A sleeve structure for a root canal broken instrument extractor

Abstract

The utility model discloses a kind of cannula structures for taking root canal broken inside instrument, it is related to oral medical technology field, including connecting block, connecting block one end inside inner tube structure is fixedly connected with receiving lasso, other end is fixedly connected with push rod structure;The inner tube structure is located inside outer tube structure, and one end of this outer tube structure close to lasso is connected with receiving structure;Cannula structure includes extension pipe, and the extension pipe one end integrally provided with limit head;The both sides of limit head are equipped with side through groove;Extension pipe inside is equipped with the through hole for receiving lasso, and two side through grooves are all communicated with the through hole of extension pipe;Limit head can limit the middle section of lasso and block, prevent the middle section of lasso from entering the through hole of extension pipe completely and cannot reset;In addition, the side through groove set on the both sides of limit head can also not affect the normal activity of lasso, ensure the normal work of lasso.

Description

Technical Field

[0001] This utility model relates to the field of oral medical technology, specifically a cannula structure for removing broken instruments from root canals. Background Technology

[0002] Root canals are important internal structures of teeth. When problems such as pulpitis and periapical periodontitis occur, root canal treatment is an effective way to preserve the affected tooth. When treating root canals, special medical instruments are required. These instruments are generally small in size and are prone to breakage during treatment, leaving them in the root canal. In this case, the broken instrument needs to be removed.

[0003] Chinese Patent Publication No. CN 118902644 A discloses a device for removing broken instruments from root canals, relating to the field of dental medical devices. The device includes a handle sleeve, a clamping assembly, a connector, and a lasso assembly. One end of the handle sleeve has a slot, and a clamping assembly for holding the lasso wire is disposed within the handle sleeve. A sliding button fixedly connected to the clamping assembly is located within the slot of the handle sleeve. By pushing the sliding button, the clamping assembly can move bidirectionally along a straight line within the handle sleeve, thereby controlling the size of the lasso. One end of the connector is inserted into the sleeve seat of the lasso assembly, and the other end is inserted and connected to the slotted end of the handle sleeve. The connector has a rolled edge and an observation window on the side connected to the handle sleeve. The connection between the connector and the sleeve seat, and between the clamping head and the inner cone of the connector, is a Morse taper connection.

[0004] The aforementioned broken instrument removal device uses a collar to remove residual instruments from the root canal. However, the sleeve of the device is a hollow tube, and its end has a component that limits the movement of the collar. When the collar fails to catch the residual instruments or other objects in the root canal, it retracts, at which point the collar will completely retract into the through hole inside the sleeve. After that, the collar may not be able to be pushed out of the central hole of the sleeve again, causing the device to malfunction. Utility Model Content

[0005] The purpose of this utility model is to provide a cannula structure for a root canal fracture instrument. By setting a limiting head and side grooves on both sides, it can ensure that the sling can move normally and limit the sling to prevent it from entering the extension tube completely and being unable to return to its original position, thereby solving the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A cannula structure for retrieving fractured instruments from root canals, comprising:

[0008] A sleeve structure, used to house a sling, with one end connected to an inner tube structure;

[0009] The connecting block, located inside the inner tube structure, is fixedly connected at one end to the storage sling and at the other end to the push rod structure.

[0010] The inner tube structure is located inside the outer tube structure, and the end of the outer tube structure near the sling is connected to the storage structure.

[0011] The sleeve structure includes an extension tube, one end of which is integrally provided with a limiting head; both sides of the limiting head are provided with side through grooves; the inside of the extension tube is provided with a through hole for receiving the sling, and both side through grooves are connected to the through hole of the extension tube.

[0012] As a further technical solution of this utility model, the two ends of the lasso extend into the through hole of the extension tube through two side through grooves, and the middle section of the lasso corresponds to the position of the limiting head.

[0013] As a further technical solution of this utility model, the end of the extension tube away from the limiting head is coaxially and integrally provided with a connecting tube; the middle of the connecting tube is also provided with a through hole for the sling to pass through, and both ends of the sling are fixedly connected to the connecting block.

[0014] As a further technical solution of this utility model, the inner tube structure includes an inner tube body, the inner tube body having an internal thread on the inner side of one end near the connecting tube; the connecting tube having a thread on the outer side, and the connecting tube being threadedly connected to the inner wall of the inner tube body through the thread.

[0015] As a further technical solution of this utility model, the push rod structure includes a push rod, one end of which is located inside the inner tube body and fixedly connected to the connecting block, and the other end is coaxially fixedly connected to a push cap.

[0016] As a further technical solution of this utility model, a spring is provided on the outer side of the end of the push rod near the connecting block.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. In this utility model, the limiting head can limit and block the middle section of the lasso, preventing the middle section of the lasso from completely entering the through hole of the extension tube and being unable to reset; in addition, the side through grooves provided on both sides of the limiting head can also ensure the normal operation of the lasso without affecting its normal movement.

