Local medicine application device for periodontal treatment

Abstract

The invention discloses a periodontal treatment local medicine application device, and relates to the technical field of periodontal treatment, and the periodontal treatment local medicine application device comprises a medicine delivery unit which comprises a medicine bin, a feeding assembly and a medicine application assembly; the protection unit comprises a tooth support assembly and an adjusting assembly. The oral cavity of a patient can be supported, secondary damage caused by the fact that the patient closes the oral cavity due to stress is prevented, and the adjusting assembly allows the position and the angle of the tooth support to be flexibly adjusted according to the unique oral cavity structure and the treatment requirement of each patient so as to optimize the comfort and the effect in the treatment process. It can be guaranteed that the medicine can cover the whole affected part of the oral cavity without missing any part, and meanwhile the risks of excessive use of the medicine and cross infection are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular, to a local drug application device for periodontal treatment. Background Art

[0002] Oral medicine, as an important branch of stomatology, mainly focuses on the diagnosis and treatment of high-incidence diseases such as dental hard tissue diseases, pulp diseases, periapical diseases, periodontal tissue diseases, and oral mucosal diseases. Among them, periodontal tissue diseases (such as gingivitis and periodontitis) have a high incidence due to their close relationship with eating habits and lifestyle. With the accelerating pace of life, the treatment demand for periodontal diseases is increasing day by day. However, traditional periodontal treatment methods still face many challenges, especially in the local drug application link, and innovative solutions are urgently needed to improve treatment efficiency and patient compliance.

[0003] Currently in clinical practice, local periodontal drug application mostly relies on medical staff to administer drugs by pressing a spraying device or manual operation (such as using forceps to pick up solid tablets). However, periodontal lesion sites are often located in hidden areas such as gingival sulcus and periodontal pocket, and it is difficult to achieve precise drug delivery with traditional methods relying on manual operation. In addition, some drugs (such as fluids containing antibacterial agents or sustained-release fluids) need to maintain local action for a long time, and the fluids are easily lost due to saliva flushing or patient swallowing actions, resulting in insufficient local drug concentration. Repeated drug application is required, increasing the treatment burden and economic cost of patients, and may also cause patients to accidentally swallow and trigger adverse reactions. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is: at the present stage, when applying drugs to periodontal lesion sites, the positioning is poor and the drug waste is serious.

[0005] The above technical problem is solved by the following technical solutions: The present invention provides a local drug application device for periodontal treatment, which includes a drug delivery unit, comprising multiple groups of medicine bins, a feeding component arranged at the end of the medicine bin, and a drug application component arranged at the end of the feeding component; a protection unit, comprising a tooth support component and an adjustment component arranged inside the tooth support component; The medicine bin includes an air chamber and a drug delivery chamber arranged on one side of the air chamber; The feeding component includes a docking buckle, an air pipe arranged inside the docking buckle, and a drug delivery pipe arranged on one side of the air pipe.

[0006] In a preferred embodiment of the local drug application device for periodontal treatment of the present invention: a push rod is further arranged at the tail of the medicine bin; The push rod includes a straight rod piston arranged inside the drug delivery chamber and an elastic piston arranged inside the air chamber.

[0007] In a preferred embodiment of the local drug application device for periodontal treatment according to the present invention: The tooth brace assembly includes an upper dental brace, a lower dental brace disposed at the bottom of the upper dental brace, and a hinge shaft disposed between the upper dental brace and the lower dental brace.

[0008] In a preferred embodiment of the local drug application device for periodontal treatment according to the present invention: The upper dental brace and the lower dental brace have the same structural shape, both being U-shaped grooves; The upper dental brace includes a notch opened at the front end of the upper dental brace, and a plurality of groups of pads disposed at the bottom of the upper dental brace.

[0009] In a preferred embodiment of the local drug application device for periodontal treatment according to the present invention: The adjustment assembly includes expansion tubes respectively clamped at the ends of the upper dental brace and the lower dental brace; The expansion tubes are communicated with the trachea.

