Periodontitis medicine applicator for dental department

Abstract

The application relates to the technical field of oral medical instruments, and discloses a stomatological periodontitis medicine applying device, which comprises a gas compression structure placed in an air compression cavity and capable of moving along the axial direction of the air compression cavity. The stomatological periodontitis medicine applying device utilizes the pushing effect of the piston structure in the closed space to generate high-speed flowing air, so that the high-speed flowing air drives the powdery anti-inflammatory medicine to be sprayed to the periodontitis site of a patient. The spraying form can make the medicine collide with the inflamed site at a certain speed, so that the medicine can tightly adhere to the site at a certain force after being adhered to the site. Meanwhile, the spraying can make the medicine dust have a wider coverage, and the limitation condition of the working space is small. In addition, when the device blows in the powdery medicine, high-pressure air is blown in first, and the medicine dust is blown in last. The high-pressure air can blow away most of the sundries existing in the inflamed site, so that the medicine can act on the inflamed site more directly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oral medical instruments, in particular to a periodontitis medicine applicator for stomatology. BACKGROUND

[0002] Periodontitis is a disease of the soft tissue around the teeth, which is caused by dental plaque acting on the teeth and stimulating the periodontal tissue. Dental plaque is the initiating factor of periodontitis, and the treatment of periodontitis mainly includes basic treatment, which removes dental calculus, dental plaque and some inflammatory granulation tissue around the teeth by ultrasonic oscillation, then alternately flushes the local area with 3% hydrogen peroxide and physiological saline, and finally applies iodine glycerol or Perio to the local area for anti-inflammatory, and then uses mouthwash to maintain the bacterial environment in the oral cavity and keep the oral cavity clean.

[0003] In order to facilitate the medicine application for periodontitis, the patent number CN105943184A discloses a periodontitis medicine applicator for stomatology, which mainly comprises a hand pressing plate, a push rod, a hollow tube, a connecting port, a spring and a medicine loading tip. The hand pressing plate is connected with the push rod, the push rod is provided with a baffle I and a baffle II, the push rod is located in the center of the hollow tube, the inner wall of the hollow tube is provided with a baffle IV and a baffle V, the front end of the hollow tube is provided with the connecting port, the spring is arranged between the baffle I and the baffle V in the hollow tube, the medicine loading tip can be assembled and disassembled with the connecting port, the front end of the medicine loading tip is provided with a medicine loading port, and the design with scale lines can quantitatively administer medicine, so as to avoid insufficient drug effect due to insufficient administration or waste due to excessive administration. Since the medicine loading tip can be disassembled and replaced, the medicine in the medicine bottle is prevented from being polluted, cross infection is avoided, one medicine applicator can be reused, and different medicines can be delivered. The design of the arc-shaped medicine loading tip makes it easy to operate when medicine is applied to the deep part of the oral cavity.

[0004] In actual work, some specific dry powder medicines may also be used when periodontitis is medicated. When the powder medicine is pushed in the hollow tube, the powder will be gradually accumulated, which will cause difficulty in extrusion. Moreover, the medicine extruded by the above-mentioned extrusion is covered on the lesion site in a smearing manner. Since the internal environment of the tooth is complex and the working space is relatively small, there are many spaces that cannot be smeared, and the medicine application effect is general. SUMMARY

[0005] (I) Technical problems solved

[0006] In view of the defects of the prior art, the present application provides a periodontitis medicine applicator for stomatology, which utilizes the pushing effect of the piston structure inside the closed space to generate high-speed flowing air, so that the high-speed flowing air drives the powdery anti-inflammatory medicine to be sprayed to the periodontitis site of the patient. The spraying form can make the medicine collide with the inflamed site at a certain speed, so that the medicine can be tightly attached to the site at a certain force after being adhered to the site. Meanwhile, the spraying can make the medicine dust have a wider coverage and be less limited by the working space. In addition, when the device blows in the powdery medicine, high-pressure air is blown in first, and then the medicine dust is blown in. The high-pressure air can blow away most of the debris at the inflamed site, so as to ensure that the medicine can act more directly on the inflamed site, thereby solving the above technical problems.

