A device for topical administration of a medicament for dental diseases in the oral cavity

Abstract

This invention relates to the field of oral medical device technology, specifically to a local drug delivery device for dental diseases in endodontics. It includes a syringe and a needle tube connected to each other. A piston is slidably connected inside the syringe, and a driving component is provided inside the syringe to move the piston. A sealed annular chamber is formed inside the inner wall of the syringe, and an annular block is slidably connected inside the annular chamber. A fixed ring is slidably fitted at the bottom end of the needle tube, and a movable chamber is formed inside the fixed ring. A support ring is rotatably connected to the inner wall of the movable chamber, and several fan blades are fixedly connected to the support ring. A sponge block is detachably connected to the bottom of each fan blade. An air inlet is formed on the fixed ring, obliquely positioned, and connected to an airflow pipe. A driving component is provided inside the syringe to drive the annular block vertically. This invention is simple and easy to operate. The fan blades and sponge block effectively prevent the dilution of the drug by oral secretions, thus improving the treatment effect.

Description

Technical Field

[0001] This invention relates to the field of oral medical device technology, specifically to a local drug delivery device for dental diseases in oral medicine. Background Technology

[0002] Dental diseases in the Department of Oral Medicine mainly include dental caries, pulpitis, periapical periodontitis, etc., which are common types of oral diseases in clinical practice. Local drug administration is one of the important means of treating dental diseases. By delivering drugs directly to the disease site, the treatment effect can be enhanced. At the same time, local drug administration can reduce the side effects of systemic drug administration.

[0003] The existing Liker TZS-A type push-type drug delivery device consists of a nozzle, cap, cavity, and inhaler connection port. It can accurately push the drug to the target location in the oral cavity. However, during use, the oral cavity secretes liquid, which reduces the effectiveness of the drug. When the device pushes the drug in the oral cavity, it cannot resist the liquid secreted by the oral cavity, which causes the drug to be diluted and washed away, thereby reducing the drug's effect on the lesion site.

[0004] Therefore, it is necessary to propose a drug delivery device that can avoid diluting the drug with oral secretions and reducing its efficacy when administering the drug locally in the oral cavity. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a local drug delivery device for dental diseases in the oral cavity, which solves the problem of reduced drug efficacy due to oral secretions during local drug delivery, thereby more effectively treating dental diseases in the patient's oral cavity.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: A local drug delivery device for dental diseases in oral cavity includes a syringe and a needle tube that are interconnected. A piston is slidably connected inside the syringe, and sealing rings are fixedly connected to the outer periphery of the piston. A pushing component for driving the piston to move is provided inside the syringe. A sealed annular chamber is opened on the inner wall of the syringe. An annular block is slidably connected inside the annular chamber. A fixed ring is slidably fitted at the bottom end of the needle tube. A movable chamber is opened inside the fixed ring. A support ring is rotatably connected to the inner wall of the movable chamber. A plurality of fan blades are fixedly connected to the support ring. A sponge block is detachably connected to the bottom of each fan blade. An air inlet corresponding to the fan blade is opened on the fixed ring. The air inlet is obliquely arranged on the movable chamber. The air inlet is connected to a telescopic airflow pipe that passes through the bottom of the annular chamber and communicates with the annular chamber. A driving component for driving the annular block to move vertically is provided inside the syringe.

[0007] The technical principle of the above solution is as follows: The driving component drives the annular block to move within the sealed annular chamber. The annular block compresses the gas within the sealed annular chamber. The gas is transmitted to the fan blade through the airflow pipe and the air inlet on the movable chamber corresponding to the fan blade, driving the support ring to rotate. The support ring drives the fan blade to rotate. When the fan blade rotates, the sponge block at its bottom rotates synchronously, pushing the component to push the piston to slide along the inner wall of the syringe, pushing the drug solution through the needle to the lesion site. During drug administration, the sponge block comes into contact with the lesion site and absorbs the liquid secreted in the oral cavity, thereby forming a relatively dry drug administration interface on the surface of the lesion.

