forth up and down. That is, when the cam is rotating, the cutting wheel is in a state of reciprocating up and down. At this time, the tooth structure on the cutting wheel contacts the tooth surface. The tooth structure moves up and down at a high speed to form high-speed vibration cutting to remove the hard substances on the tooth surface. Since this removal method is high-speed up and down vibration cutting, the impurities after removal will not be thrown away, and the impurities will be prevented from being thrown into the pulp and damaging the pulp, so a clean pulp can be obtained.

[0012] During the process of removing hard substances from the tooth surface, the filling pump sprays cleaning liquid through the spray pipe. The cleaning liquid can be an agent for maintaining pulp activity or a cleaning agent, which can be flexibly used according to actual occasions.

[0013] Spring B is powered off by the control system, and both ends of spring B will become longer. Under the action of gravity, the lifting cylinder moves downward, and the lifting cylinder drives the drilling plate to move downward synchronously, so that the drilling plate moves to the bottom of the cutting wheel. Spring A is connected to the circuit by the control system, and both ends of spring A will shorten. Spring A pulls the reciprocating plate downward. At this time, the groove structure on the reciprocating plate will not contact the convex structure on the cam. The coil is connected to the circuit by the control system, and the coil will generate a magnetic field. The magnetic field causes the magnetorheological fluid in the first chamber to change from liquid to solid. The magnetorheological fluid fixes the cam and the lifting cylinder, and the drive motor drives the cam to rotate. The upper protrusion structure does not contact the groove structure on the reciprocating plate, so the reciprocating plate does not reciprocate up and down, that is, the cutting wheel does not work, and the cam drives the lifting cylinder to rotate through the magnetorheological fluid, and the lifting cylinder drives the drilling piece to rotate, and the drilling piece is brought into contact with the position where the tooth needs to be drilled, and the tooth can be drilled. Magnetorheological fluid is a prior art, and the magnetorheological fluid will change its state due to the influence of the magnetic field. When the magnetorheological fluid does not contact the magnetic field, the magnetorheological fluid presents a Newtonian fluid state. When the magnetorheological fluid contacts the magnetic field, the magnetorheological fluid becomes a solid-like form under the action of the magnetic field, has a strong shear strength, and can transmit the torque between the lifting cylinder and the cam.

[0014] After drilling the tooth, control valve A and the first outlet are both opened, and external air passes through the first channel, control valve A, pipeline, air slip ring and extraction pump to increase the pressure in the lifting cylinder, and the needle in the lifting cylinder moves the compression spring downward, so that one end of the needle moves to the bottom of the cutting wheel. At this time, the needle is inserted into the position of the previous drilling so that one end of the needle contacts the pulp, and the extraction pump starts working. The extraction pump extracts the pulp through the needle, and the extracted pulp enters the storage chamber through the pipeline, air slip ring, control valve A and the first channel, and the first outlet is opened to take out the pulp.

[0015] A control panel is installed on the shell, a control system is arranged inside the control panel, a start button, a stop button and an emergency stop button are arranged on the control panel, a liquid spray pipe is arranged on the shell, the water injection pump is connected to the liquid spray pipe through a pipeline, the water injection pump is installed on the shell, and a structure is arranged on the shell for easy hand holding.

[0016] A method for obtaining clean dental pulp stem cells:

[0017] S1, remove the hard tissue on the tooth surface by cutting wheel;

[0018] S2, drilling the teeth using a drilling piece;

[0019] S3, insert the needle into the drilling position and make contact with the pulp;

[0020] S4, the extraction pump extracts the pulp into the storage chamber;

[0021] S5. Open the first outlet on the storage chamber and take out the dental pulp.

[0022] The step S1 also includes the following specific steps:

[0023] S101, the cam drives the cutting wheel to vibrate back and forth at high speed to remove hard tissue on the tooth surface;

[0024] S102, the control system determines the state of the cam by detecting the current in the spring B;

[0025] S103, the filling pump sprays the cleaning liquid through the liquid spray pipe.

