Adjustable knotless orthopedic ligament reconstruction implant

Abstract

The utility model discloses an adjustable knotless orthopedic ligament reconstruction internal implant, which belongs to the technical field of orthopedic implants and comprises a fixing plate, a fixing ring device and a fixing line, and a pair of first threading holes is arranged in the middle of the fixing plate; the fixing ring device comprises a fixing ring and a button fixing piece, the button fixing piece comprises a button body and a retaining ring located on the inner side of the button body, a second threading hole is formed in the retaining ring, a containing groove used for containing the button body is formed in the fixing ring, and a through hole allowing the retaining ring to penetrate out is formed in the bottom wall of the containing groove; the fixing line is wound in the first threading hole and the second threading hole to form a loop ring, the two ends of the fixing line penetrate through the bottom wall of the containing groove and then penetrate out of the containing groove from the side face of the containing groove, and clamping points used for clamping the two ends of the fixing line are formed between the containing groove and the button body. The device is high in tensile strength, accurate in ligament reconstruction positioning and good in fixing effect.

Description

Technical Field

[0001] The utility model relates to the technical field of orthopedic implants, in particular to an adjustable knotless orthopedic ligament reconstruction implant. Background Art

[0002] Ankle sprain is the most common ankle sports injury, mainly anterior tibiofibular ligament injury. Failure to promptly treat the anterior tibiofibular ligament may lead to loss of normal function of the tibiofibular joint and decreased stability. Currently, the ligament repair device commonly used in clinical practice locks the damaged ligament to the bone by tying sutures. Sutures usually need to maintain a certain tension, but during clinical operations, due to the manipulation of the knotted structure, the sutures often rebound or relax by 1mm or more than 1mm, resulting in the suture tension being less than the tension required to achieve fixation, resulting in a decrease in the fixation effect.

[0003] Invention patent application CN111166529A discloses a titanium plate with loops, and utility model patent CN214180709U discloses an absorbable suspension plate. The working principle of these two patents is: first, the ligament graft is passed through the loop and forms a cross-hooking structure with the loop, and then the ligament graft is tied, bound or wrapped and fixed at a specific position of the loop using a fixing component, and finally the loop and the ligament graft are tightened and fixed, thereby locking the damaged ligament to the bone. Research has found that the loops in these two patents are all fixed in length and have a narrow range of application. At the same time, there is still the problem of the aforementioned suture line rebounding or loosening, resulting in a decrease in the fixation effect. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an adjustable knotless orthopedic ligament reconstruction implant with high tensile strength, accurate ligament reconstruction positioning and good fixing effect.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] An adjustable knotless orthopedic ligament reconstruction implant comprises a fixing plate for passing through a bone tunnel and fixed at one end of the bone tunnel, a fixing ring device for fixing at the other end of the bone tunnel, and a fixing wire for passing through the bone tunnel and connecting the fixing plate and the fixing ring device, wherein:

[0007] A pair of first threading holes are provided in the middle of the fixing plate;

[0008] The fixing ring device comprises a fixing ring and a button fixing member, wherein the button fixing member comprises a button body and a buckle ring located inside the button body, a second threading hole is formed inside the buckle ring, and a receiving groove for receiving the button body is provided on the fixing ring, and a through hole for the buckle ring to pass through is provided on the bottom wall of the receiving groove;

[0009] The fixing wire is wound around the pair of first threading holes and the second threading hole to form a loop, and both ends of the fixing wire pass through the bottom wall of the receiving groove and then pass out of the receiving groove from the side of the receiving groove, and a clamping point for clamping the two ends of the fixing wire is formed between the receiving groove and the button body.

[0010] Furthermore, a groove is provided on the outer surface of the fixing plate between the pair of first threading holes.

[0011] Furthermore, the fixing plate is designed with an arc-shaped edge;

[0012] And / or, the pair of first threading holes are both oblong holes extending along the length direction of the fixing plate.

