Visual rotating instrument root canal inverted preparation system

Abstract

The invention relates to the technical field of medical instruments, and particularly discloses a visual rotary instrument root canal inverted preparation system, which comprises a handle, a rotating device, a rotating device and a root canal inverted preparation device, and is characterized in that the handle is internally provided with a driving assembly comprising a main motor and an auxiliary motor; the machine head is detachably connected with the handle; the working tip assembly is detachably connected with the machine head and comprises a shell and a nickel-titanium file arranged in a first accommodating cavity in the shell in a penetrating manner; the control unit comprises a man-machine interaction interface, and the man-machine interaction interface is configured to be capable of receiving rotation parameters and axial feeding parameters input by a user and displaying at least one of the rotation state and the axial position of the nickel titanium file in real time. The main motor controls the auxiliary motor and the work tip assembly to rotate, the auxiliary motor controls the work tip assembly to conduct axial feeding, accurate control over the root canal inverted preparation process is achieved, and the problems that a traditional ultrasonic work tip depends on vibration cutting, so that root canal deviation, wall perforation and the like are caused are solved.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and in particular to a visual rotating instrument root canal inversion preparation system. Background Technology

[0002] Dental caries is a common and prevalent disease in humans. Periapical disease, as a major secondary disease of dental caries, can cause pain and swelling, and in severe cases, the spread of infection can endanger life. Root canal treatment is the core means of removing infection within the root canal and promoting the healing of periapical tissues. However, due to factors such as the complex anatomy of the root canal, some cases of treatment failure require periapical surgery to achieve clinical healing.

[0003] Reverse canal preparation is a crucial step in apical surgery. It involves cleaning and shaping the apical 3mm area of ​​the root canal, removing previous fillings and infected tissue, and constructing a reverse filling cavity to prevent infection leakage. Current reverse canal preparation techniques suffer from problems such as inaccurate positioning, easy root canal damage, and incomplete removal of fillings. Summary of the Invention

[0004] To address the problems associated with existing root canal inversion preparation systems that rely on vibration cutting, this application provides a visual rotary instrument root canal inversion preparation system.

[0005] On the one hand, the visual rotary instrument root canal inversion preparation system provided in this application adopts the following technical solution: A visual rotating instrument root canal inversion preparation system includes: The handle contains a drive assembly, which includes a main motor and an auxiliary motor. The main motor is fixedly installed inside the handle, and the auxiliary motor is connected to the main motor. The head is detachably connected to the handle; The working tip assembly is detachably connected to the machine head. The auxiliary motor is driven by the working tip assembly. The main motor is used to control the rotation of the auxiliary motor and the working tip assembly. The auxiliary motor is used to control the axial feed of the working tip assembly. The working tip assembly includes a housing and a nickel-titanium file. A first receiving cavity is opened in the housing, and the nickel-titanium file passes through the first receiving cavity. The control unit includes a human-machine interface configured to receive user-input rotational parameters and axial feed parameters, and to display in real time at least one of the rotational state and axial position of the nickel-titanium file.

[0006] By adopting the above technical solution, dual drive is achieved by setting a main motor and an auxiliary motor, which combines rotary motion and axial feed. Doctors can independently set and monitor the rotation speed, torque, feed stroke and feed speed in real time on the human-machine interface, realizing visualized root canal inversion preparation. This avoids root canal displacement, lateral perforation and micro-cracks caused by uncontrollable amplitude in traditional ultrasonic vibration equipment, and significantly improves the positioning accuracy and safety of inversion preparation.

[0007] In some implementations, rotational parameters include rotational speed and / or torque, and axial feed parameters include feed stroke and / or feed rate. In some embodiments, a positioning component is provided inside the machine head. The positioning component is connected to the nickel-titanium file and is used to position the nickel-titanium file. The positioning component includes a positioning sleeve, a guide sleeve, and a snap-fit ​​sleeve. The positioning sleeve and the guide sleeve are threaded together. The snap-fit ​​sleeve is fixed inside the positioning sleeve. The snap-fit ​​sleeve has multiple elastic grooves at one end facing the nickel-titanium file. The elastic grooves are spaced apart circumferentially along the snap-fit ​​sleeve, so that the guide sleeve near the nickel-titanium file is elastic. The snap-fit ​​sleeve has a snap-fit ​​groove for inserting the nickel-titanium file.

