Root canal opening upper section separation instrument extractor

Abstract

The utility model provides a root canal upper section separation instrument extractor, which relates to the technical field of oral instruments and comprises a first elongated component and a second elongated component which are pivotally arranged. The first slender part comprises a first head part and a first handle part connected with the first head part, and the second slender part comprises a second head part and a second handle part connected with the second head part; an included angle alpha is formed between the first handle part and the second handle part, and when external force is applied to enable the included angle alpha between the first handle part and the second handle part to be gradually reduced, the first head part and the second head part move close to each other so as to clamp the separation instrument. The utility model has the beneficial effects that the clamping end is small and can directly extend into the vicinity of a root canal orifice; besides, the length of the first handle part is larger than that of the first head part, and the length of the second handle part is larger than that of the second head part, so that the first head part and the second head part have larger clamping force by applying smaller external force to the first handle part and the second handle part, and the clamping effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field, in particular to a root canal upper segment separation instrument extractor. Background Art

[0002] Due to the complexity of the anatomical structure of the root canal system, the limitations of the anti-fracture performance of root canal treatment instruments, and the non-standard operation of the surgeon, it is impossible to completely avoid the occurrence of instrument separation. If the separation instrument is located in the upper and middle part of the root canal and the affected tooth has periapical lesions before surgery, it is recommended to completely remove the separation instrument.

[0003] Traditional methods for extracting intra-root canal separation instruments include micro-forceps clamping, coiling, cotton needle extraction, root canal file braiding, and surgical bone marrow aspiration. Currently, the standard clinical approach is to use micro-ultrasonic devices for extraction. Ultrasonic vibrations can rapidly heat up nickel-titanium instruments, causing them to break again. Using ultrasonic instruments to extract longer separation instruments carries the risk of secondary separation. While softer memory nickel-titanium wires are widely used in root canal instruments, extracting these separation instruments using high-frequency vibration remains difficult.

[0004] Despite the continuous advancement of equipment used to extract and separate instruments, which has significantly improved treatment success rates, a series of complications can still occur if care is taken during the extraction process. These complications include step formation, excessive dentin removal leading to perforation or longitudinal fissures in the root canal wall, secondary instrument separation, and radicular migration or insertion of instruments into other root canals. These complications can complicate treatment, affect the long-term prognosis of the affected tooth, increase the psychological burden on both the doctor and the patient, and even lead to medical disputes.

[0005] Chinese Patent Publication No. CN221285949U discloses an extractor for instruments that have been broken off and separated in a root canal. The specific solution is "comprising a holder and a wrench, wherein the holder comprises a stapler and a clamping nut. The stapler is conical and has an axial cavity. The front end of the stapler has a smaller cross-section that matches the diameter of the root canal during surgery. The cross-section of the axial cavity is a cross-section of a specific shape. An axial opening groove is provided on the side wall of the conical body of the stapler from the front end to the rear. A tapered thread is provided on the outer peripheral surface of the stapler. The clamping nut is threaded onto the stapler. Its rotation causes the opening groove to contract or expand, thereby allowing the stapler to clamp or loosen the broken object in the root canal; two parallel planes are provided on the radially opposite outer walls of the stapler to form a wrench fixing part; the wrench comprises a handle, and a jaw is provided at one end of the handle to match the wrench fixing part on the stapler, so that the jaw of the wrench is fitted on the wrench fixing part of the stapler to rotate the stapler."

[0006] However, the drawback of the extractor of the above patent is that one needs to hold a wrench in one hand and operate the clamping nut of the clamp with the other hand to make the stapler clamp or loosen the broken object in the root canal. In other words, it requires two-handed operation and cannot be operated with one hand, which is very inconvenient. In addition, the cross-section of the clamping nut is large, which can easily block the surgeon and is not conducive to observing the separation instrument on the root canal opening.

[0007] Therefore, the utility model mainly provides a pair of pliers that can directly clamp the separation instrument in the upper and middle part of the root canal orifice, so that the separation instrument can be removed by clamping method with direct vision on the crown of the tooth. This not only avoids the cutting of dentin by ultrasound and the like, and reduces the occurrence of complications, but also can be operated with one hand, which is convenient to operate. Utility Model Content

[0008] The utility model overcomes the shortcomings of the prior art and provides a root canal orifice upper separation instrument extractor with a purely mechanical structure, which reduces complications, can be operated with one hand, and is easy to use.

[0009] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0010] A root canal orifice upper separation instrument extractor comprises a first slender component and a second slender component pivotally arranged; the first slender component comprises a first head and a first handle portion connected thereto, and the second slender component comprises a second head and a second handle portion connected thereto; when the first head and the second head are in an open state, an angle α is formed between the first handle portion and the second handle portion, and when an external force is applied to gradually reduce the angle α between the first handle portion and the second handle portion, the first head and the second head portion move closer together to clamp the separation instrument; the length of the first handle portion is greater than the length of the first head, and the length of the second handle portion is greater than the length of the second head, so that when an external force is applied to the first handle portion and the second handle portion, a torque is generated so that the first head and the second head portion have a clamping force greater than the applied external force.

