Dosing device for periodontitis treatment

Abstract

The invention discloses an administration device for periodontitis treatment. The administration device comprises a steering assembly, a lip-cheek assembly, an administration assembly, a fixing assembly and a bending assembly, the front end of the steering assembly is provided with the lip-cheek assembly; the fixing assembly is arranged at the upper end of the dosing assembly; the dosing assembly comprises a medicine storage tube, a piston head, a piston rod, a dosing plate, a dosing rack, a dosing shaft, a dosing gear and a dosing pulley; a piston head is slidably connected into the medicine storage tube; piston rods are fixedly connected to the front ends of the piston heads; the front end of the piston rod is detachably connected with the dosing plate; dosing racks are symmetrically arranged on two sides of the upper end of the dosing plate; a dosing gear is arranged at the upper end of the dosing rack; the dosing gear is fixedly connected with a dosing shaft; two ends of the dosing shaft are rotatably connected with the steering assembly, and a dosing pulley is arranged in the middle; in the dosing process, a medical worker or a patient only needs to observe the scales on the control block, and the dosing amount can be accurately controlled.

Description

Technical Field

[0001] The present invention belongs to the technical field of periodontitis treatment, and specifically relates to a drug delivery device for periodontitis treatment. Background Art

[0002] Periodontitis is a common and highly prevalent oral disease, mainly caused by microorganisms in dental plaque. Its course is usually chronic, not only causing gingival swelling, bleeding, and pain, but also gradually destroying the periodontal tissue, leading to tooth loosening or even tooth loss, seriously affecting the oral health and quality of life of patients. In the treatment process of periodontitis, drug treatment plays a key role. However, there are many significant problems with the current drug delivery methods.

[0003] In the prior art, traditional oral drug delivery devices, such as simple syringes, droppers, etc., can hardly provide accurate dose indication for medical staff or patients themselves, which may lead to insufficient drug use and inability to effectively inhibit inflammation, or excessive drug use and drug waste. At the same time, most of the existing drug delivery tubes are usually straight. In actual operation, in order to deliver the drug to the bottom of the periodontal pocket and various hidden lesion corners, medical staff have to forcibly bend or twist the tube, which is not only extremely inconvenient to operate, reduces the treatment efficiency, but also frequent bending easily causes creases or even breaks in the tube.

[0004] Therefore, in view of the above technical problems, the present solution proposes a drug delivery device for periodontitis treatment. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention designs a drug delivery device for periodontitis treatment. By setting a drug delivery component and scales on the control block, the drug dosage can be accurately seen by observing the scales during drug delivery, ensuring the accuracy of drug delivery. At the same time, by setting a bending component at the front end of the drug storage tube, the bevel gear is driven to rotate by a bending motor, thereby driving the front liquid outlet head to bend, and flexibly adjusting according to the drug delivery position.

[0006] To achieve the above technical effects, the present invention is realized through the following technical solutions: A drug delivery device for periodontitis treatment, comprising: a steering component, a labial and buccal component, a drug delivery component, a fixing component, and a bending component.

[0007] The labial and buccal component is arranged at the front end of the steering component, and the drug delivery component is arranged at the upper end; the fixing component is arranged at the upper end of the drug delivery component, and the bending component is arranged at the front end.

[0008] The dosing component includes a medicine storage tube, a piston head, a piston rod, a dosing plate, a dosing rack, a dosing shaft, a dosing gear, and a dosing pulley; the piston head is slidably connected inside the medicine storage tube; the front end of the piston head is fixedly connected to the piston rod; the front end of the piston rod is detachably connected to the dosing plate; dosing racks are symmetrically arranged on both sides of the upper end of the dosing plate; a dosing gear is arranged at the upper end of the dosing rack; the dosing gear is fixedly connected to the dosing shaft; both ends of the dosing shaft are rotatably connected to a steering component, and a dosing pulley is arranged in the middle;

[0009] Further, the steering component includes a housing, a steering worm, a positioning block, a steering knob, a steering worm gear, a steering column, and a control block; a steering worm gear is arranged at the bottom of the housing, and positioning blocks are arranged on both sides and rotatably connected to the steering worm; the front end of the steering worm penetrates the housing and is provided with the steering knob; the upper end of the steering worm gear penetrates the housing and is provided with the steering column fixedly connected to the control block;

