Portable root canal cleaning device and using method thereof

Abstract

The invention discloses a portable root canal cleaning device and a use method thereof. The portable root canal cleaning device comprises a first tube, a first piston movably arranged in the first tube, a first needle connected to the bottom of the first tube, a second tube, a second piston movably arranged in the second tube and a second needle connected to the bottom of the second tube. The device further comprises a pulling rope, one end of the pulling rope is connected to the first piston, the other end of the pulling rope is connected to the second piston, the pulling rope movably penetrates through a middle guide piece, and the middle guide piece is located above the upper limit of the stroke of the first piston and the upper limit of the stroke of the second piston. The first piston and the second piston can be linked through the traction rope, so that an additional positive pressure or negative pressure device is not needed to drive flushing fluid to flow in the flushing and swinging washing process, the cost of equipment is effectively reduced, and the equipment is more convenient to carry, transport, replace and maintain.

Description

Technical Field

[0001] The present invention relates to the technical field of endodontic treatment in stomatology, and particularly relates to a portable root canal cleaning device that does not require the configuration of a positive pressure or negative pressure device. Background Art

[0002] Traditional clinical root canal irrigation mainly uses solid irrigation tips to irrigate the root canal. However, since the water flow is from the outside to the inside, it is difficult to displace the infectious substances and debris (including the smear layer) in the apical area. Therefore, it is necessary to use an irrigation needle to penetrate deep into the apical area for irrigation, so that the infectious substances and debris in the apical area flow from the inside to the outside. Through repeated irrigation and flushing, the remaining infectious substances and debris in the apical area after irrigation are displaced. The operation steps are cumbersome and the efficiency of root canal irrigation is low.

[0003] In previous work, the inventor proposed a hollow irrigation tip in patent CN216603115U, which can infuse the irrigation fluid into the apical area, making the irrigation fluid flow from the inside to the outside in the apical area. At the same time, ultrasonic oscillation is carried out, so that the smear layer and debris on the root canal wall are discharged from above the root canal along with the water flow, thereby combining the irrigation step and the flushing step into one, improving the efficiency of root canal treatment. However, when this hollow irrigation tip infuses the irrigation fluid into the apical area, positive pressure needs to be applied, and the positive-pressure irrigation fluid has the risk of flushing out of the apical foramen, which will carry the infectious substances in the root canal into the periapical tissue. Moreover, once some irritating irrigation fluids exceed the apical foramen, they will cause damage to the surrounding apical tissues, and even lead to facial swelling and tissue necrosis.

[0004] To solve the above problems, in patent CN118490390A, the inventor changed the flow mode of the irrigation fluid. The irrigation fluid is infused into the root canal from the top of the root canal by positive pressure, and then the used irrigation fluid is aspirated from the bottom of the apical area by using an irrigation tip under negative pressure, so that the apical area will not be directly impacted by the positive-pressure irrigation fluid. This flow mode of the irrigation fluid is more reliable and safe. However, this device needs to be additionally connected with a positive pressure device for filling the irrigation fluid, and also needs to be connected with a negative pressure device to pump out the used irrigation fluid from the apical area. The cost of the device is higher, and it is necessary to switch between the positive pressure and negative pressure devices multiple times during operation, which is not conducive to doctors focusing on root canal irrigation and flushing. Summary of the Invention

[0005] An object of the present invention is to provide a portable root canal cleaning device, which realizes positive-pressure output of the irrigation fluid and negative-pressure suction of the used irrigation fluid during the cleaning process by setting a traction rope to link a first piston and a second piston, without the need to externally connect a positive pressure or negative pressure device. The device has a lower cost, is convenient for carrying, transporting, replacing and maintaining. Moreover, during the cleaning process, the traction rope linkage structure can further simplify the operation, without the need to repeatedly switch between positive pressure and negative pressure devices, ensuring that doctors can focus more on root canal treatment.

[0006] The present invention is realized through the following technical solutions:

[0007] A portable root canal cleaning device includes a first tube, a first piston movably disposed within the first tube, a first needle connected to the bottom of the first tube, a second tube, a second piston movably disposed within the second tube, and a second needle connected to the bottom of the second tube; it further includes a traction rope, one end of the traction rope is connected to the first piston, the other end of the traction rope is connected to the second piston, and the traction rope movably passes through an intermediate guide member, and the intermediate guide member is located above the upper limit of the stroke of the first piston and the upper limit of the stroke of the second piston.

[0008] In this technical solution, the device includes a first tube and a second tube. Among them, the first piston disposed within the first tube can move along the first tube, and a positive pressure is formed within the first tube, thereby pushing the flushing liquid within the first tube out through the first needle and infusing the flushing liquid into the root canal from the top of the root canal; similarly, the second piston disposed within the second tube can move along the second tube, and a negative pressure is formed within the second tube, sucking the flushing liquid in the apical region into the second tube through the second needle. In some embodiments, the structures of the first tube and the second tube are similar to the syringe barrel structures in the prior art.

[0009] In this technical solution, the pistons of the first and second tubes are linked by a traction rope. Specifically, one end of the traction rope is connected to the first piston, and the other end is connected to the second piston. In some embodiments, the traction rope is directly connected to the piston. In some preferred embodiments, the traction rope is indirectly connected to the piston to make the linkage structure have better stability and reliability. For example, the end of the traction rope can be connected to the push rod, or a linkage sleeve can be sleeved outside the push rod, and the traction rope is hooked on the short axis of the linkage sleeve. In some embodiments, the connection between the traction rope and the piston can be a fixed connection, that is, the end of the traction rope is fixed on the piston. In some embodiments, the traction rope can also movably pass through the piston or other components on the piston, and fix the end of the traction rope, for example, at the top of the first tube or the second tube, that is, taking the connection point between the traction rope and the piston as the midpoint of the traction rope instead of the end point.

