Artificial ligament graft and implantation method thereof

Abstract

The present invention provides an artificial ligament graft and an implantation method thereof, comprising a ligament net and a telescopic adjustment fixing device, wherein the end of the ligament net is connected to the telescopic adjustment fixing device and then rolled up to form a cylindrical ligament, the telescopic adjustment fixing device is located at the end of the cylindrical ligament, and the telescopic adjustment fixing device comprises a suture and a suture plate, wherein the suture connects the ligament net and the suture plate. The present invention uses a suture and a suture plate to form a telescopic adjustment fixing device, which can adjust the length and tightness of the artificial ligament graft on the one hand, and can be directly suspended and fixed by the suture plate on the other hand, without the need for additional screws for extrusion and fixation.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an artificial ligament graft and an implantation method thereof. Background Art

[0002] ACL (anterior cruciate ligament) reconstruction grafts can be divided into autologous ligament grafts, allogeneic ligament grafts and artificial ligament grafts according to their sources. However, whether it is autologous tissue or allogeneic tissue, there is a reshaping process after surgery, so strenuous activities cannot be participated in for a long time after surgery. Artificial ligament grafts are artificial grafts developed to avoid the shortcomings of the above-mentioned autologous and allogeneic grafts. They can effectively avoid the problem of insufficient strength of autologous or allogeneic ligaments. More importantly, based on the high strength of the physical properties of artificial ligament grafts, patients can quickly resume normal activities to carry out normal sports and life. At present, in addition to artificial ligaments, artificial ligament grafts often need to be equipped with interface screws, sutures, and suture plates (buckles) during surgery to complete the entire operation. The use of these equipment is often limited to problems such as their own length, and doctors need to make good preparations before surgery to ensure that the artificial ligament is implanted in place.

[0003] The patent document with the publication number CN110141398A discloses a method for preparing an artificial ligament, wherein a filamentary artificial material is braided and twisted into a rope-like object, and then twisted into an artificial ligament. The braid is made of 15-25 filamentary artificial materials as a bundle, 3 bundles are twisted into one strand, and then 3-4 strands are braided into a braid; the twisted rope-like object is made of 15-25 filamentary artificial materials as a bundle, 3 bundles are twisted into one strand, and 3 strands are twisted into one rope. The artificial ligament obtained by the artificial ligament braiding method of the patent document has good mechanical properties, and its mechanical properties are relatively close to the autologous ACL, and the tensile length of each ligament is better than the autologous ACL; the artificial ligament braiding structure can ensure that the ligament can respectively meet the requirements of maintaining the front-back and complex rotational stability of the knee joint. However, the mechanical properties of each position of the entire ligament in the patent document are the same, and it is not considered that the ligament in the joint cavity has a larger range of motion, and the ligament needs to be relatively sparse to facilitate the movement of the joint. In addition, the length of the ligament implant cannot be adjusted during surgery, and fixation requires additional fixings. Summary of the invention

[0004] In view of the defects in the prior art, the object of the present invention is to provide an artificial ligament graft and an implantation method thereof.

[0005] According to one aspect of the present invention, an artificial ligament graft is provided, comprising a ligament mesh and a telescopic adjustment fixture. The end of the ligament mesh is connected to the telescopic adjustment fixture and then rolled up to form a cylindrical ligament. The telescopic adjustment fixture is located at the end of the cylindrical ligament. The telescopic adjustment fixture comprises a suture and a suture plate. The suture connects the ligament mesh and the suture plate.

[0006] Preferably, the suture plate comprises two suture holes, a first suture hole and a second suture hole; and both ends of the ligament mesh are connected with telescopic adjustment fixing devices.

[0007] Preferably, after one end of the suture passes through the first suture hole from one side of the suture plate, it passes through the pores of the ligament mesh from one side, and passes through the pores of the ligament mesh from the other side of the ligament mesh back to one side of the ligament mesh, forming a first loop on the other side of the ligament mesh, and the returned suture passes through the suture holes on the suture plate from the other side of the suture plate and passes out from one side of the suture plate;

[0008] The other end of the suture passes through the second suture hole from one side of the suture plate, then passes through the pores of the ligament mesh from one side, and after passing through the first coil on the other side of the ligament mesh, passes back through the pores of the ligament mesh from the other side of the ligament mesh to one side of the ligament mesh, forming a second coil on the other side of the ligament mesh, the first coil and the second coil are interlocked, and the returned suture passes through the suture holes on the suture plate from the other side of the suture plate and passes out from one side of the suture plate.