[0008] By adopting the above technical solution and setting up a positioning component, the nickel-titanium file is automatically positioned after being inserted into the machine head, which facilitates the installation and removal of the nickel-titanium file and helps to improve surgical efficiency.

[0009] In some embodiments, a guide block is provided inside the guide sleeve, and an elastic element is provided inside the guide sleeve. The guide block is connected to a nickel-titanium file. The guide block is slidably disposed inside the guide sleeve. One end of the elastic element contacts the guide block, and the other end contacts the snap-fit ​​sleeve. By adopting the above technical solution, the elastic element can provide a slight clamping force when the nickel-titanium file is installed, which facilitates the installation and removal of the nickel-titanium file.

[0010] In some embodiments, a guide shell is provided on the outer periphery of the positioning component, and a limit groove is formed in the guide shell. A connecting sleeve is connected to the side of the positioning component away from the machine head. The connecting sleeve is driven by the auxiliary motor. A limit block is provided on the connecting sleeve, and the limit block is slidably disposed in the limit groove.

[0011] By adopting the above technical solution, and by setting a limiting block that slides within the limiting groove, positioning can be achieved during the axial feeding of the nickel-titanium file, thus ensuring stable movement of the nickel-titanium file.

[0012] In some embodiments, a second receiving cavity is provided inside the housing, and an endoscope is disposed in the second receiving cavity.

[0013] By adopting the above technical solution, by embedding the endoscope into the housing with its objective lens tip close to the working end of the nickel-titanium file, direct, coaxial surgical field images can be obtained, reducing the problem of visual field interruption caused by switching instruments under traditional microscopes.

[0014] In some embodiments, the nickel-titanium file includes a working end and a connecting end, the working end being connected to the connecting end, the working end including a guide tip and a threaded cutting portion, the threaded cutting portion being disposed on the side relative to the guide tip and closer to the connecting end.

[0015] By adopting the above technical solution, the guide tip plays a guiding role, and the threaded cutting part performs cutting, which can be operated in narrow areas, improving root canal cleaning efficiency and shaping quality.

[0016] In some implementations, the length of the guide tip is 0.5-1.5 mm, and the length of the threaded cut portion is 3-7 mm.

[0017] In some implementations, the handle is equipped with multiple physical buttons, including a power switch, a speed adjustment button, a mode switch, and an endoscope start button, each of which is communicatively connected to the control unit.

[0018] By adopting the above technical solution, physical buttons are integrated into the handle, eliminating the need to step on or touch the screen during surgery, thus reducing aseptic contamination; the button layout conforms to the ergonomics of single-handed grip, facilitating adjustment and operation during surgery.

[0019] In some embodiments, the housing includes a straight portion and a bent portion connected together, and the shape of the nickel-titanium file is adapted to the housing.

[0020] Compared with the prior art, this application includes at least one of the following beneficial technical effects: 1. By placing an endoscope inside the working tip assembly housing, real-time visualization of the root canal can be achieved, solving the problems of misjudgment of positioning and omission of root canals caused by the reliance on external observation in existing technologies, and making the positioning in the root canal preparation process more accurate; 2. This application uses a main motor and an auxiliary motor to control rotation and axial feed respectively. Combined with the pre-bending angle of the guide sleeve and the compact design of the working tip assembly, the working depth and angle of the nickel-titanium file can be precisely controlled, which effectively reduces the risks of root canal displacement, perforation and micro-cracks, and significantly improves operational safety. 3. The detachable head design and spring-loaded clamping structure enable quick replacement of the nickel-titanium file. The non-positioning design reduces assembly difficulty, and the real-time parameter display on the human-machine interface allows operators to accurately control the operation process, greatly improving ease of operation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0022] Figure 2 This is an internal cross-sectional view of an embodiment of this application.

[0023] Figure 3 This is a schematic diagram of the working tip component and the positioning component in the embodiments of this application.

[0024] Figure 4 This is a schematic diagram of the snap-fit ​​sleeve in an embodiment of this application.