[0010] In this technical solution, there is also a fulcrum between the two ends of the traction rope. Specifically, the fulcrum is an intermediate guide member installed between the first tube and the second tube. For example, in some embodiments, the intermediate guide member can be installed on the connecting member. At the same time, the intermediate guide member needs to be located above the upper limits of the strokes of the first piston and the second piston. Taking the first piston as an example, when it moves along the first tube, the upper limit of the stroke of the first piston is usually located at the position of the first tube near the liquid inlet, and the lower limit of its stroke is usually located at the position of the first tube near the needle tip. After adding the flushing liquid into the first tube, the first piston is pushed from its upper limit of the stroke to its lower limit of the stroke, so as to push out the flushing liquid in the first tube. In this technical solution, the intermediate guide member is arranged above the upper limits of the strokes of the two pistons. For example, it can be arranged near the top ends of the first tube and the second tube and the liquid inlet. Thus, when the second piston is at the lower limit of the stroke, during the process that the second piston can push the first piston from its upper limit of the stroke to its lower limit of the stroke by using the tensioned traction rope, the second piston is pulled from its lower limit of the stroke to its upper limit of the stroke, so as to realize negative pressure liquid suction in the second tube while positive pressure liquid pushing in the first tube.

[0011] During operation, the first needle is located at the top end of the root canal, the second needle is located in the apical area at the bottom of the root canal, the first piston is at the upper limit of the stroke, and the second piston is at the lower limit of the stroke; the first piston is pushed from the upper limit of the stroke to the lower limit of the stroke, the flushing liquid in the first tube is pushed out through the first needle and infused into the root canal from the top of the root canal, the flushing liquid enters the root canal to wash the inner wall of the root canal, and then enters the apical area at the bottom of the root canal; the tip of the second needle moves in the apical area, uses the flushing liquid accumulated in the apical area to wash the apical area, and during the process that the first piston moves downward, the second piston is affected by the traction rope and moves from its lower limit of the stroke to its upper limit of the stroke, negative pressure is formed in the second tube, and the washed flushing liquid in the apical area is sucked from the second needle into the second tube, so as to complete the "inward and outward" flow of the flushing liquid without relying on external positive pressure and negative pressure devices, and wash and rinse the root canal.

[0012] Moreover, before cleaning, taking advantage of the non-linkage of the first piston and the second piston, for example, when the towing rope is always in a slack state, a flushing liquid can be loaded into the second tube to pre-clean the apical region. Specifically, usually, the upper and middle sections of the root canal have a relatively large number of debris, impurities, and infectious substances with relatively large volumes. Therefore, the first piston and the second piston can be first moved to their respective upper limits of travel. The second needle is aligned with the upper and middle sections of the root canal. Then, the second piston moves from the upper limit of travel to the lower limit of travel, and the flushing liquid in the second tube is flushed out through the second needle to clean the upper and middle sections of the root canal. After most of the debris and impurities in the upper and middle sections of the root canal are removed, the second piston has moved to the lower limit of travel. Then, a flushing liquid is loaded into the first tube, and the first needle is placed at the top of the root canal and the second needle penetrates into the apical region to perform subsequent flushing and irrigation operations. During the entire pre-cleaning process, the first piston is at its upper limit of travel, and the towing rope is in a slack state. Therefore, the movement of the second piston will not be linked to the first piston.

[0013] With the above settings, the first piston and the second piston can be linked through the towing rope, so that no additional positive pressure or negative pressure device is required to drive the flow of the flushing liquid during the flushing and irrigation processes, effectively reducing the cost of the device and making the carrying, transportation, replacement, and maintenance of the device more convenient. Moreover, when cleaning the root canal, only the first needle needs to be placed at the top of the root canal and the second needle penetrates into the apical region, and the first piston is pushed to inject the flushing liquid, without repeatedly switching the positive pressure and negative pressure devices, ensuring that the doctor can focus more on root canal treatment. Moreover, by adjusting the first piston and the second piston to be both at their respective upper limits of travel, the linkage effect of the towing rope can be invalidated, thereby allowing the second piston to be used alone to spray the flushing liquid into the upper and middle sections of the root canal for pre-cleaning of the root canal, better removing the pollutants in the upper and middle sections of the root canal, and effectively improving the root canal cleaning efficiency.

[0014] Further, a first push rod is provided on the first piston, and a second push rod is provided on the second piston. A linkage sleeve is sleeved on the outer walls of the first push rod and the second push rod. The linkage sleeve can move synchronously with the corresponding first push rod and second push rod. A short shaft for connecting the towing rope is provided on the linkage sleeve.

[0015] In this technical solution, linkage sleeves are provided on the outer walls of the first and second push rods. In some embodiments, the linkage sleeve can be fixedly connected to the push rod, such as by clamping, threaded connection, etc., or can be rotatably connected. For example, an annular groove extending along the circumferential direction of the linkage sleeve is provided on the inner wall of the linkage sleeve, and an annular protrusion matching the annular groove is provided on the outer wall of the push rod to allow the push rod to rotate relative to the linkage sleeve and also move synchronously with the linkage sleeve.

