Root canal oscillation negative pressure flushing system and method

Abstract

The invention discloses a root canal oscillation negative pressure flushing system and method, and belongs to the technical field of medical instruments. According to the technical scheme, the negative-pressure washing system for root canal oscillation washing comprises a main machine module, a handle module, a negative-pressure washing needle head and a sewage collecting module; the negative pressure flushing needle head is of a dual-channel coaxial structure of a liquid supply channel and a negative pressure back suction channel, the negative pressure flushing needle head is rigidly connected with the handle module, and a vibration conduction assembly is arranged in the handle module; through the integrated design and the dual-channel coaxial structure, the operation process is simplified, the leakage risk is reduced, and it is ensured that liquid supply and negative pressure are synchronous; the liquid medicine is activated in combination with the vibration conduction assembly, the cleaning efficiency is improved, and the device has the advantages of being convenient to operate, reducing leakage risks, ensuring synchronization of liquid supply and negative pressure and improving the cleaning efficiency.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a root canal rinsing negative pressure irrigation system and method. Background Technology

[0002] Root canal treatment is a core method for treating pulpitis and periapical periodontitis. One of its core steps is root canal irrigation, which aims to remove infected tissue, bacteria, and debris from the root canal, laying the foundation for subsequent root canal filling. However, existing root canal irrigation techniques and related equipment have many limitations, making it difficult to meet the clinical needs for efficient, safe, and convenient treatment.

[0003] Traditional root canal irrigation techniques rely heavily on manual operation, which suffers from problems such as high labor intensity, low irrigation efficiency, easy backflow of irrigation solution, and incomplete cleaning of hidden areas of the root canal. It also fails to achieve coordinated activation of the irrigation solution and negative pressure suction, resulting in poor cleaning effects and affecting treatment success rates. Existing negative pressure irrigation systems are mostly modular, requiring separate connections to multiple independent devices for irrigation, negative pressure, and vibration. This is cumbersome to operate, and the asynchronous nature of irrigation and negative pressure backflow can easily lead to problems such as irrigation solution spillage and contaminant residue.

[0004] Meanwhile, the existing ultrasonic rinsing and negative pressure irrigation devices operate independently with poor coordination, failing to achieve synchronized vibration activation and negative pressure suction. This results in insufficient drug activation and difficulty in thoroughly removing biofilm and stubborn contaminants from the root canal walls. Furthermore, the poor needle compatibility and complex structural design of existing devices make them vulnerable to counterfeiting. Additionally, some devices suffer from a single vibration source, fixed parameters, and inconvenient operation, further limiting their clinical application effectiveness.

[0005] In view of the shortcomings of the existing technologies, there is an urgent need for a root canal irrigation system and method that can achieve simultaneous negative pressure aspiration and drug solution vibration activation, is highly adaptable, easy to operate, and can effectively avoid the risk of counterfeiting, so as to solve the pain points of the existing technologies and improve the quality and efficiency of root canal treatment. Summary of the Invention

[0006] The present invention provides a root canal rinsing negative pressure irrigation system and method to solve at least one of the above-mentioned technical problems.

[0007] The technical solution adopted in this invention is as follows: A root canal rinsing negative pressure irrigation system includes a main unit module, a handle module, a negative pressure irrigation needle, and a wastewater collection module. The negative pressure irrigation needle is a dual-channel coaxial structure with an outer wall supply channel and an inner negative pressure suction channel. The negative pressure irrigation needle is rigidly connected to the handle module, which has a built-in vibration transmission component. The main unit module integrates a drug storage unit, a drug supply pump unit, a negative pressure suction unit, a vibration drive unit, and an irrigation speed adjustment unit. The main unit module is sealed to the wastewater collection module. The main unit module enables the linkage control of drug flow rate, negative pressure intensity, and vibration frequency. After the vibration drive unit is activated, the drug supply pump unit and the negative pressure suction unit are activated synchronously, achieving simultaneous negative pressure suction and drug vibration activation.

[0008] Furthermore, this application also proposes that the negative pressure irrigation needle is compatible with all root canal irrigation needle products on the market, including dedicated root canal irrigation needles.

[0009] Furthermore, this application also proposes that after the medication flows out through the supply outlet of the negative pressure flushing needle, it contacts part of the outer wall of the needle and flows along the outer wall of the needle into the root canal.

[0010] Furthermore, this application also proposes that the host module can adjust the flushing speed, negative pressure intensity, and vibration frequency according to the patient's condition to adapt to different clinical treatment needs.

[0011] Furthermore, this application also proposes that the vibration driving unit can generate vibration energy and transmit the vibration to the negative pressure irrigation needle through the vibration transmission component to activate the root canal irrigation solution.

[0012] Furthermore, this application also proposes that the vibration drive unit is selected from one of the following: a pneumatic acoustic wave vibrator, an ultrasonic transducer, a vibration motor, or an electric motor.

[0013] Furthermore, this application also proposes that the front end of the handle module is provided with a quick-release rigid connection base, the connection base being composed of a needle connecting handle and a handle interface seat, and adopting a tapered positioning and snap-locking structure to realize the quick disassembly and assembly and stable connection of the negative pressure flushing needle.

[0014] Furthermore, this application also proposes that the connecting base is configured with a replaceable adapter head, which is adapted to different types of vibration drive units to achieve flexible switching of vibration modes.

[0015] Furthermore, this application also proposes that the liquid storage unit of the host module has a built-in liquid level sensor. When the liquid level in the storage bottle is lower than a preset threshold, the host automatically stops supplying liquid, and the vibration drive unit and the negative pressure suction unit stop working synchronously.

[0016] A negative pressure irrigation method for root canal treatment includes the following steps: S1. Preoperative preparation: Assess root canal specifications and select a suitable negative pressure irrigation needle, and match the vibration source and irrigation parameters. S2, Liquid Supply: The medication flows out through the liquid supply outlet of the negative pressure flushing needle and flows along the outer wall of the needle into the root canal. S3, Negative pressure back suction: Activate the negative pressure suction unit to back suction the contaminated medicine solution through the negative pressure back suction channel inside the needle; S4. Vibration activation: The vibration drive unit is activated, and the vibration is transmitted to the needle through the vibration transmission component of the handle module to activate the root canal irrigation solution. S5. Collaborative control: The main unit module adjusts the flushing speed, negative pressure intensity, and vibration frequency in conjunction with the patient's condition. S6. Postoperative care: Turn off vibration and fluid supply functions, maintain negative pressure operation for a preset time, then disassemble and disinfect.

[0017] Due to the adoption of the above technical solution, the beneficial effects achieved by this invention are as follows: 1. The negative pressure suction and drug solution vibration activation synchronous technology proposed in this application overcomes the drawbacks of the independent operation of each function in the existing technology, and realizes the seamless connection of vibration activation, drug solution supply and negative pressure suction. The drug solution after vibration activation can act on the inner wall of the root canal in time, and the contaminated drug solution can be drawn back in time, which greatly improves the efficiency and thoroughness of root canal cleaning.

[0018] 2. The negative pressure irrigation needle is compatible with all root canal irrigation needles on the market. The vibration drive unit can be selected from various types to meet the treatment needs of different clinical scenarios and conditions, reduce clinical usage costs, and expand the applicability of the equipment.