[0026] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0027] 1. The integrated design of cutting, drilling and extraction is highly practical. The reciprocating plate drives the cutting wheel to move up and down. The cutting wheel is in an up and down reciprocating state. The toothed structure on the cutting wheel contacts the tooth surface. The toothed structure moves up and down at high speed to form high-speed vibration cutting to remove the hard substances on the tooth surface. Since this removal method is high-speed up and down vibration cutting, the impurities after removal will not be thrown away, and the impurities will not be thrown into the pulp and damage the pulp. Clean pulp can be obtained. The lifting cylinder drives the drilling piece to rotate, and the drilling piece contacts the position of the tooth that needs to be drilled, and the tooth can be drilled. The extraction pump extracts the pulp through the needle. The extracted pulp enters the storage chamber through the pipeline, the air slip ring, the control valve A and the first channel. The first outlet is opened to take out the pulp to ensure that the pulp is clean.

[0028] 2. Reciprocating vibration cuts the tooth surface to reduce the possibility of pulp damage. High-speed up and down vibration cutting will not throw away the removed impurities, avoid impurities being thrown into the pulp and damaging it, and obtain clean pulp. In the process of removing hard substances on the tooth surface, the filling pump sprays the cleaning liquid through the spray pipe. The cleaning liquid can be a reagent to maintain the activity of the pulp or a cleaning reagent. It can be flexibly used according to the actual situation to further enhance the activity of the pulp and improve the success rate of stem cell extraction.

[0029] 3. Automatic pulp extraction, no need to change tools, can adapt to complex environment needs. After drilling the tooth, the external air increases the pressure in the lifting cylinder, the needle in the lifting cylinder will compress the spring downward, so that one end of the needle moves to the bottom of the cutting wheel, the needle is inserted into the position of the previous drilling, so that one end of the needle contacts the pulp, the extraction pump starts to work, the extraction pump extracts the pulp through the needle, the extracted pulp enters the storage chamber through the pipeline, air slip ring, control valve A and the first channel, the first outlet is opened, the pulp is taken out, and the pulp extraction is ensured to be clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 yes Figure 1 Full section view on the left side;

[0033] Figure 3 yes Figure 2 A partial enlarged view of the middle A area;

[0034] Figure 4 yes Figure 2 Schematic diagram of the structure after removing part of the outer shell and the liquid spray pipe;

[0035] Figure 5 yes Figure 4 Schematic diagram of the structure after removing the drive motor, etc.;

[0036] Figure 6 yes Figure 5 Schematic diagram of the structure after removing the spring A, guide shaft A, cam and sliding plate;

[0037] Figure 7 yes Figure 6 Schematic diagram of the structure after removing the reciprocating plate, spring A, guide shaft B and cutting wheel;

[0038] Figure 8 yes Figure 7 Longitudinal section view of .

[0039] In the figure: 1. control panel; 11. housing; 12. spray pipe; 13. extraction pump; 14. storage chamber; 2. drive motor; 21. reciprocating plate; 211. spring A; 212. first channel; 22. cam; 221. spring B; 23. cutting wheel; 24. lifting cylinder; 241. coil; 242. magnetorheological fluid; 25. needle; 26. sliding plate; 27. drilling plate; 28. air slip ring. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] See also Figure 1-Figure 8The present invention provides a technical solution: a dental pulp extraction device capable of obtaining clean dental pulp stem cells: comprising a shell 11, a driving motor 2 is vertically installed in the shell 11, a cam 22 is installed on the output shaft of the driving motor 2, a spring B221 is installed above the cam 22, a reciprocating plate 21 is installed below the cam 22, a lifting cylinder 24 is installed inside the reciprocating plate 21, a coil 241 and a magnetorheological fluid 242 are installed between the reciprocating plate 21 and the lifting cylinder 24, a cutting wheel 23 is installed below the reciprocating plate 21, a needle 25 is installed in the lifting cylinder 24, a drilling piece 27 is installed on the lower side of the lifting cylinder 24, the cam 22 drives the cutting wheel 23 to vibrate at a high speed, the cutting wheel 23 cuts the teeth, the drilling piece 27 drills the teeth, the spring B221 controls the state of the cam 22, the coil 241 controls the state of the magnetorheological fluid 242, the magnetorheological fluid 242 realizes the power control between the cam 22 and the lifting cylinder 24, and A control panel 1 is provided in the control panel 1. A start button, a stop button and an emergency stop button are provided on the control panel 1. A liquid spray pipe 12 is provided on the housing 11. The water injection pump is connected to the liquid spray pipe 12 through a pipeline. The water injection pump is installed on the housing 11. The housing 11 is provided with a structure that is convenient for human hand holding. A storage chamber 14 is provided on the upper side of the housing 11. The storage chamber 14 is provided on the lower side of the driving motor 2. A first channel 212 is provided in the output shaft of the driving motor 2. An air slip ring 28 is installed above the extraction pump 13. The air slip ring 28 is installed on the lifting cylinder 24. The outlet of the extraction pump 13 is connected to the air slip ring 28 through a pipeline. The air slip ring 28 is communicated with the lower side of the first channel 212 through a pipeline. The upper side of the first channel 212 is communicated with the storage chamber 14. A control valve A is installed in the first channel 212. The control valve A is electrically connected to the control system. A first outlet is provided on the housing 11 facing the storage chamber 14.