[0009] Preferably, one end of the suture is inserted into the same pore as or a different pore as that of the ligament mesh;

[0010] The other end of the suture is passed through the same pore as or a different pore as that of the condylar ligament mesh.

[0011] Preferably, after one end of the suture passes through the first suture hole from one side of the suture plate, it passes through the pores of the ligament mesh from one side of the ligament mesh, and passes through the pores of the ligament mesh back to one side of the ligament mesh from the other side of the ligament mesh. The pores through which the suture enters and passes back to the ligament mesh are different. The returned suture passes through the suture holes on the suture plate from the other side of the suture plate and passes out from one side of the suture plate.

[0012] After the other end of the suture passes through the second suture hole from one side of the suture plate, it passes into the pores of the ligament mesh from one side of the ligament mesh, and passes back to the one side of the ligament mesh from the pores of the ligament mesh from the other side of the ligament mesh. The pores through which the suture enters and passes back through the ligament mesh are different. The returned suture passes into the suture holes on the suture plate from the other side of the suture plate and exits from one side of the suture plate.

[0013] Preferably, the two ends of the ligament net are woven nets that are staggered horizontally and vertically, and the middle of the ligament net is longitudinal free wire, and the length direction of the longitudinal free wire is along the axial direction of the cylindrical ligament.

[0014] Preferably, the ligament mesh is woven from polyethylene terephthalate material.

[0015] Preferably, the suture is made of ultra-high molecular weight polyethylene material.

[0016] Preferably, the suture plate is made of titanium plate.

[0017] According to another aspect of the present invention, a method for implanting an artificial ligament graft is provided, using the artificial ligament graft, comprising the following steps:

[0018] Step 1: drilling bone holes on two bones corresponding to the joint cavity respectively, wherein the radial dimension of the bone holes is larger than the width of the suture plate and smaller than the length of the suture plate, and the suture plate can pass through the bone holes;

[0019] Step 2: Put a traction line on the suture plate at the end of the artificial ligament graft, and the traction line enters from the first suture hole on one side of the suture plate and exits from the second suture hole on the other side of the suture plate;

[0020] Step 3: transplanting the two ends of the artificial ligament graft into the bone holes of the two bones respectively through the traction line, and making the longitudinal free wire in the middle of the cylindrical ligament be located in the joint cavity and the suture plate be located outside one end of the bone holes of the two bones away from the joint cavity, and fixing the position of the artificial ligament graft by clamping the suture plate outside the bone holes of the two bones;

[0021] Step 4: Adjust the length and tightness of the artificial ligament graft by retracting and releasing the sutures on the suture plates at both ends of the artificial ligament graft;

[0022] Step 5: After adjusting the length and tightness of the artificial ligament implant, tie knots at both ends of the sutures on the external suture plates of the two bone holes, cut off the excess sutures, remove the traction wire, and complete the implantation.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The structure of the present invention is simple and reasonable, and the length and tightness of the artificial ligament graft after implantation can be adjusted during surgery through the telescopic adjustment fixing device, without the need for the doctor to calculate the precise length of the implantation before the surgery, while avoiding the problem of the doctor's inaccurate estimation of the implantation length and the need for re-implantation.

[0025] 2. The present invention uses sutures and suture plates to form a telescopic adjustment fixing device, which can adjust the length and tightness of the artificial ligament graft on the one hand, and can directly suspend and fix it through the suture plate on the other hand without the need for additional squeezing and fixing with screws.

[0026] 3. The middle part of the ligament net of the present invention adopts longitudinal free wires. The middle part of the cylindrical ligament formed after the ligament net is rolled up is implanted into the joint cavity. The sparse ligaments in the middle part are more conducive to the movement of the joint than the ligaments at the two ends. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0028] Figure 1 This is a schematic diagram of the artificial ligament implant of the present invention after being implanted into a joint.

[0029] Figure 2 It is a schematic diagram of the connection between the suture and the ligament mesh of the present invention.

[0030] Figure 3 It is a process diagram of the suture of the present invention passing through the ligament mesh and the suture plate, in which the ligament mesh is not drawn.

[0031] Figure 4 This is an embodiment of the implantation method of the present invention.

[0032] The figure shows:

[0033] 1—suture, 2—suture plate, 3—ligament mesh. DETAILED DESCRIPTION

[0034] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0035] According to one aspect of the present invention, there is provided an artificial ligament graft, such as Figure 1-3 As shown, it includes a ligament net and a telescopic adjustment fixing device. The end of the ligament net is connected to the telescopic adjustment fixing device and then rolled up to form a cylindrical ligament. The telescopic adjustment fixing device is located at the end of the cylindrical ligament. The telescopic adjustment fixing device includes sutures and a suture plate. The sutures connect the ligament net and the suture plate. The suture plate includes two suture holes, a first suture hole and a second suture hole. Both ends of the ligament net are connected to the telescopic adjustment fixing device.