[0008] The above-mentioned scheme has the following beneficial effects: the pushing component can drive the piston to move inside the syringe, and the sealing ring on the outer periphery of the piston provides support for the piston, so that the piston is not suspended in the syringe and avoids tilting or jamming during movement, thus making the drug administration operation more convenient. The setting of the air inlet and airflow channel can accurately deliver gas to the fan blade, thereby better enabling the support ring to rotate. The setting of the fan blade and sponge block effectively avoids the dilution of the drug by oral secretions, ensuring that the drug acts directly on the relatively dry lesion site, thus improving the treatment effect.

[0009] Furthermore, the actuating component includes a push plate slidably connected inside the syringe, a partition slidably connected inside the syringe and located vertically above the push plate, a push rod fixedly connected to the top of the push plate passing through the partition and extending outside the syringe, symmetrically opened connecting holes on the push plate, and symmetrically connected to guide rods slidably connected to the bottom of the partition and slidingly connected to the push plate, with the guide rods all passing through the connecting holes and fixedly connected to the top of the piston.

[0010] Beneficial effects: The push plate and push rod allow the piston to move inside the syringe, thereby administering the medication and making the operation more convenient. The push plate, partition, and guide rod prevent excessive pressure during administration and improve medication safety.

[0011] Furthermore, the driving component includes symmetrically arranged grooves on the inner wall of the syringe. A first spring is fixedly connected to the top wall of each groove, and a slider is fixedly connected to the other end of each first spring. The length of each slider is less than the width of the groove. One side of the slider extends into the syringe and is located in the movement trajectory of the push plate. Each slider is located vertically above the annular chamber. A connecting rod is slidably connected to the bottom of each slider. The bottom of each connecting rod extends into the annular chamber and is fixedly connected to the top of the annular block.

[0012] Beneficial effects: The first spring allows the slider to return to its original position more easily after movement, eliminating the need for manual reset and making operation more convenient. The groove restricts the movement trajectory of the slider, improving the overall stability of the device. The connecting rod and the annular block ensure that the annular cavity remains sealed when the annular block moves, preventing air leakage and improving operational reliability.

[0013] Furthermore, a limiting block is slidably connected inside the annular cavity, and several second springs are fixedly connected to the top of the limiting block. The other end of each second spring is fixedly connected to the top wall of the annular cavity. The limiting block has symmetrical clearance grooves, and the end of the connecting rod away from the slider slides through the clearance groove and is fixedly connected to the top of the annular block.

[0014] Beneficial effects: The spring setting helps the limit block to reset better, improving the ease of operation; the clearance groove setting ensures that the connecting rod is not affected by the limit block when driving the annular block, improving the reliability of operation.

[0015] Furthermore, the syringe surface is provided with graduation lines.

[0016] Beneficial effects: The graduated lines allow medical staff to clearly see the amount of medication injected, accurately control the dosage, and better assist medical staff in treating patients' dental diseases.

[0017] Furthermore, protective sleeves are symmetrically fixed to the outside of the syringe.

[0018] Beneficial effects: The protective sleeve prevents the oral cavity from directly contacting the outer wall of the syringe, improving safety during use.

[0019] Furthermore, a vent hole is provided at the top of the syringe.

[0020] Beneficial effects: The vent hole can balance the internal air pressure of the syringe, preventing excessive internal air pressure from causing piston jamming during drug injection, and ensuring a smooth and stable injection process.

[0021] Furthermore, the bottom of the sliders is rounded, and the bottom of the grooves is sloped.

[0022] Beneficial effects: It can improve the fit of the structure and reduce the wear and tear on the slider.

[0023] Furthermore, a handle is provided at the end of the push rod away from the push plate, and the handle has anti-slip texture.