[0019] 2. In this utility model, medical staff can move the connecting block by pushing the push rod, thereby moving the lasso. When the medical staff no longer applies the pushing force, the elastic force generated by the spring can drive the push rod to reset, reducing the difficulty of operation and improving the success rate of the work. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0021] Figure 2 This utility model Figure 1 The main view.

[0022] Figure 3 This utility model Figure 2 AA sectional view.

[0023] Figure 4 This utility model Figure 1 A partial structural diagram.

[0024] Figure 5 This utility model Figure 4 A partial structural diagram.

[0025] Figure 6 This utility model Figure 5 The main view.

[0026] Figure 7 This utility model Figure 6 AA sectional view.

[0027] Figure 8 This utility model Figure 5 A magnified view of a portion of the image.

[0028] Figure 9 This utility model Figure 7 A magnified view of a portion of the image.

[0029] Figure 10 This is a three-dimensional structural diagram of the storage structure of this utility model.

[0030] Figure 11 This utility model Figure 10 Another perspective view.

[0031] Figure 12 This is a three-dimensional structural diagram of the outer tube structure of this utility model.

[0032] Figure 13 This utility model Figure 12 Another perspective view.

[0033] In the diagram: 1-sleeve structure, 2-sling, 3-connecting block, 4-push rod structure, 5-inner tube structure, 6-outer tube structure, 7-storage structure;

[0034] 11-Extension tube, 12-Connecting tube, 13-Thread, 14-Limit head, 15-Side through groove, 41-Push rod, 42-Push cap, 43-Spring, 44-Baffle, 51-Inner tube body, 52-Protrusion, 61-Outer tube body, 62-Storage cap, 63-Clocking block, 71-Storage tube, 72-Expansion plate. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] Please see Figure 1-13 In this embodiment of the utility model, a cannula structure for removing a broken instrument from a root canal includes a cannula structure 1, one end of which is connected to an inner tube structure 5 for storing a sling 2.

[0037] Connecting block 3, located inside the inner tube structure 5, is fixedly connected at one end to the storage sling 2 and at the other end to the push rod structure 4;

[0038] The inner tube structure 5 is located inside the outer tube structure 6, and the end of the outer tube structure 6 near the lasso 2 is connected to the storage structure 7.

[0039] The sleeve structure 1 includes an extension tube 11, one end of which is integrally provided with a limiting head 14; both sides of the limiting head 14 are provided with side through grooves 15; the inside of the extension tube 11 is provided with a through hole for receiving the lasso 2, and both side through grooves 15 are connected to the through hole of the extension tube 11; both ends of the lasso 2 extend into the through hole of the extension tube 11 through the two side through grooves 15 respectively, and the middle section of the lasso 2 corresponds to the position of the limiting head 14;

[0040] The extension tube 11 is coaxially and integrally provided with a connecting tube 12 at one end away from the limiting head 14; the connecting tube 12 is also provided with a through hole in the middle for the lasso 2 to pass through, and both ends of the lasso 2 are fixedly connected to the connecting block 3.

[0041] The inner tube structure 5 includes an inner tube body 51, with an internal thread on the inner side of the end of the inner tube body 51 near the connecting tube 12; the outer side of the connecting tube 12 is provided with a thread 13, and the connecting tube 12 is threadedly connected to the inner wall of the inner tube body 51 through the thread 13; the end of the inner tube body 51 away from the connecting tube 12 is integrally provided with a protrusion 52, and both the middle of the inner side of the connecting tube 12 and the middle of the protrusion 52 are provided with cylindrical inner grooves for the normal movement of the push rod structure 4.

[0042] By adopting the above technical solution, the limiting head 14 can limit and block the middle section of the lasso 2, preventing the middle section of the lasso 2 from completely entering the through hole of the extension tube 11 and being unable to reset; in addition, the side through grooves 15 provided on both sides of the limiting head 14 can also ensure the normal operation of the lasso 2 without affecting its normal movement.

[0043] In this embodiment, the push rod structure 4 includes a push rod 41, one end of which is located inside the inner tube body 51 and fixedly connected to the connecting block 3, and the other end is coaxially fixedly connected to a push cap 42; a spring 43 is provided on the outer side of the end of the push rod 41 near the connecting block 3; one end of the spring 43 is in contact with the baffle 44, and the other end is in contact with the inner wall of the inner tube body 51; the baffle 44 is annular and is coaxially fixedly connected to the push rod 41;

[0044] The outer tube structure 6 includes an outer tube body 61; one end of the outer tube body 61 is integrally provided with a storage cap 62; two locking blocks 63 are symmetrically fixedly connected inside the storage cap 62, and the two locking blocks 63 are respectively engaged with the two ends of the protrusion 52.