[0036] In one embodiment, Figure 2-3As shown, after one end of the suture passes through the first suture hole from one side of the suture plate, it passes into the pores of the ligament mesh from one side, and passes back to the one side of the ligament mesh through the pores of the ligament mesh from the other side of the ligament mesh, forming a first coil on the other side of the ligament mesh, and the returned suture passes into the suture holes (the first suture hole or the second suture hole) on the suture plate from the other side of the suture plate and passes out from one side of the suture plate; after the other end of the suture passes through the second suture hole from one side of the suture plate, it passes into the pores of the ligament mesh from one side of the suture plate, and after passing through the first coil on the other side of the ligament mesh, it passes back to the one side of the ligament mesh through the pores of the ligament mesh from the other side of the ligament mesh, forming a second coil on the other side of the ligament mesh, the first coil is interlocked with the second coil, and the returned suture passes into the suture holes (the first suture hole or the second suture hole) on the suture plate from the other side of the suture plate and passes out from one side of the suture plate. One end of the suture is inserted into the same pore or different pores as the pores of the ligament mesh; the other end of the suture is inserted into the same pore or different pores as the pores of the ligament mesh. The first coil and the second coil are adjustable coils, and the two adjustable coils are directly fixed in the artificial ligament mesh. By pulling the ends of the sutures at both ends of the suture on the suture board, the coils can be shrunk, thereby adjusting the length and tightness of the implant.

[0037] In another embodiment, after one end of the suture passes through the first suture hole from one side of the suture plate, it passes through the pores of the ligament mesh from one side, and passes through the pores of the ligament mesh from the other side of the ligament mesh back to the one side of the ligament mesh. The pores through which the suture enters and passes back through the ligament mesh are different, and the returned suture passes through the suture holes (the first suture hole or the second suture hole) on the suture plate from the other side of the suture plate and passes out from one side of the suture plate; after the other end of the suture passes through the second suture hole from one side of the suture plate, it passes through the pores of the ligament mesh from one side, and passes through the pores of the ligament mesh from the other side of the ligament mesh back to the one side of the ligament mesh. The pores through which the suture enters and passes back through the ligament mesh are different, and the returned suture passes through the suture holes (the first suture hole or the second suture hole) on the suture plate from the other side of the suture plate and passes out from one side of the suture plate. The first coil and the second coil are coils of adjustable size. The two coils of adjustable length are directly fixed in the artificial ligament mesh. By pulling the thread ends of the sutures at both ends of the suture plate, the coils can be made smaller, thereby adjusting the length and tightness of the implant.

[0038] The two ends of the ligament net are woven nets that are interlaced horizontally and vertically, and the middle of the ligament net is a longitudinal free wire. The length direction of the longitudinal free wire is along the axial direction of the cylindrical ligament, and the sparse longitudinal free wire in the middle is conducive to the movement of the leg. The ligament net is woven with polyethylene terephthalate material. The suture is made of ultra-high molecular weight polyethylene material. The suture plate is made of titanium plate.

[0039] The artificial ligament graft of the present invention is suitable for transplantation of anterior cruciate ligament full internal reconstruction (both the femoral end and the tibial end are suspended and fixed), the fixing device of the present invention is integrated with the artificial ligament, and the length can be adjusted to adapt to the fixed position, and the implantation can be performed after drilling during the operation, which can greatly shorten the operation time and reduce the doctor's operation. The suture plate is suspended and fixed at both ends of the joint bone, replacing the traditional artificial ligament extrusion screw fixation method, improving the phenomenon of screw loosening and ligament relaxation.

[0040] According to another aspect of the present invention, a method for implanting an artificial ligament graft is provided, using the artificial ligament graft, comprising the following steps:

[0041] Step 1: drilling bone holes on two bones corresponding to the joint cavity respectively, wherein the radial dimension of the bone holes is larger than the width of the suture plate and smaller than the length of the suture plate, and the suture plate can pass through the bone holes;

[0042] Step 2: Put a traction line on the suture plate at the end of the artificial ligament graft, and the traction line enters from the first suture hole on one side of the suture plate and exits from the second suture hole on the other side of the suture plate;

[0043] Step 3: transplanting the two ends of the artificial ligament graft into the bone holes of the two bones respectively through the traction line, and making the longitudinal free wire in the middle of the cylindrical ligament be located in the joint cavity and the suture plate be located outside one end of the bone holes of the two bones away from the joint cavity, and fixing the position of the artificial ligament graft by clamping the suture plate outside the bone holes of the two bones;

[0044] Step 4: Adjust the length and tightness of the artificial ligament graft by retracting and releasing the sutures on the suture plates at both ends of the artificial ligament graft;

[0045] Step 5: After adjusting the length and tightness of the artificial ligament implant, tie knots at both ends of the sutures on the external suture plates of the two bone holes, cut off the excess sutures, remove the traction wire, and complete the implantation.