[0007] (II) Technical solutions

[0008] To achieve the above object, the present application provides the following technical solutions: a periodontitis medicine applicator for stomatology, comprising a cylindrical air compression pipeline, a needle tube structure installed at the center of one end surface of the cylindrical air compression pipeline, an air compression cavity arranged inside the cylindrical air compression pipeline, a medicine delivery hole arranged inside the needle tube structure and used for flowing air, a powdery medicine adding shell arranged above the needle tube structure, a disc-shaped rotating cavity arranged at the middle section of the powdery medicine adding shell, a medicine dropping hole arranged at the bottom of the disc-shaped rotating cavity and communicated with the medicine delivery hole, and a medicine storage chamber arranged at the top end of the disc-shaped rotating cavity, further comprising a gas compression structure placed inside the air compression cavity and movable along the axial direction thereof, wherein a gas check valve is arranged inside the gas compression structure, the gas check valve is closed when the gas compression structure moves towards the needle tube structure, and vice versa; a medicine adding structure rotatably installed inside the disc-shaped rotating cavity and capable of making the medicine in the medicine storage chamber quantitatively enter the inside of the medicine dropping hole when rotating, wherein the rotating end of the medicine adding structure extends to the periphery of one side of the powdery medicine adding shell; a one-way rotating structure installed at the rotating end of the medicine adding structure, wherein the one-way rotating structure is a brakeable structure and a gear ring is installed on the outer circumferential surface thereof; and a linkage structure capable of driving the gas compression structure to generate reciprocating motion and making the gear ring rotate; when the gas compression structure moves to the middle section of the air compression cavity, the part of the medicine adding structure containing the powder medicine just moves to the top of the medicine dropping hole.

[0009] Through the technical scheme, the pushing effect of the piston structure in the closed space generates high-speed flowing air, so that the high-speed flowing air drives the powdery anti-inflammatory medicine to be sprayed to the periodontitis site of the patient. The spraying form can make the medicine collide with the inflammation site at a certain speed, so that the medicine can be tightly attached to the site at a certain force after being adhered to the inflammation site. Meanwhile, the spraying can make the medicine dust have a wider coverage, and the limitation condition of the working space is small. In addition, when the device blows the powdery medicine, high-pressure air is blown first, and then the medicine dust is blown. The high-pressure air can blow away most of the sundries at the inflammation site, so that the medicine can act on the inflammation site more directly.

[0010] Preferably, the linkage structure comprises a movable rod penetrating into the air compression cavity and a movable plate, one end of the movable rod is fixedly connected with one end surface of the gas compression structure, one end of the movable rod and the movable plate is flush and connected through a push plate, the movable plate is provided with an external tooth structure on the bottom surface close to the other end thereof, the external tooth structure is engaged with a gear ring, the circumferential surface of the cylindrical air compression pipeline is provided with a limiting plate, the limiting plate is provided with a guide groove for horizontal movement of the movable plate, and the movable rod is provided with a limiting hole at the penetrating end surface of the cylindrical air compression pipeline, and the structure radius of the limiting hole is greater than the rod body diameter of the movable rod.

[0011] Through the technical scheme, when the push plate is reciprocally pushed, the piston plate and the gear ring can be moved at the same time, so that the gas is compressed and the powdery medicine is put at the same time, the gas drives the powdery medicine to be sprayed, and the spraying injection is realized.

[0012] Preferably, the gas compression structure comprises a piston plate which is horizontally movable in the air compression cavity and is installed at one end of the movable rod, the outer circumferential surface of the piston plate is sleeved with a sealing ring, the plate body of the piston plate is provided with a plurality of annular array type air holes, and one gas one-way valve is installed in each air hole, the gas one-way valve is provided with an air inlet direction and an air outlet direction, the air inlet direction is toward the limiting hole, and the air outlet direction is toward the medicine feeding hole.

[0013] Through the technical scheme, when the piston plate moves toward the medicine feeding hole, the gas in the region is compressed, so that the gas is blown to the inflammation site of the patient through the medicine feeding hole, the inflammation site can be dried, the virus is completely exposed, the high-speed flowing gas can drive the medicine dust to be blown to the inflammation site, so that the medicine collides with the inflammation site at a certain speed, and the medicine can be tightly attached to the site at a certain force after being adhered to the inflammation site, the effect and range of the medicine are improved, when the piston plate moves reversely, the gas one-way valve can realize the timely entry of the gas, so as to reduce the phenomenon that the gas in the oral cavity enters into the medicine feeding hole, and reduce the influence on the environment and the dust in the oral cavity.

