WO2020118509A1

WO2020118509A1 - Cruciate ligament suspensed internal lock fixator

Info

Publication number: WO2020118509A1
Application number: PCT/CN2018/120235
Authority: WO
Inventors: 卢政昌; 林松彦
Original assignee: 高雄医学大学
Priority date: 2018-12-11
Filing date: 2018-12-11
Publication date: 2020-06-18

Abstract

A cruciate ligament suspended internal lock fixator, which is used to solve the problem in the prior art wherein a ligament implant is prone to loosening after operation and which comprises: a hollow tube body (1) having at least one growth-inducing hole (11) and a non-return structure (14), the at least one growth-inducing hole (11) penetrating an inner wall surface (12) and an outer wall surface (13) of the hollow tube body (1), and the non-return structure (14) being located at the outer wall surface (13) of the hollow tube body (1); and a limiting member (2), which is located within the hollow tube body (1), two ends of the limiting member (2) being connected to the inner wall surface (12).

Description

Internal lock-type fixator with cross strap suspension

Technical field

[0001] The present invention relates to a fixator, and in particular to a cruciate ligament suspension interlocking fixator for cruciate ligament reconstruction surgery.

Background technique

[0002] The knee joint is the largest joint in the body, which is composed of several bones of the femur, tibia, fibula and left bone (commonly known as the knee bone), supporting the weight of the human body, the flexion and extension of the knee. There are multiple ligaments at the knee joint that are responsible for the stability and movement of the knee joint. For example: anterior cruciate ligament (ACL) prevents tibia advancement, posterior cruciate ligament (PCL) prevents tibia backwards, and lateral collateral ligament (LCL) prevents knee varus , Medial collateral ligament (MCL) prevents knee valgus. Among them, the anterior cruciate ligament is an important structure of the knee joint, and the common condition of the anterior cruciate ligament causing injury is a sudden external force exerted on the knee joint to produce a knee valgus, eversion, or excessive straightening distortion, which causes the knee The anterior cruciate ligament in the joint ruptures, and most of them occur in sports injuries, locomotive accidents and falls.

[0003] Both anterior cruciate ligament rupture and injury can be performed by ligament reconstruction through surgery to restore the knee joint to its original mobility and function. Please refer to Figures 1 and 5 for some anterior cruciate ligament fixation methods. First, a ligament implant b is combined with a metal button c, and it is inserted into a femoral tunnel dl through the lateral side of a femur d (as indicated by the arrow direction) Shown), so that the metal button c can be clamped to the outside of the femur d, the ligament implant b is located in the femoral tunnel dl and falls into a tibial tunnel el of a tibia e, and then passes through an interface nail f Penetrating the tibial tunnel el from the lateral side of the tibia e, the ligament implant b can be positioned between the femur d and the tibia e. Summary of the invention

technical problem

[0004] However, in the above existing anterior cruciate ligament fixation method, since the metal button c is positioned outside the femur d, so that the ligament implant b is located in the femoral tunnel dl, the ligament implant b is long In the suspended state at a distance, when the patient uses the site, the ligament implant b is likely to form unstable sway, causing the femoral tunnel dl to expand, which in turn causes the ligament implant b to loosen or tear Phenomenon, leading to poor quality of surgery. [0005] Please refer to FIG. 2, another existing anterior cruciate ligament fixation method, one end of the ligament implant b is inserted into the femoral tunnel dl from the inside of the femur d, the ligament implant b The other end falls into the tibial tunnel el of the tibia e, and then penetrates into the femoral tunnel dl from the inside of the femur d through two interface screws f, and penetrates into the tibial tunnel el from the outside of the tibia e, so that The ligament implant b may be positioned between the femur d and the tibia e. However, this fixation method makes the contact surface of the femoral tunnel dl and the ligament implant b poorly healed, and it is easy to scratch the ligament implant b, resulting in unstable joints after reconstruction, resulting in poor surgical quality.

[0006] In view of this, the anterior cruciate ligament fixation method is still necessary to be improved.

Solution to the problem

Technical solution

[0007] In order to solve the above problems, the object of the present invention is to provide a cruciate ligament suspension interlocking fixator, which can make a ligament implant stable in a femur, to avoid the ligament implant unstable Shaking.