[0010] In a preferred embodiment of the local drug application device for periodontal treatment according to the present invention: The drug application assembly includes a snap plate for clamping inside the notch, and a drug application member disposed inside the snap plate.

[0011] In a preferred embodiment of the local drug application device for periodontal treatment according to the present invention: The snap plate includes a sliding groove disposed at the front end of the snap plate; The drug application member includes a plurality of groups of nozzles arrayed and penetrating through the inner side of the body of the snap plate; The nozzle includes a liquid outlet pipe penetrating through the inner side of the snap plate, and a liquid inlet hole protruding from the end of the liquid outlet pipe.

[0012] In a preferred embodiment of the local drug application device for periodontal treatment according to the present invention: The drug delivery pipe includes a snap member disposed at the end of the drug delivery pipe; The snap member includes a snap end, pressing caps protruding from both ends of the snap end, and a cavity disposed inside the snap end.

[0013] In a preferred embodiment of the local drug application device for periodontal treatment according to the present invention: The snap member is slidably and sealingly snapped in the sliding groove, and the cavity is communicated with the liquid inlet hole located inside the cavity.

[0014] In a preferred embodiment of the local drug application device for periodontal treatment according to the present invention: The upper dental brace further includes grooves disposed on both sides of the end of the upper dental brace; The expansion tubes are elastically clamped on both sides of the inner wall of the upper dental brace through the grooves.

[0015] The beneficial effects of the present invention are as follows: It realizes the integration of precise periodontal sealing and targeted drug delivery. Through the controllable expansion of the expansion medium by the adjustment component, a closed chamber highly matching the individual periodontal anatomical shape can be constructed, blocking the flushing of saliva and the interference of swallowing, and ensuring the continuous high-concentration retention of the drug in the target area. The linkage design of the elastic piston and the straight rod piston enables the dynamic coordination of the sealing pressure and the drug output, avoiding the problems of tissue damage or insufficient drug dosage caused by pressure loss in the traditional method. In addition, it supports the patient's oral cavity to prevent secondary injury caused by the patient's stress-induced closure of the oral cavity. The adjustment component allows for flexible adjustment of the position and angle of the dental support according to the unique oral structure and treatment needs of each patient to optimize the comfort and effect during the treatment process. It can also ensure that the drug can cover the entire oral lesion area without missing any part, while avoiding the risks of overuse of drugs and cross-infection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present invention and do not limit the present invention. Among them: Figure 1 Shows the overall structural schematic diagram of the local drug application device for periodontal treatment of the present invention; Figure 2 Shows the top view of the structure of the local drug application device for periodontal treatment of the present invention; Figure 3 Shows Figure 2 The cross-sectional view of the feeding component structure at F-F; Figure 4 Shows Figure 3 The internal structure schematic diagram of the upper dental appliance at A in; Figure 5 Shows Figure 2 The cross-sectional view of the clamping relationship of the drug delivery tube at E-E; Figure 6 Shows Figure 5 The enlarged view of the buckle structure at B in; Figure 7 Shows the exploded schematic diagram of the structure of the local drug application device for periodontal treatment of the present invention; Figure 8 Shows Figure 7 The structural schematic diagram of the clamping relationship between the expansion tube and the upper dental appliance at C in.

[0017] In the figure: 1. Administration unit; 2. Protection unit; 11. Medicine bin; 12. Feeding component; 13. Medicine application component; 21. Dental brace component; 22. Adjustment component; 31. Push rod; 111. Air chamber; 112. Medicine administration chamber; 121. Docking buckle; 122. Air pipe; 123. Medicine administration pipe; 131. Buckle plate; 132. Medicine application part; 211. Upper dental brace; 212. Lower dental brace; 213. Hinge shaft; 221. Expansion pipe; 311. Straight rod piston; 312. Elastic piston; 1231. Buckle part; 1311. Sliding groove; 1321. Nozzle; 2111. Notch; 2112. Pad; 2113. Groove; 13211. Liquid outlet pipe; 13212. Liquid inlet hole; 12311. Buckle end; 12312. Pressing cap; 12313. Cavity. Detailed implementation manners

[0018] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below in conjunction with the detailed implementation manners and the accompanying drawings.

