Absorbable anchoring device with developing function

Abstract

The utility model relates to an absorbable anchoring device with a developing function, and relates to the technical field of orthopedic surgery tools, and the absorbable anchoring device comprises a nail body which is provided with a containing hole with two through ends; the movable shaft is slidably arranged in the nail body, and a convex ring is arranged on the outer side wall; the ejector rod slides in the radial direction of the nail body and penetrates through the nail body; when the movable shaft moves in the axial direction, the convex ring is used for pushing the ejector rod in the direction away from the movable shaft. The end, close to the nail head of the nail body, of the movable shaft is in coaxial threaded connection with the nail body. One end, far away from the nail head of the nail body, of the movable shaft is provided with a rope locking piece; and the rope locking piece comprises a polygonal frame body embedded in the movable shaft and a wire binding column connected in the frame body. The anchoring device has the effect of reducing secondary damage to the human body caused by the anchoring device.

Description

Technical Field

[0001] The present application relates to the technical field of orthopedic surgical tools, and in particular to an absorbable anchoring device with a development function. Background Art

[0002] During exercise, people may suffer from ligament damage or rupture. In this case, the ligaments at the joints need to be treated. During the ligament repair process, anchoring devices are used to fix the ligaments to the bone structure. Anchoring devices usually use anchors, which are implants used to fix the tendon or ligament bone blocks to the femoral and tibial bone tunnels during ligament reconstruction. When fixing the ligaments during ligament repair, holes are first drilled in the bones. After the drilling is completed, anchors are installed in the holes. The anchors do not protrude beyond the bone surface. Wires are inserted at both ends of the new ligaments. The new ligaments are placed in the joints, and the ends of the wires are passed through the anchors. After pre-tensioning, they are tied with knots and fixed outside the anchors.

[0003] With respect to the above-mentioned related technologies, the inventors found that a general anchor is provided with threads. When the anchor is screwed into a drill hole, the anchor will self-tap an internal thread on the inner wall of the drill hole and connect with the bone thread. During the screwing process, secondary damage may be caused to the bone tissue. Utility Model Content

[0004] In order to reduce the secondary damage caused by the anchoring device to the human body, the present application provides an absorbable anchoring device with a developing function.

[0005] The absorbable anchoring device with a developing function provided in the present application adopts the following technical solution:

[0006] An absorbable anchoring device with a developing function, comprising:

[0007] The nail body is provided with receiving holes penetrating at both ends;

[0008] A movable shaft is slidably arranged in the nail body, and a convex ring is arranged on the outer side wall;

[0009] A push rod is slidable along the radial direction of the nail body and penetrates the nail body;

[0010] When the movable shaft moves axially, the convex ring is used to push the ejector rod in a direction away from the movable shaft.

[0011] By adopting the above technical solution, the anchoring device is installed into the hole drilled in the bone, and the movable shaft is moved so that the convex ring pushes the push rod out and presses it against the side wall of the bone hole, thereby completing the anchoring effect of the anchoring device in the bone hole. The ligament line is passed through the nail body and knotted to complete the fixation of one end of the ligament, without causing additional damage to the bone, thereby reducing the secondary damage caused to the human body by the anchoring device.

[0012] Optionally, one end of the movable shaft close to the nail head of the nail body is coaxially threadedly connected to the nail body.

[0013] By adopting the above technical solution, the movable shaft can be rotated to make the movable shaft relatively translate in the axial direction relative to the nail body, so that the convex ring pushes the push rod out of the nail body and presses against the inner wall of the bone hole.

[0014] Optionally, the movable shaft is provided with thread holes penetrating at both ends, and a thread locking piece is provided at one end of the movable shaft away from the nail head of the nail body.

[0015] By adopting the above technical solution, the wire for piercing the ligament can pass through the wire hole and be tied to the wire locking piece. The wire locking piece can prevent the wire from being tied into the joint by the ligament, so that the ligament remains in the correct position.

[0016] Optionally, the wire locking member includes a circular frame embedded in the movable shaft and a wire binding post connected to the frame.

[0017] By adopting the above technical solution, the wire binding column 42 can facilitate the wire binding at both ends of the ligament. The circular frame 41 is embedded on the movable shaft 2. When the ligament twists, the wire can only drive the wire locking piece 4 to rotate, and will not cause the movable shaft 2 to rotate and affect the anchoring effect of the anchoring device.

[0018] Optionally, a screwing groove is provided at one end of the movable shaft away from the nail head of the nail body.

[0019] By adopting the above technical solution, the screw groove is used for the surgeon to screw the movable shaft to adjust the position of the movable shaft, which is convenient and quick.

[0020] Optionally, an angle is provided between an end surface of the push rod close to the movable axis and the central axis of the nail body.