[0019] 3. Adopting an integrated design, all core functions are integrated into the main unit module, simplifying the operation process and reducing the labor intensity of medical staff; auxiliary designs such as quick-release connection, sealed sewage collection, and liquid level protection further improve the ease of operation, while preventing cross-infection and equipment damage, and ensuring the safety of clinical use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the handle module in a specific embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the handle module in a specific embodiment of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of part A in the middle; Figure 5This is a schematic diagram of the sewage collection module in a specific embodiment of the present invention; Figure 6 This is a schematic diagram of the host module in a specific embodiment of the present invention.

[0021] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0022] In the attached diagram: 1. Main unit module; 2. Handle module; 21. Connecting base; 211. Needle connecting handle; 212. Handle interface seat; 3. Negative pressure flushing needle; 31. Liquid supply channel; 32. Negative pressure back suction channel; 332. Auxiliary suction hole; 4. Wastewater collection module; 41. Wastewater collection bottle; 42. Sealing layer; 5. Vibration transmission component; 6. Medicine storage unit; 7. Medicine pump unit; 8. Negative pressure suction unit; 10. Flushing speed adjustment unit; 11. Piping. Detailed Implementation

[0023] To more clearly illustrate the overall concept of the present invention, a detailed description will be provided below with reference to the accompanying drawings and examples.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0025] Furthermore, in the description of this invention, it should be understood that the terms "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "aspect," "specific example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0028] Traditional root canal irrigation techniques have limitations in removing infections from root canals, including high operational intensity, low efficiency, easy backflow of medication, and incomplete cleaning of hidden areas. Existing negative pressure irrigation systems are mostly separate units, cumbersome to operate, with asynchronous supply and backflow of medication, and lack of vibration activation functionality. Ultrasonic irrigation and negative pressure irrigation equipment are independent, with poor coordination, and the needle material and design also have safety and compatibility issues. There are also shortcomings in wastewater collection sealing, flow rate adjustment accuracy, and vibration transmission efficiency.

[0029] In this regard, refer to Figures 1-6 This application proposes a root canal rinsing negative pressure irrigation system, including a main unit module 1, a handle module 2, a negative pressure irrigation needle 3, and a wastewater collection module 4; the negative pressure irrigation needle 3 is a dual-channel coaxial structure with an outer wall liquid supply channel 31 and an inner negative pressure back suction channel 32, and the negative pressure irrigation needle 3 is rigidly connected to the handle module 2, which has a built-in vibration transmission component 5; the main unit module 1 integrates a drug storage unit 6, a drug supply pump unit 7, a negative pressure suction unit 8, a vibration drive unit, and an irrigation speed adjustment unit 10, and the main unit module 1 and the wastewater collection module 4 are sealed together by a pipeline 11.

[0030] For ease of understanding, the following explains some key terms in this embodiment: A root canal rinsing negative pressure irrigation system refers to a device that integrates the functions of drug supply, negative pressure suction, vibration activation, and wastewater collection required for root canal irrigation into a single unit, so as to achieve convenient operation and synergistic functions.

[0031] Main module 1 refers to the core control and functional integration part of the system, which is responsible for the storage and delivery of the medicine, the generation and regulation of negative pressure, the driving and control of vibration, and the setting and management of overall flushing parameters.

[0032] Handle module 2 is a component that the operator holds and applies directly to the patient's root canal. It integrates a vibration transmission mechanism and is connected to the negative pressure irrigation needle 3 to achieve drug delivery, back suction of waste, and transmission of vibration energy.

[0033] The negative pressure irrigation needle 3 is a tool that is directly inserted into the root canal for irrigation and suction. It is designed with a dual-channel structure with both fluid supply and back suction functions to ensure effective delivery of irrigation fluid and timely removal of contaminants.

[0034] Wastewater collection module 4 refers to a device used to collect waste liquid and contaminants generated during root canal flushing. It typically includes a collection container and corresponding connecting pipes 11 to prevent cross-infection and environmental pollution.

[0035] The dual-channel coaxial structure of the outer wall supply channel 31 and the internal negative pressure backflow channel 32 means that the negative pressure irrigation needle 3 has two independent channels on the same axis. One channel is located on the outer wall of the needle and is used to deliver irrigation solution into the root canal; the other channel is located inside the needle and is used to backflow waste fluid and contaminants from the root canal using negative pressure. This coaxial design helps to achieve simultaneous supply of solution to the apical negative pressure zone and negative pressure backflow.

[0036] Vibration transmission component 5 refers to the mechanism inside the handle module 2 that transmits the mechanical vibration energy generated by the vibration drive unit to the negative pressure irrigation needle 3 to activate the irrigation solution and enhance its removal of contaminants from the root canal wall.

[0037] The medication storage unit 6 refers to the container inside the main module 1 used to store the medication required for root canal irrigation, which can usually hold a variety of different types of irrigation solutions.

[0038] The drug supply pump unit 7 refers to the pumping device in the main module 1 used to deliver the drug solution in the drug solution storage unit 6 to the negative pressure flushing needle 3, and its flow rate can be adjusted.

[0039] The negative pressure suction unit 8 refers to the device in the main module 1 that generates negative pressure and transmits it to the internal channel of the negative pressure flushing needle 3 to achieve effective back suction of waste liquid and contaminants in the root canal.

[0040] The vibration drive unit refers to the device in the main module 1 used to generate mechanical vibration energy, which is transmitted to the negative pressure flushing needle 3 through the vibration transmission component 5 to activate the flushing solution.

[0041] The flushing speed adjustment unit 10 refers to the control interface or mechanism on the main unit module 1 used to adjust flushing parameters such as liquid supply flow rate, negative pressure suction intensity, and vibration frequency.

[0042] This application provides a root canal rinsing negative pressure irrigation system, the structural design of which aims to improve the efficiency and safety of root canal treatment.

[0043] The system of this application includes a main unit module 1, a handle module 2, a negative pressure irrigation needle 3, and a wastewater collection module 4. The negative pressure irrigation needle 3 adopts a dual-channel coaxial structure with an outer wall supply channel 31 and an internal negative pressure backflow channel 32. This dual-channel coaxial structure is the basis for achieving simultaneous negative pressure suction and drug supply, ensuring stable delivery of the drug to the root canal while allowing contaminants and waste fluids within the root canal to be promptly backflowed through the internal negative pressure backflow channel 32, effectively preventing backflow and spillage that could affect clinical safety. The negative pressure irrigation needle 3 and the handle module 2 are rigidly connected. This rigid connection design minimizes vibration energy loss and ensures efficient transmission of vibration energy to the needle, providing reliable structural support for drug vibration activation. The handle module 2 has a built-in vibration transmission component 5, which acts as a carrier of vibration energy, accurately and efficiently transmitting the vibration energy generated by the vibration drive unit of the main unit module 1 to the negative pressure irrigation needle 3, ensuring effective drug activation. The main unit module 1 integrates a drug storage unit 6 and a drug delivery pump unit 7. The system integrates the negative pressure suction unit 8, vibration drive unit, and irrigation speed adjustment unit 10, achieving integrated control of all core functions. This completely solves the drawbacks of existing split-type equipment, which requires multiple pipelines 11 for connection, is cumbersome to operate, and has poor coordination, making it easier for medical staff to operate and manage. The main unit module 1 and the wastewater collection module 4 adopt a sealed connection method, which can ensure the stability of the negative pressure environment inside the system, while effectively preventing wastewater leakage, avoiding cross-infection, and ensuring the safety of clinical use. More importantly, the system realizes the linkage control of drug flow rate, negative pressure intensity, and vibration frequency through the main unit module 1. When the vibration drive unit starts and begins to vibrate and activate the drug solution in the root canal, the drug supply pump unit 7 and the negative pressure suction unit 8 start synchronously, truly realizing the synchronous operation of negative pressure suction and drug solution vibration activation. This allows the vibrated and activated drug solution to act on the inner wall of the root canal in a timely and uniform manner, giving full play to the cleaning effect of the drug solution. At the same time, the contaminated drug solution and debris can be promptly drawn back by the negative pressure, forming a closed-loop synergy of "supply-activation-drawback", which significantly improves the cleaning efficiency and safety of root canal irrigation.