[0019] The terms used in the present invention are those general terms that are currently widely used in the art in consideration of the functions of the present invention. However, these terms can change according to the intentions of those of ordinary skill in the art, precedents, or new technologies in the art. In addition, specific terms can be selected by the applicant, and in this case, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but based on the meanings of the terms and the overall description of the present invention.

[0020] Referring to Figures 1 to 8 , this embodiment provides a local medicine application device for periodontal treatment, including an administration unit 1, which includes multiple groups of medicine bins 11, a feeding component 12 arranged at the end of the medicine bin 11, and a medicine application component 13 arranged at the end of the feeding component 12; A protection unit 2, which includes a dental brace component 21, and an adjustment component 22 arranged inside the dental brace component 21; The medicine bin 11 includes an air chamber 111 and a medicine administration chamber 112 arranged on one side of the air chamber 111; The feeding component 12 includes a docking buckle 121, an air pipe 122 arranged inside the docking buckle 121, and a medicine administration pipe 123 arranged on one side of the air pipe 122.

[0021] In an embodiment provided by the present application, a push rod 31 is further arranged at the tail of the medicine bin 11; The push rod 31 includes a straight rod piston 311 arranged inside the medicine administration chamber 112 and an elastic piston 312 arranged inside the air chamber 111.

[0022] In an embodiment provided by the present application, the dental brace assembly 21 includes an upper dental tray 211, a lower dental tray 212 disposed at the bottom of the upper dental tray 211, and a hinge shaft 213 disposed between the upper dental tray 211 and the lower dental tray 212.

[0023] In this embodiment, the dental brace assembly 21 is sleeved on the upper and lower jaw teeth surfaces of the patient through the upper dental tray 211 and the lower dental tray 212 to achieve stable retention of the device. The adjustment assemblies 22 are respectively fitted in the edge regions of the upper dental tray 211 and the lower dental tray 212. After the patient wears it, the adjustment assemblies 22 generate a radial extrusion effect through the expansion medium filled inside, expanding the closed space formed between the upper dental tray 211 and the corresponding adjustment assembly 22 upward to the upper dental arch surface, thereby constructing an independent upper gingival closed environment; similarly, the coordinated expansion of the lower dental tray 212 and the corresponding adjustment assembly 22 can form a lower gingival closed space. This sealing structure supports injecting liquid medicine into the closed cavity through the upper / lower dental trays, enabling the liquid medicine to fully contact and penetrate into hidden parts such as the gingival sulcus and periodontal pocket. While achieving uniform distribution of the medicine, it effectively blocks the interference of saliva flushing and the patient's swallowing action on the drug concentration.

[0024] It should be particularly noted that a medicine bin 11, a feeding assembly 12, and a medicine application assembly 13 are provided on the outer sides of the upper dental tray 211 and the lower dental tray 212. Among them, the medicine bin 11 transports the medicine to the medicine application assembly 13 through the feeding assembly 12 by pump pressure, and releases it directionally to the inner wall surfaces of the upper dental tray 211 and the lower dental tray 212 through its penetration structure, ultimately achieving the continuous soaking effect of the medicine on the periodontal tissue. In addition, the medicine bin 11 can also pump the expansion medium to the feeding assembly 12 by pump pressure, driving the adjustment assemblies 22 to expand and closely adhere to the gums, strengthening the sealing between the upper / lower dental trays and the dental arch, and ensuring the independence and controllability of the treatment area.

[0025] Preferably, both the upper dental tray 211 and the lower dental tray 212 are manufactured by 3D printing technology, and the material used is medical-grade transparent plastic. This material not only has good biocompatibility and adaptability, but its light-transmitting characteristics can also assist medical staff in observing the periodontal medicine application status and drug distribution in real time, providing a visual basis for the evaluation of the treatment effect.