[0016] In this technical solution, the short shaft provided on the linkage sleeve is used to connect the traction rope. Similarly, the connection between the short shaft and the traction rope can be a fixed connection, or the traction rope can pass through the short shaft to achieve the traction connection to the short shaft. In some preferred embodiments, two short shafts are provided on the linkage sleeve, and the two short shafts are symmetrically distributed. At the same time, there are two traction lines, and each traction line passes through or is connected to a short shaft on the linkage sleeve, so that the forces on the push rod and the piston are more uniform, and the traction process is more stable and reliable.

[0017] As a preferred embodiment of the present invention, a first push rod is provided on the first piston, and a second push rod is provided on the second piston. A linkage sleeve is sleeved on the outer walls of the first push rod and the second push rod. A short shaft for connecting the traction rope is provided on the linkage sleeve; the bottom end of the linkage sleeve is connected with a liquid inlet plate, and the liquid inlet plate includes a cavity for placing the first piston or the second piston. First through holes are provided on the first piston and the second piston, and second through holes are provided on the liquid inlet plate; the first piston and the second piston can be rotated to the liquid inlet state and the flushing state. In the liquid inlet state, the first through hole is communicated with the second through hole, and the liquid above the liquid inlet plate can flow to the lower part of the liquid inlet plate through the first through hole and the second through hole; in the flushing state, the first through hole is not communicated with the second through hole.

[0018] In this technical solution, the linkage sleeve is sleeved on the outer wall of the push rod. The short shaft provided on the linkage sleeve is used to connect the traction rope. The bottom end of the linkage sleeve is fixed with a liquid inlet plate, and the liquid inlet plate is of a hollow structure. The cavity inside it is used to accommodate the piston, that is, the liquid inlet plate is sleeved outside the first and second pistons. When the push rod is rotated, the push rod drives the piston to rotate together. At the same time, the linkage sleeve is restricted by the traction rope and cannot rotate, and the liquid inlet plate fixedly connected to the linkage sleeve also does not rotate, so that the piston is allowed to rotate relative to the liquid inlet plate.

[0019] By using the rotation of the piston relative to the liquid inlet plate, the piston can be rotated to the liquid inlet state and the flushing state according to requirements. Among them, in the liquid inlet state, the first through hole of the piston is communicated with the second through hole on the liquid inlet plate, so that the flushing liquid poured above the liquid inlet plate can enter the space below the liquid inlet plate through the second through hole above the cavity, the first through hole, and the second through hole below the cavity for storage. In the flushing state, the piston rotates until its first through hole is not communicated with the second through hole on the liquid inlet plate, so as to ensure that when the piston presses the flushing liquid below it, there is enough pressure below the piston to press the flushing liquid out of the needle.

[0020] By providing the liquid inlet plate and the piston that can rotate relative to the liquid inlet plate, it is not necessary to completely withdraw the piston from the syringe before liquid inlet, nor is it necessary to adjust the traction rope after each liquid inlet. The addition of the flushing liquid is simpler and more convenient, and the operation of the root canal cleaning process device is also more reliable.

[0021] Furthermore, a spring sheet located in the cavity is arranged on the inner wall of the liquid inlet plate, and a plurality of toggle grooves are evenly arranged on the outer walls of the first piston and the second piston, and the toggle grooves are used to toggle the spring sheet when passing through the spring sheet.

[0022] In the present technical solution, toggle grooves are evenly arranged on the outer wall of the piston. When the piston is rotated until the toggle groove moves to the position of the shrapnel, the shrapnel enters the toggle groove. When the piston continues to be rotated until the toggle groove passes the shrapnel, the side wall of the toggle groove pushes the shrapnel to produce a certain deformation. The deformed shrapnel shrinks in the area between the outer wall of the piston and the inner wall of the liquid inlet plate until the shrapnel enters the next toggle groove. When the toggle groove passes the shrapnel, the deformation produced by the shrapnel will produce a certain resistance to the rotation of the piston, and the resistance will be eliminated after the shrapnel enters the next toggle groove, thereby reminding the doctor that the piston has rotated a certain angle. In some embodiments, by selecting a suitable material, a certain sound can be made when the shrapnel is deformed, thereby playing a better prompting role.

[0023] In this technical solution, by providing a spring sheet and a toggle slot, the doctor can be informed of the current state of the piston, making it easier for the doctor to select the desired liquid inlet state or flushing state, further simplifying the flushing and rinsing operations and improving the reliability of the cleaning device.

[0024] As another preferred embodiment of the present invention, a liquid baffle plate is provided in the second tube, and a third through hole is provided on the liquid baffle plate; an extension rod is connected to the bottom of the second piston, and the bottom end of the extension rod passes through the bottom of the liquid inlet plate and is connected to a sealing member, and the sealing member is used to block the third through hole when the second piston is in a liquid inlet state.

[0025] In the technical solution, the liquid baffle divides the internal space of the second tube into an upper cavity and a lower cavity, and the second piston moves in the upper cavity. In some embodiments, the height of the liquid baffle in the second tube can be determined according to the required stroke of the second piston. In one or more embodiments, in order to ensure that the second piston has a sufficient stroke, the length of the second tube can also be set to be greater than the length of the first tube. The third through hole provided on the liquid baffle connects the upper cavity and the lower cavity, and the liquid in the upper cavity can flow through the third through hole to the lower cavity for storage.