[0046] In one embodiment, Figure 4 As shown, the artificial ligament graft is transplanted to the knee joint, and a small hole on the outside and a large hole on the inside are established at the knee by using a positioner and a back-drill. Bone holes are established on the two bones (femur and tibia) corresponding to the knee joint; a new channel is established at the knee, and then the two ends of the artificial ligament graft are pulled from the middle of the knee into the bone holes of the two bones by a traction line; when the artificial ligament graft is pulled into the bone channel position, the position of the artificial ligament graft is fixed by a suture plate clamped on the outside of the bone channel hole, and the length and tightness of the artificial ligament graft implantation are adjusted by pulling the thread ends of the sutures on the suture plate; then the two suture thread ends on the suture plate are knotted and fixed, the excess sutures are cut off, the traction line is removed, and the operation is completed.

[0047] In another embodiment, a traction line is threaded onto the suture plate at one end of the artificial ligament graft, the traction line enters from a first suture hole on one side of the suture plate and exits from a second suture hole on the other side of the suture plate; one end of the artificial ligament graft is passed through the bone channel hole on one bone and exits from the bone channel hole on another bone by the traction line, and the longitudinal free wire in the middle of the cylindrical ligament is located in the joint cavity, and the suture plates at both ends of the artificial ligament graft are clamped on the outside of the bone channel holes of the two bones away from the joint cavity.

[0048] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0049] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. An artificial ligament graft, characterized in that: It comprises a ligament net and a telescopic adjustment fixing device, wherein the end of the ligament net is connected to the telescopic adjustment fixing device and then rolled up to form a cylindrical ligament, the telescopic adjustment fixing device is located at the end of the cylindrical ligament, and the telescopic adjustment fixing device comprises a suture and a suture plate, wherein the suture connects the ligament net and the suture plate; The suture plate comprises two suture holes, a first suture hole and a second suture hole; both ends of the ligament net are connected with telescopic adjustment fixing devices; After one end of the suture passes through the first suture hole from one side of the suture plate, it passes through the pores of the ligament mesh from one side, and passes through the pores of the ligament mesh from the other side of the ligament mesh back to one side of the ligament mesh, forming a first loop on the other side of the ligament mesh, and the returned suture passes through the suture holes on the suture plate from the other side of the suture plate and passes out from one side of the suture plate; The other end of the suture passes through the second suture hole from one side of the suture plate, then passes through the pores of the ligament mesh from one side, and after passing through the first loop on the other side of the ligament mesh, passes through the pores of the ligament mesh from the other side of the ligament mesh back to one side of the ligament mesh, forming a second loop on the other side of the ligament mesh, the first loop and the second loop are interlocked, and the returned suture passes through the suture hole on the suture plate from the other side of the suture plate and passes out from one side of the suture plate; Alternatively, one end of the suture passes through the first suture hole from one side of the suture plate, then passes through the pores of the ligament mesh from one side, and passes back through the pores of the ligament mesh from the other side of the ligament mesh to the one side of the ligament mesh. The pores through which the suture enters and passes back through the ligament mesh are different. The returned suture passes through the suture holes on the suture plate from the other side of the suture plate and passes out from one side of the suture plate. The other end of the suture passes through the second suture hole from one side of the suture plate, then passes through the pores of the ligament mesh from one side, and passes back through the pores of the ligament mesh from the other side of the ligament mesh to the one side of the ligament mesh. The pores through which the suture enters and passes back through the ligament mesh are different. The returned suture passes through the suture holes on the suture plate from the other side of the suture plate and passes out from one side of the suture plate. The two ends of the ligament net are woven nets that are staggered horizontally and vertically, and the middle of the ligament net is a longitudinal free wire, and the length direction of the longitudinal free wire is along the axial direction of the cylindrical ligament.

2. The artificial ligament graft according to claim 1, characterized in that: The ligament net is woven from polyethylene terephthalate material.

3. The artificial ligament graft according to claim 1, characterized in that: The suture is made of ultra-high molecular weight polyethylene material.

4. The artificial ligament graft according to claim 1, characterized in that: The suture plate is a titanium plate.

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