[0025] In the picture: 1. Handle; 2. Drive assembly; 21. Main motor; 22. Auxiliary motor; 3. Head; 4. Working tip assembly; 41. Housing; 42. Nickel-titanium file; 43. First receiving cavity; 44. Second receiving cavity; 45. Endoscope; 5. Human-machine interface; 6. Positioning assembly; 61. Positioning sleeve; 62. Guide sleeve; 63. Snap-fit ​​sleeve; 64. Elastic groove; 65. Snap-fit ​​groove; 66. Guide block; 67. Elastic element; 68. Guide shell; 69. Limiting groove; 70. Connecting sleeve; 71. Limiting block. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0027] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Furthermore, the character " / " in this document, unless otherwise specified, generally indicates that the preceding and following related objects have an "or" relationship.

[0028] Reference Figure 1 and Figure 2 This application provides a visual rotary instrument root canal inversion preparation system, including a handle 1, a head 3, a working tip assembly 4, and a control unit. The handle 1 is made of magnesium alloy or carbon fiber composite material, with a weight controlled at 120–140g and a diameter optimized to 33mm, and a non-slip textured surface. A drive assembly 2 is housed within the handle 1, comprising a main motor 21 and an auxiliary motor 22. The main motor 21 is fixedly mounted within the handle 1 and connected to the auxiliary motor 22 via a coupling. A bearing is installed between the auxiliary motor 22 and the inner wall of the handle 1 to ensure stability during operation. The auxiliary motor 22 is connected to the working tip assembly 4 via a transmission connection. The main motor 21 controls the rotation of the auxiliary motor 22 and the working tip assembly 4, while the auxiliary motor 22 controls the axial feed of the working tip assembly 4.

[0029] Specifically, the housing of the auxiliary motor 22 is fixedly connected to the output shaft of the main motor 21, allowing the auxiliary motor 22 to rotate together with the output shaft of the main motor 21. The output shaft of the auxiliary motor 22 is connected to a precision lead screw (or: a gear and rack mechanism, a linear motor mover). When the auxiliary motor 22 is working, the rotation (or linear motion) of its output shaft is converted into linear motion through the lead screw and nut mechanism, thereby driving the positioning component 6 and the nickel-titanium file 42 to feed or retract along its axial direction.

[0030] The head 3 and handle 1 are detachably connected, facilitating replacement or maintenance when needed. In this embodiment, the head 3 and handle 1 are threadedly connected, and a double-sealing structure of silicone sealing ring and metal shielding ring is designed at the threaded connection between the handle 1 and the head 3, supporting high-pressure sterilization at 134℃. In other embodiments, snap-fit, plug-in, welding, or adhesive methods can also be used, which are not limited here. The working tip assembly 4 is detachably connected to the head 3. In this embodiment, the connection method between the working tip assembly 4 and the head 3 is plug-in. In other embodiments, the working tip assembly 4 and the head 3 can be magnetically connected, which is not limited here.

[0031] Specifically, the working tip assembly 4 includes a housing 41 and a nickel-titanium file 42. A first receiving cavity 43 is formed within the housing 41, and the nickel-titanium file 42 passes through the first receiving cavity 43. A second receiving cavity 44 is also formed within the housing 41, independent of the first receiving cavity 43, and an endoscope 45 is disposed within the second receiving cavity 44. The endoscope 45 allows for real-time observation of the internal condition of the root canal, improving the accuracy and safety of treatment.

[0032] Furthermore, the nickel-titanium file 42 includes a working end and a connecting end, which are connected and integrally formed. The working end includes a guide tip and a threaded cutting portion, which is located on the side opposite the guide tip closer to the connecting end. The guide tip has a length of 0.5-1.5 mm, and the threaded cutting portion has a length of 3-7 mm. In a preferred embodiment, the guide tip has a length of 1 mm, and the threaded cutting portion has a length of 5 mm. This design allows the nickel-titanium file 42 to navigate smoothly and cut effectively within the root canal.

[0033] In some embodiments, the housing 41 includes a straight portion and a bent portion connected together. The shape of the nickel-titanium file is adapted to the housing 41, and the shape of the endoscope 45 is also adapted to the housing 41, which facilitates observation and operation during actual surgery.