[0011] Furthermore, a first connecting hole is provided on the first slender part, and the first head and the first handle part are separated by the first connecting hole; a second connecting hole is provided on the second slender part, and the second head and the second handle part are separated by the second connecting hole; the apertures of the first connecting hole and the second connecting hole are consistent, and the axes of the first connecting hole and the second connecting hole coincide.

[0012] Furthermore, it also includes a pivoting arrangement, which passes through the first connecting hole and the second connecting hole.

[0013] Furthermore, the front ends of the first head and the second head are both formed with gradually and smoothly narrowed clamping ends.

[0014] Furthermore, the linear distance between the clamping end and the pivoting device is 3.5 to 4.5 cm.

[0015] Furthermore, the first handle portion includes a first buckle, which is located on a side of the first handle portion away from the second handle portion; the second handle portion includes a second buckle, which is located on a side of the second handle portion away from the first handle portion.

[0016] Furthermore, a spring is provided on the inner side of the first handle part or the second handle part, and a receiving platform corresponding to the spring is provided on the inner side of the second handle part or the first handle part; when external force is applied to clamp the separation device, the spring will press against the receiving platform and compress with elastic potential energy. When the external force is released, the spring resets to separate the first handle part and the second handle part outward.

[0017] Furthermore, the first elongated member is provided with a space-avoiding groove.

[0018] Furthermore, the first head and the second head are horizontal, or bent into a 45° angle, or bent into a 90° angle.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] The front ends of the first head and the second head of the present invention are both formed with gradually and smoothly narrowing clamping ends, and the clamping ends are small and can directly extend into the vicinity of the root canal orifice; in addition, the length of the first handle portion is greater than the length of the first head portion, and the length of the second handle portion is greater than the length of the second head portion, so that applying a small external force to the first handle portion and the second handle portion will make the first head portion and the second head portion have a larger clamping force, and the clamping effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 This is a top view of the extractor for separating the upper segment of the root canal orifice according to an embodiment of the present invention, wherein the first head and the second head are horizontal;

[0023] Figure 2 This is a three-dimensional diagram of the extractor for separating the upper segment of the root canal orifice according to an embodiment of the present invention, wherein the first head and the second head are horizontal;

[0024] Figure 3 This is a perspective view of another embodiment of the extractor for separating the upper segment of the root canal orifice according to an embodiment of the present invention, wherein the first head and the second head are bent at a 45° angle;

[0025] Figure 4 It is a three-dimensional diagram of another embodiment of the root canal orifice upper segment separation instrument extractor according to an embodiment of the present invention, wherein the first head and the second head are bent at a 90° angle.

[0026] In the figure: 1. First slender member; 101. First head; 102. First handle; 1021. First buckle; 103. First connecting hole; 104. Air avoidance groove; 2. Second slender member; 201. Second head; 202. Second handle; 2021. Second buckle; 3. Pivot setting; 4. Clamping end; 5. Spring; 6. Supporting platform. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0028] like Figures 1 to 2 As shown, the utility model claims protection for a root canal orifice upper separation instrument extractor, comprising a first slender component 1 and a second slender component 2 that are pivotally arranged; the first slender component 1 comprises a first head 101 and a first handle portion 102 connected thereto, and the first head 101 and the first handle portion 102 are connected as one piece; the second slender component 2 comprises a second head 201 and a second handle portion 202 connected thereto, and the second head 201 and the second handle portion 202 are connected as one piece; that is, driving the first handle portion 102 will drive the first head 101 to move, and driving the second handle portion 202 will drive the second head 201 to move.

[0029] When the first head 101 and the second head 201 are inserted into the oral cavity above the root canal opening to clamp the separation instrument, the first head 101 and the second head 201 need to be opened, and the first head 101 and the second head 201 are in the opened state, such as Figure 1 As shown, at this time, an angle α is formed between the first handle portion 102 and the second handle portion 202. When external force is applied to gradually reduce the angle α between the first handle portion 102 and the second handle portion 202, the first head 101 and the second head 201 move closer to clamp the separation instrument.

[0030] In this embodiment, the length of the first handle portion 102 is greater than the length of the first head portion 101, and the length of the second handle portion 202 is greater than the length of the second head portion 201. According to the torque calculation formula M=F×L (M represents torque, F represents force, and L represents lever arm), when external force is applied to the first handle portion 102 and the second handle portion 202, a torque is generated, so that the first head portion 101 and the second head portion 201 have a clamping force greater than the applied external force, thereby enhancing the clamping effect on the separation instrument.

[0031] In this structure, a first connecting hole 103 is provided on the first slender part 1, and the first head part 101 and the first handle part 102 are separated by the first connecting hole 103; a second connecting hole is provided on the second slender part 2, and the second head part 201 and the second handle part 202 are separated by the second connecting hole; the apertures of the first connecting hole 103 and the second connecting hole are consistent, and the axes of the first connecting hole 103 and the second connecting hole coincide; it also includes a pivot setting 3, which passes through the first connecting hole 103 and the second connecting hole setting. In this embodiment, the pivot setting 3 can be a combination of a bolt and a nut, or it can be a rivet. The pivot setting 3 passes through the first connecting hole 103 and the second connecting hole so that the first slender part 1 and the second slender part 2 can be connected together in an openable and closable manner.