[0042] A sliding plate 26 is rotatably installed on the upper side of the cam 22 through a bearing, and a plurality of guide shafts A are installed on the sliding plate 26. The plurality of guide shafts A are slidably installed on the housing 11. A spring B221 is sleeved on the guide shaft A. One end of the spring B221 is installed on the cam 22, and the other end of the spring B221 is installed on the housing 11. A sleeve structure is provided on the lower side of the cam 22. The inner wall of the sleeve structure is rotatably sealed and connected to the outer side of the lifting cylinder 24. The sleeve structure and the outer side of the lifting cylinder 24 form a first chamber. The coil 241 is sleeved on the lifting cylinder 24 and arranged in the first chamber. The magnetorheological fluid 242 is arranged in the first chamber and contacts with the coil 241. A convex structure is provided on the outer side of the cam 22, and a groove structure is provided on the outer side of the reciprocating plate 21. The convex structure and the groove structure are matched. A guide shaft B is provided on the reciprocating plate 21. The reciprocating plate 21 is slidably installed on the housing 11 through the guide shaft B. A spring A211 is sleeved on the guide shaft B. The spring A2 One end of spring A211 is mounted on the reciprocating plate 21, and the other end of spring A211 is mounted on the housing 11. Both ends of spring A211 are connected to the control system, both ends of spring B221 are electrically connected to the control system, and both ends of coil 241 are electrically connected to the control system. A toothed structure is arranged on the outer side of the cutting wheel 23. The longitudinal section of the lifting cylinder 24 is "V"-shaped. An extraction pump 13 is installed in the lifting cylinder 24. The extraction pump 13 is installed in the middle of the lifting cylinder 24 and is arranged above the needle 25. The extraction pump 13 is electrically connected to the control system. The inlet of the extraction pump 13 is connected to the interior of the needle 25 and the lifting cylinder 24 through a pipeline respectively. The needle 25 is slidably mounted on the lifting cylinder 24 through a spring. The needle 25 is slidably and sealedly connected to the lifting cylinder 24. The interior of the needle 25 is a hollow structure. A needle is arranged at the lower end of the needle 25, and the needle is connected to the interior of the needle 25. A first control valve is installed in the pipeline of the inlet and the level of the extraction pump 13, and the first control valve is electrically connected to the control system.

[0043] A method for obtaining clean dental pulp stem cells:

[0044] S1, removing the hard tissue on the tooth surface by the cutting wheel 23;

[0045] S2, drilling the teeth using the drilling sheet 27;

[0046] S3, inserting the needle 25 into the drilling position and contacting it with the dental pulp;

[0047] S4, the extraction pump 13 extracts the dental pulp into the storage chamber 14;

[0048] S5. Open the first outlet on the storage chamber 14 and take out the dental pulp.

[0049] The step S1 also includes the following specific steps:

[0050] S101, the cam 22 drives the cutting wheel 23 to vibrate back and forth at high speed to remove hard tissue on the tooth surface;

[0051] S102, the control system determines the state of the cam 22 by detecting the current in the spring B221;

[0052] S103 , the filling pump sprays the cleaning liquid through the liquid spray pipe 12 .