[0044] The system comprises a main unit module 1, a handle module 2, a negative pressure irrigation needle 3, and a wastewater collection module 4. The main unit module 1 can be designed as a benchtop or portable unit to integrate control and functional units. The handle module 2 can be ergonomically designed for prolonged use by healthcare professionals. The negative pressure irrigation needle 3, acting directly on the root canal, can be made of various medical-grade materials, such as stainless steel or nickel-titanium alloy. The wastewater collection module 4 can consist of one or more collection containers for collecting wastewater generated during the irrigation process.

[0045] The negative pressure irrigation needle 3 is designed as a dual-channel coaxial structure consisting of an outer wall supply channel 31 and an inner negative pressure backflow channel 32. For example, the outer wall of the needle can be provided with an axially extending supply channel 31, or a supply path can be formed through the gap between the outer surface of the needle and the root canal wall. Simultaneously, an independent central channel is provided inside the needle to achieve the negative pressure backflow function. This coaxial design ensures that supply and backflow occur synchronously within the same operating area, avoiding excessive accumulation or overflow of the medication.

[0046] The negative pressure flushing needle 3 is rigidly connected to the handle module 2. This connection can be achieved through various methods such as threaded engagement, snap-fit, or welding to ensure that the needle remains stable during operation and effectively transmits the vibration energy generated by the handle module 2 to the needle.

[0047] The handle module 2 has a built-in vibration transmission component 5. The vibration transmission component 5 may include a piezoelectric ceramic element, an electromagnetic vibrator, or a pneumatic vibrator, etc., and its function is to transmit vibration energy from the drive source to the negative pressure flushing needle 3, thereby activating the flushing solution and enhancing its removal of contaminants from the root canal wall.

[0048] The main unit module 1 integrates a drug storage unit 6, a drug delivery pump unit 7, a negative pressure suction unit 8, a vibration drive unit, and a flushing speed adjustment unit 10. The drug storage unit 6 can be a replaceable drug bottle or a built-in reservoir. The drug delivery pump unit 7 can be a peristaltic pump or a plunger pump, etc., to precisely control the flow rate of the drug. The negative pressure suction unit 8 can be composed of a vacuum pump or a negative pressure generator, used to generate and maintain a stable negative pressure. The vibration drive unit can be an ultrasonic generator, a sound wave generator, or a micro motor, etc., used to generate the required vibration frequency and amplitude. The flushing speed adjustment unit 10 can be in the form of a knob, button, or touchscreen, allowing the operator to adjust various parameters according to clinical needs.

[0049] The main unit module 1 and the sewage collection module 4 are connected in a sealed manner via a pipe 11. The pipe 11 can be a medical-grade flexible hose or a rigid pipe, and is connected to the main unit module 1 and the sewage collection module 4 by means of clamps, threaded joints or quick couplings, etc., and the connection is ensured to be airtight to prevent sewage leakage and cross-contamination.

[0050] The root canal irrigation negative pressure system of this application simplifies the operation process and reduces the workload of medical staff through integrated design. The dual-channel coaxial negative pressure irrigation needle 3 enables simultaneous fluid supply and negative pressure backflow, effectively preventing fluid spillage and contaminant reflux, and improving irrigation safety. The handle has a built-in vibration transmission component 5, which, combined with the vibration drive unit integrated into the main unit, can effectively activate the irrigation fluid and enhance the removal of contaminants from the root canal wall. At the same time, the sealed connection between the main unit and the wastewater collection module 4 effectively prevents wastewater leakage and reduces the risk of cross-infection.

[0051] The negative pressure irrigation needle 3 of this application is compatible with all root canal irrigation needle products on the market, including dedicated root canal irrigation needles. There is no need to impose too many restrictions on the specific type or shape of the needle. As long as it meets the core requirement of "the dual-channel coaxial structure of the outer wall liquid supply channel 31 and the internal negative pressure backflow channel 32", it can achieve perfect compatibility with this system, ensuring the synchronous operation of negative pressure aspiration and drug supply, and adapting to the implementation of the core technical solution. This design not only improves the versatility of the system, but also reduces the cost of clinical use.

[0052] The negative pressure flushing needle 3 has a through hole in the center as a negative pressure back suction channel 32, and four auxiliary suction holes 332 are arranged in a ring on the tip of the needle. The auxiliary suction holes 332 are connected to the central through hole.

[0053] Specifically, the negative pressure irrigation needle 3 is designed in stages according to the actual diameter of the root canal, offering three different sizes: small, medium, and large. This design aims to improve the precision and adaptability of treatment, ensuring that the needle can better enter root canals of different diameters, thereby optimizing the delivery of medication and the aspiration of waste fluid. By selecting the appropriate size, it avoids the situation where the needle is too large to reach the root canal, or too small to cover the required irrigation area.

[0054] In addition, the negative pressure irrigation needle 3 has a through-hole running the entire length of the needle, which serves as a negative pressure backflow channel 32. This design ensures that waste fluid and debris can be efficiently and continuously backflowed from inside the root canal, preventing the accumulation of waste fluid and maintaining a clean environment within the root canal. The permeability of this channel guarantees the continuity and effectiveness of negative pressure suction.

[0055] Building upon this, four auxiliary suction holes 332 are arranged in a ring on the tip surface of the negative pressure flushing needle 3. These auxiliary suction holes 332 are connected to the central through-hole. This design allows negative pressure suction not only to occur through the central through-hole but also to form a wider and more uniform negative pressure attraction in the root apex region through the auxiliary suction holes 332 on the needle tip surface. This helps to more thoroughly aspirate the medication, debris, and microorganisms from the root apex region, further improving flushing efficiency and safety, and reducing medication residue in the root apex region.

[0056] Through the above technical solutions, the root canal rinsing negative pressure irrigation system can significantly improve the accuracy, safety, and efficiency of root canal treatment. The negative pressure irrigation needles 3 are designed according to root canal diameter, allowing dentists to select the most suitable needle size based on the patient's actual root canal condition. This ensures the needle can effectively penetrate the root canal, avoiding insufficient irrigation or damage caused by mismatched needle sizes. The central through-hole serves as the negative pressure suction channel 32, working in conjunction with the auxiliary suction holes 332 distributed in a ring on the needle tip face to construct a highly efficient, multi-point negative pressure suction system. This system not only rapidly suctions back waste fluid and debris from the root canal but also creates a more uniform negative pressure suction in the apical region, ensuring thorough removal of the rinsing solution and preventing medication spillage and residue of contaminants in the apical region. Overall, these design features work synergistically to make the root canal irrigation process more controllable, safe, and efficient, thereby improving the success rate of root canal treatment and patient comfort.