[0026] In this technical solution, an extension rod is further connected to the bottom of the second piston. The extension rod can rotate together with the second piston, and then drive the sealing member connected to its bottom to rotate together, thereby realizing the sealing or opening of the third through hole. Specifically, during pre-cleaning, both the first piston and the second piston are at or near the upper limit of the stroke, the towing rope is in a slack state, and the movement of the second piston is not linked to the first piston. At this time, the second piston is in the liquid inlet state, the sealing member seals the third through hole, the upper cavity is closed, and all the flushing liquid that enters the lower part of the liquid inlet plate through the first through hole and the second through hole is located above the liquid baffle. After the liquid inlet is completed, move the second piston downward until the sealing member leaves the third through hole and can rotate freely, rotate the second piston to the flushing state, the sealing member rotates with the second piston, and pushes the flushing liquid in the lower cavity to spray out from the second needle head to wash the middle and upper sections of the root canal, completing the pre-cleaning. After pre-cleaning, during the flushing process of the first tube, the second piston is linked and moves upward from bottom to top until the sealing member abuts against the lower surface of the material baffle.

[0027] Different from the outflow of the flushing liquid from the first needle head, during pre-cleaning, the flushing liquid of the second needle head needs to wash the middle and upper sections of the root canal with a certain pressure, rather than just dripping on the root canal. Therefore, through the above structure of this technical solution, during the process of adding flushing liquid to the second tube in the pre-cleaning stage, most of the flushing liquid can be stored in the upper cavity, avoiding partial liquid flowing out through the second needle head during the liquid inlet process; at the same time, during pre-cleaning, after moving the second piston downward a small distance, immediately rotate the second piston, and then quickly push the second piston, which can make the speed of the flushing liquid sprayed out from the second needle head faster and the flushing pressure greater, achieving a better pre-cleaning effect.

[0028] Further, a first guiding member is provided on the first tube, and a second guiding member is provided on the second tube. One end of the towing rope is connected to the first guiding member, and the other end of the towing rope sequentially passes through the short shaft on the linkage sleeve corresponding to the first push rod, the middle guiding member, and the short shaft on the linkage sleeve corresponding to the second push rod, and is connected to the second guiding member.

[0029] In this technical solution, in order to further improve the stability of the first piston and the second piston during the towing process, both ends of the towing rope are respectively connected to the first guiding member and the second guiding member, and the towing rope passes through the short shaft of the first push rod, the middle guiding member, and the short shaft of the second push rod. In some embodiments, in order to further improve the stability, two independent towing ropes are provided, and each towing rope is sequentially connected to the first guiding member, the short shaft, the middle guiding member, the short shaft, and the second guiding member.

[0030] Further, the length of the first needle head is less than the length of the second needle head, and the diameter of the first needle head is greater than the diameter of the second needle head.

[0031] In this technical solution, in the working state, the first needle needs to be located above the root canal to inject the flushing liquid from the top of the root canal, and the second needle needs to go deep into the apical area to suction and wash the apical area, so the length of the first needle is shorter and the length of the second needle is longer. Similarly, the second needle needs to go deep into the narrow apical area, so its diameter is smaller than that of the first needle. At the same time, the thinner second needle is also conducive to increasing the flow rate of the flushing liquid sprayed in the pre-cleaning stage, achieving a better flushing effect.

[0032] Furthermore, the second needle includes an upper needle section and a lower needle section, the upper needle section is connected to the bottom of the second tube, a rubber connector is connected between the upper needle section and the lower needle section, and a vibrator for ultrasonically vibrating the lower needle section is provided on the outer wall of the lower needle section.

[0033] In this technical solution, the second needle includes two sections, the upper section of the needle is fixedly connected to the bottom of the second tube, and the bottom end of the second needle is connected to the lower section of the needle through a rubber connecting piece. At the same time, a vibrator is also provided on the outer wall of the lower section of the needle to generate high-frequency vibration during operation to improve the washing effect of the apical area.

[0034] In the present technical solution, the vibrator can drive the lower section of the needle to vibrate at a high frequency, and through the rubber connector, the vibration effect of the high-frequency vibration on the upper section of the needle, and the second tube, the second piston and other components connected to the upper section of the needle will be greatly reduced, which not only avoids interference with the doctor's operation, but also reduces the influence of other components on the vibration reduction of the lower section of the needle; at the same time, during the high-frequency vibration process, the deformation of the rubber connector can better ensure the high-frequency vibration of the lower section of the needle, and the amplitude of the lower section of the needle will not be too large in the narrow space of the apical area, thereby effectively improving the washing effect of the lower section of the needle.

[0035] Another object of the present invention is to provide a method for using any of the aforementioned portable root canal cleaning devices, the method comprising the following steps:

[0036] S1: the first piston is located at its upper limit of travel, and the second piston is located at its lower limit of travel;

[0037] S2: The flushing liquid is loaded into the first tube;

[0038] S3: The first piston moves toward the lower limit of its stroke, pushing the flushing fluid into the top of the root canal through the first needle. During the movement of the first piston, the traction rope drags the second piston toward the upper limit of its stroke, and the flushing fluid in the apical area is drawn into the second tube through the second needle.

[0039] In this technical solution, through the linkage of the traction rope, during the process of positive pressure flushing with the first needle, negative pressure aspiration is performed with the second needle. In some embodiments, the second needle can vibrate at a high frequency under the action of the vibrating piece to better wash the apical region during the aspiration process.

[0040] In this technical solution, when the first piston moves to the lower limit of its stroke, the second piston is at the upper limit of its stroke. In order to discharge the used flushing liquid in the second piston without causing linkage to the first piston, the first piston can be first moved to the upper limit of its stroke. After the traction rope is slack, the second piston is pushed downward to discharge the flushing liquid after flushing. After discharging, the first piston is again at the upper limit of its stroke, while the second piston is at the lower limit of its stroke. At this time, flushing liquid is added to the first tube again, and the root canal can be flushed and washed continuously.