[0014] Preferably, the medicine adding structure comprises a rotating valve placed inside a disc-shaped rotating cavity, a rotating shaft is fixedly installed at the center of one end surface of the rotating valve, the shaft body of the rotating shaft penetrates through the powder medicine adding shell and is provided with a one-way rotating structure at the end, the circumferential surface of the rotating valve is provided with a plurality of annular array type medicine storage grooves, the arc length between two adjacent medicine storage grooves is smaller than the horizontally movable length of the piston plate, and when the piston plate is close to the limiting hole, the top end of the medicine dropping hole is located at the complete arc surface in the outer circumferential surface of the rotating valve.

[0015] Through the above technical scheme: when the movable plate moves towards the needle tube structure, the outer tooth structure and the gear ring cooperate to make the rotating shaft rotate, which drives the rotating valve to rotate, in the rotating process, the medicine storage groove can store the powder medicine falling into it under the action of gravity, and finally discharge through the medicine dropping hole, realizing the timed discharge of the powder raw material.

[0016] Preferably, the one-way rotating structure comprises an outer annular shell installed in the inner ring of the gear ring, an inner rotating body is seamlessly installed at the center of the inner part of the outer annular shell, the center of the inner rotating body is provided with a shaft body mounting hole for fixedly installing the rotating shaft, the outer annular shell is provided with a plurality of annular array type semi-annular movable chambers in the middle region of the circumferential surface of the inner rotating body, one triangular chamber is arranged in the same direction of each semi-annular movable chamber, one triangular contact block with a corresponding structure is placed in each triangular chamber, an annular rubber body is placed in each semi-annular movable chamber, one end of the annular rubber body abuts against one end surface of the triangular contact block and can generate a certain degree of pressure on the triangular contact block, and when the movable plate moves towards the needle tube structure, the outer annular shell and the inner rotating body rotate synchronously, otherwise, the outer annular shell rotates while the inner rotating body is in a stationary state.

[0017] Through the above technical scheme: when the movable plate moves towards the needle tube structure, the outer annular shell and the inner rotating body rotate synchronously because the triangular contact block is inserted into the triangular chamber at this time and is affected by the shell wall, so that the medicine can be transmitted downward into the high-speed flowing air, realizing jet type medicine injection, after a single medicine injection is completed, when the movable plate is pulled in the reverse direction, the outer annular shell rotates while the inner rotating body is in a stationary state, at this time, the medicine will not be transmitted downward, realizing directional medicine injection, otherwise, when the triangular contact block moves towards the semi-annular movable chamber, a certain compression phenomenon will occur to the annular rubber body, the outer annular shell and the inner rotating body are loose and can move relatively, so that one of the components will not rotate and will not drive the medicine storage groove to continue the circumferential movement, realizing the reset of the component without powder discharge.

[0018] Compared with the prior art, the periodontitis medicine applicator for stomatology has the following beneficial effects:

[0019] The periodontitis medicine applicator for stomatology uses the pushing effect of the piston structure inside the closed space to generate high-speed flowing air, so that the high-speed flowing air drives the powdery anti-inflammatory medicine to be sprayed to the periodontitis site of the patient. The spraying form can make the medicine collide with the inflamed site at a certain speed, so that the medicine can be tightly attached to the site at a certain force after being adhered to the site. Meanwhile, the spraying can make the medicine dust have a wider coverage, and the limitation condition of the working space is small. In addition, when the device blows in the powdery medicine, high-pressure air is blown in first, and then the medicine dust is blown in. The high-pressure air can blow away most of the sundries at the inflamed site, so as to ensure that the medicine can act on the inflamed site more directly. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a front view of the present application;

[0021] Figure 2 It is a full cross-sectional structure schematic diagram of the present application;

[0022] Figure 3 It is a perspective view of the linkage structure in the present application;

[0023] Figure 4 It is a perspective view of the gas compression structure in the present application;

[0024] Figure 5 It is a perspective view of the medicine adding structure in the present application;

[0025] Figure 6 It is a full cross-sectional structure schematic diagram of the one-way rotation structure in the present application;

[0026] Figure 7 It is a perspective view of the gear ring in the present application.