[0026] In this embodiment, a hinge shaft 213 is provided between the upper dental tray 211 and the lower dental tray 212. The hinge shaft 213 can be set to a fixed opening or a movable opening according to the patient's usage requirements to prevent secondary injury caused by the patient's stress-induced closure of the oral cavity.

[0027] In this embodiment, the medicine storage chamber 11 is composed of an air chamber 111 and a medicine delivery chamber 112 arranged in parallel. The two form independent chambers through a partition plate. The feeding assembly 12 includes a docking buckle 121, a trachea 122 nested inside it, and a medicine delivery tube 123 fitted on the other side of the docking buckle. Among them, the trachea 122 is connected to the air chamber 111 through a plug-in interface, and the medicine delivery tube 123 also establishes a fluid channel with the medicine delivery chamber 112 through a plug-in structure to achieve the directional transmission of the liquid medicine and the expansion medium.

[0028] Preferably, an elastic piston 312 is slidably fitted inside the air chamber 111, and a straight rod piston 311 is fitted inside the medicine delivery chamber 112. The two are integrated into one body through a rigid connecting piece to jointly form a push rod 31. The push rod 31 enables the external force input to synchronously drive the movement of the elastic piston 312 and the straight rod piston 311 through a single operation: when pressure is applied to the push rod 31 along the axial direction, the elastic piston 312 compresses the gas medium in the air chamber 111, and the straight rod piston 311 pushes the liquid medicine in the medicine delivery chamber 112, and they are respectively output to the target area through the trachea 122 and the medicine delivery tube 123.

[0029] In specific operation, the double-tube end of the medicine storage chamber 11 needs to be inserted into the matching interface of the docking buckle 121, so as to establish a complete flow path of the trachea 122 - air chamber 111 and the medicine delivery tube 123 - medicine delivery chamber 112. Through the cooperative pumping action of the push rod 31, on the one hand, the expansion medium can be injected into the adjusting assembly 22 to strengthen the sealing effect of the upper and lower gums, and on the other hand, the treatment drug can be accurately injected into the cavity sealed by the dental appliance, realizing the synchronous isolation and targeted drug delivery of the diseased area, and significantly improving the treatment efficiency and safety.

[0030] When the adjusting assembly 22 continuously pressurizes through the expansion medium until the contact surface with the gum tissue reaches the physical limit, its radial expansion force will trigger the axial compression deformation of the elastic piston 312. This design ensures that the drug delivery rate adapts to the change of the periodontal pocket volume. This dynamic feedback adjustment mechanism effectively avoids the problems of pressure overload or insufficient dosage that may be caused by traditional manual drug delivery.

[0031] In summary, through the setting of the drug delivery unit 1 and the protection unit 2, the device realizes the integration of precise periodontal sealing and targeted drug delivery. Through the controllable expansion of the adjusting assembly 22 through the expansion medium, a closed chamber highly matching the individual periodontal anatomical shape can be constructed, blocking the flushing of saliva and swallowing interference, and ensuring the continuous high-concentration retention of the drug in the target area. The linkage design of the elastic piston 312 and the straight rod piston 311 enables the sealing pressure and the drug output to be dynamically coordinated, avoiding the problems of tissue damage or insufficient drug dosage caused by pressure out-of-control in the traditional method.

[0032] In addition, the patient's oral cavity is supported to prevent secondary injury caused by the patient's stress-induced oral cavity closure. The adjustment component 22 allows for flexible adjustment of the position and angle of the dental support according to the unique oral structure and treatment needs of each patient, so as to optimize the comfort and effect during the treatment process. It can also ensure that the drug can cover the entire affected area of the oral cavity without missing any part, while avoiding the risks of overuse of drugs and cross-infection.

[0033] Referring to Figures 1~8 , as an alternative embodiment, the upper dental tray 211 and the lower dental tray 212 have the same structural shape, both being U-shaped grooves; The upper dental tray 211 includes a notch 2111 opened at the front end of the upper dental tray 211, and a plurality of groups of pads 2112 provided at the bottom of the upper dental tray 211.