[0053] The working principle of the present invention is as follows: the start button on the control panel 1 is pressed, the extraction device is started, the extraction pump 13 starts working first, the control valve A is opened and the first control valve is opened, the inlet on the extraction pump 13 is connected to the inside of the lifting cylinder 24 through a pipeline, the first control valve is installed in the inlet pipeline on the extraction pump 13, the extraction pump 13 extracts the air in the lifting cylinder 24 into the storage chamber 14 through the pipeline, the air slip ring 28 and the first channel 212, and opens the first outlet to discharge the air to the outside of the device. At this time, the pressure in the lifting cylinder 24 is reduced, and a sliding sealing connection is formed between the needle 25 and the lifting cylinder 24 through a spring. Since the interior of the needle 25 is a hollow structure, the upper side of the needle 25 is directly adsorbed by the negative pressure air, so the pressure on the lower side of the needle 25 is greater than the upper side, the needle 25 stretches the spring to move upward, and the needle 25 retracts into the lifting cylinder 24. After that, the control valve A and the first control valve are both closed, the lifting cylinder 24 is sealed, and the needle 25 is in a stationary state.

[0054] The spring B221 is connected to the circuit by the control system. When the current is supplied to the spring B221 for the first time, the spring B221 will be shortened. The spring B221 pulls the cam 22 to move upward a certain distance. The cam 22 pulls the lifting cylinder 24 to move upward. The lifting cylinder 24 pulls the drilling plate 27 to move upward. The cam 22 and the driving motor 2 drive the cam 22 to rotate. When the raised structure on the cam 22 contacts the reciprocating plate 21, the cam 22 presses the reciprocating plate 21 to move downward through the raised structure. The reciprocating plate 21 compresses the spring A211. After that, the raised structure on the cam 22 and the groove structure on the reciprocating plate 21 are aligned. When in contact, spring A211 is released, and spring A211 pushes the reciprocating plate 21 to move upward, and the reciprocating plate 21 drives the cutting wheel 23 to move back and forth up and down, that is, when the cam 22 is rotating, the cutting wheel 23 is in a state of reciprocating up and down movement. At this time, the tooth structure on the cutting wheel 23 contacts the tooth surface, and the tooth structure moves up and down at high speed to form high-speed vibration cutting to remove the hard substances on the tooth surface. Due to this removal method, which is high-speed up and down vibration cutting, the impurities after removal will not be thrown away, and the impurities will not be thrown into the pulp and cause damage to the pulp, so a clean pulp can be obtained.

[0055] During the process of removing the hard substances on the tooth surface, the filling pump sprays the cleaning liquid through the liquid spray pipe 12. The cleaning liquid can be a reagent for maintaining the activity of the dental pulp or a cleaning reagent. It can be flexibly used according to the actual situation.

[0056] The control system cuts off the power to spring B221, and both ends of spring B221 will become longer. Under the action of gravity, the lifting cylinder 24 moves downward, and the lifting cylinder 24 drives the drilling plate 27 to move downward synchronously, so that the drilling plate 27 moves to the bottom of the cutting wheel 23. The control system connects the circuit to spring A211, and both ends of spring A211 will shorten. Spring A211 pulls the reciprocating plate 21 downward. At this time, the groove structure on the reciprocating plate 21 will not contact the protruding structure on the cam 22. The control system connects the circuit to coil 241, and coil 241 will generate a magnetic field. The magnetic field causes the magnetorheological fluid 242 in the first chamber to change from liquid to solid. The magnetorheological fluid 242 fixes the cam 22 to the lifting cylinder 24, and the drive motor 2 drives the cam 22 to rotate. The cam 22 rotates, and the raised structure on the cam 22 does not contact the groove structure on the reciprocating plate 21, so the reciprocating plate 21 does not reciprocate up and down, that is, the cutting wheel 23 does not work, and the cam 22 drives the lifting cylinder 24 to rotate through the magnetorheological fluid 242, and the lifting cylinder 24 drives the drilling piece 27 to rotate, and the drilling piece 27 is brought into contact with the position where the tooth needs to be drilled, so that the tooth can be drilled. The magnetorheological fluid 242 is a prior art, and the magnetorheological fluid 242 will be affected by the magnetic field and change its state. When the magnetorheological fluid 242 does not contact the magnetic field, the magnetorheological fluid 242 presents a Newtonian fluid state. When the magnetorheological fluid 242 contacts the magnetic field, the magnetorheological fluid 242 becomes a solid-like form under the action of the magnetic field, has a strong shear strength, and can transmit the torque between the lifting cylinder 24 and the cam 22.