[0057] The main body of the negative pressure irrigation needle 3 is made of medical-grade TC4 titanium alloy, and the surface is anodized. The liquid supply outlet and the inner wall of the negative pressure channel are polished to Ra≤0.05μm. The needle tip adopts a 15° blunted bevel angle with a rounded corner radius of 0.02mm. A 0.03mm thick reinforcing ring is set in the middle section of the needle 5mm away from the needle tip.

[0058] Specifically, the main body of the negative pressure irrigation needle 3 is made of medical-grade TC4 titanium alloy. This material has excellent biocompatibility, high strength, low density, and good corrosion resistance, ensuring that the needle can be used for a long time in the complex oral environment without causing harmful reactions, while meeting the stringent requirements for material safety in medical devices. Its surface is anodized, forming a dense and stable oxide film on the titanium alloy surface, further improving its surface hardness, wear resistance, and corrosion resistance, and effectively reducing the release of metal ions, thereby enhancing the biosafety of the needle.

[0059] The fluid supply outlet and the inner wall of the negative pressure channel are polished to Ra≤0.05μm, meaning extremely low surface roughness. This high-precision polishing significantly reduces the frictional resistance of the fluid on the inner wall of the channel, ensuring that the irrigation solution can be delivered smoothly and efficiently to the deep root canal, and allowing contaminated solutions to be smoothly and quickly drawn back by the negative pressure, avoiding fluid stagnation or eddy currents. Furthermore, the smooth inner wall surface is less prone to bacterial and biofilm adhesion, helping to maintain the cleanliness and hygiene of the irrigation system and reducing the risk of cross-infection.

[0060] The needle tip features a 15° blunted bevel angle and a 0.02mm rounded corner radius. This blunting design aims to minimize the risk of mechanical damage to the root canal wall or periapical tissues during intracanal manipulation, thus improving operational safety. The combination of the blunted bevel angle and the small rounded corner radius makes the needle move more smoothly during insertion and movement, reducing the likelihood of perforation or scratching of the root canal wall, making it particularly suitable for curved or calcified root canals.

[0061] A 0.03mm thick reinforcing ring is installed 5mm from the needle tip in the middle section of the needle. This reinforcing ring, through localized thickening, significantly improves the bending and fatigue resistance of the middle section of the needle. During root canal treatment, the needle may be subjected to lateral pressure or vibration stress from the root canal wall. The design of the reinforcing ring effectively prevents the needle from deforming, bending, or even breaking during delicate operations or prolonged vibration activation, thereby ensuring the stability and safety of the operation and extending the service life of the needle.

[0062] Through the above technical solutions, the negative pressure irrigation needle 3 has been significantly optimized in terms of materials, surface treatment, fluid channels, needle tip design, and structural strength. The medical-grade TC4 titanium alloy body and anodizing treatment ensure the needle's biocompatibility and corrosion resistance, effectively avoiding potential harm to patients. The high-precision polished fluid outlet and negative pressure channel inner wall greatly improve the efficiency of drug delivery and contaminant backflow, ensuring thorough irrigation. The blunted bevel and rounded corner design of the needle tip significantly reduces the risk of damage to root canal tissues during operation, improving treatment safety. Simultaneously, the reinforcing ring enhances the needle's structural stability, making it less prone to deformation or breakage under complex root canal environments and vibration activation, thus ensuring the reliability and durability of the entire irrigation system. These improvements work synergistically to provide a safer, more efficient, and stable irrigation experience during root canal treatment.

[0063] This application further proposes that the front end of the handle module 2 is provided with a quick-release rigid connection base 21. The connection base 21 is composed of a needle connection handle 211 and a handle interface seat 212, and adopts a 1:10 taper positioning and snap-locking structure. The connection base 21 is equipped with a replaceable adapter head, which includes at least one of a threaded pneumatic acoustic wave vibrator adapter head, a snap-lock ultrasonic transducer adapter head, and a pin-type vibration motor adapter head.

[0064] Specifically, the quick-release rigid connection base 21 is a connection mechanism that allows for rapid installation and disassembly while ensuring sufficient strength and stability of the connected structure to effectively transmit vibrations and withstand operating forces. This base typically consists of two or more parts that achieve rapid locking and unlocking through mechanical engagement. For example, it can employ buttons, levers, or rotating rings, combined with internal locking elements, to achieve quick connection and separation. Its rigidity ensures the effective transmission of vibrational energy from the handle module 2 to the negative pressure flushing needle 3, preventing energy loss.

[0065] The connecting base 21 consists of a needle connecting handle 211 and a handle interface seat 212, clearly defining the components of the quick-release rigid connecting base 21. The needle connecting handle 211 is part of or connected to the negative pressure flushing needle 3, while the handle interface seat 212 is part of the handle module 2; the two are engaged via a quick-release mechanism. The needle connecting handle 211 is typically designed as an insertion or snap-in structure, its shape matching the inner cavity of the handle interface seat 212. The handle interface seat 212 provides a structure for accommodating and locking the needle connecting handle 211. This split design facilitates the replacement and sterilization of the negative pressure flushing needle 3.

[0066] The 1:10 taper positioning and snap-locking structure is a specific connection mechanism that combines the advantages of taper fit and snap-locking. 1:10 taper positioning provides precise axial and radial positioning, ensuring connection stability and concentricity, while facilitating disassembly; snap-locking provides quick and reliable mechanical fixation, preventing accidental detachment. The outer or inner surface of the needle connecting handle 211 is designed with a 1:10 taper, which mates with the corresponding taper surface of the handle interface seat 212. When the needle connecting handle 211 is inserted into the handle interface seat 212, the taper surface creates a self-locking effect, providing precise positioning. Based on this, one or more snaps mechanically lock the two together, ensuring a robust connection during vibration and operation. This structure guarantees both connection precision and rigidity while also ensuring ease of operation.

[0067] The connection base 21 is equipped with replaceable adapters, meaning it can accept different types of adapters for connecting vibration sources based on different principles. The connection base 21 has standardized interfaces, such as threads, slots, or sockets, internally or externally, to facilitate the installation and removal of different types of adapters. This design enables the system to be compatible with various vibration technologies, improving the equipment's versatility and upgrade potential.

[0068] The adapters include at least one of the following: threaded pneumatic acoustic transducer adapters, snap-on ultrasonic transducer adapters, and pin-type vibration motor adapters. Threaded pneumatic acoustic transducer adapters have internal or external threads for screwing into the corresponding threaded interface of the pneumatic acoustic transducer. This connection method typically provides high connection strength and sealing. Snap-on ultrasonic transducer adapters are designed with a snap-on mechanism for quick engagement with the interface of the ultrasonic transducer. The snap-on structure typically includes a spring arm and a protrusion, which are locked by pressing or rotating. Pin-type vibration motor adapters have a socket or slot for inserting a pin or connecting rod of the vibration motor. The pin is typically secured by a spring or friction, allowing for quick insertion and removal. The design of these adapters allows the handle module 2 to flexibly select and replace vibration sources based on different principles according to actual treatment needs, thereby achieving diversified control over the drug activation method.