[0041] Furthermore, it also includes a pre-cleaning step, where the pre-cleaning includes the following steps:

[0042] S0: Both the first piston and the second piston are at the upper limits of their strokes. The flushing liquid is filled into the second tube. The second piston moves towards the lower limit of its stroke, pushing the flushing liquid through the second needle into the apical region until the second piston moves to the lower limit of its stroke.

[0043] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0044] 1. The present invention can link the first piston and the second piston through the traction rope, so that no additional positive pressure or negative pressure device is required to drive the flow of the flushing liquid during the flushing and washing processes, effectively reducing the cost of the equipment and making the carrying, transportation, replacement, and maintenance of the equipment more convenient. Moreover, when cleaning the root canal, only the first needle needs to be placed at the top of the root canal and the second needle needs to penetrate into the apical region, and pushing the first piston to inject the flushing liquid is sufficient, without the need to repeatedly switch the positive pressure and negative pressure devices, ensuring that the doctor can focus more on the root canal treatment.

[0045] 2. The present invention can also make the linkage effect of the traction rope ineffective by adjusting both the first piston and the second piston to the upper limits of their respective strokes, and then allow the second piston to be used alone to spray the flushing liquid into the middle and upper segments of the root canal for pre-cleaning of the root canal, better removing the pollutants in the middle and upper segments of the root canal and effectively improving the root canal cleaning efficiency.

[0046] 3. The present invention is provided with a liquid inlet plate and a piston that can rotate relative to the liquid inlet plate. There is no need to completely withdraw the piston from the syringe before injecting the liquid, nor is it necessary to adjust the traction rope after each injection. The addition of the flushing liquid is simpler and more convenient, and the operation of the device during the root canal flushing and washing processes is also more reliable.

[0047] 4. The present invention provides a baffle plate so that during the pre-cleaning stage, when the flushing liquid is added to the second tube, most of the flushing liquid can be stored in the upper cavity, thereby preventing part of the liquid from flowing out through the second needle during the liquid inlet process; at the same time, during pre-cleaning, the second piston is immediately rotated after a small section of the second piston is moved down, and then the second piston is quickly pushed, so that the flushing liquid sprayed from the second needle can be faster and the flushing pressure can be greater, thereby achieving a better pre-cleaning effect;

[0048] 5. The present invention provides a rubber connector to connect the two sections of the second needle, which not only avoids interference with the doctor's operation, but also reduces the influence of other components on the vibration reduction of the lower section of the needle. In addition, during the high-frequency vibration process, the deformation of the rubber connector can better ensure the high-frequency vibration of the lower section of the needle. The amplitude of the lower section of the needle will not be too large in the narrow space of the apical area, but its high frequency can effectively improve the washing effect of the lower section of the needle.

[0049] 6. The present invention can remind the doctor of the current state of the piston by providing a spring piece and a toggle groove, so as to facilitate the doctor to select the required liquid inlet state or flushing state, further simplify the flushing and rinsing operations, and improve the reliability of the cleaning device. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0051] Figure 1 It is a structural schematic diagram of a specific embodiment of the present invention;

[0052] Figure 2 It is a schematic top view of a cleaning device in a specific embodiment of the present invention;

[0053] Figure 3 It is a schematic diagram of the connection between the first push rod and the linkage sleeve in a specific embodiment of the present invention;

[0054] Figure 4 It is a structural schematic diagram of a specific embodiment of the present invention in which the first through hole of the first piston is connected to the second through hole of the liquid inlet plate;

[0055] Figure 5 It is a schematic diagram of a structure in which the first through hole and the second through hole are not connected in a specific embodiment of the present invention;

[0056] Figure 6 It is a cross-sectional schematic diagram of a first piston and a liquid inlet plate in a specific embodiment of the present invention;

[0057] Figure 7 It is a structural schematic diagram of a specific embodiment of the present invention in which the first push rod and the second push rod are respectively located in the upper half of the tube where they are located, and the liquid baffle in the second tube is closed;

[0058] Figure 8 It is a schematic diagram of the blocking member rotating to block the third through hole of the liquid baffle plate when the first through hole and the second through hole are connected in a specific embodiment of the present invention;

[0059] Figure 9 It is a schematic diagram of a specific embodiment of the present invention in which the blocking member rotates to the third through hole that does not block the liquid baffle plate when the first through hole and the second through hole are not connected;

[0060] Figure 10 It is a top view schematic diagram of the blocking member not blocking the third through hole in a specific embodiment of the present invention;

[0061] Figure 11 Schematic diagram of the structure of the second needle in a specific embodiment of the present invention.

[0062] Marks and corresponding parts names in the attached drawings:

[0063] 10-first tube, 11-first push rod, 111-groove, 12-first piston, 121-first through hole, 122-sliding groove, 13-first needle, 14-linked sleeve, 141-protrusion, 15-liquid inlet plate, 151-cavity, 152-second through hole, 153-spring, 154-torsion spring;

[0064] 20 - second tube, 21 - second push rod, 22 - second piston, 23 - second needle, 231 - upper needle section, 232 - lower needle section, 24 - liquid blocking plate, 25 - third through hole;

[0065] 30-traction rope, 31-first guide member, 32-middle guide member, 33-second guide member, 34-first short shaft, 35-second short shaft, 36-first pulling block, 37-second pulling block, 38-first magnet, 39-second magnet;

[0066] 4-connecting piece, 51-extension rod, 52-blocking piece, 6-rubber connecting piece, 7-vibrating piece. DETAILED DESCRIPTION

[0067] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0068] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the protection scope of the present invention.