[0021] By adopting the above technical solution, the convex ring on the movable shaft contacts an inclined surface when it abuts against the push rod. The convex ring continues to move and pushes the push rod radially outward along the nail body. The different slopes of the inclined surface correspond to different speeds at which the push rod is ejected, which makes it easier for the surgeon to adjust the tightness of the push rod against the inner wall of the bone hole.

[0022] Optionally, an anti-slip protrusion is provided at one end of the push rod away from the movable shaft.

[0023] By adopting the above technical solution, the anti-slip protrusion can increase the friction between the push rod and the inner wall of the bone hole, so that the entire anchoring device is fixed in the bone hole more firmly and is not easy to loosen.

[0024] Optionally, the nail body is provided with micro holes penetrating in the radial direction.

[0025] By adopting the above technical solution, tissue fluid in the joint can enter the anchoring device through the micropores, inducing new bone to grow on the surface and internal structure of the anchoring device, and finally causing the anchoring device to be absorbed by the bones.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. Install the anchor device into the hole drilled in the bone, move the movable shaft so that the convex ring pushes the push rod out and presses against the side wall of the bone hole, so as to complete the anchoring function of the anchor device in the bone hole. Pass the ligament line through the nail body and tie a knot to complete the fixation of one end of the ligament, which will not cause additional damage to the bone and reduce the secondary damage caused by the anchor device to the human body;

[0028] 2. The wire binding column can facilitate the wire binding at both ends of the ligament. The round frame is embedded in the movable shaft. When the ligament twists, the wire can only drive the wire locking piece to rotate, and will not cause the movable shaft to rotate to affect the anchoring effect of the anchoring device;

[0029] 3. The anti-slip protrusion can increase the friction between the push rod and the inner wall of the bone hole, making the entire anchoring device more firmly fixed in the bone hole and not easy to loosen;

[0030] 4. The micropores allow tissue fluid in the joint to enter the anchoring device through the micropores, inducing new bone to grow on the surface and internal structure of the anchoring device, and ultimately causing the anchoring device to be absorbed by the bones. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0032] Figure 2 is a cross-sectional schematic diagram of an embodiment of the present application;

[0033] In the figure, 1, nail body; 11, micro hole; 2, movable shaft; 21, convex ring; 22, wire hole; 23, screw groove; 3, push rod; 31, anti-slip protrusion; 4, wire locking piece; 41, frame; 42, wire binding column. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1 -Attached Figure 2 , further details of this application are given.

[0035] The present application proposes an absorbable anchoring device with a developing function, referring to Figure 1 and Figure 2, including a nail body 1, a movable shaft 2, a push rod 3 and a wire locking member 4. The nail body 1 is provided with a receiving hole along the axial direction; the push rod 3 is provided with multiple, and is radially slidably penetrated on the nail body 1, and can be pressed against the inner wall of the bone hole by extending out of the outer wall of the nail body 1; the movable shaft 2 is penetrated in the nail body 1, and is provided with a through-wire hole 22 along the axial direction, and a convex ring 21 is provided at one end, which is used to push the push rod 3 out of the nail body 1; the wire locking member 4 is embedded in the movable shaft 2, and is used to fix the wires inserted at both ends of the ligament. The anchoring device is installed into the hole drilled in the bone, and the movable shaft 2 is moved so that the convex ring 21 pushes the push rod 3 out and presses against the side wall of the bone hole, so that the anchoring function of the anchoring device in the bone hole can be completed, and the ligament wire can be passed through the nail body 1 and tied to complete the fixation of one end of the ligament, which will not cause additional damage to the bone and reduce the secondary damage caused by the anchoring device to the human body. The anchoring device of the present application is made of an absorbable material and is added with a developable component, thereby ensuring that the anchoring device of the present application can display images under radiation.

[0036] The nail body 1 is a column, and the area of ​​the cross section at one end of the top gradually decreases in the direction away from this end, and the other end is cylindrical. The nail body 1 is provided with a receiving hole with two ends penetrating along the central axis direction. The receiving hole is a stepped hole. The part near the nail head end has a smaller diameter and is provided with an internal thread, and the part near the cylindrical end has a larger diameter. The nail body 1 is provided with micropores 11 that penetrate the side wall of the nail body 1 in the radial direction. The micropores 11 are evenly spaced along the circumferential side wall of the nail body 1 and are also evenly spaced along the central axis direction of the nail body 1. The micropores 11 can allow tissue fluid in the joint to enter the anchoring device through the micropores 11, induce new bone to grow on the surface and internal structure of the anchoring device, and finally allow the anchoring device to be absorbed by the bone. One end of the nail head of the nail body 1 is provided with a rounded corner.