[0034] In an embodiment provided by the present application, the adjustment component 22 includes expansion tubes 221 respectively clamped at the ends of the upper dental tray 211 and the lower dental tray 212; The expansion tube 221 is communicated with the trachea 122.

[0035] In an embodiment provided by the present application, the medicine application component 13 includes a snap plate 131 for clamping inside the notch 2111, and a medicine application member 132 provided inside the snap plate 131.

[0036] In an embodiment provided by the present application, the snap plate 131 includes a sliding groove 1311 provided at the front end of the snap plate 131; The medicine application member 132 includes a plurality of groups of nozzles 1321 arrayed and penetrating through the inner side of the body of the snap plate 131; The nozzle 1321 includes a liquid outlet pipe 13211 penetrating through the inside of the snap plate 131, and a liquid inlet hole 13212 protruding from the end of the liquid outlet pipe 13211.

[0037] In this embodiment, the upper dental tray 211 and the lower dental tray 212 adopt a unified U-shaped groove structure design, and their open ends can be stably clamped on the surfaces of the patient's upper and lower jaw teeth, and personalized wearing is realized by adapting to different sizes and models. This standardized structure not only ensures the universality of the device, but also can meet the needs of individual oral morphological differences through model adjustment.

[0038] As Figure 4 and Figure 5 shown, the upper dental tray 211 is provided with notches 2111 distributed circumferentially on the outer arc edge, and this notch structure provides an embedded installation space for the snap plate 131, thereby constructing the basic framework of the drug delivery channel. At the same time, pads 2112 with biocompatibility are provided at the bottom of the upper dental tray 211 to maintain the stability of tooth arrangement through mechanical support. Correspondingly, the lower dental tray 212 is also configured with a notch structure and a support pad assembly with the same function.

[0039] Preferably, the adjusting component 22 is composed of an elastic expansion tube 221 sleeved on the inner arc edges of the upper dental tray 211 and the lower dental tray 212. The expansion tube 221 is assembled around the inner arc edge area of the dental tray. The pressurized gas from the air chamber 111 is transported to the inner cavity of the expansion tube 221 through the air pipe 122, prompting the tube body to produce a controllable flexible expansion deformation, enabling the inner wall of the dental tray to form a dynamic fitting state with the patient's dentition, and significantly improving the wearing comfort and fixation effect.

[0040] The buckle plate 131 is internally provided with a medicine application component 132, which integrates multiple groups of nozzles 1321 on the inner side of the plate structure through a hot melt process. Among them, the liquid outlet pipe 13211 of the nozzle 1321 is completely embedded in the inner layer of the buckle plate, while the funnel-shaped liquid inlet hole 13212 extends to the outer surface to ensure that a fluid passage can be continuously established during the sliding process of the buckle 1231. This gradient diversion structure effectively improves the liquid delivery efficiency and uniformity. It should be noted that the liquid outlet port of the nozzle assembly is optimized in orientation design, and the axis of its tube head is strictly aligned with the target gingival root area. This precise positioning mechanism combined with the nozzle array arrangement can achieve the three-dimensional penetration and diffusion of drug molecules in the subgingival area, significantly enhancing the local drug delivery effect.

[0041] In an embodiment provided by the present application, the medicine delivery tube 123 includes a buckle 1231 provided at the end of the medicine delivery tube 123; The buckle 1231 includes a buckle end 12311, pressing caps 12312 convexly provided at both ends of the buckle end 12311, and a cavity 12313 provided inside the buckle end 12311.

[0042] In an embodiment provided by the present application, the buckle 1231 is slidably and sealingly buckled in the sliding groove 1311, and the cavity 12313 communicates with the liquid inlet hole 13212 located inside the cavity 12313.