[0069] By incorporating a quick-release rigid connection base 21 at the front end of the handle module 2, and employing a 1:10 taper positioning and snap-locking structure, a rapid, reliable, and robust connection is achieved between the negative pressure irrigation needle 3 and the handle module 2. This design not only ensures that vibration energy is efficiently and without damage transmitted from the vibration transmission component 5 built into the handle module 2 to the negative pressure irrigation needle 3, thereby effectively activating the medication within the root canal, but also greatly simplifies the installation and removal process of the needle, facilitating rapid intraoperative replacement and thorough postoperative disinfection. Furthermore, by configuring replaceable adapters, such as threaded pneumatic acoustic transducer adapters, snap-lock ultrasonic transducer adapters, or pin-type vibration motor adapters, the system can flexibly select and switch between different types of vibration sources according to different clinical needs and treatment strategies. This significantly improves the system's versatility and adaptability, allowing physicians to select the most suitable vibration activation method based on the complexity of the root canal, infection status, and personal preferences, thereby optimizing treatment outcomes and improving the efficiency and precision of root canal treatment.

[0070] This application further proposes that the sewage collection module 4 includes a 1000mL medical-grade PP sewage collection bottle 41, the cap of the sewage collection bottle 41 is provided with a silicone and fluororubber double sealing layer 42, and the cap has a built-in float-type anti-overflow valve; the pipeline 11 adopts a quick-connect reverse double locking structure, and the pipeline 11 is provided with an arc transition joint at the bend, with a bending radius ≥5cm.

[0071] Specifically, the wastewater collection module 4 uses a 1000mL medical-grade PP wastewater collection bottle 41. The bottle body is injection molded from medical-grade polypropylene material, which possesses excellent biocompatibility, chemical corrosion resistance, high-temperature sterilization resistance, and good mechanical strength, ensuring the safety and durability of the collection bottle in a medical environment. The 1000mL capacity is sufficient to meet the wastewater collection needs generated during a single or multiple root canal treatments, effectively reducing the need for frequent bottle changes and improving work efficiency.

[0072] To further enhance sealing performance and operational safety, the cap of the wastewater collection bottle 41 is equipped with a dual sealing layer 42 consisting of silicone and fluororubber. The silicone sealing layer 42 typically provides good elasticity and initial sealing, while the fluororubber sealing layer 42, due to its superior chemical corrosion resistance and high-temperature resistance, effectively resists the erosion of various rinsing solutions and disinfectants. Together, they form a robust defense, ensuring a tight fit between the cap and the bottle opening, preventing wastewater leakage or the entry of external air, thereby maintaining the negative pressure state within the system. Furthermore, a float-type anti-overflow valve is also built into the cap. This anti-overflow valve operates on the principle of buoyancy; when the wastewater level reaches a preset height, the float will automatically rise and block the negative pressure channel, effectively preventing wastewater from being sucked into the negative pressure suction unit 8, protecting the core components of the main module 1 from contamination and damage, while also preventing wastewater overflow and maintaining a clean and hygienic operating environment.

[0073] Regarding the connection of pipe 11, pipe 11 adopts a quick-connect, reverse-locking double-locking structure. The quick-connect design makes the connection and disassembly of pipe 11 simple and quick, significantly improving operational convenience. The reverse-locking structure provides additional mechanical fixation on top of the quick-connect design. Through the cooperation of the barb on the pipe 11 connector and the interface seat, a firm lock is formed, effectively preventing pipe 11 from loosening or falling off under conditions such as negative pressure suction, vibration, or accidental pulling, ensuring the continuity and sealing of the fluid channel. This double-locking mechanism greatly enhances the reliability of pipe 11 connection. At the same time, to optimize fluid transmission efficiency and extend the service life of pipe 11, pipe 11 is equipped with an arc transition joint at the bend, with a bending radius of not less than 5cm. The arc transition design can significantly reduce fluid resistance loss and turbulence at the bend, ensuring that sewage can be smoothly and steadily drawn back. The larger bending radius avoids stress concentration or dead angles caused by excessive bending of pipe 11, thereby effectively preventing pipe 11 blockage and reducing the risk of fatigue damage to pipe 11 materials.

[0074] Through the above technical solutions, this application effectively solves the hygiene, safety, and efficiency issues related to wastewater collection and treatment during root canal treatment. The 1000mL wastewater collection bottle 41, made of medical-grade PP material, provides ample capacity and reliable biocompatibility. The combination of a silicone and fluororubber double sealing layer 42 and a float-type anti-overflow valve fundamentally eliminates the risk of wastewater leakage and overflow, protecting the negative pressure suction unit 8 and maintaining a clean operating environment. The quick-connect, double-locking structure of the tubing 11 ensures convenient and secure connection, preventing accidental detachment. The arc-shaped transition joint and large bending radius design ensure smooth wastewater backflow, preventing blockages and improving the overall operating efficiency and reliability of the system. These improvements work together to make the root canal rinsing negative pressure irrigation system safer, more efficient, and more hygienic in wastewater collection and treatment, thereby improving the quality of root canal treatment and patient safety.

[0075] This application further proposes that the system realizes the linkage control of liquid flow rate, negative pressure intensity and vibration frequency through host module 1. After vibration starts, liquid supply and negative pressure start synchronously, with a delay time ≤0.1s.

[0076] Specifically, the linkage control refers to the unified and coordinated management of the drug storage unit 6, drug delivery pump unit 7, negative pressure suction unit 8, and vibration drive unit by the central processing unit or microcontroller inside the main module 1 based on preset treatment modes or real-time feedback. Drug flow rate can be precisely controlled by adjusting the drive voltage or current of the drug delivery pump unit 7; negative pressure intensity is controlled by adjusting the vacuum pump power of the negative pressure suction unit 8 or adjusting the valve opening to maintain a stable negative pressure within the root canal; and vibration frequency is controlled by the signal generator of the vibration drive unit generating a specific frequency electrical signal, which drives the vibration transmission component 5 built into the handle module 2. Linkage control ensures that these key parameters do not operate independently but are adjusted collaboratively according to treatment needs. For example, during heavily soiled root canal irrigation, the system can automatically increase drug flow rate, negative pressure intensity, and vibration frequency to enhance the cleaning effect.

[0077] Simultaneously, the fluid supply and negative pressure are activated synchronously after vibration activation. This means that when the vibration drive unit is activated, the main module 1 immediately issues a command to synchronously activate the drug supply pump unit 7 and the negative pressure suction unit 8. This synchronous activation mechanism is achieved through the control program inside the main module 1. For example, within a very short time after receiving the vibration activation signal, the start commands of the drug supply pump and the negative pressure pump are triggered simultaneously through parallel processing or high-priority interruption. This design aims to ensure that while the drug solution is activated by vibration, it can be supplied to the root canal in a timely and sufficient manner, and that the generated debris and contaminants can be effectively and promptly drawn back by the negative pressure, thereby creating a dynamically balanced and efficient irrigation environment within the root canal.