[0032] The front ends of the first head 101 and the second head 201 are both formed with a clamping end 4 that gradually and smoothly narrows, making the front end structure of the first head 101 and the second head 201 smaller, reducing obstruction to the surgeon's line of sight; in addition, the straight-line distance between the clamping end 4 and the pivot setting 3 is 3.5 to 4.5 cm. In this embodiment, the straight-line distance between the clamping end 4 and the pivot setting 3 is 4 cm. In actual application, the part from the clamping end 4 to the pivot setting 3 is extended into the oral cavity, and the above distance setting meets the extension requirements.

[0033] The first handle portion 102 includes a first buckle 1021, which is located on a side of the first handle portion 102 away from the second handle portion 202. The second handle portion 202 includes a second buckle 2021, which is located on a side of the second handle portion 202 away from the first handle portion 102. Because this upper root canal orifice separation instrument extractor is designed for single-handed operation, the first buckle 1021 and the second buckle 2021 can be inserted with the thumb and index finger of the same hand, respectively. The first buckle 1021 and the second buckle 2021 are located on the outside of the handle portion 102 so as not to block the first handle portion 102 and the second handle portion 202 from moving together.

[0034] A spring 5 is provided on the inner side of the first handle part 102 or the second handle part 202, and a receiving platform 6 corresponding to the spring 5 is provided on the inner side of the second handle part 202 or the first handle part 102; the spring 5 and the receiving platform 6 are not limited to being provided only on the first handle part 102 or the second handle part 202, as long as the spring 5 and the receiving platform 6 can be used together; when an external force is applied to clamp the separation device, the spring 5 will press against the receiving platform 6 and compress with elastic potential energy. When the external force is released, the spring 5 resets to separate the first handle part 102 and the second handle part 202 outward, thereby allowing the first head 101 and the second head 201 to release the clamping of the separation device.

[0035] The first elongated member 1 is provided with a clearance groove 104 to enable the first elongated member 1 and the second elongated member 2 to pivot.

[0036] Among them, Figure 1 as well as Figure 2 As shown, the first head 101 and the second head 201 are horizontal; as another embodiment, Figure 3 as well as Figure 4 As shown, the first head 101 and the second head 201 can also be bent into a 45° angle or a 90° angle. For different tooth positions, extractors of different embodiments can be used to clamp and remove the separation instrument.

[0037] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A root canal upper segment separation instrument extractor, characterized in that: It comprises a first slender component and a second slender component which are pivotally arranged; the first slender component comprises a first head and a first handle portion connected thereto, and the second slender component comprises a second head and a second handle portion connected thereto; when the first head and the second head are in an open state, an angle α is formed between the first handle portion and the second handle portion, and when an external force is applied to gradually reduce the angle α between the first handle portion and the second handle portion, the first head and the second head move closer to clamp the separation instrument; the length of the first handle portion is greater than the length of the first head, and the length of the second handle portion is greater than the length of the second head, so that when an external force is applied to the first handle portion and the second handle portion, a torque is generated, so that the first head and the second head have a clamping force greater than the applied external force.

2. The root canal upper segment separation instrument extractor according to claim 1, characterized in that: A first connecting hole is provided on the first slender component, and the first head and the first handle are separated by the first connecting hole; a second connecting hole is provided on the second slender component, and the second head and the second handle are separated by the second connecting hole; the apertures of the first connecting hole and the second connecting hole are consistent, and the axes of the first connecting hole and the second connecting hole coincide.

3. The root canal upper segment separation instrument extractor according to claim 2, characterized in that: Also included is a pivot arrangement that extends through the first connection hole and the second connection hole.

4. The root canal upper segment separation instrument extractor according to claim 2 or 3, characterized in that: The front ends of the first head and the second head are both formed with gradually and smoothly narrowed clamping ends.

5. The root canal upper segment separation instrument extractor according to claim 4, characterized in that: The straight-line distance between the clamping end and the pivoting arrangement is 3.5 to 4.5 cm.

6. The root canal upper segment separation instrument extractor according to claim 4, characterized in that: The first handle portion includes a first buckle, which is located on a side of the first handle portion away from the second handle portion; the second handle portion includes a second buckle, which is located on a side of the second handle portion away from the first handle portion.

7. The root canal upper segment separation instrument extractor according to claim 6, characterized in that: A spring is provided on the inner side of the first handle part or the second handle part, and a receiving platform corresponding to the spring is provided on the inner side of the second handle part or the first handle part; when external force is applied to clamp the separation device, the spring will press against the receiving platform and compress with elastic potential energy. When the external force is released, the spring resets to separate the first handle part and the second handle part outward.

8. The root canal upper segment separation instrument extractor according to claim 7, characterized in that: The first elongated component is provided with a space-avoiding groove.

9. The root canal upper segment separation instrument extractor according to claim 8, characterized in that: The first head and the second head are horizontal, or bent into a 45° angle, or bent into a 90° angle.

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