[0024] Beneficial effects: The handle design makes it easier for medical staff to push the lever, making operation easier. The anti-slip texture increases the friction between the medical staff's hand and the handle, making it less likely for the medical staff's hand to slip or fall off when pulling or pushing the handle.

[0025] Furthermore, hooks are symmetrically fixedly connected to the fixed ring, and each hook is equipped with a fixing line for pulling the fixed ring upward. The other end of the fixing line passes through the bottom of the syringe and extends into the annular cavity to be fixedly connected to the bottom of the limiting block.

[0026] Beneficial effects: When the limiting block moves upward, the fixing line pulls the fixing ring upward, which can prevent the fixing ring from rubbing off the medicine on the lesion, ensuring that the medicine stays in the target position and exerts its full effect. Attached Figure Description

[0027] Figure 1 This is a front view of the overall structure of an embodiment of the local drug delivery device for dental diseases in oral medicine according to the present invention; Figure 2 This is a front cross-sectional view of the overall structure of an embodiment of the local drug delivery device for dental diseases in oral medicine according to the present invention; Figure 3 This is a top sectional view of the fixing ring of an embodiment of the local drug delivery device for dental diseases in oral medicine according to the present invention; Figure 4 This is a magnified schematic diagram of a portion of the active cavity in an embodiment of the local drug delivery device for dental diseases in oral medicine according to the present invention.

[0028] The reference numerals in the accompanying drawings of the instruction manual include: 1. Syringe; 2. Needle tube; 3. Push rod; 4. Push plate; 5. Piston; 6. Protective sleeve; 7. Handle; 8. Scale line; 9. Airflow channel; 10. Fixing line; 11. Hook; 12. Guide rod; 13. Connecting hole; 14. First spring; 15. Connecting rod; 16. Annular block; 17. Slider; 18. Support ring; 19. Fan blade; 20. Sponge block; 21. Air inlet; 22. Slide groove; 23. Fixing ring; 24. Movable chamber; 25. Annular chamber; 26. Vent hole; 27. Second spring; 28. Limiting block; 29. ​​Clearance groove; 30. Partition plate; 31. Sealing ring. Detailed Implementation

[0029] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] The following detailed description illustrates the specific implementation method: Example 1:

[0033] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 and attached Figure 4 As shown, a local drug delivery device for dental diseases in oral cavity includes a syringe 1 and a needle tube 2 that are interconnected. A piston 5 is slidably connected inside the syringe 1. Sealing rings 31 are bonded to the outer periphery of the piston 5. A pushing assembly for pushing the piston 5 to move is provided inside the syringe 1. The pushing assembly includes a push plate 4 slidably connected inside the syringe 1. A partition 30 located vertically above the push plate 4 is slidably connected inside the syringe 1. A push rod 3 passing through the partition 30 and extending to the outside of the syringe 1 is fixedly connected to the top of the push plate 4. Connection holes 13 are symmetrically opened on the push plate 4. Guide rods 12 slidably connected to the bottom of the partition 30 are symmetrically connected to the push plate 4. The guide rods 12 all pass through the connection holes 13 and are fixedly connected to the top of the piston 5. The syringe 1 has a sealed annular chamber 25 on its inner wall. An annular block 16 is slidably connected inside the annular chamber 25. The syringe 1 is equipped with a drive assembly for pushing the annular block 16 to move vertically. The drive assembly includes symmetrically opened grooves 22 on the inner wall of the syringe 1. A first spring 14 is welded to the top wall of each groove 22. A slider 17 made of elastic material is welded to the other end of each first spring 14. The bottom of each slider 17 is arc-shaped, and the bottom of each groove 22 is inclined. The length of each slider 17 is less than the width of each groove 22. One side of each slider 17 extends into the syringe 1 and is located in the movement trajectory of the push plate 4. Each slider 17 is located vertically above the annular chamber 25. The bottom of each slider 17 is slidably connected to a connecting rod 15 via a slide rail. The bottom of each connecting rod 15 extends into the annular chamber 25 and is welded to the top of the annular block 16. In addition, a fixed ring 23 is slidably fitted at the bottom of the needle tube 2. A movable chamber 24 is opened inside the fixed ring 23. A support ring 18 is rotatably connected to the inner wall of the movable chamber 24. Several fan blades 19 are welded on the support ring 18. A sponge block 20 is detachably connected to the bottom of each fan blade 19. An air inlet 21 corresponding to the fan blade 19 is opened on the fixed ring 23. The air inlet 21 is obliquely set on the movable chamber 24. The air inlet 21 is connected to a telescopic airflow pipe 9 that passes through the bottom of the annular chamber 25 and is connected to the annular chamber 25.