[0010] Further, a round hole is opened at the lower end of the control block and slidably connected to the medicine storage tube, a chute is opened at the upper end and slidably connected to the dosing rack, the front ends of the upper chute on both sides are rotatably connected to the dosing shaft, a groove is opened in the middle of the top and provided with the dosing pulley, and a scale is arranged on one side;

[0011] Further, the buccal component includes buccal pieces, spreading rods, limiting pieces, spreading knobs, spreading screws, positioning seats, and limiting plates; limiting plates are symmetrically arranged up and down at the front end of the housing, and a positioning seat is arranged in the middle; limiting pieces are arranged in the middle of the spreading rods and rotatably connected to the positioning seat, and spreading screws are symmetrically arranged on both sides and threadedly connected to the buccal pieces; a spreading knob is arranged on one side of the spreading screw;

[0012] Further, the thread pitches of the spreading screws on both sides of the spreading rod are the same, and the thread rotation directions are opposite;

[0013] Further, the fixing component includes a fixing knob, an extrusion ring, an extrusion column, and an extrusion groove; a hole is opened at the rear end of the control block and movably connected to the extrusion column; the front end of the extrusion column extends out of the control block and is threadedly connected to the fixing ring, and an extrusion groove is opened in the middle and is tangent to the medicine storage tube; fixing knobs are arranged on both sides of the fixing ring;

[0014] Further, the bending component includes a bending bracket, a bending motor, a power rod, bevel gears, a liquid outlet pipe, an L-shaped rod, and a liquid outlet head; the rear end of the liquid outlet pipe is communicated with the medicine storage tube, a bending bracket is arranged on one side and fixedly connected to the bending motor, and a liquid outlet head is arranged at the front end; a power rod is arranged at the front end of the bending motor and fixedly connected to the bevel gear; a bending bracket is arranged on one side of the liquid outlet head and fixedly connected to the L-shaped rod; the rear end of the L-shaped rod is fixedly connected to another bevel gear;

[0015] Further, a soft connection is arranged at the connection between the liquid outlet pipe and the liquid outlet head.

[0016] The beneficial effects of the present invention are:

[0017] In the present invention, a medicine storage tube is paired with a control block with scales. During the medicine administration process, medical staff or patients only need to observe the scales on the control block to accurately control the dosage of the administered medicine, effectively avoiding the problems of under - dosing or over - dosing caused by the lack of accurate dosage indication in traditional medicine - administering devices.

[0018] Meanwhile, by driving the bevel gear to rotate through the bending motor, and then driving the liquid outlet head to bend as needed, it can be flexibly adjusted according to the oral anatomical structure of different patients and the specific position and shape of the periodontal pocket, ensuring that the medicine is accurately delivered to the bottom of the periodontal pocket and various hidden lesion corners, greatly improving the targeted delivery efficiency of the medicine and avoiding the waste or accumulation of the medicine in non - lesion areas.

[0019] Finally, by rotating the steering knob and using the transmission cooperation of the steering worm and the steering worm gear, the control block and the connected medicine - administering assembly are driven to turn flexibly, facilitating the administration of medicine to the periodontitis lesions in different parts of the oral cavity. The operation process is smooth, efficient, and saves treatment time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below.

[0021] Figure 1 is an overall structural schematic diagram of a medicine - administering device for treating periodontitis;

[0022] Figure 2 is an internal structural schematic diagram of the steering assembly of a medicine - administering device for treating periodontitis;

[0023] Figure 3 is an internal structural schematic diagram of the medicine storage tube of a medicine - administering device for treating periodontitis;

[0024] Figure 4 is a structural schematic diagram of the medicine - administering assembly of a medicine - administering device for treating periodontitis;

[0025] Figure 5 is a structural schematic diagram of the fixing assembly of a medicine - administering device for treating periodontitis;

[0026] Figure 6 is a partial structural schematic diagram of the bending assembly of a medicine - administering device for treating periodontitis;

[0027] In the drawings, the list of components represented by each mark is as follows:

[0028] 1 - Steering assembly, 101 - Housing, 102 - Steering worm, 103 - Positioning block, 104 - Steering knob, 105 - Steering worm gear, 106 - Steering column, 107 - Control block, 2 - Lip and cheek assembly, 201 - Lip and cheek piece, 202 - Spreading rod, 203 - Limiting piece, 204 - Spreading knob, 205 - Spreading screw rod, 206 - Positioning seat, 207 - Limiting plate, 3 - Medication delivery assembly, 301 - Medication storage tube, 302 - Piston head, 303 - Piston rod, 304 - Medication delivery plate, 305 - Medication delivery rack, 306 - Medication delivery shaft, 307 - Medication delivery gear, 308 - Medication delivery pulley, 4 - Fixing assembly, 401 - Fixing knob, 402 - Extrusion ring, 403 - Extrusion column, 404 - Extrusion groove, 5 - Bending assembly, 501 - Bending bracket, 502 - Bending motor, 503 - Power rod, 504 - Bevel gear, 505 - Liquid outlet pipe, 506 - L-shaped rod, 507 - Liquid outlet head. Detailed implementation mode