[0013] Furthermore, one end or both ends of the fixing plate are provided with a third threading hole for the traction line to pass through.

[0014] Furthermore, both ends of the first threading hole and the third threading hole are provided with chamfers.

[0015] Furthermore, the inner side wall of the receiving groove and the outer peripheral surface of the button body are designed as arc-shaped inclined surfaces that match each other.

[0016] Furthermore, the bottom wall of the receiving groove is provided with a pair of fourth threading holes on both sides of the through hole for the two ends of the fixing wire to pass through;

[0017] And / or, the inner surface edge of the fixing ring is designed as an arc-shaped edge.

[0018] Furthermore, the outer surface of the button body is a convex arc shape.

[0019] Furthermore, the outer peripheral surface of the button body is provided with a stepped rib.

[0020] Further, the fixing wire is made of polymer wire, metal wire, organic wire, carbon fiber or carbon nanotube;

[0021] And / or, the fixing plate, the fixing ring and the button fixing are all made of stainless steel, titanium or nickel titanium.

[0022] The utility model has the following beneficial effects:

[0023] The utility model discloses an adjustable knotless orthopedic ligament reconstruction implant. During the operation, a pulling force is applied to the two ends of the fixing line at the proximal end. The fixing plate moves along the direction of the fixing ring device under the action of the loop ring of the fixing line, so that the fixing plate is close to the fixing ring device and contacts the bone surface. The length of the fixing line is adjusted by the loop ring, thereby controlling the tension of the adjustable knotless orthopedic ligament reconstruction implant. Compared with the fixed loop ring, the utility model has a wide range of adaptability, high tensile strength, accurate ligament reconstruction positioning, and is more helpful to shorten the operation time and improve the operation efficiency. After the fixing plate and the fixing ring device reach the predetermined position, the fixing line is continuously tightened. The two ends of the fixing line are clamped between the accommodating groove of the fixing ring and the button body of the button fixing piece, and no knotting operation is performed on the fixing line. The tensioning state of the fixing line is maintained by compression and friction at the clamping point. The clamping point can increase the contact surface area between the fixing line and the fixing ring device, reduce the stress on the fixing line, and improve the tensile strength of the fixing line, so as to maximize the tensile strength of the overall structure. The fixing line will not rebound or relax, and the tension of the fixing line can reach the tension required during the operation, thereby improving the locking effect, so as to tightly fix the ligament to be orthopedic to the bone, and the fixation effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the adjustable knotless orthopedic ligament reconstruction implant of the utility model;

[0025] Figure 2 for Figure 1 An enlarged structural diagram of the middle fixed plate;

[0026] Figure 3 for Figure 1 An enlarged structural diagram of the middle fixing ring device;

[0027] Figure 4 for Figure 1 Schematic diagram of the exploded structure of the middle fixing ring device;

[0028] Figure 5 for Figure 1 A schematic cross-sectional view of the structure of the middle fixing ring device;

[0029] Figure 6 The utility model is a schematic diagram of the adjustable knotless orthopedic ligament reconstruction implant in use. DETAILED DESCRIPTION

[0030] In order to make the technical problems to be solved, technical solutions and advantages of the present invention more clear, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0031] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0032] The utility model provides an adjustable knotless orthopedic ligament reconstruction implant. Figure 1-6 As shown, it includes a fixing plate 1 for passing through a bone tunnel and fixed at one end of the bone tunnel, a fixing ring device 2 for fixing at the other end of the bone tunnel, and a fixing wire 3 for passing through the bone tunnel and connecting the fixing plate 1 and the fixing ring device 2, wherein:

[0033] A pair of first threading holes 11 are provided in the middle of the fixing plate 1;

[0034] The fixing ring device 2 includes a fixing ring 21 and a button fixing member 22. The button fixing member 22 includes a button body 221 and a buckle ring 222 located inside the button body 221. A second threading hole 223 is formed inside the buckle ring 222. The fixing ring 21 is provided with a receiving groove 211 for receiving the button body 221. The bottom wall of the receiving groove 211 is provided with a through hole (specifically, it can be an arc shape) 212 for the buckle ring 222 to pass through.