[0008] The object of the present invention is to provide a cruciate ligament suspension interlocking fixator, which can make the ligament implant and the femur have a large area of comprehensive integration.

[0009] The object of the present invention is to provide a cruciate ligament suspension interlocking fixator, which can avoid damage to the ligament implant due to scratches.

[0010] The object of the present invention is to provide a cruciate ligament suspension interlocking fixator, which can improve the convenience of surgery

[0011]

[0012] The cruciate ligament suspension interlocking fixator of the present invention includes: a hollow tube body having at least one inducing growth hole and a check structure, the at least one inducing growth hole penetrating one of the hollow tube bodies An inner wall surface and an outer wall surface, the check structure is located on the outer wall surface of the hollow tube body; and a limiting member is located in the hollow tube body, and both ends of the limiting member are connected to the inner wall surface.

[0013] Accordingly, the cruciate ligament suspension interlocking fixator of the present invention is entirely implanted in the strand tunnel, the backstop structure abuts on the inner wall of the strand tunnel, and the ligament implant can hang and abut on The limiting member enables the ligament implant to be stably located in the strand tunnel, thereby ensuring that the ligament implant does not generate unstable shaking and the situation where the strand tunnel is enlarged, and has improved postoperative quality and The effect of reducing related risks.

[0014] wherein the hollow tube body has a first end and a second end opposite, the first end has a diameter Shrink. In this way, the diameter-reduced portion can penetrate into the strand tunnel, which has the effect of improving the convenience of surgery.

[0015] Wherein, the limiting member has a circular arc portion, the circular arc portion facing the first end of the hollow tube body. In this way, the ligament implant can hang and abut on the arc portion, which has the effect of avoiding damage to the ligament implant due to scratches.

[0016] Wherein, an axis direction is defined between the first end and the second end, and the at least one growth-inducing hole is formed as a strip-shaped hole along the axis direction. In this way, the ligament implant and a femur can be comprehensively combined in a larger area, and the effect of improving the stability of healing after surgery is improved.

[0017] wherein the check structure has a plurality of long inclined surfaces and a plurality of short inclined surfaces, the plurality of short inclined surfaces and the plurality of long inclined surfaces are respectively connected to form a turning portion, each turning portion abuts on the strand of the tunnel Inner wall. In this way, the structure is simple and easy to manufacture, and has the effect of reducing manufacturing costs.

[0018] Among them, the check structure forms an oblique sawtooth shape. This structure is simple and easy to manufacture, and has the effect of reducing manufacturing costs.

[0019] Wherein, the length of the hollow tube is 25-30 mm, which has sufficient length for the ligament implant to be combined, which has the effect of improving the quality of postoperative.

[0020] Wherein, the limiting member is integrally formed with the hollow tube body. In this way, it has the effect of improving the structural strength of the interlocking ligament of the cruciate ligament.

Beneficial effects of invention

Brief description of the drawings

BRIEF DESCRIPTION

[0021] FIG. 1 is a plan view of an existing anterior cruciate ligament fixation method.

[0022] FIG. 2 is a plan view of another existing anterior cruciate ligament fixation method.

[0023] FIG. 3 is a perspective view of a preferred embodiment of the present invention.

4 is a partially cutaway perspective view of a preferred embodiment of the present invention.

[0025] FIG. 5 is a cross-sectional view of a preferred embodiment of the present invention incorporating a ligament implant.

[0026] FIG. 6 is a diagram of a preferred embodiment of the invention.

DESCRIPTION OF REFERENCE NUMERALS

[0028] (The present invention)

1 hollow tube body [0030] la first end lb second end

[0031] 11 induced growth hole 12 inner wall surface

[0032] 13 outer wall surface 14 check structure

14a long inclined surface 14b short inclined surface

[0034] 14c turning part 15 diameter reducing part

[0035] 2 Limiting piece

21 circular arc part

[0037] F Interface Pin

[0038] L Ligament Implant

[0039] P-axis direction

X femur XI femoral tunnel

[0041] Y Tibial Y1 Tibial Tunnel

[0042] (Prior Art)

[0043] b artificial ligament

[0044] c metal buttons

[0045] d femur dl femoral tunnel

[0046] e tibia el shin tunnel

[0047] f interface nail.