[0057] After drilling the tooth, the control valve A and the first outlet are both opened, and the external air passes through the first channel 212, the control valve A, the pipeline, the air slip ring 28 and the extraction pump 13. The extraction pump 13 works in reverse to pressurize the incoming air, and the pressurized air enters the lifting cylinder 24, increasing the pressure in the lifting cylinder 24. At this time, the inlet of the extraction pump 13 is connected to the lifting cylinder 24 through a pipeline, and the first control valve in the pipeline connecting the inlet of the extraction pump 13 and the lifting cylinder 24 is opened, and the pressurized air directly acts on the upper side of the needle 25, and the needle 25 in the lifting cylinder 24 moves the compression spring downward, causing the needle 2 5 moves to the bottom of the cutting wheel 23. At this time, the needle 25 is inserted into the position of the previous drilling so that one end of the needle 25 contacts the dental pulp. The extraction pump 13 works in the forward direction. The first control valve in the connecting pipe between the extraction pump 13 and the needle 25 is opened. The inlet of the extraction pump 13 is connected with the needle 25 through a pipe, and the pipe connecting the inlet pipe of the extraction pump 13 and the needle 25 is a hose. The extraction pump 13 extracts the dental pulp through the needle 25. The extracted dental pulp enters the storage chamber 14 through the pipe, the air slip ring 28, the control valve A and the first channel 212. The first outlet is opened to take out the dental pulp.

[0058] After the pulp extraction, the extraction device is extracted from the inside of the tooth, so that the needle 25 is in contact with the external air, and the extraction pump 13 continues to extract air. The air drives the extraction pump 13, the pipeline, the first channel 212 and the pulp remaining in the air sliding ring 28 to move into the storage chamber 14, and finally the first outlet is opened to take it out. After that, the filling pump fills the cleaning liquid and sprays it from the liquid spraying pipe 12. The sprayed cleaning liquid is extracted by the needle 25 through the extraction pump 13, and then enters the extraction pump 13, the pipeline, the first channel 212 and the air sliding ring 28, and is cleaned again. The remaining pulp is then taken out from the first outlet. Through the above design, the extraction pump 13, the pipeline, the first channel 212 and the air sliding ring 28 in the extraction device are ensured to be clean by cleaning with air and cleaning liquid, and self-cleaning is achieved, which is convenient for the next pulp extraction and will not have an adverse effect on the next pulp extraction.

[0059] During the rotation of the cam 22, since the sliding plate 26 and the cam 22 are rotatably connected via a bearing, and the sliding plate 26 is slidably installed on the housing 11 via the guide shaft A, the upper and lower positions of the cam 22 can still be adjusted by the spring B221 during the rotation of the cam 22, thereby realizing the switching of the cutting and punching functions without the need for a stop device, and the structural design is ingenious.

[0060] Press the stop button on the control panel 1 to power off the extraction device.