[0034] Reference Figure 3 and Figure 4The machine head 3 is equipped with a positioning component 6, which is connected to the nickel-titanium file 42 and used for positioning the nickel-titanium file 42. The positioning component 6 includes a positioning sleeve 61, a guide sleeve 62, and a snap-fit ​​sleeve 63. The positioning sleeve 61 and the guide sleeve 62 are threaded together, and the snap-fit ​​sleeve 63 is fixed inside the positioning sleeve 61. The snap-fit ​​sleeve 63 has multiple elastic grooves 64 at intervals along the circumference of the end facing the nickel-titanium file 42, so that the end of the guide sleeve 62 near the nickel-titanium file 42 is elastic. The snap-fit ​​sleeve 63 has a snap-fit ​​groove 65 for inserting the nickel-titanium file 42 to achieve positioning of the nickel-titanium file 42.

[0035] Reference Figure 3 A guide block 66 is provided inside the guide sleeve 62, and an elastic element 67 is provided inside the guide sleeve 62. In this embodiment, the elastic element 67 is specifically a spring. The guide block 66 is connected to the nickel-titanium file 42 and is slidably disposed inside the guide sleeve 62. One end of the elastic element 67 contacts the guide block 66, and the other end contacts the snap-fit ​​sleeve 63. The elastic element 67 can provide a slight clamping force when the nickel-titanium file 42 is installed, so as to achieve stable installation of the nickel-titanium file 42.

[0036] Furthermore, referring to Figure 1 The positioning component 6 is provided with a guide shell 68 on its outer periphery. A limit groove 69 is provided in the guide shell 68. A connecting sleeve 70 is connected to the side of the positioning component 6 away from the machine head 3. The connecting sleeve 70 is connected to the auxiliary motor 22 for transmission. A limit block 71 is provided on the connecting sleeve 70. The limit block 71 is slidably disposed in the limit groove 69.

[0037] Reference Figure 1 The control unit includes a microprocessor (MCU), a motor driver, a signal acquisition circuit, and a human-machine interface 5 (HMI 5), which is a display screen or a touch screen and communicates with the microprocessor. Rotary encoders are installed on the main motor 21 and / or the auxiliary motor 22 to detect and feed back the rotational speed and angular position to the microprocessor in real time. A linear displacement sensor (such as a linear encoder) is installed on the guide housing 68 or the connecting sleeve 70 to detect and feed back the axial absolute position of the nickel-titanium file 42 in real time. A current detection module is integrated into the drive circuit of the main motor 21 to indirectly measure and feed back the cutting torque.

[0038] The human-machine interface 5 is configured to receive user-input rotational and axial feed parameters, and to display in real time at least one of the rotational state and axial position of the nickel-titanium file 42. Rotational parameters include rotational speed and / or torque, while axial feed parameters include feed stroke and / or feed speed. The system can perform differentiated parameter settings for different tooth conditions. For example, for narrow and curved apical structures, low rotational speed (150 rpm), low torque (0.8 N·cm), short stroke (0.5 mm), and slow feed speed (0.02 mm / s) can be set to ensure cutting efficiency while avoiding instrument separation and apical dehiscence. By adjusting these parameters, dentists can provide personalized treatment based on the root canal conditions of different patients.

[0039] The handle 1 is equipped with multiple physical buttons, including a power switch, speed adjustment button, and mode switch button. Each physical button is connected to the control unit. These physical buttons are logically arranged and easy to operate, allowing doctors to quickly adjust system parameters during treatment. After the user issues an operation command via the physical buttons, the microprocessor generates corresponding control commands, which drive the main and auxiliary motors via the motor driver. Simultaneously, the microprocessor receives feedback signals from the encoder and displacement sensor, processes them, and dynamically displays the real-time speed, torque, and axial position of the nickel-titanium file on the human-machine interface 5.

[0040] The implementation principle of this application embodiment is as follows: During use, the doctor first sets appropriate rotation parameters and axial feed parameters through the human-computer interaction interface 5, and then starts the system. The main motor 21 drives the auxiliary motor 22 and the working tip assembly 4 to rotate, and the auxiliary motor 22 controls the axial feed of the working tip assembly 4. Subsequently, the nickel-titanium file 42 enters the root canal, and the threaded cutting part cuts the root canal wall to complete the root canal preparation work.