[0069] Embodiment 1:

[0070] As Figure 1 And Figure 2 A portable root canal cleaning device shown, comprising a first tube 10, a first piston 12 movably disposed within the first tube 10, a first needle 13 connected to the bottom of the first tube 10, a second tube 20, a second piston 22 movably disposed within the second tube 20, a second needle 23 connected to the bottom of the second tube 20; further comprising a traction rope 30, one end of the traction rope 30 is connected to the first piston 12, the other end of the traction rope 30 is connected to the second piston 22, the traction rope 30 movably passes through an intermediate guide member 32, and the intermediate guide member 32 is located above the upper limit of the stroke of the first piston 12 and the upper limit of the stroke of the second piston 22.

[0071] In some embodiments, the structures of the first tube and the second tube are similar to the syringe barrel structure in the prior art. In one or more embodiments, a connecting member 4 is further provided between the first tube and the second tube to connect the first tube and the second tube for the doctor to hold conveniently.

[0072] In some embodiments, the connection between the traction rope and the piston can be a fixed connection, that is, the end of the traction rope is fixed on the piston. In some embodiments, the traction rope can also movably pass through the piston or other components on the piston, and the end of the traction rope is fixed to the top of the first tube or the second tube.

[0073] In some preferred embodiments, a first push rod 11 is provided on the first piston 12, a second push rod 21 is provided on the second piston 22, a linkage sleeve 14 is sleeved on the outer walls of the first push rod 11 and the second push rod 21, the linkage sleeve 14 can move synchronously with the corresponding first push rod 11 and second push rod 21, and a short shaft for connecting the traction rope 30 is provided on the linkage sleeve 14. In some preferred embodiments, as Figure 2 And Figure 3 Shown, two short shafts are provided on the linkage sleeve, and the two short shafts are symmetrically distributed. At the same time, there are two traction lines, and each traction line passes through or is connected to a short shaft on the linkage sleeve, so that the force on the push rod and the piston is more uniform, and the traction process is more stable and reliable.

[0074] In some preferred embodiments, a first guide member 31 is provided on the first tube 10, and a second guide member 33 is provided on the second tube 20. One end of the traction rope 30 is connected to the first guide member 31, and the other end of the traction rope 30 sequentially passes through the short shaft on the linkage sleeve 14 corresponding to the first push rod 11, the intermediate guide member 32, and the short shaft on the linkage sleeve 14 corresponding to the second push rod 21, and is connected to the second guide member 33.

[0075] In some embodiments, the length of the traction rope between the first and second guide members is not adjustable, that is, both ends of the traction rope are fixed to the first and second guide members. In one or more embodiments, the total length of the traction rope between the two guide members is adjustable. Both ends of the traction rope pass through the first and second guide members respectively and are fixed to the first and second pulling blocks. By moving the pulling blocks, the length of the traction rope between the first and second guide members can be adjusted, which is beneficial to maintaining both pistons at their respective stroke upper limits before the pre-cleaning stage. In one or more embodiments, as Figure 7 shown, first and second magnets are further provided on the outer walls of the first tube and the second tube to fix the first and second pulling blocks by magnetic attraction.

[0076] In some embodiments, the length of the first needle 13 is less than the length of the second needle 23, and the diameter of the first needle 13 is greater than the diameter of the second needle 23. In some embodiments, the length of the first needle is 5-16 mm, and the length of the second needle is 21-31 mm. In some embodiments, the diameter of the first needle is 0.4-0.5 mm, and the diameter of the second needle is 0.25-0.4 mm.

[0077] In some embodiments, an ultrasonic vibration member 7, such as a piezoelectric vibration piece, is further provided on the second needle, so that the second needle can wash the apical region by ultrasonic vibration during the negative pressure suction process, further improving the cleaning effect. In one or more embodiments, the vibration generating device for driving the vibration member to vibrate can be installed on the first tube, the second tube or the intermediate member, or can be provided in the second push rod; in one or more embodiments, the vibration generating device can also be used as an additional accessory and is not connected to the cleaning device, thereby reducing the total mass of the flushing and cleaning device.

[0078] Example 2:

[0079] Based on Example 1, as Figure 4 and Figure 5As shown, a first push rod 11 is provided on the first piston 12, and a second push rod 21 is provided on the second piston 22. A linkage sleeve 14 is sleeved on the outer walls of the first push rod 11 and the second push rod 21, and a short shaft for connecting the traction rope 30 is provided on the linkage sleeve 14; a liquid inlet plate 15 is connected to the bottom end of the linkage sleeve 14, and the liquid inlet plate 15 includes a cavity 151 for placing the first piston 12 or the second piston 22, and a first through hole 121 is provided on the first piston 12 and the second piston 22, and a second through hole 152 is provided on the liquid inlet plate 15; the first piston 12 and the second piston 22 can be rotated to a liquid inlet state and a flushing state. In the liquid inlet state, the first through hole 121 is connected with the second through hole 152, and the liquid above the liquid inlet plate 15 can flow to the bottom of the liquid inlet plate 15 through the first through hole 121 and the second through hole 152; in the flushing state, the first through hole 121 is not connected with the second through hole 152.