The best embodiment of the invention

Best Mode of the Invention

[0048] In order to make the above and other objects, features and advantages of the present invention more obvious and understandable, the preferred embodiments of the present invention are specifically enumerated below, and in conjunction with the drawings, detailed descriptions are as follows:

[0049] The directivity or its approximate terms in the present invention, such as “front”, “back”, “left”, “right”, “upper (top)”, “lower (bottom)”, “inner”, "Outside", "side", etc., mainly refer to the directions of the drawings, and each directivity or its approximate terms are only used to help explain and understand the embodiments of the present invention, not to limit the present invention

[0050] The "joint", "combination", or "assembly" and other similar terms described throughout the present invention mainly include a type that can be separated without damaging the component after connection, or that the component cannot be detached after connection. Common knowledge The person who knows can choose according to the material or assembly requirements of the components to be connected.

[0051] Please refer to FIG. 3, which is a preferred embodiment of the internal ligament of the cruciate ligament suspension of the present invention, including a hollow tube body 1 and a limiting member 2, the limiting member 2 is located in Inside the hollow tube 1.

[0052] Please refer to FIG. 3 and FIG. 4, the hollow tube body 1 may have a first end la and a second end lb opposite, the first end la and the second end lb defined between In one axis direction P, the hollow tube body 1 may be, for example, a square tube or a column of various other shapes. The shape of the hollow tube body 1 is not limited by the present invention. In this embodiment, the hollow tube body 1 1 is described as a circular tube, the length of the hollow tube body 1 is preferably 25 to 30 mm, and the invention is not limited thereto. The hollow tube body 1 has at least one induced growth hole 11 that penetrates an inner wall surface 12 and an outer wall surface 13 of the hollow tube body 1. The at least one induced growth hole 11 may be, for example, a square The size, number, and shape of the at least one growth-inducing hole 11 are not limited by the present invention. In this embodiment, the at least one growth-inducing hole 11 is formed as a strip-shaped hole along the axis direction P. The number of the at least one growth-inducing hole 11 is four.

[0053] The hollow tube body 1 may have a check structure 14 located on the outer wall surface 13 of the hollow tube body 1. In detail, the backstop structure 14 has a plurality of long inclined surfaces 14a and a plurality of short inclined surfaces 14b. The plurality of long inclined surfaces 14a are connected to the outer wall surface 13 of the hollow tube body 1 from the first end la toward the first The direction of the two ends lb extends obliquely. In addition, the plurality of short inclined surfaces 14b are also connected to the outer wall surface 13 of the hollow tube 1 and extend obliquely from the first end la toward the direction of the second end lb. The short inclined surface 14b and the plurality of long inclined surfaces 14a are respectively connected to form a turning portion 14c, so that the check structure 14 can be formed into an inclined saw-tooth shape. In addition, the first end la of the hollow tube body 1 may have a reduced diameter portion 15.

[0054] The limiting member 2 is located inside the hollow tube body 1, the limiting member 2 and the hollow tube body 1 are preferably integrally formed, for example, can be made by 3D printing technology, the present invention is not Be restricted. In detail, the two ends of the limiting member 2 are connected to the inner wall surface 12 of the hollow tube body 1. The limiting member 2 may have an arc portion 21 that faces the hollow tube body 1. The first end la.

[0055] Please refer to FIG. 5, through the foregoing structure, when the cruciate ligament suspension interlocking anchor of the present invention is used, first select a ligament implant L (as shown in FIG. 5 two-point connection), the The ligament implant L can be an artificial ligament, an allogeneic ligament or an autogenous ligament, which is not limited in the present invention, the ligament implant L is penetrated from the second end lb of the hollow tube 1 and bypasses the limiter 2, so that the ligament implant L can hang and abut on the arc portion 21 of the limiter 2, the two ends of the ligament implant L expose the second end lb of the hollow tube 1, so that Ligament The implant L forms a symmetrically bent shape.