[0027] 1, cylindrical air compression pipeline; 2, needle tube structure; 3, air compression cavity; 4, medicine adding delivery hole; 5, limiting hole; 6, powdery medicine adding shell; 7, medicine falling hole; 8, disc-shaped rotation cavity; 9, medicine storage chamber; 10, limiting plate; 11, linkage structure; 111, movable rod; 112, movable plate; 113, push plate; 114, external tooth structure; 12, gas compression structure; 121, piston plate; 122, sealing ring; 123, air hole; 124, gas one-way valve; 13, medicine adding structure; 131, rotary valve; 132, rotary shaft; 133, medicine storage groove; 14, one-way rotation structure; 141, outer annular shell; 142, inner rotary body; 143, semi-annular movable chamber; 144, triangular chamber; 145, annular rubber body; 146, triangular abutting block; 147, shaft body mounting hole; 15, gear ring. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0029] Please refer to Figure 1 , Figure 2 and Figure 7 , a periodontal disease medicine applicator in stomatology comprises a cylindrical air compression pipeline 1, a needle tube structure 2 installed at the center of one end surface of the cylindrical air compression pipeline 1, an air compression cavity 3 arranged inside the cylindrical air compression pipeline 1, a medicine delivery hole 4 arranged inside the needle tube structure 2 and used for flowing air, a powdery medicine adding shell 6 arranged above the needle tube structure 2, a disc-shaped rotating cavity 8 arranged at the middle section inside the powdery medicine adding shell 6, a medicine dropping hole 7 arranged at the bottom of the disc-shaped rotating cavity 8 and communicated with the medicine delivery hole 4, and a medicine storage chamber 9 arranged at the top end of the disc-shaped rotating cavity 8, further comprising a gas compression structure 12 placed inside the air compression cavity 3 and movable along the axial direction thereof, wherein a gas one-way valve is arranged inside the gas compression structure 12, the gas one-way valve is closed when the gas compression structure 12 moves towards the needle tube structure 2, and the gas one-way valve is opened conversely; a medicine adding structure 13 is rotatably installed inside the disc-shaped rotating cavity 8 and capable of making the medicine in the medicine storage chamber 9 quantitatively enter the inside of the medicine dropping hole 7 when rotating, the rotating end of the medicine adding structure 13 extends to the periphery of one side of the powdery medicine adding shell 6; a one-way rotating structure 14 is installed at the rotating end of the medicine adding structure 13, the one-way rotating structure 14 is a structure capable of timely braking, and a gear ring 15 is installed on the outer circumferential surface thereof; and a linkage structure 11 capable of driving the gas compression structure 12 to generate reciprocating motion and simultaneously making the gear ring 15 rotate; when the gas compression structure 12 moves to the middle section of the air compression cavity 3, the part of the medicine adding structure 13 containing the powder medicine just moves to the top of the medicine dropping hole 7.

[0030] Please refer to Figure 3, the linkage structure 11 includes a movable rod 111 and a movable plate 112, the end of the movable rod 111 is fixedly connected with one end face of the gas compression structure 12, one end of the movable rod 111 and the movable plate 112 is flush and connected through a push plate 113, the movable plate 112 is provided with an external tooth structure 114 on the bottom surface close to the other end, the external tooth structure 114 is engaged with the gear ring 15, the circumferential surface of the cylindrical air compression pipeline 1 is provided with a limiting plate 10, the limiting plate 10 is provided with a guide groove for the horizontal movement of the movable plate 112, the movable rod 111 is provided with a limiting hole 5 at the end face of the cylindrical air compression pipeline 1, and the structure radius of the limiting hole 5 is greater than the rod diameter of the movable rod 111.

[0031] Please refer to Figure 4 , the gas compression structure 12 includes a piston plate 121 which can move horizontally along the air compression cavity 3 and is installed at the end of the movable rod 111, the outer circumferential surface of the piston plate 121 is sleeved with a sealing ring 122, the plate body of the piston plate 121 is provided with a plurality of annular array type air holes 123, each air hole 123 is provided with a gas one-way valve 124, the gas one-way valve 124 is installed in the air hole 123, the gas inlet direction of the gas one-way valve 124 is towards the limiting hole 5, and the gas outlet direction is towards the medicine delivery hole 4.