[0034] The specific implementation process is as follows: When it is necessary to administer medication to the dental lesions in the oral cavity, the medical staff will insert the needle 2 into the patient's oral cavity, aim the needle 2 at the lesion, and push the push rod 3 to move the push plate 4 welded to it. When the push plate 4 moves to the top of the slider 17 extending into the syringe, the push plate 4 continues to move and contacts the slider 17 located in the movement trajectory of the push plate 4. The slider 17 is also driven and moves along the slide groove 22. The slider 17 drives the annular block 16 to move along with it through the connecting rod 15. The annular block 16 moves in the sealed annular chamber 25, compressing the gas, so that the gas is transmitted to the fan blade 19 through the airflow pipe 9 and the air inlet 21 on the movable chamber 24 corresponding to the fan blade 19. Since the air inlet 21 is obliquely set... Placed on the movable chamber 24, the gas entering the movable chamber 24 will generate thrust on the fan blade 19, providing driving force for the rotation of the support ring 18 welded to the fan blade 19. The rotation of the support ring 18 drives the fan blade 19 to rotate. When the fan blade 19 rotates, the sponge block 20 at its bottom rotates synchronously, so that the sponge block 20 absorbs the oral secretions that come into contact with the lesion, thereby forming a relatively dry drug delivery interface on the lesion surface, ensuring that the drug acts directly on the relatively dry lesion site, and improving the treatment effect. When the push plate 4 pushes the slider 17 extending into the syringe 1 to move the slider 17 to the bottom of the groove 22, and the medical staff continues to push the push rod 3 to move the push plate 4 downward, the bottom of the slider 17, made of elastic material, is in tangential contact with the inclined surface. Since the bottom surface of the slider is arc-shaped, when it contacts the inclined surface, the inclined surface generates an upward component force that makes it easier to lift the slider 17, so that the slider 17 moves upward along the bottom inclined surface of the groove 22. When the slider 17 is completely in the groove 22, the first spring 14 will pull the slider 17 upward to reset the slider 17. When medical staff push the push rod 3, it moves the push plate 4 welded to it, causing the push plate 4 to slide along the guide rod 12 welded to the top of the piston 5. When it slides into contact with the piston 5, the push rod 3 is pushed again, and the push plate 4 moves the piston 5 inside the syringe 1. The sealing ring 31 on the outer periphery of the piston 5 provides support for the piston 5, so that the piston 5 is not suspended in the syringe 1, and avoids the piston 5 tilting or getting stuck when moving. The piston 5 squeezes the liquid medicine, pushing the liquid medicine through the needle tube 2 to the lesion site to complete the drug administration. During the drug administration process, medical staff only need to continuously push the push rod 3 without changing instruments or interrupting the action. The lesion site can be treated and drug administered in one injection, reducing the number of times instruments are inserted and removed from the patient's mouth, improving patient comfort and treatment efficiency.

[0035] Example 2:

[0036] As attached Figure 1 Appendix Figure 2As shown, the difference from Embodiment 1 is that: the surface of the syringe 1 is provided with scale lines 8, the outer side of the syringe 1 is symmetrically welded with protective sleeves 6, and the top of the syringe 1 is also provided with a vent hole 26. The end of the push rod 3 away from the push plate 4 is provided with a handle 7, and the handle 7 is provided with anti-slip texture.