[0045] The storage structure 7 includes a storage tube 71, one end of which is provided with a plurality of expansion plates 72. The plurality of expansion plates 72 are inclined and are all attached to the inner wall of the outer tube body 61.

[0046] By adopting the above technical solution, medical staff can move the connecting block 3 by pushing the push rod 41, thereby moving the lasso 2. When the medical staff no longer apply the pushing force, the elastic force generated by the spring 43 can drive the push rod 41 to reset, reducing the difficulty of operation and improving the success rate of work.

[0047] Furthermore, after repeated use, spring 43 will experience elastic fatigue, resulting in a decrease in its elasticity. At this time, spring 43 needs to be replaced in a timely manner.

[0048] The working principle of this utility model is as follows: the limiting head 14 can limit and block the middle section of the lasso 2, preventing the middle section of the lasso 2 from completely entering the through hole of the extension tube 11 and being unable to reset; in addition, the side through grooves 15 provided on both sides of the limiting head 14 can also ensure the normal operation of the lasso 2 without affecting its normal movement.

[0049] Medical staff can move the connecting block 3 by pushing the push rod 41, thereby moving the lasso 2. When the medical staff no longer applies the pushing force, the elastic force generated by the spring 43 can drive the push rod 41 to reset, reducing the difficulty of operation and improving the success rate of the work.

[0050] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cannula structure for retrieving fractured instruments from root canals, characterized in that: include The sleeve structure (1) is used to store the sling (2). One end of the sleeve structure (1) is connected to the inner tube structure (5). The connecting block (3), located inside the inner tube structure (5), is fixedly connected at one end to the storage sling (2) and at the other end to the push rod structure (4); The inner tube structure (5) is located inside the outer tube structure (6), and the end of the outer tube structure (6) near the lasso (2) is connected to the storage structure (7); The sleeve structure (1) includes an extension tube (11), one end of which is integrally provided with a limiting head (14); both sides of the limiting head (14) are provided with side through grooves (15); the inside of the extension tube (11) is provided with a through hole for storing the sling (2), and both side through grooves (15) are connected to the through hole of the extension tube (11).

2. The cannula structure of the root canal fracture instrument according to claim 1, characterized in that: The two ends of the lasso (2) extend into the through hole of the extension tube (11) through two side through grooves (15), and the middle section of the lasso (2) corresponds to the position of the limiting head (14).

3. The cannula structure of the root canal fracture instrument according to claim 1, characterized in that: The extension tube (11) is coaxially integrated with a connecting tube (12) at one end away from the limiting head (14); the connecting tube (12) also has a through hole in the middle for the sling (2) to pass through, and both ends of the sling (2) are fixedly connected to the connecting block (3).

4. The cannula structure of the root canal fracture instrument according to claim 3, characterized in that: The inner tube structure (5) includes an inner tube body (51), which has an internal thread on the inner side of one end near the connecting tube (12); the connecting tube (12) has a thread (13) on the outer side, and the connecting tube (12) is threaded to the inner wall of the inner tube body (51) through the thread (13).

5. The cannula structure of the root canal fracture instrument according to claim 4, characterized in that: The inner tube body (51) is provided with a protrusion (52) at one end away from the connecting tube (12), and a cylindrical inner groove for the normal movement of the push rod structure (4) is provided in the middle of the connecting tube (12) and the middle of the protrusion (52).

6. The cannula structure of the root canal fracture instrument according to claim 5, characterized in that: The push rod structure (4) includes a push rod (41), one end of which is located inside the inner tube body (51) and fixedly connected to the connecting block (3), and the other end is coaxially fixedly connected to a push cap (42).

7. The cannula structure of the root canal fracture instrument according to claim 6, characterized in that: The push rod (41) has a spring (43) on the outer side of the end near the connecting block (3).

8. The cannula structure of the root canal fracture instrument according to claim 7, characterized in that: One end of the spring (43) is attached to the baffle (44), and the other end is attached to the inner wall of the inner tube body (51); the baffle (44) is in the shape of a ring and is coaxially fixedly connected to the push rod (41).

9. The cannula structure of the root canal fracture instrument according to claim 5, characterized in that: The outer tube structure (6) includes an outer tube body (61); one end of the outer tube body (61) is integrally provided with a storage cap (62); two locking blocks (63) are symmetrically fixedly connected inside the storage cap (62), and the two locking blocks (63) are respectively engaged with the two ends of the protrusion (52).

10. The cannula structure of the root canal fracture instrument according to claim 9, characterized in that: The storage structure (7) includes a storage tube (71), one end of which is provided with a plurality of expansion plates (72), which are inclined and fit against the inner wall of the outer tube body (61).

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