[0078] Furthermore, a delay time of ≤0.1s means that the time interval between the vibration start command and the actual activation of the fluid supply and negative pressure functions is strictly controlled within 0.1 seconds. Achieving such a short delay time requires the host module 1 to possess a high-performance processor and optimized control algorithms to ensure the real-time nature of command transmission and execution. For example, a high-speed microcontroller can be used, and the hardware circuit design can be optimized to reduce delays in the signal transmission path. Simultaneously, a real-time operating system or interrupt-driven mechanism can be employed at the software level to ensure the priority and response speed of critical control tasks. This extremely short delay time guarantees the immediacy of the system response, avoiding problems such as decreased flushing efficiency, unnecessary retention of medication in the root canal, or untimely negative pressure backflow caused by asynchronous function activation.

[0079] Through the aforementioned technical solution, the system achieves precise and coordinated control of drug flow rate, negative pressure intensity, and vibration frequency, ensuring the synergy and efficiency of various functions during root canal irrigation. The synchronous activation of drug supply and negative pressure after vibration initiation, with an extremely short delay, effectively avoids unnecessary drug retention within the root canal, reduces the risk of drug spillage, and ensures that contaminants are promptly and effectively aspirated. This highly coordinated control mechanism allows the drug to penetrate and clean the root canal walls more thoroughly under vibration activation, while the continuous removal of debris and infected material by negative pressure significantly improves the efficiency and thoroughness of root canal irrigation, thereby optimizing the clinical outcomes of root canal treatment.

[0080] In actual root canal treatment, how to systematically and efficiently utilize these integrated functions to ensure the accuracy, safety, and thoroughness of the irrigation process, and avoid poor irrigation results or complications due to improper operation or missing procedures, is a technical problem that needs further resolution.

[0081] Therefore, this application further proposes a negative pressure irrigation method for root canal treatment, which includes the following steps: S1. Preoperative preparation: Assess the root canal specifications and select the corresponding model of negative pressure irrigation needle 3, and match the vibration source and irrigation parameters. S2, Liquid supply: The medication flows smoothly into the apical region through the outer wall of the needle along the root canal wall; S3, negative pressure back suction: activate negative pressure suction unit 8 to back suction the contaminated medicine liquid through the internal channel of the needle; S4. Vibration activation: Start the vibration drive unit to transmit vibration to the needle to activate the drug solution through the handle; S5. Collaborative control: The main module 1 adjusts the flow rate, negative pressure, and vibration parameters in a coordinated manner. S6. Postoperative care: Turn off vibration and fluid supply functions, maintain negative pressure operation for a preset time, then disassemble and disinfect.

[0082] In the above method, the preoperative preparation steps aim to ensure the personalization and precision of root canal treatment. This step includes a detailed assessment of the patient's root canal morphology, size, and curvature, for example, using X-ray imaging or a root canal measuring instrument. Based on the assessment results, a negative pressure irrigation needle 3 matching the root canal diameter is selected to ensure effective needle entry into the root canal and sufficient space for drug flow and aspiration. Simultaneously, appropriate vibration sources and irrigation parameters are matched according to the complexity of the root canal and the degree of infection to achieve the best treatment outcome.

[0083] The fluid delivery procedure describes the method of drug delivery. The drug solution is driven by the drug delivery pump unit 7 of the main module 1 and delivered through the outer wall of the negative pressure flushing needle 3. This design allows the drug solution to flow downwards along the root canal wall in a gentle and uniform manner, avoiding direct impact on the root apex and thus reducing the risk of drug spillage in the root apex region. The gentle inflow of the drug solution helps to fully wet the root canal wall and gradually reach the root apex region, laying the foundation for subsequent rinsing and contaminant removal.

[0084] The negative pressure aspiration step aims to effectively remove contaminants from the root canal. Simultaneously with the medication administration, the negative pressure suction unit 8 of the main module 1 is activated. Negative pressure is generated through the central through-hole of the negative pressure irrigation needle 3, promptly aspirating away debris, bacteria, infected tissue, and other contaminants dissolved or suspended in the root canal. This negative pressure aspiration mechanism continuously removes contaminants from the root canal, preventing their accumulation or being pushed towards the apex, thus maintaining root canal cleanliness and effectively avoiding excessive accumulation of medication within the root canal.

[0085] The vibration activation step aims to enhance the cleaning and penetration capabilities of the medication. After the vibration drive unit of the main module 1 is activated, the vibration energy is transmitted to the negative pressure irrigation needle 3 through the vibration transmission component 5 built into the handle module 2. The vibration of the needle can generate acoustic flow and cavitation effects, effectively agitating the medication in the root canal, allowing it to better penetrate into the lateral branches, isthmus, and irregular areas of the root canal, and loosening the biofilm and debris attached to the root canal wall, thereby significantly improving the activation effect of the medication and the cleaning efficiency of the root canal.

[0086] The collaborative control mechanism emphasizes dynamic optimization during treatment. The main unit 1 can adjust key parameters such as drug flow rate, negative pressure intensity, and vibration frequency in a coordinated manner based on preset treatment plans or intraoperative feedback. This coordinated control ensures consistency in the supply, aspiration, and activation processes. For example, when enhanced cleaning is needed, both drug flow rate and vibration frequency can be increased simultaneously, while the negative pressure can be adjusted appropriately to maintain balance; in areas with complex root canal morphology or sensitivity, parameters can be reduced to ensure operational safety. Through this coordinated adjustment, the system can adapt to different root canal conditions and treatment stages, achieving optimal irrigation results.

[0087] The post-operative finishing steps aim to ensure the thoroughness of the treatment and the hygiene of the system. After completing root canal irrigation, the vibration drive unit and drug delivery pump unit 7 are first turned off, stopping the drug supply and vibration activation. Subsequently, the negative pressure suction unit 8 will continue to run for a preset time to thoroughly remove residual drug and contaminants from the root canal, ensuring the root canal is dry and clean. Finally, the operator can safely disassemble the negative pressure irrigation needle 3 for disinfection, preparing it for the next use while avoiding cross-infection.

[0088] The aforementioned negative pressure irrigation method for root canal treatment organically integrates the various functions of the root canal irrigation system into a standardized operating procedure. Firstly, preoperative preparation ensures personalized and precise treatment. By assessing the root canal specifications and selecting a matching negative pressure irrigation needle 3, vibration source, and irrigation parameters, blind operation and inappropriate selection are avoided, laying the foundation for subsequent treatment. Furthermore, the negative pressure irrigation needle 3 can be a commonly used clinical root canal irrigation needle, simply repurposed from its usual function of injecting irrigation drugs to negative pressure suction. A suitable root canal irrigation needle can be selected based on the specific root canal condition. The supply port is connected to the handle module and is separate from the negative pressure needle. The supply port is a metal tube whose angle can be adjusted to be parallel to the negative pressure irrigation needle. The supply port is located at the bottom of the negative pressure irrigation needle and does not enter the root canal orifice; only the negative pressure irrigation needle enters the root canal to achieve negative pressure irrigation and vibration, reducing the space required to enter the root canal and minimizing the amount of root canal preparation. The vibration activation step transmits vibration to the needle via the vibration drive unit, significantly enhancing the penetration and cleaning ability of the medication, effectively loosening and removing biofilm and debris from the root canal walls. More importantly, the collaborative control function of the main module 1 can dynamically optimize the flow rate, negative pressure, and vibration parameters, ensuring a balance and coordination between fluid supply, aspiration, and activation. This maximizes the efficiency and thoroughness of root canal cleaning while ensuring safety. Finally, the post-operative closing step maintains negative pressure for a preset time to thoroughly remove residual medication and contaminants, ensuring the dryness of the root canal and the hygiene of the system, significantly improving the overall effectiveness of root canal treatment and patient safety.