[0029] The present invention discloses a periodontitis treatment and medication delivery device, including: a steering assembly 1, a lip and cheek assembly 2, a medication delivery assembly 3, a fixing assembly 4, and a bending assembly 5; the lip and cheek assembly 2 is arranged at the front end of the steering assembly 1, and the medication delivery assembly 3 is arranged at the upper end; the fixing assembly 4 is arranged at the upper end of the medication delivery assembly 3, and the bending assembly 5 is arranged at the front end; the medication delivery assembly 3 includes a medication storage tube 301, a piston head 302, a piston rod 303, a medication delivery plate 304, a medication delivery rack 305, a medication delivery shaft 306, a medication delivery gear 307, and a medication delivery pulley 308; the piston head 302 is slidably connected to the inside of the medication storage tube 301; the front end of the piston head 302 is fixedly connected to the piston rod 303; the front end of the piston rod 303 is detachably connected to the medication delivery plate 304; the medication delivery rack 305 is symmetrically arranged on both sides of the upper end of the medication delivery plate 304; the medication delivery gear 307 is arranged at the upper end of the medication delivery rack 305; the medication delivery gear 307 is fixedly connected to the medication delivery shaft 306; both ends of the medication delivery shaft 306 are rotatably connected to the steering assembly 1, and a medication delivery pulley 308 is arranged in the middle; during the medication delivery process, medical staff or patients only need to observe the scale on the control block 107 to accurately control the dosage of the medication.

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0031] Embodiment 1

[0032] As Figures 1-5As shown in the figure, the drug delivery assembly 3 includes a medicine storage tube 301, a piston head 302, a piston rod 303, a drug delivery plate 304, a drug delivery rack 305, a drug delivery shaft 306, a drug delivery gear 307, and a drug delivery pulley 308. The piston head 302 is slidably connected inside the medicine storage tube 301. The front end of the piston head 302 is fixedly connected to the piston rod 303. The front end of the piston rod 303 is detachably connected to the drug delivery plate 304. The drug delivery racks 305 are symmetrically arranged on both sides of the upper end of the drug delivery plate 304. The drug delivery gear 307 is arranged at the upper end of the drug delivery rack 305. The drug delivery gear 307 is fixedly connected to the drug delivery shaft 306. The two ends of the drug delivery shaft 306 are rotatably connected to the steering assembly 1, and the drug delivery pulley 308 is arranged in the middle.

[0033] The steering assembly 1 includes a housing 101, a steering worm 102, a positioning block 103, a steering knob 104, a steering worm gear 105, a steering column 106, and a control block 107. The steering worm gear 105 is arranged at the bottom of the housing 101, and the positioning blocks 103 are arranged on both sides and rotatably connected to the steering worm 102. The front end of the steering worm 102 penetrates the housing 101 and the steering knob 104 is arranged. The upper end of the steering worm gear 105 penetrates the housing 101 and the steering column 106 is fixedly connected to the control block 107.

[0034] A circular hole is opened at the lower end of the control block 107 for slidably connecting the medicine storage tube 301, a chute is opened at the upper end for slidably connecting the drug delivery rack 305, the drug delivery shafts 306 are rotatably connected to both sides of the front end of the upper chute, a groove is opened in the middle of the top for arranging the drug delivery pulley 308, and a scale is arranged on one side.

[0035] In this embodiment, when administering the drug, rotate the drug delivery pulley 308. The rotation of the pulley drives the drug delivery shaft 306 coaxial with it to rotate synchronously. The rotation of the drug delivery shaft 306 causes the drug delivery gear 307 fixed on it to rotate accordingly. Due to the meshing of the gear and the rack, the rotation of the drug delivery gear 307 drives the drug delivery rack 305 to slide. The sliding of the drug delivery rack 305 drives the drug delivery plate 304 connected to it to move, thereby pushing the piston rod 303 to move steadily forward in the medicine storage tube 301. The piston head 302 applies an extrusion force to the drug, and the drug flows along the medicine storage tube 301, passes through the connected liquid outlet tube 505, and is output from the liquid outlet head 507. By observing the change of the scale, the accuracy of the drug dosage is ensured.