[0056] Please refer to FIG. 5 and FIG. 6, according to this, when the doctor wants to perform anterior cruciate ligament reconstruction surgery for the patient, first use a drill (not shown) to drill a femur X The femoral tunnel XI, and a tibial tunnel Y1 drilled in a tibia Y, the femoral tunnel XI and the tibial tunnel Y1 can be in communication with each other; then, the shrinkage portion 15 of the hollow tube 1 passes through the femoral tunnel XI So that the cruciate ligament hanging interlocking fixation device can be implanted into the strand tunnel _X1 as a whole, and the multiple turning portions 14c of the check structure 14 can abut on the inner wall of the strand tunnel XI to avoid the cruciate ligament The suspension interlocking fastener slides relative to the inner wall of the strand tunnel XI, so that the cruciate ligament suspension interlocking fastener can be firmly located in the strand tunnel XI.

[0057] At this time, both ends of the ligament implant L hang into the tibial tunnel Y1, and finally use an interface nail F to penetrate the tibial tunnel Y1 from one side of the tibia Y, so that the ligament can be Both ends of the implant L are squeezed and positioned in the tibial tunnel Y1, thereby preventing the ligament implant L from being suspended for a long distance, to ensure that the fixing force for rebuilding the ligament implant L can be increased, and To avoid unstable swaying of the ligament implant L and expansion of the tunnel XI, it has the effect of improving postoperative quality and reducing related risks.

[0058] Since the ligament implant L hangs against the arc portion 21 of the limiter 2, the ligament implant L can be prevented from being damaged due to scratches. In addition, since the hollow tube body 1 has at least one growth-inducing hole 11, thereby, the femur X can grow toward the inside of the hollow tube body 1 through the at least one growth-inducing hole 11, so that the ligament implant L and The femur X can be combined comprehensively in a larger area to improve the healing stability after the operation and allow the patient to recover as soon as possible after the operation. In particular, the cruciate ligament suspension interlocking fixator of the present invention can be made of metal material or human body absorbable material, and the present invention is not limited.

[0059] In summary, the cruciate ligament suspension interlocking fixator of the present invention is entirely implanted in the strand tunnel, the backstop structure abuts on the inner wall of the strand tunnel, and the ligament implant can be hung against Connected to the limiter, so that the ligament implant can be firmly positioned in the strand tunnel, thereby ensuring that the ligament implant will not cause unstable shaking and the situation of the tunnel expansion, and has a postoperative lift Quality and effectiveness of reducing related risks

Claims

[Claim 1] An interlocking fixator for cruciate ligament suspension, characterized in that it includes:

A hollow tube body has at least one growth-inducing hole and a check structure, the at least one growth-inducing hole penetrates an inner wall surface and an outer wall surface of the hollow tube body, the check structure is located on the hollow tube body Outer wall surface; and

A limiting member is located in the hollow tube body, and two ends of the limiting member are connected to the inner wall surface.

[Claim 2] The cruciate ligament suspension interlocking fixator of claim 1, wherein the hollow tube body has a first end and a second end opposite to each other, the first end has a Diameter shrinkage.

[Claim 3] The cruciate ligament suspension interlocking fixator according to claim 2, wherein the limiting member has a circular arc portion, and the circular arc portion faces the first end of the hollow tube body .

[Claim 4] The cruciate ligament suspension interlocking fixator according to claim 2, wherein an axis direction is defined between the first end and the second end, and the at least one growth-inducing hole is A long hole is formed along the axis.

[Claim 5] The cruciate ligament suspension interlocking fixator of claim 1, wherein the check structure has a plurality of long slopes and a plurality of short slopes, the plurality of short slopes and the plurality of The long inclined surfaces are respectively connected to form a turning portion, and each turning portion abuts on the inner wall of a strand tunnel.

[Claim 6] The cruciate ligament suspension interlocking anchor according to claim 1, wherein the check structure is formed in an oblique sawtooth shape.

[Claim 7] The cruciate ligament suspension interlocking fixator according to any one of claims 1 to 6, characterized in that the length of the hollow tube body is 25 to 30 mm

[Claim 8] The cruciate ligament suspension interlocking fixator as claimed in claim 7, characterized in that the limiting member is integrally formed with the hollow tube body.