[0089] In the preoperative preparation steps, if there is a lack of clear guidance on the specific selection criteria for the negative pressure irrigation needle 3 and the setting of irrigation parameters, it may lead to a mismatch between the needle and the root canal size, affecting the effective delivery and backflow of the medication, or improper irrigation parameters, thereby reducing the treatment effect or even causing complications.

[0090] In response, this application further proposes that, in the aforementioned preoperative preparation steps, the outer diameter of the negative pressure irrigation needle 3 should not exceed 80% of the root canal diameter. This technical feature aims to ensure sufficient operating space for the negative pressure irrigation needle 3 within the root canal. Specifically, before performing root canal treatment, the dentist will assess the anatomical morphology and diameter of the root canal using X-ray films, cone-beam CT, or a root canal measuring instrument. Based on the measurement results, a negative pressure irrigation needle 3 with an outer diameter not exceeding 80% of the root canal diameter is selected. For example, if the diameter at the narrowest point of the root canal is 1 mm, then an irrigation needle with an outer diameter not exceeding 0.8 mm should be selected. This effectively prevents the needle from becoming stuck or blocked within the root canal, ensuring that the medication can flow smoothly along the outer wall of the needle into the apical region, while also ensuring that the internal negative pressure backflow channel 32 can effectively backflow medication containing contaminants. In addition, leaving sufficient clearance also facilitates the effective transfer of vibrational energy within the medication, enhancing the activation effect of the medication.

[0091] Simultaneously, the irrigation parameters include at least one of the following: routine cleaning parameters, heavily contaminated parameters, and fine root canal parameters. This technical feature introduces personalized irrigation protocols for different clinical situations. Specifically, the main unit module 1 can preset or allow users to customize multiple irrigation parameter modes to address differences in root canal infection severity, anatomical complexity, and other factors. For example, routine cleaning parameters can be used for general root canal infections; heavily contaminated root canals with refractory infection or extensive necrotic tissue can be treated with heavily contaminated parameters, which may involve higher solution flow rates, stronger negative pressure, or more frequent vibration; and fine root canal parameters can be used for severely calcified or highly curved fine root canals to ensure operational safety and effectiveness. This tiered design makes treatment protocols more targeted, improving treatment accuracy and efficiency.

[0092] Furthermore, the standard cleaning parameters are specifically set as follows: flow rate 5-10 mL / min, negative pressure -0.05 to -0.1 kPa, and vibration frequency 0.1-30 kHz. This technical feature provides a specific and optimized set of operating parameters for standard root canal cleaning. Specifically, when the standard cleaning mode is selected, the main module 1 automatically controls the drug delivery pump unit 7 to deliver the drug solution at a flow rate of 5-10 mL / min, ensuring that the drug solution can fully flush the root canal walls and effectively displace contaminants within the root canal. Simultaneously, the negative pressure suction unit 8 maintains a negative pressure of -0.05 to -0.1 kPa to gently and effectively aspirate the drug solution and debris, preventing the drug solution from overflowing from the root apex. The vibration drive unit drives the vibration transmission component 5 at a frequency of 0.1-30 kHz, transmitting the vibration to the negative pressure flushing needle 3 through the handle module 2, activating the drug solution within the root canal and enhancing its ability to remove biofilm and debris. These parameters are set to minimize irritation and damage to the periapical tissues while ensuring cleaning effectiveness.

[0093] Through the aforementioned technical solution, during the preoperative preparation stage, precisely controlling the outer diameter of the negative pressure irrigation needle 3 to not exceed 80% of the root canal diameter ensures sufficient movement space for the needle within the root canal, avoiding the risk of needle impingement or blockage. This not only ensures that the medication can smoothly reach the apical region and effectively aspirate contaminants, but also creates conditions for the efficient transfer of vibration energy within the medication, thereby significantly improving the activation effect of the medication and the root canal cleaning efficiency. Simultaneously, the introduction of graded irrigation parameters, particularly clarifying the specific numerical ranges of routine cleaning parameters, allows physicians to select the most suitable treatment mode based on the specific condition of the root canal. This personalized and refined parameter setting avoids the shortcomings of a "one-size-fits-all" treatment approach, ensuring optimal cleaning and disinfection effects in different clinical scenarios, effectively removing sources of infection within the root canal, while minimizing irritation and damage to periapical tissues, thus improving the success rate and safety of root canal treatment.

[0094] If the vibration source is not selected properly or the vibration amplitude is not controlled precisely, the activation effect of the drug solution may be poor, affecting the removal efficiency of biofilm and debris in the root canal, thereby reducing the treatment effect.

[0095] In response, this application further proposes a technical solution for optimizing the vibration source and precisely controlling the vibration amplitude during the vibration activation step. Specifically, the vibration source can be selected from one of a pneumatic acoustic transducer, an ultrasonic transducer, or a vibration motor. The pneumatic acoustic transducer uses compressed air to drive internal vibrating components, generating mechanical vibration within the acoustic frequency range. This vibration is transmitted to the negative pressure irrigation needle 3 via the handle module 2, causing the needle to generate low-frequency, high-amplitude mechanical disturbances within the root canal. This helps loosen biofilm and debris on the root canal wall and promotes the penetration and flow of irrigation fluid within the root canal, making it particularly suitable for gentle yet effective cleaning of the root canal wall. The ultrasonic transducer converts electrical energy into high-frequency mechanical vibration. When ultrasonic energy is transmitted to the irrigation fluid within the root canal through the negative pressure irrigation needle 3, a cavitation effect is generated in the liquid, i.e., microbubbles are formed and rapidly ruptured, releasing powerful shock waves and microjets. This effect can efficiently break down biofilm, remove debris, and enhance the chemical action of the irrigation fluid, offering significant advantages for cleaning complex root canal systems and stubborn infections. The vibration motor uses an electric motor to drive the eccentric block to rotate and generate periodic mechanical vibration. This vibration is transmitted to the negative pressure flushing needle 3 through the handle module 2, providing a controllable physical stirring effect. Its frequency and amplitude usually have a wide adjustment range, which can be flexibly set according to different root canal shapes and degrees of contamination, so as to achieve effective activation of the medicine and mechanical removal of debris.

[0096] Meanwhile, the vibration amplitude is precisely controlled within the range of 0.01-0.05 mm. This amplitude range is an optimized range verified through extensive experiments. If the amplitude is too small, the activation effect of the irrigating solution may be insufficient, failing to effectively loosen and remove biofilm and debris in the root canal; if the amplitude is too large, it may cause unnecessary mechanical damage to the root canal wall, or even cause patient discomfort. Controlling the vibration amplitude within this precise range ensures that the vibration energy is effectively transmitted within the root canal, which can fully activate the irrigating solution, enhancing its penetration and cleaning ability, while avoiding damage to the root canal tissue, thus achieving safe and efficient root canal irrigation.

