Anterior cruciate ligament bone tunnel cushion block

Abstract

The invention belongs to the technical field of anterior cruciate ligament bone tunnel repair, and particularly relates to an anterior cruciate ligament bone tunnel cushion block. Comprising a cushion block body, one side of the cushion block body is a working face used for making contact with a reconstructed anterior cruciate ligament, the other side of the cushion block body is a fixing face used for making contact with the side wall of a bone tunnel and being fixed, the working face and the fixing face of the cushion block body are both curved faces, and screw holes are formed in the end face of the cushion block body. And screws for temporarily fixing the cushion block body are mounted in the screw holes. By implanting the cushion block body into the bone tunnel, the purpose of repairing the bone tunnel can be achieved, the bone tunnel can be restored to the original size and shape, the position of the reconstructed anterior cruciate ligament can be corrected, and it is guaranteed that the anterior cruciate ligament can achieve normal functions.

Description

Technical Field

[0001] The invention belongs to the technical field of anterior cruciate ligament bone tunnel repair, and in particular relates to an anterior cruciate ligament bone tunnel pad. Background Art

[0002] Anterior cruciate ligament injury of the knee is one of the most common and serious sports injuries. Anterior cruciate ligament tear causes knee instability, and improper treatment will cause serious dysfunction of the knee joint. Due to the large violence of the injury, it is often combined with other major structural injuries. Improper diagnosis and treatment will delay treatment. At the same time, due to the increasing attention paid to the mechanical function of the anterior cruciate ligament and the functional instability caused by the injury, the knee joint cannot meet the needs of daily life and exercise, and can lead to a series of sequelae of the knee joint. Therefore, surgical treatment should be performed to reconstruct the ligament and its function.

[0003] In anterior cruciate ligament reconstruction surgery, the tibial bone tunnel and femoral bone tunnel are first made at the upper and lower stop points of the anterior cruciate ligament through arthroscopy, and then the new anterior cruciate ligament substitute is installed at the original position of the anterior cruciate ligament, with both ends placed in the bone tunnel, and the moved anterior cruciate ligament substitute is fixed at the upper and lower stop points, so that it replaces the original anterior cruciate ligament and plays the role of connecting the thigh bone and the calf bone again. However, after anterior cruciate ligament reconstruction, after long-term exercise use by the patient, the bone tunnel may expand in diameter and deform due to long-term friction with the anterior cruciate ligament substitute, resulting in the displacement of the position of the anterior cruciate ligament substitute. This is the most common and difficult problem to deal with in cruciate ligament revision surgery, and an implant is needed to restore the anatomical shape and position of the bone tunnel. Summary of the invention

[0004] In view of the problems existing in the above-mentioned prior art, the present invention discloses an anterior cruciate ligament bone tunnel pad, and specifically discloses the following technical solutions:

[0005] A pad for anterior cruciate ligament bone tunnel comprises a pad body, one side of the pad body is a working surface for contacting the reconstructed anterior cruciate ligament, the other side of the pad body is a fixing surface for contacting and fixing the side wall of the bone tunnel, the working surface and the fixing surface of the pad body are both curved surfaces, a screw hole is provided on the end surface of the pad body, and the screw hole is used to install a screw for temporarily fixing the pad body.

[0006] Furthermore, the screw hole is a through hole inclined toward the fixing surface of the cushion block body, and one end of the screw hole is located on the end surface of the cushion block body, and the other end is located on the fixing surface of the cushion block body.

[0007] Furthermore, the angle between the screw hole and the axial direction of the medullary canal is 10-20°.

[0008] Furthermore, a plurality of micro holes are evenly arranged on the fixing surface of the cushion block body.

[0009] Furthermore, the working surface of the pad body is a smooth curved surface.

[0010] Furthermore, the pad body is made of titanium alloy.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] By implanting the pad body of the present invention into the bone tunnel, the purpose of repairing the bone tunnel can be achieved, so that the bone tunnel can be restored to its original size and shape, thereby correcting the position of the reconstructed anterior cruciate ligament and ensuring that it can achieve normal function;

[0013] The pad body is provided with screw holes for installing screws, so that the pad body can be temporarily fixed in the bone tunnel to prevent it from falling or moving;

[0014] A plurality of micropores are evenly arranged on the fixing surface of the pad body, which can facilitate the growth of human bone tissue into the micropores, thereby ensuring that the pad body and the side wall of the bone tunnel can be firmly fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A structural schematic diagram of the present invention from one perspective.