[0036] When the drug delivery angle needs to be adjusted, rotate the steering knob 104. The steering knob 104 drives the connected steering worm 102 to rotate. The steering worm gear 105 starts to rotate under the drive of the steering worm 102, and the connected steering column 106 rotates synchronously. The rotational movement of the steering column 106 is transmitted to the control block 107, thereby driving the entire drug delivery assembly 3 to rotate together.

[0037] In this embodiment, the top of the control block 107 is made of a transparent material.

[0038] In this embodiment, the medicine storage tube 301 and the graduated control block 107 cooperate with each other, enabling medical staff to intuitively and accurately control the moving distance of the piston head 302 in the medicine storage tube 301 according to the scale, thereby accurately determining the dosage of the administered medicine, and effectively avoiding the problems caused by inaccurate dosage in the traditional medicine administration method. Moreover, the rotation of the pulley drives the medicine delivery shaft 306 and the medicine delivery gear 307, and then drives the sliding of the rack, and finally prompts the piston rod 303 to push the piston head 302 to move forward smoothly, making the transmission process stable and accurate, ensuring that the medicine is output evenly and continuously, avoiding the sudden change of the medicine flow rate, further enhancing the accuracy of medicine administration, enabling the medicine to be evenly distributed in the periodontal pocket, and giving full play to the efficacy of the medicine.

[0039] The steering assembly 1 realizes steering through the cooperation of the steering worm 102 and the steering worm wheel 105. When the medical staff rotates the steering knob 104, the direction of the control block 107 and the connected medicine delivery assembly 3 can be accurately adjusted. The front end of the liquid outlet pipe 505 of the device can be accurately aligned with the periodontitis lesion sites at different positions and angles in the oral cavity, such as the corners of the periodontal pocket. In actual treatment, it can ensure that the medicine is accurately delivered to the parts that need to be treated, avoiding the waste of medicine in non-lesion areas, and effectively improving the utilization rate of the medicine and the treatment effect.

[0040] Embodiment 2

[0041] As Figure 1 、 2 shown in 5 and 6, the labial and buccal component 2 includes a labial and buccal piece 201, a spreading rod 202, a limiting piece 203, a spreading knob 204, a spreading screw 205, a positioning seat 206, and a limiting plate 207. Limiting plates 207 are symmetrically arranged up and down at the front end of the outer shell 101, and a positioning seat 206 is arranged in the middle. A limiting piece 203 is arranged in the middle of the spreading rod 202 and is rotatably connected to the positioning seat 206, and spreading screws 205 are symmetrically arranged on both sides and are threadedly connected to the labial and buccal pieces 201. A spreading knob 204 is arranged on one side of the spreading screw 205. The thread pitches of the spreading screws 205 on both sides of the spreading rod 202 are the same, and the thread rotation directions are opposite.

[0042] The fixing component 4 includes a fixing knob 401, a pressing ring 402, a pressing column 403, and a pressing groove 404. A hole is opened at the rear end of the control block 107 to movably connect the pressing column 403. The front end of the pressing column 403 extends out of the control block 107 and is threadedly connected to a fixing ring, and a pressing groove 404 is opened in the middle and is tangent to the medicine storage tube 301. Fixing knobs 401 are arranged on both sides of the fixing ring.

[0043] The bending assembly 5 includes a bending bracket 501, a bending motor 502, a power rod 503, bevel gears 504, a liquid outlet pipe 505, an L-shaped rod 506, and a liquid outlet head 507; the rear end of the liquid outlet pipe 505 is connected to the medicine storage pipe 301, a bending bracket 501 is arranged on one side and fixedly connected to the bending motor 502, and the liquid outlet head 507 is arranged at the front end; the front end of the bending motor 502 is provided with a power rod 503 fixedly connected to the bevel gear 504; a bending bracket 501 is arranged on one side of the liquid outlet head 507 and fixedly connected to the L-shaped rod 506; the rear end of the L-shaped rod 506 is fixedly connected to another bevel gear 504, and a soft connection is arranged at the connection between the liquid outlet pipe 505 and the liquid outlet head 507;