[0041] This system significantly improves the safety and success rate of root canal treatment through visualization technology and precise control, reduces the risk of complications during treatment, and provides doctors with a more efficient and precise root canal treatment tool.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A visual rotary instrument root canal inversion preparation system, characterized in that, include: Handle (1), a drive assembly (2) is provided inside the handle (1), the drive assembly (2) includes a main motor (21) and an auxiliary motor (22), the main motor (21) is fixedly installed inside the handle (1), and the auxiliary motor (22) is connected to the main motor (21); The head (3) is detachably connected to the handle (1); The working tip assembly (4) is detachably connected to the head (3). The auxiliary motor (22) is drivenly connected to the working tip assembly (4). The main motor (21) is used to control the rotation of the auxiliary motor (22) and the working tip assembly (4). The auxiliary motor (22) is used to control the axial feed of the working tip assembly (4). The working tip assembly (4) includes a housing (41) and a nickel-titanium file (42). A first receiving cavity (43) is provided in the housing (41). The nickel-titanium file (42) passes through the first receiving cavity (43). The control unit includes a human-machine interface (5), which is configured to receive rotational parameters and axial feed parameters input by the user, and to display at least one of the rotational state and axial position of the nickel-titanium file (42) in real time.

2. The visual rotary instrument root canal inversion preparation system according to claim 1, characterized in that: The rotational parameters include rotational speed and / or torque, and the axial feed parameters include feed stroke and / or feed speed.

3. The visual rotary instrument root canal inversion preparation system according to claim 2, characterized in that: The head (3) is provided with a positioning component (6), which is connected to the nickel-titanium file (42) and is used to position the nickel-titanium file (42). The positioning component (6) includes a positioning sleeve (61), a guide sleeve (62) and a snap-fit ​​sleeve (63). The positioning sleeve (61) and the guide sleeve (62) are threaded together. The snap-fit ​​sleeve (63) is fixed inside the positioning sleeve (61). The snap-fit ​​sleeve (63) has a plurality of elastic grooves (64) at one end facing the nickel-titanium file (42). The elastic grooves (64) are spaced apart along the circumference of the snap-fit ​​sleeve (63), so that the end of the guide sleeve (62) near the nickel-titanium file (42) is elastic. The snap-fit ​​sleeve (63) has a snap-fit ​​groove (65) inside, which is used for the nickel-titanium file (42) to be inserted.

4. The visual rotary instrument root canal inversion preparation system according to claim 3, characterized in that: A guide block (66) is provided inside the guide sleeve (62), and an elastic element (67) is provided inside the guide sleeve (62). The guide block (66) is connected to the nickel-titanium file (42). The guide block (66) is slidably disposed inside the guide sleeve (62). One end of the elastic element (67) contacts the guide block (66), and the other end contacts the snap-fit ​​sleeve (63).

5. The visual rotary instrument root canal inversion preparation system according to claim 3, characterized in that: The positioning component (6) is provided with a guide shell (68) on its outer periphery. A limiting groove (69) is provided in the guide shell (68). A connecting sleeve (70) is connected to the side of the positioning component (6) away from the machine head (3). The connecting sleeve (70) is connected to the auxiliary motor (22) for transmission. A limiting block (71) is provided on the connecting sleeve (70). The limiting block (71) is slidably disposed in the limiting groove (69).

6. The visual rotary instrument root canal inversion preparation system according to claim 1, characterized in that: The housing (41) has a second receiving cavity (44) inside, and an endoscope (45) is disposed in the second receiving cavity (44).

7. The visual rotary instrument root canal inversion preparation system according to claim 1, characterized in that: The nickel-titanium file (42) includes a working end and a connecting end, the working end being connected to the connecting end, the working end including a guide tip and a thread cutting portion, the thread cutting portion being disposed on the side relative to the guide tip and closer to the connecting end.

8. The visual rotary instrument root canal inversion preparation system according to claim 7, characterized in that: The length of the guide tip is 0.5-1.5 mm, and the length of the threaded cutting part is 3-7 mm.

9. A visual rotary instrument root canal inversion preparation system according to claim 1, characterized in that: The handle (1) is provided with multiple physical buttons, including a power switch, a speed adjustment button, a mode switch button, and an endoscope (45) start button. Each of the physical buttons is communicatively connected to the control unit.

10. A visual rotary instrument root canal inversion preparation system according to claim 1, characterized in that: The housing (41) includes a straight portion and a bent portion, the straight portion being connected to the bent portion, and the shape of the nickel-titanium file (42) being adapted to the housing (41).

Images