Soft joint blocking device

Abstract

The present invention provides a soft joint blocking device, which is composed of a fork head, a hook head, a tail ring, a limiting ring, an auxiliary nail and a guide. The inner side of the arm of the fork head is provided with inverted teeth, which converge inward at 10°-25°; there is a conical protrusion in the middle of the crossbeam, and there is a conical through hole on each side of the crossbeam, one end of which is connected to a hemispherical tail end, and there is an annular groove on the inner surface below the hemispherical tail end. One end of the hook head is an arc hook; one end of the tail ring is spherical, and the other end is a rectangular or elliptical ring structure. The above structure is matched with autologous, allogeneic, artificial tendons or ligaments for use, and the angle that needs to be blocked and fixed can be freely adjusted, which is convenient for adjusting the tension of the joint to strengthen the blocking, so as to form a fixing device that can effectively restrain the unidirectional dislocation of the joint.

Description

Technical Field

[0001] The invention belongs to the technical field of soft tissue reinforcement for preventing unidirectional dislocation of joints, in particular to a soft joint blocking fixation reconstruction device. Background Art

[0002] Joint dislocation is still a thorny problem in clinical practice and is difficult to handle. For example, during total hip replacement, there is a tendency for the prosthesis to dislocate during surgery due to poor prosthesis position and poor soft tissue condition, or postoperative dislocation of the artificial joint. Another example is the impact or dislocation of the shoulder prosthesis above due to chronic dysfunction of the coracoacromial arch after shoulder replacement, or recurrent anterior or posterior dislocation of the shoulder joint. All of these require strengthening of the soft tissue in the direction of joint dislocation. However, the current clinical methods are limited to overlapping sutures of soft tissues, which may lead to reduced joint mobility and pain if they are too tight, and they cannot effectively limit the tendency of joint dislocation if they are too loose. At present, there is still a lack of a device to fix, reconstruct and strengthen the soft tissue in front of the dislocated joint. Summary of the invention

[0003] The purpose of the present invention is to provide a soft joint blocking device that can be fixed on two adjacent bones in different ways and used with autologous, allogeneic, or artificial tendons or ligaments to form a fixing device that constrains unidirectional dislocation of the joint, thereby facilitating elimination of the tendency of joint dislocation.

[0004] In order to solve such problems, the present invention designs a soft joint blocking device, which can be effectively fixed on bones in different situations. After connecting tendons and ligaments, it can effectively prevent unidirectional dislocation of the joint, and the tension and strength of the enhanced blocking can be conveniently adjusted.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions to achieve the above problems:

[0006] A soft joint blocking device, except for the limiting ring, is made of metal or alloy, and is divided into a fork head, a hook head, a tail ring, a limiting ring, an auxiliary nail and a guide. The fork head has two arms at one end, and the inner side of the arm has inverted teeth, which are in the shape of a fork that converges inward at 10°-25°, and the two arms are connected by a crossbeam; there is a conical protrusion in the middle of the crossbeam, and there is a conical through hole on each side of the crossbeam, with an internal thread, and the diameter of the rear part of the conical through hole is larger than the front part; the other end of the fork head is connected to a hemispherical tail end, and there is an annular groove on the inner surface below the hemispherical tail end. One end of the hook head is an arc-shaped hook with a question mark shape, and the other end of the hook head is connected to a hemispherical tail end that is the same as the fork head, and there is an annular groove on the inner surface below the hemispherical tail end. One end of the tail ring is a spherical enlarged head, with a narrowed cylindrical neck in the middle, and the other end is a rectangular or elliptical ring structure. The limit ring is made of elastic material such as plastic or polymer material, with an opening ring, and there is a small hole near the two ends of the opening. The limit ring can be embedded with the annular groove on the inner surface below the hemispherical tail end of the fork head and the hook head. The auxiliary nail is conical, and the diameter gradually decreases from the tail end to the tip. It has external threads throughout the body and a hexagonal recess or a cross groove at the tail end. There are two hollow sleeves at the head end of the guide that converge inward at 10°-25°. The two sleeves are connected to the handle through a crossbeam, and the handle and the sleeve side are at an angle of 150°.

[0007] The above structure can be matched with autologous, allogeneic, or artificial tendons or ligaments to form a fixation device that restricts unidirectional dislocation of the joint.

[0008] As described above, the soft joint blocking device, the inner side of the arm of the fork head is provided with inverted teeth, presenting a fork shape converging inwardly at 10°-25°.

[0009] As described above, the soft joint blocking device has a cone-shaped protrusion in the middle of the crossbeam of the fork-type head.

[0010] As described above, in the soft joint blocking device, the conical through hole of the cross beam has an internal thread, and the diameter of the rear part of the conical through hole is larger than that of the front part.

[0011] In the soft joint blocking device as described above, one end of the fork head is connected to a hemispherical tail end.