[0044] In this embodiment, by rotating the expansion knob 204, since the expansion screws 205 on both sides of the expansion rod 202 are threadedly connected to the labial and buccal pieces 201, and the thread pitches of the expansion screws 205 on both sides are the same and the rotation directions are opposite, under the rotation of the expansion knob 204, the expansion screws 205 on both sides will drive the labial and buccal pieces 201 to move outward or inward simultaneously, so as to gently expand the oral labial and buccal parts of the patient, ensuring that the two labial and buccal pieces 201 can be expanded synchronously and evenly, avoiding unilateral over-expansion causing discomfort to the patient or damage to the oral cavity;

[0045] When it is necessary to fix the medicine storage pipe 301, the medical staff rotates the fixing knob 401 to drive the fixing ring to rotate. The rotation of the fixing ring will cause the extrusion column 403 to move axially. The extrusion groove 404 in the middle of the extrusion column 403 is tangent to the medicine storage pipe 301. As the extrusion column 403 moves axially, the extrusion groove 404 will gradually approach the medicine storage pipe 301 and apply an extrusion force to the medicine storage pipe 301. When the extrusion force reaches a certain level, the medicine storage pipe 301 is firmly fixed on the control block 107, ensuring that the medicine storage pipe 301 will not be displaced due to the shaking, movement or other external force interference of the device during the drug administration process, so as to ensure that the drug can be accurately and stably delivered from the medicine storage pipe 301;

[0046] When it is necessary to adjust the angle of the liquid outlet head 507 to adapt to the periodontitis lesion sites at different positions, the bending motor 502 is started. The bending motor 502 rotates, and the power rod 503 at its front end will rotate accordingly. The bevel gear 504 fixedly connected to the power rod 503 also rotates. The rotating bevel gear 504 meshes with another bevel gear 504 fixedly connected to the rear end of the L-shaped rod on one side of the liquid outlet head 507. According to the transmission principle of the bevel gear 504, the rotation of the bevel gear 504 on the power rod 503 will drive the bevel gear 504 on the L-shaped rod to rotate. Since the L-shaped rod is connected to the liquid outlet head 507, under the drive of the bevel gear 504, the L-shaped rod will drive the liquid outlet head 507 to perform a bending movement around the soft connection part;

[0047] In this embodiment, the two side buccal pieces 201 can be synchronously and evenly expanded outwards, avoiding the unilateral over-expansion that may occur in the traditional method, reducing the pulling and damage to the oral mucosa and muscles of the patient, and enabling the patient to feel a more gentle and comfortable operation experience during the treatment process;

[0048] The fixing component 4 drives the extrusion column 403 to axially move by rotating the fixing knob 401, so that the extrusion groove 404 exerts an extrusion force on the medicine storage tube 301, thereby firmly fixing the medicine storage tube 301 on the control block 107, ensuring that during the drug administration process, the medicine storage tube 301 will not be displaced due to factors such as the shaking of the device, the movement of the patient's head, or the slight collision during the operation of the medical staff;

[0049] The bending component 5 drives the bevel gear 504 to rotate through the bending motor 502, driving the L-shaped rod connected to the liquid outlet head 507 to move, so that the liquid outlet head 507 bends around the soft connection part. The angle of the liquid outlet head 507 can be precisely adjusted according to the periodontitis lesion sites at different positions and angles in the oral cavity. For periodontal pockets located deep in the oral cavity, between tooth gaps, or at the curved edges of the gums, by flexibly adjusting the bending angle of the liquid outlet head 507, it can ensure that the drug is accurately delivered to the lesion site, avoiding the waste of the drug in non-lesion areas and effectively improving the targeting of drug delivery, thereby enhancing the treatment effect.

[0050] In summary, in the present invention, by matching the medicine storage tube 301 with the control block 107 with scales, during the drug administration process, medical staff or patients only need to observe the scales on the control block 107 to accurately control the drug dosage, effectively avoiding the problems of under-dosage or over-dosage caused by the lack of accurate dosage indication in traditional drug delivery devices;

[0051] At the same time, by driving the bevel gear 504 to rotate through the bending motor 502, and then driving the liquid outlet head 507 to bend as needed, it can be flexibly adjusted according to the oral anatomical structure of different patients and the specific position and shape of the periodontal pocket, ensuring that the drug is accurately delivered to the bottom of the periodontal pocket and each hidden lesion corner, greatly improving the targeting delivery efficiency of the drug and avoiding the waste or accumulation of the drug in non-lesion areas;

[0052] Finally, by rotating the steering knob 104 and utilizing the transmission cooperation between the steering worm 102 and the steering worm gear 105, the control block 107 and the connected drug delivery component 3 are driven to turn flexibly, facilitating the administration of drugs to the periodontitis lesions at different parts in the oral cavity. The operation process is smooth and efficient, saving treatment time.