[0043] In this embodiment, as Figure 5 and Figure 6 shown, the buckle 1231 can buckle the medicine delivery tube 123 in the sliding grooves 1311 on the upper and lower surfaces of the buckle plate 131 to achieve a sliding connection. The buckle 1231 is an elastic buckle plate, which is convenient for adapting to the U-shaped shape of the upper dental tray 211 or the lower dental tray 212, and the buckle end 12311 can be tightly clamped in the sliding groove 1311. Pressing caps 12312 are convexly provided on the outer sides of the upper and lower groups of buckle ends 12311. By pressing the pressing caps 12312, the clamping mouth of the buckle end 12311 can be opened and closed, thereby achieving the purpose of embedding the buckle end 12311 in the sliding groove 1311.

[0044] In addition, a cavity 12313 is reserved inside the buckle end 12311 and the pressing cap 12312. The cavity 12313 elastically and closely fits on the outer arc surface of the buckle plate 131, and the cavity 12313 communicates with the drug delivery tube 123. When the buckle end 12311 is buckled on a sliding groove 1311 of a certain section of the buckle plate 131 through the pressing cap 12312, the liquid inlet hole 13212 inside this section of the buckle plate 131 is wrapped inside the cavity 12313 and will communicate with the cavity 12313. Drugs are pumped into the cavity 12313 through the drug delivery tube 123, and then the liquid is supplied from the cavity 12313 to the liquid inlet hole 13212, and finally sprayed onto the affected area of the patient through the liquid outlet tube 13211. In addition, the accumulation effect of the cavity 12313 can form a pressurizing effect, improve the drug spraying intensity, and thus enhance the drug dripping effect.

[0045] During use, after the patient wears the dental brace assembly 21 first, the buckle end 12311 is buckled on the periodontal lesion area to be treated through the pressing cap 12312 by using the buckle member 1231. Then, air and drugs are respectively injected into the two chambers of the medicine storage 11 by pulling up the push rod 31. The port of the medicine storage 11 is inserted into the docking buckle 121 to establish a complete flow path between the trachea 122 - air chamber 111 and the drug delivery tube 123 - medicine storage 112. Then, the push rod 31 is pushed to simultaneously squeeze the medicine storage 11 by the straight rod piston 311 and the elastic piston 312, so as to inject gas from the trachea 122 into the expansion tube 221 to make it expand and fit the dental arch; it also realizes pumping drugs from the drug delivery tube 123 into the cavity 12313, and then from the cavity 12313 to the liquid inlet hole 13212 - liquid outlet tube 13211, and accurately spray to the affected area at the root of the gum, so as to realize synchronous isolation and targeted drug delivery in the lesion area. During this process, when the expansion of the expansion tube 221 is restricted, the elastic piston 312 will be elastically compressed to meet the requirements of synchronous isolation and targeted drug delivery in the lesion area.

[0046] In summary, after the buckle end 12311 of the present device is embedded in the specified position, the directional liquid outlet of the nozzle 1321 is aligned with the root of the gum, and the treatment device can be accurately positioned at the target periodontal lesion area, thereby forming a straight transmission path from the drug storage to the microenvironment of the affected area, significantly improving the drug action targeting. In addition, the dual-channel trachea 122 + drug delivery tube 123 realizes synchronous control of physical isolation and drug delivery. When the expansion tube 221 is controlled to expand to form a closed treatment chamber, it not only constructs a physical barrier to prevent healthy tissues from contacting drugs, but also clears pathogenic factors in the gingival sulcus through negative pressure adsorption, creating an ideal microenvironment for the drug to exert the maximum efficacy.

[0047] Refer to Figures 7 to 8 , as an alternative embodiment, the upper dental brace 211 further includes grooves 2113 provided on both sides of the end of the upper dental brace 211; The expansion tube 221 is elastically clamped on both sides of the inner wall of the upper dental brace 211 through the grooves 2113.