[0012] As described above, in the soft joint blocking device, one end of the hook head is an arc-shaped hook in a question mark shape.

[0013] As described above, in the soft joint blocking device, one end of the hook-type head is connected to a hemispherical tail end.

[0014] As described above, the soft joint blocking device has one end of the tail ring as a spherical enlarged head and the other end as a rectangular or elliptical ring structure.

[0015] In the soft joint blocking device as described above, the diameter of the auxiliary nail gradually decreases from the tail end to the tip end, the whole body is provided with external threads, and the tail end is provided with a hexagonal recess or a cross groove.

[0016] As described above, the soft joint blocking device has two hollow sleeves at the head end of the guide which converge inwards at an angle of 10°-25°. The two sleeves are connected to the handle via a crossbeam, and the handle forms an angle of 150° with the side of the sleeve.

[0017] Compared with the prior art, the advantages and positive effects of the present invention are: the soft joint blocking device of the present invention has a novel and reasonable design, is easy to use, and can effectively prevent unidirectional displacement or dislocation of the joint. Different matching of the fork head, hook head and tail ring can be used to adapt to different application scenarios. For example, when blocking and fixing between two narrow bones is required, such as reconstruction of the coracoacromial arch, two hook heads can be connected to two tail rings respectively, and two narrowed bones can be hooked respectively, so that the tendon or ligament structure can be connected and fixed between the tail rings for blocking. For wider bones, such as the proximal humerus or proximal femur, the fork head and tail ring can be used for reconstruction and fixation. The inverted teeth on the inner side of the fork head arm can effectively enhance the fixation strength, improve the pull-out resistance, and prevent withdrawal from the bone; the conical auxiliary nail can match the internal thread of the fork head cross beam through hole, further enhancing the overall stability, and the conical protrusion of the cross beam can also provide additional fixation. The hemispherical tail ends of the fork head and hook head and the spherical head of the tail ring can form a universal ball joint, which can freely adjust the angle that needs to be blocked and fixed, improving the overall flexibility; the limit ring can effectively prevent the universal ball joint from coming out. Passing the ligaments and tendons through the annular structure at one end of the two tail rings is convenient for adjusting the tightness of the suture block to prevent complications of being too tight or too loose.

[0018] Other features and advantages of the present invention will become more apparent after reading the detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the three-dimensional structure of a specific embodiment of the fork head of the present invention;

[0020] Figure 2 is a schematic diagram of a half-section structure of a specific embodiment of the fork-type head of the present invention;

[0021] Figure 3 is a schematic diagram of the three-dimensional structure of a specific embodiment of the hook-type head of the present invention;

[0022] Figure 4 is a schematic diagram of a half-section structure of a specific embodiment of the hook-type head of the present invention;

[0023] Figure 5 is a schematic diagram of the three-dimensional structure of a specific embodiment of the tail ring of the present invention;

[0024] Figure 6 is a schematic diagram of the three-dimensional structure of a specific embodiment of the limit ring of the present invention;

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of a specific embodiment of the auxiliary nail of the present invention;

[0026] Figure 8-10 It is a schematic diagram of the three-dimensional structure of a specific embodiment of the guide device of the present invention. DETAILED DESCRIPTION

[0027] Unidirectional dislocation of joints is still a difficult problem that plagues many clinical patients. Existing methods are limited to overlapping sutures to reinforce soft tissues, which have limited effects. Too tightness leads to the risk of long-term degeneration and pain, while too looseness still causes the possibility of dislocation. At present, there is a lack of fixing devices that strengthen and block the soft tissues around joints. In order to solve such problems, the present invention designs a soft joint blocking device, which can be flexibly selected and used according to bone conditions, and the size of the strengthened tension can be adjusted to effectively prevent the tendency of joint dislocation.

[0028] The implementation of the present invention is described in detail below with reference to the accompanying drawings by way of specific embodiments:

[0029] like Figure 1-10 As shown, this embodiment proposes a soft joint blocking device, which is divided into a fork head 10, a hook head 20, a tail ring 30, a limiting ring 40, an auxiliary nail 50 and a guide 60;

[0030] like Figure 1 , 2 As shown, one end of the fork head 10 has two arms 11 with inverted teeth on the inner side, which converge inward at 10°-25°, and the two arms 11 are connected by a cross beam 12; a conical protrusion 13 is provided in the middle of the cross beam 12, and a conical through hole 14 with an internal thread is provided on each side of the cross beam 12; the other end of the fork head 10 is connected to a hemispherical tail end 15, and an annular groove 16 is provided on the inner surface below the hemispherical tail end 15.

[0031] like Figure 3 , 4 As shown, one end of the hook head 20 is an arc-shaped hook 21 in a question mark shape, and the other end of the hook head is connected to a hemispherical tail end 22 that is the same as the fork head, and an annular groove 23 is formed on the inner surface below the hemispherical tail end 22.