[0037] The specific implementation process is as follows: When medication needs to be administered to the dental lesions in the oral cavity, the medical staff inserts the syringe 2 into the patient's oral cavity. The protective sleeve 6 prevents the patient's oral cavity from directly contacting the outer wall of the syringe, improving safety. The syringe 2 is aligned with the lesion, and the hand is placed on the handle 7 with anti-slip texture. The push rod 3 is pushed to move the push plate 4. The push plate 4 moves the piston 5 inside the syringe 1. The piston 5 pushes the liquid medication through the syringe 2 to the lesion. The vent 26 balances the internal air pressure of the syringe 1, preventing the piston 5 from getting stuck due to excessive internal air pressure during medication administration, ensuring a smooth and stable injection process. The scale line 8 allows the medical staff to clearly see the amount of medication injected, accurately control the dosage, and better assist the medical staff in treating dental diseases in the patient's oral cavity.

[0038] Example 3:

[0039] As attached Figure 1 Appendix Figure 2 As shown, the difference from Embodiment 2 is that: an annular limiting block 28 matching the annular chamber 25 is slidably connected inside the annular chamber 25. Several second springs are welded to the top of the limiting block 28, and the other end of each second spring is welded to the top wall inside the annular chamber 25. The limiting block 28 has symmetrical clearance grooves 29. The end of the connecting rod 15 away from the slider slides through the clearance groove 29 and is welded to the top of the annular block 16. Hooks 11 are symmetrically welded to the fixing ring 23. Each hook 11 has a fixing line 10 for pulling the fixing ring 23 upward. The other end of the fixing line 10 passes through the bottom of the syringe 1 and extends into the annular chamber 25 and is bonded to the bottom of the limiting block 28 with medical adhesive.

[0040] The specific implementation process is as follows: When the first spring 14 pulls the slider 17 upward, the slider 17 is reset. When the slider 17 moves upward, the connecting rod 15, which is slidably connected to the slider 17, slides upward in the relief groove 29, causing the annular block 16 to move upward. When the annular block 16 moves upward and contacts the limiting block 28 located vertically above the annular block 16, the annular block 16 continues to move, pushing the limiting block 28, which is slidably connected in the annular chamber 25, to move upward in the annular chamber 25. This causes the fixing line 10, which is bonded to the bottom of the limiting block 28, to drive the fixing ring 23 to move upward along the needle tube 2. This prevents the fixing ring 23 from blocking the lesion area when medical staff administer medication to the dental lesion in the oral cavity, thus obstructing the medical staff's vision and affecting the operation. It also prevents the fixing ring 23 from rubbing off the medication on the lesion, ensuring that the medication stays at the target position, fully exerting the drug's efficacy, and improving the treatment effect. After a single dose is administered, if repeated administration is required for other lesions on the same patient, the operator can first remove the syringe 2 from the patient's mouth and place it into the medication. Since the fixing ring 23 is still held away from the bottom of the syringe 2 by the fixing line 10, it will not affect the operation during medication aspiration. Then, pull back the push rod 3, causing the push plate 4 to slide along the guide rod 12 welded to the bottom of the partition 30. When the push plate 4 moves to contact the partition 30, continue to pull back the push rod 3, causing the partition 30 to slide inside the syringe 1, thereby moving the piston 5 and drawing the medication from the syringe 2 into the syringe 1. Then, repeat the medication administration operation to complete the administration. The reusable design allows the same device to be used multiple times, further improving the continuity of treatment and ease of operation, and reducing costs.