[0061] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0062] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dental pulp extraction device for obtaining clean dental pulp stem cells, characterized in that: The invention comprises a housing (11), wherein a driving motor (2) is vertically mounted in the housing (11), a cam (22) is mounted on the output shaft of the driving motor (2), a spring B (221) is mounted above the cam (22), a reciprocating plate (21) is mounted below the cam (22), a lifting cylinder (24) is mounted inside the reciprocating plate (21), a coil (241) and a magnetorheological fluid (242) are mounted between the reciprocating plate (21) and the lifting cylinder (24), and a cutting wheel (241) is mounted below the reciprocating plate (21). 3), a needle (25) is installed in the lifting cylinder (24), a drilling plate (27) is installed on the lower side of the lifting cylinder (24), the cam (22) drives the cutting wheel (23) to vibrate at a high speed, the cutting wheel (23) cuts the teeth, and the drilling plate (27) drills holes in the teeth, the spring B (221) controls the state of the cam (22), the coil (241) controls the state of the magnetorheological fluid (242), and the magnetorheological fluid (242) realizes power control between the cam (22) and the lifting cylinder (24); A sliding plate (26) is rotatably mounted on the upper side of the cam (22) via a bearing, a plurality of guide shafts A are mounted on the sliding plate (26), and the plurality of guide shafts A are slidably mounted on the housing (11), the spring B (221) is sleeved on the guide shaft A, one end of the spring B (221) is mounted on the cam (22), and the other end of the spring B (221) is mounted on the housing (11), a sleeve structure is provided on the lower side of the cam (22), the inner wall of the sleeve structure is rotatably sealedly connected to the outer side of the lifting cylinder (24), the sleeve structure and the outer side of the lifting cylinder (24) form a first chamber, the coil (241) is sleeved on the lifting cylinder (24) and arranged in the first chamber, the magnetorheological fluid (242) is arranged in the first chamber and contacts the coil (241), a protrusion structure is provided on the outer side of the cam (22), and a groove structure is provided on the outer side of the reciprocating plate (21), and the protrusion structure and the groove structure are arranged in a matching manner; The reciprocating plate (21) is provided with a guide shaft B, the reciprocating plate (21) is slidably mounted on the housing (11) via the guide shaft B, a spring A (211) is sleeved on the guide shaft B, one end of the spring A (211) is mounted on the reciprocating plate (21), and the other end of the spring A (211) is mounted on the housing (11); Both ends of the spring A (211) are connected to the control system, both ends of the spring B (221) are electrically connected to the control system, both ends of the coil (241) are electrically connected to the control system, a toothed structure is arranged on the outside of the cutting wheel (23), the inside of the needle (25) is a hollow structure, a needle head is arranged at the lower end of the needle (25), and the needle head is connected to the inside of the needle (25); The longitudinal section of the lifting cylinder (24) is "V"-shaped. An extraction pump (13) is installed in the lifting cylinder (24). The extraction pump (13) is installed in the middle of the lifting cylinder (24) and is arranged above the needle (25). The extraction pump (13) is electrically connected to the control system. The inlet of the extraction pump (13) is connected to the needle (25) and the inside of the lifting cylinder (24) through a pipeline. The needle (25) is slidably installed on the lifting cylinder (24) through a spring. The needle (25) is slidably and sealedly connected to the lifting cylinder (24). A first control valve is installed in the pipeline connected to the inlet of the extraction pump (13). The first control valve is electrically connected to the control system. A storage chamber (14) is arranged on the upper side of the housing (11), and the storage chamber (14) is arranged on the lower side of the drive motor (2). A first channel (212) is arranged in the output shaft of the drive motor (2). An air slip ring (28) is installed above the extraction pump (13), and the air slip ring (28) is installed on the lifting cylinder (24). The outlet of the extraction pump (13) is connected to the air slip ring (28) through a pipeline, and the air slip ring (28) is connected to the lower side of the first channel (212) through a pipeline. The upper side of the first channel (212) is connected to the storage chamber (14). A control valve A is installed in the first channel (212), and the control valve A is electrically connected to a control system. A first outlet is arranged on the housing (11) facing the storage chamber (14).

2. A dental pulp extraction device for obtaining clean dental pulp stem cells according to claim 1, comprising a water injection pump, characterized in that: A control panel (1) is mounted on the housing (11), a control system is arranged inside the control panel (1), a start button, a stop button and an emergency stop button are arranged on the control panel (1), a liquid spraying pipe (12) is arranged on the housing (11), the water injection pump is connected to the liquid spraying pipe (12) via a pipeline, the water injection pump is mounted on the housing (11), and a structure that is convenient for a person to hold is arranged on the housing (11).

3. A method for obtaining clean dental pulp stem cells, characterized in that: A dental pulp extraction device for obtaining clean dental pulp stem cells according to any one of claims 1 to 2, comprising the following method for obtaining dental pulp stem cells: S1, removing hard tissue on the tooth surface by a cutting wheel (23); S2, drilling the tooth using a drilling sheet (27); S3, inserting the needle (25) into the drilling position and contacting it with the pulp; S4, the extraction pump (13) extracts the dental pulp into the storage chamber (14); S5. Open the first outlet on the storage chamber (14) and take out the dental pulp.

4. A method for obtaining clean dental pulp stem cells according to claim 3, characterized in that: The step S1 also includes the following specific steps: S101, the cam (22) drives the cutting wheel (23) to vibrate back and forth at high speed to remove hard tissue on the tooth surface; S102, the control system determines the state of the cam (22) by detecting the current in the spring B; S103, the filling pump sprays the cleaning liquid through the liquid spray pipe (12).

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