[0032] like Figure 5 As shown, one end of the tail ring 30 is a spherical enlarged head 31, the middle is a narrowed cylindrical neck 32, and the other end is an elliptical ring structure 33.

[0033] like Figure 6As shown, the limiting ring 40 is made of elastic material, such as plastic or polymer material, and is in the shape of an opening, and each of the two ends near the opening has a small hole 41. Of course, the limiting ring can also adopt a structure similar to a spring buckle.

[0034] like Figure 7 As shown, the auxiliary nail 50 is conical, with a diameter gradually decreasing from the tail end to the tip end, with external threads throughout the body, and a hexagonal recess or a cross groove at the tail end.

[0035] like Figure 8-10 As shown, the guide 60 has two hollow sleeves 61 at the head end thereof which converge at an angle of 10°-25°. The two sleeves are connected to a handle 63 via a crossbeam 62. The handle 63 forms an angle of 150° with the side of the sleeve 61.

[0036] This embodiment uses an implantation device to implant a soft joint blocking device into two adjacent bones. After connecting autologous, allogeneic or artificial ligaments and tendons, it can effectively limit the single-direction movement of the joint, thereby preventing joint dislocation.

[0037] When using, first determine the condition of the bone that needs to be fixed. For example, if blocking fixation is required between two narrow bones, such as reconstruction of the coracoacromial arch, two hook heads 20 can be connected to two tail rings 30 respectively; for wider bones, such as the proximal humerus or proximal femur, a fork head 10 and a tail ring 30 can be used for reconstruction and fixation.

[0038] When fixing with the fork head 10, first use the guide 60 to drill holes in the bone to be fixed along the two guide sleeves 61 with a drill or a metal needle, then knock the arm 11 of the fork head 10 into the hole until the crossbeam 12 fits the bone, and choose whether to use the auxiliary nail 50 according to the fixing strength. If it is necessary to use it, screw the auxiliary nail 50 into the conical through hole 14 in the crossbeam 12 until the auxiliary nail 50 is completely immersed and matches the internal thread of the conical through hole 14. Put the ball head 31 of the tail ring 30 into the hemispherical tail end 15 of the fork head, insert the tip of the small pliers into the hole 41 close to the opening of the limit ring 40, clamp the limit ring 40 to form a closed ring, put it into the annular groove 16 on the inner surface below the hemispherical tail end 15 of the fork head, and release the pliers.

[0039] When the hook head 20 is used, a hole is drilled on the narrowed bone with a drill bit, and the arc-shaped hook 21 at one end of the hook head 20 is inserted into the hole for fixation, and the tail end is connected to the fork head 10. After the fixation is completed, one or more autologous or allogeneic tendons, or sheet-shaped or bundle-shaped polyester fiber artificial ligament structures are respectively passed through the annular structures 33 at one end of the two tail rings 30, folded back and adjusted to a suitable tightness, and fixed by suturing the ends or the ends with sutures, and the fixation process can be completed.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A soft joint blocking device, characterized in that: It includes a fork head, a hook head, a tail ring, a limiting ring, an auxiliary nail and a guide. The fork head, hook head, tail ring, limiting ring, auxiliary nail and guide are matched with autologous, allogeneic, artificial tendons or ligaments to form a fixing device for restraining unidirectional dislocation of joints. The fork-shaped head has two arms at one end, the inner side of the arms has inverted teeth, and is in the shape of a fork that converges inwards at 10°-25°, and the two arms are connected by a crossbeam; The cross beam has a conical protrusion in the middle, and each side of the cross beam has a conical through hole with an internal thread, and the diameter of the rear part of the conical through hole is larger than that of the front part; The other end of the fork-shaped head is connected to a hemispherical tail end, and an annular groove is provided on the inner surface below the hemispherical tail end; One end of the hook-type head is an arc-shaped hook in the shape of a question mark, and the other end of the hook-type head is connected to a hemispherical tail end which is the same as the fork-type head, and an annular groove is provided on the inner surface below the hemispherical tail end; The tail ring has a spherical enlarged head at one end, a narrowed cylindrical neck in the middle, and a rectangular or elliptical ring structure at the other end; The limiting ring is made of elastic material and is in the shape of an opening. There is a small hole at each end near the opening. The limiting ring can be fitted into the annular groove on the inner surface below the hemispherical tail end of the fork head and the hook head. The auxiliary nail is conical, with a diameter gradually decreasing from the tail end to the tip end, with an external thread throughout the body and a hexagonal recess or a cross groove at the tail end; The guide head end is provided with two hollow sleeves which converge inwards at an angle of 10°-25°. The two sleeves are connected to the handle through a crossbeam, and the handle and the sleeve sides form an angle of 150°.

2. The soft joint blocking device according to claim 1, characterized in that: The soft joint blocking device is made of alloy except the limiting ring.

Images