[0053] The above-described preferred embodiments of the present invention disclosed are only used to help illustrate the present invention. The preferred embodiments do not elaborate on all details and do not limit the invention to the specific embodiments described.

Claims

1. A drug delivery device for treating periodontitis, characterized in that: include: Steering assembly, lip and cheek assembly, drug delivery assembly, fixing assembly, bending assembly; The front end of the steering assembly is provided with a lip-cheek assembly, and the upper end is provided with a medication assembly; the upper end of the medication assembly is provided with a fixing assembly, and the front end is provided with a bending assembly; The dosing assembly includes a drug storage tube, a piston head, a piston rod, a dosing plate, a dosing rack, a dosing shaft, a dosing gear, and a dosing pulley; the inside of the drug storage tube is slidably connected to the piston head; the front end of the piston head is fixedly connected to the piston rod; the front end of the piston rod is detachably connected to the dosing plate; dosing racks are symmetrically arranged on both sides of the upper end of the dosing plate; a dosing gear is arranged on the upper end of the dosing rack; the dosing gear is fixedly connected to the dosing shaft; both ends of the dosing shaft are rotatably connected to the steering assembly, and a dosing pulley is arranged in the middle.

2. A drug delivery device for treating periodontitis according to claim 1, characterized in that: The steering assembly includes a housing, a steering worm, a positioning block, a steering knob, a steering worm wheel, a steering column, and a control block; a steering worm wheel is arranged at the bottom of the housing, and positioning blocks are arranged on both sides to be rotatably connected to the steering worm; the front end of the steering worm penetrates the housing to set the steering knob; the upper end of the steering worm wheel penetrates the housing to set the steering column to be fixedly connected to the control block.

3. A drug delivery device for treating periodontitis according to claim 2, characterized in that: The control block has a circular hole at the lower end for sliding connection to the medicine storage tube, a sliding groove at the upper end for sliding connection to the medicine delivery rack, both sides of the front end of the upper sliding groove for rotation connection to the medicine delivery shaft, a groove at the middle of the top for setting the medicine delivery pulley, and a scale at one side.

4. A drug delivery device for treating periodontitis according to claim 1, characterized in that: The lip and cheek assembly includes a lip and cheek piece, an expansion rod, a limit piece, an expansion knob, an expansion screw, a positioning seat, and a limit plate; the limit plates are symmetrically arranged at the upper and lower front ends of the shell, and a positioning seat is arranged in the middle; a limit piece is arranged in the middle of the expansion rod and rotatably connected to the positioning seat, and expansion screws are symmetrically arranged on both sides to be threadedly connected to the lip and cheek pieces; an expansion knob is arranged on one side of the expansion screw.

5. A drug delivery device for treating periodontitis according to claim 4, characterized in that: The expansion screws on both sides of the expansion rod have the same thread pitch and opposite thread rotation directions.

6. A drug delivery device for treating periodontitis according to claim 1, characterized in that: The fixing assembly includes a fixing knob, an extrusion ring, an extrusion column, and an extrusion groove; a hole is provided at the rear end of the control block to movably connect the extrusion column; the front end of the extrusion column extends out of the control block and is connected to the fixing ring through an external thread, and an extrusion groove is provided in the middle to be tangent to the medicine storage tube; fixing knobs are provided on both sides of the fixing ring.

7. A drug delivery device for treating periodontitis according to claim 1, characterized in that: The bending assembly includes a bending bracket, a bending motor, a power rod, a bevel gear, a liquid outlet pipe, an L-shaped rod, and a liquid outlet head; the rear end of the liquid outlet pipe is connected to the medicine storage tube, a bending bracket is arranged on one side to be fixedly connected to the bending motor, and a liquid outlet head is arranged at the front end; a power rod is arranged at the front end of the bending motor to be fixedly connected to the bevel gear; a bending bracket is arranged on one side of the liquid outlet head to be fixedly connected to the L-shaped rod; the rear end of the L-shaped rod is fixedly connected to another bevel gear.

8. A drug delivery device for treating periodontitis according to claim 7, characterized in that: A soft connection is arranged at the place where the liquid outlet pipe is connected to the liquid outlet head.

Images