[0080] Take the first tube as an example. Figure 4 and Figure 5 As shown, when in use, the first piston is first rotated to the liquid-intake state, and the flushing liquid is added into the first tube. The flushing liquid enters the space below the first piston in the first tube through the second through hole and the first through hole for storage. After the flushing liquid is added, the first piston is rotated to the flushing state, the first and second through holes are not connected, the first push rod is pushed downward, and the flushing liquid stored under the first piston is flushed out through the first needle and flows from the top of the root canal to the apex area.

[0081] In one or more embodiments, in order to reduce the amount of flushing liquid stored in the first tube flowing directly through the first needle during the liquid injection process, an additional needle cover may be provided to block the first needle during the liquid injection process. In some embodiments, the needle cover may not be provided, because the amount of flushing liquid flowing out through the needle during the liquid injection process is small due to the influence of the air pressure inside and outside the needle and the size of the needle, and even if it flows out, it is poured into the top of the root canal.

[0082] In some preferred embodiments, Figures 4 to 6 As shown, a spring piece 153 located in the cavity 151 is arranged on the inner wall of the liquid inlet plate 151, and a plurality of toggle grooves 122 are evenly arranged on the outer walls of the first piston 12 and the second piston 22. The toggle grooves 122 are used to toggle the spring piece 153 when passing through the spring piece 153.

[0083] In one or more embodiments, a torsion spring 154 is provided at the hinge between the spring piece 153 and the inner wall of the liquid inlet plate 151 .

[0084] In some preferred embodiments, by reasonably setting the positions of the first through hole and the toggle slot, each time a resistance and / or sound prompt is generated, it can indicate that the piston has entered the liquid filling state or the flushing state. In one or more embodiments, in two adjacent toggle slots, one toggle slot corresponds to one first through hole, that is, when the spring piece enters one toggle slot, the first through hole is connected to the second through hole, and when the spring piece enters the previous or next adjacent toggle slot of the toggle slot, the first through hole is not connected to the second through hole. In some preferred embodiments, as Figure 6 As shown, the included angle between two adjacent first through holes is twice the included angle between two adjacent toggle grooves.

[0085] Embodiment 3:

[0086] Based on the above embodiments, Figures 7 to 9 As shown, a liquid baffle plate 24 is provided in the second tube 20, and a third through hole 25 is provided on the liquid baffle plate 24; an extension rod 51 is connected to the bottom of the second piston 22, and the bottom end of the extension rod 51 passes through the bottom of the liquid inlet plate 15 and is connected to a blocking member 52, and the blocking member 52 is used to block the third through hole 25 when the second piston 22 is in a liquid inlet state.

[0087] Unlike the outflow of the flushing liquid from the first needle, the flushing liquid from the second needle needs to flush the middle and upper sections of the root canal at a certain pressure during pre-cleaning, rather than just dripping on the root canal. Therefore, the structure of this embodiment allows most of the flushing liquid to be stored in the upper cavity during the pre-cleaning stage, thereby preventing some of the liquid from flowing out through the second needle during the liquid filling process; at the same time, during pre-cleaning, the second piston is rotated immediately after a small section of the second piston is moved down, and then the second piston is quickly pushed, so that the flushing liquid sprayed from the second needle can be faster and the flushing pressure can be greater, thereby achieving a better pre-cleaning effect.

[0088] In one or more embodiments, Figures 8 to 10 As shown, the shape of the blocking member and the third through hole can be a long strip, so that the blocking member cannot block the third through hole after rotating a certain angle and switching the state. Therefore, during the suction process, the space in the upper cavity can be used to form a negative pressure to better draw the used irrigation fluid away from the apical area.

[0089] Embodiment 4:

[0090] Based on the above embodiments, Figure 11 As shown, the second needle 23 includes an upper needle section 231 and a lower needle section 232, the upper needle section 231 is connected to the bottom of the second tube 20, a rubber connector 6 is connected between the upper needle section 231 and the lower needle section 232, and a vibrator 7 for ultrasonically vibrating the lower needle section 232 is provided on the outer wall of the lower needle section 232.

[0091] In some preferred embodiments, the vibrating member may employ a micro piezoelectric vibrating piece.

[0092] Embodiment 5:

[0093] A method of using a portable root canal irrigation device, using a portable root canal irrigation device according to any one of claims 1 to 8, the method comprising the following steps:

[0094] S1: The first piston 12 is at the upper limit of its stroke, and the second piston 22 is at the lower limit of its stroke;

[0095] S2: The flushing liquid is filled into the first tube 10;

[0096] S3: The first piston 12 moves towards the lower limit of its stroke, pushing the flushing liquid through the first needle 13 into the top of the root canal. During the movement of the first piston 12, the towing rope 30 drags the second piston 22 towards the upper limit of its stroke, and the flushing liquid in the apical region is drawn into the second tube 20 through the second needle 23.

[0097] After the first piston moves to the lower limit of its stroke, the second piston is at the upper limit of its stroke. In order to discharge the used flushing liquid in the second piston without causing linkage to the first piston, the first piston can be first moved to the upper limit of its stroke. After the towing rope becomes slack, the second piston is pushed downward to discharge the flushing liquid after flushing. After discharging, the first piston is again at the upper limit of its stroke, and the second piston is at the lower limit of its stroke. At this time, the flushing liquid is added to the first tube again, and the root canal can be continuously irrigated and rinsed.

[0098] In some preferred embodiments, a pre-cleaning step is further included, and the pre-cleaning step includes the following steps:

[0099] S0: The first piston 12 and the second piston 22 are both at the upper limit of their strokes. The flushing liquid is filled into the second tube 20. The second piston 22 moves towards the lower limit of its stroke, pushing the flushing liquid through the second needle 23 into the apical region until the second piston 22 moves to the lower limit of its stroke.