[0035] The fixing line 3 is wound around a pair of first threading holes 11 and second threading holes 223 to form a loop. Both ends 32 and 33 of the fixing line 3 pass through the bottom wall of the receiving groove 211 and then pass out of the receiving groove 211 from the side of the receiving groove 211. A clamping point for clamping the two ends of the fixing line 3 is formed between the receiving groove 211 and the button body 221.

[0036] During assembly, one end of the fixing line 3 first passes through the pair of first threading holes 11 of the fixing plate 1 and the second threading hole 223 of the button fixing member 22, and is wound several times to form a loop 31. Finally, the two ends 32 and 33 of the fixing line 3 pass through the bottom wall of the receiving groove 211 of the fixing ring 21 (at this time, the two ends 32 and 33 of the fixing line 3 can pass through the bottom wall of the receiving groove 211 from the through hole 212, see Figure 5), pass through the receiving groove 211 from the side of the receiving groove 211 (that is, pass through between the receiving groove 211 and the button body 221) to connect the fixing plate 1 and the fixing ring device 2 to complete the assembly; when in use, first pass the fixing plate 1 through the bone tunnel and attach it to a suitable position, then pull the two ends of the fixing line 3, the fixing plate 1 approaches the fixing ring device 2 under the action of the loop 31 and contacts the bone surface, the button body 221 of the button fixing member 22 gradually approaches and enters the receiving groove 211 of the fixing ring 21, after the fixing plate 1 and the fixing ring device 2 reach the predetermined position, continue to tighten the two ends 32, 33 of the fixing line 1, the button body 221 completely enters the receiving groove 211, and forms a clamping point for clamping the two ends of the fixing line 3 between the receiving groove 211, and the compression and friction at the clamping point are used to maintain the tension state of the fixing line 3, so that the ligament to be orthopedic is tightly fixed to the bone.

[0037] For example, when the anterior tibiofibular ligament is injured, holes are drilled on the tibia 200 and the fibula 100 respectively, the fixing ring device 2 is attached to the cortex on the outside of the fibula 100, and the fixing plate 1 is attached to the cortex on the inside of the tibia 200. Then, by tightening the two loose ends 32 and 33 of the fixing line 3, a pulling force is applied to the loop 31 so that the fixing plate 1 is close to the fixing ring device 2 under the action of the loop 31 until the two ends of the bone are pulled together. Then, the loose ends 32 and 33 of the fixing line 3 are fixed to the bone using the clamping point formed between the button body 221 and the receiving groove 211, and the operation is completed (see Figure 6 ).

[0038] The utility model discloses an adjustable knotless orthopedic ligament reconstruction implant. During the operation, a pulling force is applied to the two ends of the fixing line at the proximal end. The fixing plate moves along the direction of the fixing ring device under the action of the loop ring of the fixing line, so that the fixing plate is close to the fixing ring device and contacts the bone surface. The length of the fixing line is adjusted by the loop ring, thereby controlling the tension of the adjustable knotless orthopedic ligament reconstruction implant. Compared with the fixed loop ring, the utility model has a wide range of adaptability, high tensile strength, accurate ligament reconstruction positioning, and is more helpful to shorten the operation time and improve the operation efficiency. After the fixing plate and the fixing ring device reach the predetermined position, the fixing line is continuously tightened. The two ends of the fixing line are clamped between the accommodating groove of the fixing ring and the button body of the button fixing piece, and no knotting operation is performed on the fixing line. The tensioning state of the fixing line is maintained by compression and friction at the clamping point. The clamping point can increase the contact surface area between the fixing line and the fixing ring device, reduce the stress on the fixing line, and improve the tensile strength of the fixing line, so as to maximize the tensile strength of the overall structure. The fixing line will not rebound or relax, and the tension of the fixing line can reach the tension required during the operation, thereby improving the locking effect, so as to tightly fix the ligament to be orthopedic to the bone, and the fixation effect is good.