[0097] Through the above technical solutions, in the negative pressure irrigation method for root canal treatment, by selecting pneumatic acoustic transducers, ultrasonic transducers, or vibration motors as vibration sources and precisely controlling the vibration amplitude within 0.01-0.05 mm, the activation effect of the irrigation solution can be significantly improved. Specifically, different types of vibration sources can provide diverse activation mechanisms according to clinical needs. For example, the cavitation effect of ultrasound can efficiently break down biofilms, the mechanical disturbance of pneumatic acoustic transducers can promote the penetration of the irrigation solution, and the vibration motor provides controllable physical agitation. Precise amplitude control ensures the effective transmission of vibration energy, which can fully loosen and remove biofilms, debris, and infected materials in the root canal while avoiding excessive mechanical stimulation or damage to the root canal wall. This allows the irrigation solution to act more deeply and evenly on the root canal system, thereby greatly improving the thoroughness of root canal cleaning and disinfection, ultimately improving the success rate of root canal treatment and patient comfort.

[0098] Preferably, this application further proposes that in the collaborative control step, when the liquid level in the storage bottle is ≤50mL, the main unit automatically pauses the liquid supply, and the vibration and negative pressure functions stop synchronously; in the postoperative closing step, the negative pressure operation time is maintained for 10 seconds. Specifically, the liquid storage unit 6 integrated in the main unit module 1 can be equipped with a liquid level sensor, such as a float-type liquid level sensor, a capacitive liquid level sensor, or an ultrasonic liquid level sensor. This sensor monitors the liquid level in the liquid storage unit 6 in real time. When the liquid level is detected to be lower than the preset 50mL threshold, the liquid level sensor sends a signal to the control unit of the main unit module 1. Upon receiving the signal, the control unit immediately executes the instruction to stop the operation of the drug supply pump unit 7, thereby pausing the liquid supply. At the same time, to avoid the risks that may arise from continuing vibration and negative pressure operation without a drug supply, such as damaging the equipment by running dry or drawing air into the root canal, the vibration drive unit and the negative pressure suction unit 8 will also stop working synchronously. In addition, in the postoperative closing step, this application proposes to maintain the negative pressure operation time for 10 seconds. This means that after completing the main root canal irrigation and negative pressure aspiration operations, and turning off the fluid supply and vibration functions, the negative pressure aspiration unit 8 will continue to operate for a preset 10 seconds. This continuous negative pressure is designed to ensure that any residual irrigation fluid, debris, and any microorganisms present in the root canal system are thoroughly aspirated and removed. By maintaining negative pressure for a period of time after fluid supply and vibration have stopped, the root canal can be dried to the maximum extent, creating a clean and dry environment for subsequent treatment steps such as root canal filling.

[0099] Through the above technical solution, when the amount of medication in the medication storage unit 6 is insufficient, the system can automatically and promptly stop all related functions, effectively avoiding damage from the medication pump running dry and the potential risk of air being sucked into the root canal, thus ensuring the safe operation of the equipment and the patient's treatment safety. Simultaneously, during the post-operative closing stage, by setting a negative pressure and running continuously for 10 seconds, the system ensures the thorough removal of residual medication and debris from the root canal, allowing the root canal to achieve a better clean and dry state after treatment. This provides favorable conditions for subsequent root canal filling and significantly improves the quality and success rate of root canal treatment.

[0100] For any parts not mentioned in this invention, existing technologies can be used or referenced.

[0101] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0102] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A root canal irrigation negative pressure flushing system, characterized in that, Includes a main unit module, a handle module, a negative pressure flushing needle, and a wastewater collection module; The negative pressure flushing needle is a dual-channel coaxial structure with an outer wall liquid supply channel and an inner negative pressure back suction channel. The negative pressure flushing needle is rigidly connected to the handle module, and the handle module has a built-in vibration transmission component. The main unit module integrates a medicine storage unit, a medicine supply pump unit, a negative pressure suction unit, a vibration drive unit, and a flushing speed adjustment unit. The main unit module is sealed to the sewage collection module. The host module enables the linkage control of liquid flow rate, negative pressure intensity, and vibration frequency. After the vibration drive unit is started, the drug supply pump unit and the negative pressure suction unit start synchronously, realizing the synchronous operation of negative pressure suction and liquid vibration activation.

2. The root canal irrigation negative pressure system according to claim 1, characterized in that, The negative pressure irrigation needle is compatible with all root canal irrigation needle products on the market, including dedicated root canal irrigation needles.

3. The root canal irrigation negative pressure system according to claim 1, characterized in that, The medication flows out through the supply outlet of the negative pressure flushing needle, contacts part of the outer wall of the needle, and flows along the outer wall of the needle into the root canal.

4. The root canal irrigation negative pressure system according to claim 1, characterized in that, The main module can adjust the flushing speed, negative pressure intensity, and vibration frequency according to the patient's condition to adapt to different clinical treatment needs.

5. The root canal irrigation negative pressure system according to claim 1, characterized in that, The vibration drive unit can generate vibration energy, which is transmitted to the negative pressure irrigation needle through the vibration transmission component to activate the root canal irrigation solution.

6. The root canal irrigation negative pressure system according to claim 5, characterized in that, The vibration drive unit is selected from one of the following: a pneumatic acoustic wave vibrator, an ultrasonic transducer, a vibration motor, or an electric motor.

7. The root canal irrigation negative pressure system according to claim 1, characterized in that, The front end of the handle module is provided with a quick-release rigid connection base, which consists of a needle connecting handle and a handle interface seat. It adopts a tapered positioning and snap-locking structure to realize the quick disassembly and assembly and stable connection of the negative pressure flushing needle.

8. The root canal irrigation negative pressure flushing system according to claim 7, characterized in that, The connecting base is equipped with a replaceable adapter head, which is compatible with different types of vibration drive units to achieve flexible switching of vibration modes.

9. The root canal irrigation negative pressure system according to claim 6, characterized in that, The main unit's liquid storage unit has a built-in liquid level sensor. When the liquid level in the storage bottle is lower than a preset threshold, the main unit automatically stops supplying liquid, and the vibration drive unit and the negative pressure suction unit stop working synchronously.

10. A negative pressure irrigation method for root canal treatment based on the system described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Preoperative preparation: Assess root canal specifications and select a suitable negative pressure irrigation needle, and match the vibration source and irrigation parameters. S2, Liquid Supply: The medication flows out through the liquid supply outlet of the negative pressure flushing needle and flows along the outer wall of the needle into the root canal. S3, Negative pressure back suction: Activate the negative pressure suction unit to back suction the contaminated medicine solution through the negative pressure back suction channel inside the needle; S4. Vibration activation: The vibration drive unit is activated, and the vibration is transmitted to the needle through the vibration transmission component of the handle module to activate the root canal irrigation solution. S5. Collaborative control: The main unit module adjusts the flushing speed, negative pressure intensity, and vibration frequency in conjunction with the patient's condition. S6. Postoperative care: Turn off vibration and fluid supply functions, maintain negative pressure operation for a preset time, then disassemble and disinfect.

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