[0016] Figure 2 This is a structural schematic diagram of the present invention from another perspective.

[0017] Figure 3 It is a schematic diagram after the present invention is installed in the medullary canal.

[0018] 1-working surface, 2-fixing surface, 3-screw hole, 4-medullary canal. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Reference Figure 1-3A anterior cruciate ligament bone tunnel pad comprises a pad body, one side of the pad body is a working surface 1 for contacting the reconstructed anterior cruciate ligament, the other side of the pad body is a fixing surface 2 for contacting and fixing the side wall of the bone tunnel, the working surface 1 and the fixing surface 2 of the pad body are both curved surfaces, and the working surface 1 is an inwardly concave surface, and the fixing surface 2 is an outwardly convex surface, a screw hole 3 is provided on the end surface of the pad body, the screw hole 3 is used to install a screw for temporarily fixing the pad body, and the end of the working surface 1 away from the end surface gradually approaches the end of the fixing surface 2 away from the end surface.

[0021] In this embodiment, the screw hole 3 is a through hole inclined toward the fixing surface 2 of the pad body, and one end of the screw hole 3 is located on the end surface of the pad body, and the other end is located on the fixing surface 2 of the pad body. The screw hole 3 is arranged obliquely, which can facilitate the installation of screws on the pad body without hindering the movement of the reconstructed anterior cruciate ligament.

[0022] In this embodiment, the angle between the screw hole 3 and the axial direction of the medullary canal 4 is 10-20°, so as to ensure that the movement of the reconstructed anterior cruciate ligament will not be hindered after the screw is inserted into the screw hole.

[0023] In this embodiment, a plurality of micropores are evenly arranged on the fixing surface 2 of the pad body, which can facilitate the growth of human bone tissue into the micropores, thereby ensuring that the pad body and the side wall of the bone tunnel can be firmly connected and fixed.

[0024] In this embodiment, the working surface 1 of the pad body is a smooth curved surface, which can reduce friction and increase the service life of the pad body and the reconstructed anterior cruciate ligament.

[0025] In this embodiment, the pad body is made of titanium alloy, which has high strength and good wear resistance, and can ensure the service life of the pad body.

[0026] The pads in the present invention can be customized according to specific circumstances, or they can be mass-produced according to certain standards. The customized pads can be directly installed in the corresponding bone tunnels for use. Before the use of the mass-produced pads, the bone tunnels need to be simply repaired. After they are repaired into an appropriate shape, the installation of the pads can be completed.

[0027] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An anterior cruciate ligament bone tunnel pad, characterized in that: It includes a pad body, one side of which is a working surface for contacting the reconstructed anterior cruciate ligament, and the other side of which is a fixing surface for contacting and fixing the side wall of the bone tunnel. Both the working surface and the fixing surface of the pad body are curved surfaces, and a screw hole is provided on the end surface of the pad body, and the screw hole is used to install a screw for temporarily fixing the pad body.

2. The anterior cruciate ligament bone tunnel spacer according to claim 1, characterized in that: The screw hole is a through hole inclined toward the fixing surface of the cushion block body, and one end of the screw hole is located on the end surface of the cushion block body, and the other end is located on the fixing surface of the cushion block body.

3. The anterior cruciate ligament bone tunnel spacer according to claim 2, characterized in that: The angle between the screw hole and the axial direction of the medullary canal is 10-20°.

4. The anterior cruciate ligament bone tunnel spacer according to claim 1, characterized in that: A plurality of micro holes are evenly arranged on the fixing surface of the cushion block body.

5. The anterior cruciate ligament bone tunnel spacer according to claim 1, characterized in that: The working surface of the cushion block body is a smooth curved surface.

6. The anterior cruciate ligament bone tunnel spacer according to claim 1, characterized in that: The cushion block body is made of titanium alloy.

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