[0037] The push rod 3 passes through the nail body 1 and is slidably arranged on the nail body 1. A right-angled trapezoidal pushing portion is provided at one end of the push rod 3 close to the central axis of the nail body 1, with the hypotenuse end surface facing the cylindrical end of the nail body 1, and a rectangular abutting portion is provided at the other end. The longitudinal section of the pushing portion is larger than the longitudinal section of the abutting portion, so that the pushing portion cannot be separated from the nail body 1 when sliding on the nail body 1. An anti-skid protrusion 31 is provided on the side where the abutting portion abuts against the bone hole. The longitudinal section of the anti-skid protrusion 31 is semicircular and adapted to the curvature of the inner wall of the bone hole, which can increase the friction between the inner wall of the bone hole and the anchoring device, so that the entire anchoring device is fixed in the bone hole more firmly and is not easy to loosen.

[0038] In the embodiment of the present application, four groups of push rods 3 are provided along the axial direction of the nail body 1 , and each group is provided with four push rods 3 along the circumferential direction of the nail body 1 , providing sixteen push rods 3 .

[0039] The movable shaft 2 is a cylindrical shaft body, which is inserted into the nail body 1. One end is provided with an external thread, which is threadedly connected to the nail head end of the nail body 1; the other end is provided with a screwing portion with a larger diameter, and the diameter of the screwing portion is the same as the diameter of the receiving hole. The movable shaft 2 and the nail body 1 can be relatively moved axially by rotating the screwing portion. A convex ring 21 is integrally formed on the circumferential side wall of the movable shaft 2. The longitudinal section of the convex ring 21 is gate-shaped, and the side away from the central axis of the movable shaft 2 is arc-shaped, which is used to abut against the inclined surface of the pushing portion of the push rod 3 to push the push rod 3 away from the movable shaft 2.

[0040] The movable shaft 2 is provided with a through thread hole 22 coaxially along the axial direction for the thread for ligament puncture to pass through. The movable shaft 2 is provided with a circular groove coaxially at one end close to the cylindrical end of the nail body 1 for the thread locking member 4 to be embedded, and is also provided with a screwing groove 23, which is a cross-shaped groove for the surgeon to screw the movable shaft 2 to adjust the position of the movable shaft 2, which is convenient and quick.

[0041] The wire locking member 4 includes a frame 41 and a wire binding post 42. The frame 41 is circular and annular, and its longitudinal section is rectangular. The frame 41 is integrally formed with a wire binding post 42, which is a cylinder and is arranged along the radial direction of the frame 41, and is used to bind and fix the wires for ligament piercing. The wire binding post 42 can facilitate the wire binding at both ends of the ligament. The circular frame 41 is embedded in the movable shaft 2. When the ligament is twisted, the wire can only drive the wire locking member 4 to rotate, and will not cause the movable shaft 2 to rotate to affect the anchoring effect of the anchoring device.

[0042] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An absorbable anchoring device with a developing function, characterized in that: include: The nail body (1) is provided with receiving holes penetrating at both ends; A movable shaft (2) is slidably disposed in the nail body (1), and a convex ring (21) is provided on the outer side wall; A push rod (3) is slidable in the radial direction of the nail body (1) and penetrates the nail body (1); When the movable shaft (2) moves in the axial direction, the convex ring (21) is used to push the push rod (3) in a direction away from the movable shaft (2).

2. The absorbable anchoring device with a developing function according to claim 1, characterized in that: One end of the movable shaft (2) close to the nail head of the nail body (1) is coaxially threadedly connected to the nail body (1).

3. The absorbable anchoring device with a developing function according to claim 2, characterized in that: The movable shaft (2) is provided with thread holes (22) passing through at both ends, and a thread locking member (4) is provided at one end of the movable shaft (2) away from the nail head of the nail body (1).

4. The absorbable anchoring device with a developing function according to claim 3, characterized in that: The wire locking member (4) comprises a circular frame (41) embedded in the movable shaft (2) and a wire binding post (42) connected to the frame (41).

5. The absorbable anchoring device with a developing function according to claim 2, characterized in that: An end of the movable shaft (2) away from the nail head of the nail body (1) is provided with a screwing groove (23).

6. The absorbable anchoring device with a developing function according to claim 1, characterized in that: An angle is provided between an end surface of the push rod (3) close to the movable shaft (2) and the central axis of the nail body (1).

7. The absorbable anchoring device with a developing function according to claim 1, characterized in that: An anti-slip protrusion (31) is provided at one end of the push rod (3) away from the movable shaft (2).

8. The absorbable anchoring device with a developing function according to claim 1, characterized in that: The nail body (1) is provided with micro-holes (11) penetrating in the radial direction.

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