[0039] The fixing line in the utility model has a first end (i.e., an end close to the fixing plate) and a second end (i.e., an end close to the fixing ring device), and there is a relaxed state defined by a first distance and a tensioned state defined by a second distance between the first end and the second end; when the fixing ring device contacts the bone or tissue, and the fixing plate contacts the bone or tissue, a force in the opposite direction of bone fixation is applied to the fixing line at the clamping point, so that the entire adjustable knotless orthopedic ligament reconstruction implant is transformed from a relaxed state to a tensioned state, a clamping point is formed between the accommodating groove and the button body, and the tensioned state is maintained by the compression and friction force of the clamping point on the fixing line, thereby improving the fixing effect.

[0040] like Figure 1-2 As shown, the outer surface of the fixing plate 1 may be provided with a groove 12 between a pair of first threading holes 11, which not only prevents the loop 31 from protruding from the outer surface of the fixing plate 1 to cause interference, but also prevents the loop 31 from generating shear force on the bone.

[0041] The fixing plate 1 may be designed with an arc-shaped edge to avoid damage to the bones. The pair of first threading holes 11 are preferably oblong holes extending along the length direction of the fixing plate 1. One or both ends of the fixing plate 1 may be provided with a third threading hole 13 for the traction wire 4 to pass through. The design of the third threading hole 13 facilitates the connection of the traction wire 4 to help the doctor adjust the position of the fixing plate 1. Both ends of the first threading hole 11 and the third threading hole 13 may be chamfered to avoid wear on the lead wire.

[0042] like Figure 4-5 As shown, the inner wall of the accommodating groove 211 and the outer peripheral surface of the button body 221 can be designed as mutually matching arc-shaped inclined surfaces, so that the contact surface area between the fixing line 3 and the locking element (i.e., the fixing ring device 2) can be better increased at the clamping point, and the stress on the fixing line 3 can be better reduced, so as to maximize the tensile strength of the fixing line 3 and ensure that the damaged ligament and bone tissue can fit tightly.

[0043] like Figure 4 As shown, the bottom wall of the receiving groove 211 may be provided with a pair of fourth threading holes 213 (specifically, they may be arc-shaped) on both sides of the through hole 212 for the two ends 32, 33 of the fixing wire 3 to pass through, so as to facilitate the two ends of the fixing wire 3 to pass through the bottom wall of the receiving groove 211, so that during assembly, the two ends 32, 33 of the fixing wire 3 can be directly passed through the pair of fourth threading holes 213. The inner surface edge of the fixing ring 21 may be designed as an arc-shaped edge (specifically, it may be designed as a lower arc-shaped inclined surface) to avoid damaging bone tissue.

[0044] like Figure 3As shown, the outer surface of the button body 221 is preferably a convex arc. The outer peripheral surface of the button body 221 can be provided with a step-shaped convex rib (not shown), so that after the button body 221 completely enters the receiving groove 211, the two ends 32 and 33 of the fixing line 3 can be better clamped at the step-shaped convex rib, and the tension state of the fixing line 3 can be better maintained, so that the ligament to be orthopedic is firmly attached to the bone, and the fixing effect is good.

[0045] In the present invention, the fixing wire 3 can be made of fiber or polymer filament, such as polymer filament (such as high molecular weight polyethylene HMWPE, ultra high molecular weight polyethylene UHMWPE, polyethylene terephthalate PET, polytetrafluoroethylene PTFE, polyetheretherketone PEEK, polylactic acid PLA, left-handed polylactic acid PLLA, etc.), metal wire (such as nitinol, titanium, titanium alloy, tantalum, stainless steel, etc.), organic filament (such as collagen, silk, etc.), carbon fiber or carbon nanotube, etc. The fixing plate 1, the fixing ring 21 and the button fixing member 22 can all be made of stainless steel, titanium, nickel titanium or other medical alloys.