[0032] Please refer to Figure 5 , the medicine adding structure 13 includes a rotary valve 131 placed in the disc-shaped rotary cavity 8, one end face of the rotary valve 131 is fixedly installed with a rotary shaft 132, the shaft body of the rotary shaft 132 penetrates the powder medicine shell 6 and is provided with a one-way rotation structure 14 at the end, the circumferential surface of the rotary valve 131 is provided with a plurality of annular array type medicine storage grooves 133, the arc length between two adjacent medicine storage grooves 133 is less than the horizontal movement length of the piston plate 121, and when the piston plate 121 is close to the limiting hole 5, the top end of the medicine falling hole 7 is located at the complete arc surface of the outer circumferential surface of the rotary valve 131.

[0033] Please refer to Figure 6, the one-way rotation structure 14 includes an outer annular housing 141 installed in the inner ring of the gear ring 15, the inner rotation body 142 is seamlessly installed inside the outer annular housing 141, the center of the inner rotation body 142 is provided with an axle body mounting hole 147 for fixedly mounting the rotating shaft 132, the outer annular housing 141 is provided with a plurality of annular array type semi-annular movable chambers 143 in the middle region of the circumferential surface of the inner rotation body 142, each semi-annular movable chamber 143 is provided with a triangular chamber 144 in the same direction, the inside of each triangular chamber 144 is placed with a triangular abutting block 146 of a corresponding structure, the inside of each semi-annular movable chamber 143 is placed with an annular rubber body 145, one end of the annular rubber body 145 abuts one end face of the triangular abutting block 146 and can generate a certain degree of pressure on the triangular abutting block 146, when the movable plate 112 moves towards the needle tube structure 2, the outer annular housing 141 and the inner rotation body 142 rotate synchronously, otherwise, the outer annular housing 141 rotates while the inner rotation body 142 is in a stationary state.

[0034] In use, the powder medicine is placed in the medicine storage chamber 9, under the action of gravity, part of the powder falls into the corresponding medicine storage groove 133, at this time, the single-handed columnar air compression pipeline 1 is held and the medicine delivery hole is aligned with the patient's periodontitis, the push plate 113 is pushed, at this time, the piston plate 121 compresses the gas inside the region, so that the gas is blown to the patient's inflamed part through the medicine delivery hole 4, which can make the inflamed part dry and expose the virus completely, in the movement process of the piston plate 121, the outer tooth structure 114 and the gear ring 15 cooperate to make the rotating shaft 132 rotate, which drives the rotary valve 131 to rotate, in the rotation process, the medicine storage groove 133 can store the powder medicine falling into it under gravity, when the piston plate 121 moves to the middle of the air compression cavity, the medicine in the medicine storage groove 133 can enter the high-speed flowing air through the medicine falling hole 7 under the action of gravity, and is sprayed to the patient's periodontitis through the medicine delivery hole 4 with the high-speed flowing air, by repeatedly pulling and pushing the push plate 113, different periodontitis parts can be sprayed.

[0035] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application being defined by the appended claims and their equivalents.

Claims

1. A periodontal medication applicator for oral cavity, comprising a cylindrical air compression pipe (1), a needle structure (2) installed at the center of one end face of the cylindrical air compression pipe (1), an air compression chamber (3) disposed inside the cylindrical air compression pipe (1), a medication delivery hole (4) disposed inside the needle structure (2) for allowing airflow, a powdered medication shell (6) disposed above the needle structure (2), a disc-shaped rotating cavity (8) disposed in the middle section inside the powdered medication shell (6), a medication drop hole (7) disposed at the bottom of the disc-shaped rotating cavity (8) and communicating with the medication delivery hole (4), and a medication storage chamber (9) disposed at the top of the disc-shaped rotating cavity (8), characterized in that: It also includes a gas compression structure (12) placed inside the air compression chamber (3) and movable along its axial direction. The gas compression structure (12) is provided with a gas check valve. When it moves toward the needle structure (2), the gas check valve is closed, and vice versa. A dosing structure (13) is rotatably installed inside a disc-shaped rotating cavity (8) and, when rotated, allows a metered amount of drug in the drug storage chamber (9) to enter the drug drop hole (7). The rotating end of the dosing structure (13) extends to one side of the outer periphery of the powdered dosing shell (6). A one-way rotating structure (14) is installed at the rotating end of the dosing structure (13). The one-way rotating structure (14) is a timely braking structure, and a gear ring (15) is installed on the outer circumference. And a linkage structure (11) that can drive the gas compression structure (12) to reciprocate while causing the gear ring (15) to rotate. When the gas compression structure (12) moves to the middle section of the air compression chamber (3), the part of the dosing structure (13) containing the powdered drug just moves to the top of the drug drop hole (7).