[0100] The "first", "second", etc. (such as the first tube, the second tube, the first through hole, the second through hole, etc.) used in the present invention are only used to distinguish the corresponding components for the sake of clear description, and are not intended to limit any order or emphasize importance, etc. In addition, the term "connection" used in the present invention, without special explanation, can be directly connected or indirectly connected through other components.

[0101] The specific embodiments described above further elaborate on the object, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A portable root canal cleaning device, characterized in that: It comprises a first tube (10), a first piston (12) movably arranged in the first tube (10), a first needle (13) connected to the bottom of the first tube (10), a second tube (20), a second piston (22) movably arranged in the second tube (20), and a second needle (23) connected to the bottom of the second tube (20); It also includes a traction rope (30), one end of which is connected to the first piston (12), and the other end of which is connected to the second piston (22). The traction rope (30) movably passes through an intermediate guide member (32), and the intermediate guide member (32) is located above the upper limit of the stroke of the first piston (12) and the upper limit of the stroke of the second piston (22).

2. A portable root canal cleaning device according to claim 1, characterized in that: A first push rod (11) is arranged on the first piston (12), and a second push rod (21) is arranged on the second piston (22); a linkage sleeve (14) is sleeved on the outer wall of the first push rod (11) and the second push rod (21); the linkage sleeve (14) can move synchronously with the corresponding first push rod (11) and the second push rod (21); and a short shaft for connecting the traction rope (30) is arranged on the linkage sleeve (14).

3. A portable root canal cleaning device according to claim 1, characterized in that: A first push rod (11) is arranged on the first piston (12), a second push rod (21) is arranged on the second piston (22), a linkage sleeve (14) is sleeved on the outer wall of the first push rod (11) and the second push rod (21), and a short shaft for connecting the traction rope (30) is arranged on the linkage sleeve (14); The bottom end of the linkage sleeve (14) is connected to a liquid inlet plate (15), the liquid inlet plate (15) comprising a cavity (151) for accommodating a first piston (12) or a second piston (22), the first piston (12) and the second piston (22) being provided with a first through hole (121), and the liquid inlet plate (15) being provided with a second through hole (152); The first piston (12) and the second piston (22) can rotate to a liquid inlet state and a flushing state. In the liquid inlet state, the first through hole (121) is connected to the second through hole (152), and the liquid above the liquid inlet plate (15) can flow to the bottom of the liquid inlet plate (15) through the first through hole (121) and the second through hole (152); in the flushing state, the first through hole (121) is not connected to the second through hole (152).

4. A portable root canal cleaning device according to claim 3, characterized in that: The inner wall of the liquid inlet plate (151) is provided with a spring piece (153) located in the cavity (151), and the outer walls of the first piston (12) and the second piston (22) are evenly provided with a plurality of toggling grooves (122), and the toggling grooves (122) are used to toggle the spring piece (153) when passing through the spring piece (153).

5. The portable root canal cleaning device according to claim 3, characterized in that: A liquid blocking plate (24) is arranged in the second tube (20), and a third through hole (25) is arranged on the liquid blocking plate (24); An extension rod (51) is connected to the bottom of the second piston (22), the bottom end of the extension rod (51) passes through the bottom of the liquid inlet plate (15) and is connected to a blocking member (52), and the blocking member (52) is used to block the third through hole (25) when the second piston (22) is in a liquid inlet state.

6. A portable root canal cleaning device according to any one of claims 2 to 5, characterized in that: A first guide member (31) is provided on the first tube (10), and a second guide member (33) is provided on the second tube (20); one end of the traction rope (30) is connected to the first guide member (31), and the other end of the traction rope (30) passes through the short shaft on the linkage sleeve (14) corresponding to the first push rod (11), the middle guide member (32), and the short shaft on the linkage sleeve (14) corresponding to the second push rod (21) in sequence, and is connected to the second guide member (33).

7. A portable root canal cleaning device according to claim 6, characterized in that: The length of the first needle (13) is smaller than the length of the second needle (23), and the diameter of the first needle (13) is larger than the diameter of the second needle (23).

8. The portable root canal cleaning device according to claim 6, characterized in that: The second needle (23) comprises an upper needle section (231) and a lower needle section (232), wherein the upper needle section (231) is connected to the bottom of the second tube (20), a rubber connector (6) is connected between the upper needle section (231) and the lower needle section (232), and a vibrator (7) for ultrasonically vibrating the lower needle section (232) is provided on the outer wall of the lower needle section (232).

9. A method for using a portable root canal cleaning device, characterized in that: A portable root canal cleaning device according to any one of claims 1 to 8 is used, and the method of using the device comprises the following steps: S1: the first piston (12) is located at the upper limit of its stroke, and the second piston (22) is located at the lower limit of its stroke; S2: the flushing liquid is loaded into the first tube (10); S3: The first piston (12) moves toward the lower limit of its stroke, pushing the flushing liquid into the top of the root canal through the first needle (13). During the movement of the first piston (12), the traction rope (30) drags the second piston (22) toward the upper limit of its stroke, and the flushing liquid in the apical area is drawn into the second tube (20) through the second needle (23).

10. A method for using a portable root canal cleaning device according to claim 1, characterized in that: The following steps are also included: S0: The first piston (12) and the second piston (22) are both located at their upper stroke limits, the flushing liquid is loaded into the second tube (20), and the second piston (22) moves toward its lower stroke limit, pushing the flushing liquid into the root apex region through the second needle (23) until the second piston (22) moves to its lower stroke limit.

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