[0048] In this embodiment, a groove structure 2113 is provided in the root area of the upper dental appliance 211 and the lower dental appliance 212. The groove is designed with a standard U-shaped cross-section and extends longitudinally along the dental appliance to form a continuous embedding channel. By precisely clamping the elastic expansion tube 221 in the grooves on both sides, the directional positioning of the tube body on the inner arc side of the dental appliance can be achieved, enabling the expansion tube 221 to maintain uniform elastic tension under a compressed state. This mechanical limit design not only ensures the axial stability of the expansion tube but also provides a basis for controllable deformation for subsequent pneumatic adjustment. In addition, it is also convenient for medical staff to replace and clean in the later stage.

[0049] Finally, it should be pointed out that the methods and devices described in detail above are only embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A local medication device for periodontal treatment, characterized in that: include, A drug delivery unit (1) comprising a plurality of drug bins (11), a feeding assembly (12) arranged at the end of the drug bins (11), and a drug application assembly (13) arranged at the end of the feeding assembly (12); A protection unit (2) comprising a tooth support component (21) and an adjustment component (22) arranged inside the tooth support component (21); The medicine bin (11) comprises an air bin (111) and a medicine administration bin (112) arranged on one side of the air bin (111); The feeding assembly (12) comprises a docking buckle (121), an air tube (122) arranged inside the docking buckle (121), and a drug delivery tube (123) arranged on one side of the air tube (122).

2. The periodontal treatment local applicator according to claim 1, characterized in that: A push rod (31) is also provided at the rear of the medicine bin (11); The push rod (31) comprises a straight rod piston (311) arranged inside the medication chamber (112), and an elastic piston (312) arranged inside the gas chamber (111).

3. The periodontal treatment local applicator according to claim 2, characterized in that: The dental brace assembly (21) comprises an upper dental brace (211), a lower dental brace (212) arranged at the bottom of the upper dental brace (211), and a hinge shaft (213) arranged between the upper dental brace (211) and the lower dental brace (212).

4. The periodontal treatment local applicator according to claim 3, characterized in that: The upper brace (211) and the lower brace (212) have the same structural shape, both of which are U-shaped grooves; The upper brace (211) comprises a notch (2111) opened at the front end of the upper brace (211), and a plurality of groups of pads (2112) arranged at the bottom of the upper brace (211).

5. The periodontal treatment local applicator according to claim 4, characterized in that: The adjustment assembly (22) comprises an expansion tube (221) respectively clamped on the end of the upper brace (211) and the end of the lower brace (212); The expansion pipe (221) is in communication with the air pipe (122).

6. The periodontal treatment local applicator according to claim 5, characterized in that: The dressing assembly (13) comprises a snap plate (131) for snapping onto the inner side of the notch (2111), and a dressing piece (132) arranged on the inner side of the snap plate (131).

7. The periodontal treatment local applicator according to claim 6, characterized in that: The snap plate (131) comprises a sliding groove (1311) arranged at the front end of the snap plate (131); The dressing piece (132) comprises a plurality of groups of nozzles (1321) arranged in an array on the inner side of the buckle plate (131); The nozzle (1321) comprises a liquid outlet pipe (13211) penetrating the inner side of the snap plate (131), and a liquid inlet hole (13212) protruding from the end of the liquid outlet pipe (13211).

8. The periodontal treatment local applicator according to claim 7, characterized in that: The drug delivery tube (123) comprises a buckle (1231) arranged at the end of the drug delivery tube (123); The buckle part (1231) comprises a buckle end (12311), a pressing cap (12312) protruding from both ends of the buckle end (12311), and a cavity (12313) arranged inside the buckle end (12311).

9. The periodontal treatment local applicator according to claim 8, characterized in that: The snap-fitting member (1231) is slidably and sealingly snap-fitted in the sliding groove (1311), and the cavity (12313) is in communication with the liquid inlet hole (13212) located inside the cavity (12313).

10. The periodontal treatment local applicator according to claim 9, characterized in that: The upper brace (211) further comprises grooves (2113) arranged on both sides of the end of the upper brace (211); The expansion tube (221) is elastically clamped on both sides of the inner wall of the upper brace (211) through the groove (2113).

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