[0046] The utility model specifically relates to an adjustable knotless orthopedic joint ligament reconstruction implant. The structural tension generated between the tensioning steps is utilized, and the clamping point applies compression and friction force to the fixing line to achieve firm locking. The clamping point can increase the contact surface area between the fixing line and the fixing ring device, and reduce the stress on the fixing line, thereby improving the tensile strength of the fixing line, maximizing the tensile strength of the overall structure, improving the locking effect, and making the ligament and the bone fit closely. The implant can be used in conjunction with the tibia and fibula plate, and can effectively promote the recovery of joint function, achieve an ideal fixing strength, and achieve a better fixing effect. In the actual operation process, a force opposite to the bone fixing force is applied to the fixing line to resist the load and shear force of tibia / fibula separation. In the locking process, the tensioned fixing line is fixed by the clamping point formed between the accommodating groove and the button body.

[0047] The above is a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An adjustable knotless orthopedic ligament reconstruction implant, characterized in that: The device comprises a fixing plate for passing through a bone tunnel and fixed at one end of the bone tunnel, a fixing ring device for fixing at the other end of the bone tunnel, and a fixing wire for passing through the bone tunnel and connecting the fixing plate and the fixing ring device, wherein: A pair of first threading holes are provided in the middle of the fixing plate; The fixing ring device comprises a fixing ring and a button fixing member, wherein the button fixing member comprises a button body and a buckle ring located inside the button body, a second threading hole is formed inside the buckle ring, and a receiving groove for receiving the button body is provided on the fixing ring, and a through hole for the buckle ring to pass through is provided on the bottom wall of the receiving groove; The fixing wire is wound around the pair of first threading holes and the second threading hole to form a loop, and both ends of the fixing wire pass through the bottom wall of the receiving groove and then pass out of the receiving groove from the side of the receiving groove, and a clamping point for clamping the two ends of the fixing wire is formed between the receiving groove and the button body.

2. The adjustable knotless orthopedic ligament reconstruction implant according to claim 1, characterized in that: A groove is provided on the outer surface of the fixing plate between the pair of first threading holes.

3. The adjustable knotless orthopedic ligament reconstruction implant according to claim 1, characterized in that: The fixing plate is designed with an arc-shaped edge; And / or, the pair of first threading holes are both oblong holes extending along the length direction of the fixing plate.

4. The adjustable knotless orthopedic ligament reconstruction implant according to claim 1, characterized in that: One end or both ends of the fixing plate are provided with a third threading hole for the traction line to pass through.

5. The adjustable knotless orthopedic ligament reconstruction implant according to claim 4, characterized in that: Both ends of the first threading hole and the third threading hole are provided with chamfers.

6. The adjustable knotless orthopedic ligament reconstruction implant according to any one of claims 1 to 5, characterized in that: The inner side wall of the receiving groove and the outer peripheral surface of the button body are designed as arc-shaped inclined surfaces that match each other.

7. The adjustable knotless orthopedic ligament reconstruction implant according to claim 6, characterized in that: The bottom wall of the receiving groove is provided with a pair of fourth threading holes on both sides of the through hole for the two ends of the fixing wire to pass through; And / or, the inner surface edge of the fixing ring is designed as an arc-shaped edge.

8. The adjustable knotless orthopedic ligament reconstruction implant according to claim 6, characterized in that: The outer surface of the button body is in a convex arc shape.

9. The adjustable knotless orthopedic ligament reconstruction implant according to claim 6, characterized in that: The outer peripheral surface of the button body is provided with a stepped convex rib.

10. The adjustable knotless orthopedic ligament reconstruction implant according to claim 6, characterized in that: The fixing wire is made of polymer wire, metal wire, organic wire, carbon fiber or carbon nanotube; And / or, the fixing plate, the fixing ring and the button fixing are all made of stainless steel, titanium or nickel titanium.

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