[0041] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A local drug delivery device for dental diseases in oral cavity, comprising a syringe (1) and a needle tube (2) connected to each other, characterized in that: A piston (5) is slidably connected inside the syringe (1). A sealing ring (31) is fixedly connected to the outer periphery of the piston (5). A pushing component for pushing the piston (5) to move is provided inside the syringe (1). A sealed annular chamber (25) is opened inside the inner wall of the syringe (1). An annular block (16) is slidably connected inside the annular chamber (25). The bottom end of the syringe (2) is slidably fitted with a fixed ring (23). The fixed ring (23) has a movable chamber (24) inside. The inner wall of the movable chamber (24) is rotatably connected to a support ring (18). Several fan blades (19) are fixedly connected to the support ring (18). The bottom of each fan blade (19) is detachably connected to a sponge block (20). The fixed ring (23) has an air inlet (21) corresponding to the fan blade (19). The air inlet (21) is obliquely set on the fixed ring (23). The air inlet (21) is connected to a telescopic airflow pipe (9) that passes through the bottom of the annular chamber (25) and is connected to the annular chamber (25). The syringe (1) is provided with a drive component for pushing the annular block (16) to move vertically.

2. The local drug delivery device for dental diseases in oral cavity according to claim 1, characterized in that: The pushing assembly includes a push plate (4) slidably connected inside the syringe (1), a partition (30) slidably connected inside the syringe (1) and located vertically above the push plate (4), a push rod (3) fixedly connected to the top of the push plate (4) through the partition (30) and extending to the outside of the syringe (1), a connecting hole (13) symmetrically opened on the push plate (4), and a guide rod (12) symmetrically connected to the bottom of the partition (30) and slidably connected to the push plate (4), and the guide rod (12) passes through the connecting hole (13) and is fixedly connected to the top of the piston (5).

3. The local drug delivery device for dental diseases in oral cavity according to claim 2, characterized in that: The driving assembly includes symmetrical grooves (22) on the inner wall of the syringe (1). A first spring (14) is fixedly connected to the top wall of each groove (22). A slider (17) is fixedly connected to the other end of each first spring (14). The length of each slider (17) is less than the width of the groove (22). One side of each slider (17) extends into the syringe (1) and is located in the movement trajectory of the push plate (4). Each slider (17) is located vertically above the annular chamber (25). A connecting rod (15) is slidably connected to the bottom of each slider (17). The bottom of each connecting rod (15) extends into the annular chamber (25) and is fixedly connected to the top of the annular block (16).

4. The local drug delivery device for dental diseases in oral cavity according to claim 3, characterized in that: A limiting block (28) is slidably connected inside the annular chamber (25). Several second springs (27) are fixedly connected to the top of the limiting block (28). The other end of each second spring (27) is fixedly connected to the top wall inside the annular chamber (25). A relief groove (29) is symmetrically opened on the limiting block (28). The end of the connecting rod (15) away from the slider (17) slides through the relief groove (29) and is fixedly connected to the top of the annular block (16).

5. The local drug delivery device for dental diseases in oral cavity according to claim 4, characterized in that: The syringe (1) has graduation lines (8) on its surface.

6. The local drug delivery device for dental diseases in oral cavity according to claim 5, characterized in that: The syringe (1) is symmetrically fixed with protective sleeves (6) on the outside.

7. The local drug delivery device for dental diseases in oral cavity according to claim 6, characterized in that: The syringe (1) has a vent hole (26) at the top.

8. The local drug delivery device for dental diseases in endodontics according to claim 7, characterized in that: The bottom of the slider (17) is rounded, and the bottom of the groove (22) is inclined.

9. The local drug delivery device for dental diseases in endodontics according to claim 8, characterized in that: The push rod (3) has a handle (7) at the end away from the push plate (4), and the handle (7) has anti-slip texture.

10. The local drug delivery device for dental diseases in endodontics according to claim 9, characterized in that: Hooks (11) are symmetrically fixedly connected to the fixed ring (23). Each hook (11) is provided with a fixed line (10) for pulling the fixed ring (23) upward. The other end of the fixed line (10) passes through the bottom of the syringe (1) and extends into the annular chamber (25) and is fixedly connected to the bottom of the limiting block (28).

Images