2. The oral periodontitis medication applicator according to claim 1, characterized in that: The linkage structure (11) includes a movable rod (111) that extends into the air compression chamber (3) and a movable plate (112). The end of the movable rod (111) is fixedly connected to one end face of the gas compression structure (12). One end of the movable rod (111) and the movable plate (112) are flush and connected by a push plate (113). The movable plate (112) has an external tooth structure (114) on its bottom surface near its other end. The external tooth structure (114) meshes with the gear ring (15).

3. The oral periodontitis medication applicator according to claim 2, characterized in that: A limiting plate (10) is installed on the circumferential surface of the columnar air compression pipe (1), and the limiting plate (10) is provided with a guide groove for the movable plate (112) to move horizontally along it.

4. The oral periodontitis medication applicator according to claim 3, characterized in that: The movable rod (111) has a limiting hole (5) at the end face of the through columnar air compression pipe (1), and the structural radius of the limiting hole (5) is greater than the diameter of the rod body of the movable rod (111).

5. A dental periodontitis medication applicator according to claim 4, characterized in that: The gas compression structure (12) includes a piston plate (121) that can move horizontally along the air compression chamber (3) and has one end face installed at the end of the movable rod (111). A sealing ring (122) is fitted on the outer circumferential surface of the piston plate (121). Multiple annular array-type vent holes (123) are provided in the body of the piston plate (121). A gas one-way valve (124) is installed inside each vent hole (123).

6. A dental periodontitis medication applicator according to claim 5, characterized in that: The gas check valve (124) has its inlet direction facing the limiting hole (5) and its exhaust direction facing the drug delivery hole (4).

7. A dental periodontitis medication applicator according to claim 6, characterized in that: The dosing structure (13) includes a rotary valve (131) placed inside the disc-shaped rotating cavity (8). A rotating shaft (132) is fixedly installed at the center of one end face of the rotary valve (131). The shaft of the rotating shaft (132) passes through the powdered dosing shell (6) and is equipped with a one-way rotating structure (14) at its end. The circumferential surface of the rotary valve (131) is provided with multiple annular array-type drug storage tanks (133).

8. A dental periodontitis medication applicator according to claim 7, characterized in that: The arc length between two adjacent drug storage tanks (133) is less than the horizontally movable length of the piston plate (121), and when the piston plate (121) approaches the limiting hole (5), the top of the drug drop hole (7) is located at the complete arc surface of the outer circumference of the rotary valve (131).

9. A dental periodontitis medication applicator according to claim 8, characterized in that: The unidirectional rotating structure (14) includes an outer annular shell (141) installed on the outer circumference of the gear ring (15) in the inner ring. An inner rotating body (142) that can rotate inside is seamlessly installed in the center of the outer annular shell (141). The center of the inner rotating body (142) is provided with a shaft mounting hole (147) for fixing and installing the rotating shaft (132). The outer annular shell (141) is provided with a plurality of annular array semi-annular active chambers (143) in the middle area of ​​the circumference of the inner rotating body (142). Each semi-annular active chamber (143) is provided with a triangular chamber (144) in the same direction. Each triangular chamber (144) is provided with a triangular abutment block (146) with a corresponding structural shape inside. Each semi-annular active chamber (143) is provided with an annular rubber body (145) inside. One end of the annular rubber body (145) abuts against one end face of the triangular abutment block (146) and can generate a certain degree of pressure on the triangular abutment block (146).

10. A dental periodontitis medication applicator according to claim 9, characterized in that: When the movable plate (112) moves toward the needle structure (2), the outer annular shell (141) and the inner rotating body (142) rotate synchronously. Conversely, the outer annular shell (141) rotates while the inner rotating body (142) remains stationary.

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