Repair fixation screws and ligament repair fixation components

Abstract

The present invention provides a repair fixing screw and a ligament repair fixing assembly, which relate to the technical field of medical devices. The repair fixing screw comprises a first nail body and a second nail body, wherein the first nail body and the second nail body are coaxially arranged, and an abutment structure is arranged between the tail end of the first nail body and the head end of the first nail body; the abutment structure is used to enable the second nail body to rotate relative to the first nail body, and to limit the position of the second nail body in its own radial direction. The present invention solves the technical problem that traditional repair fixing screws easily cause the screw and the medullary canal to loosen, resulting in poor fixing effect.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a repair and fixation screw and a ligament repair and fixation assembly. Background Art

[0002] Traditional screws used for ligament repair and fixation have a single thread structure and are used in conjunction with a ligament fixation sheath. Because the head end of the screw enters the medullary canal and the tail end is fixed on the cortical bone, the structure of traditional repair and fixation screws can easily cause the screw and the medullary canal to loosen in the later stage, resulting in poor fixation effect. Summary of the invention

[0003] The purpose of the present invention is to provide a repair fixing screw and a ligament repair fixing assembly, which are not prone to loosening and have good fixing effect.

[0004] The embodiment of the present invention is achieved as follows:

[0005] A repair fixing screw comprises a first nail body and a second nail body;

[0006] The first nail body and the second nail body are coaxially arranged, and an abutment structure is arranged between the tail end of the first nail body and the head end of the second nail body;

[0007] The abutment structure is used to enable the second nail body to rotate relative to the first nail body and to limit the position of the second nail body in its own radial direction.

[0008] In a preferred embodiment of the present invention, the above-mentioned repair fixing screw, the outer surface of the first nail body is sequentially provided with a plurality of annular fixing teeth along the direction from the head end to the tail end;

[0009] The diameter of the fixing teeth gradually increases from the head end of the first nail body to the tail end of the first nail body.

[0010] Each fixing tooth includes an inclined surface and a straight surface, wherein the inclined surface forms an acute angle with the axis of the first nail body, and the straight surface forms a right angle with the axis of the first nail body. Multiple fixing teeth are connected end to end, and a rounded corner is set at the connection position of two adjacent fixing teeth. Since each fixing tooth is in the shape of a truncated cone with a narrow front and a wide rear, multiple fixing teeth form a barbed structure, which makes it easy for the head end of the first nail body to enter the medullary canal by knocking, and can also effectively prevent the first nail body from falling out in the reverse direction, and the fixation is more secure.

[0011] In a preferred embodiment of the present invention, in the above-mentioned repair fixing screw, the outer side of the second nail body is provided with an external thread.

[0012] The second nail body is fixed in the cortical bone, and an external thread is arranged on the outer side of the second nail body, so that the fixation of the second nail body is more firm.

[0013] In a preferred embodiment of the present invention, in the above-mentioned repair fixing screw, the outer diameter of the external thread is greater than the outer diameter of the fixing tooth.

[0014] The outer diameter of the external thread is greater than the outer diameter of the fixing tooth, so that the external thread on the second nail body fits more closely with the cortical bone.

[0015] In a preferred embodiment of the present invention, the above-mentioned repair fixing screw has a bone fusion hole arranged on the outer surface of the external thread.

[0016] The provision of the bone fusion hole can increase the contact area between the bone and the repair fixation screw, thus facilitating bone fusion.

[0017] In a preferred embodiment of the present invention, the above-mentioned repair fixing screw, the abutment structure includes a slide groove and a protrusion;

[0018] The slide groove is arranged on the end surface of the tail end of the first nail body; the protrusion is arranged on the end surface of the head end of the second nail body; the slide groove cooperates with the protrusion.

[0019] The sliding groove and the protrusion are respectively arranged on two end surfaces where the first nail body and the second nail body are connected, so as to prevent the second nail body from moving relative to the first nail body in a direction perpendicular to the axial direction.

[0020] In a preferred embodiment of the present invention, in the above-mentioned repair fixing screw, the sliding groove is an annular groove; and the protrusion is an annular protrusion.

[0021] Since the annular groove cooperates with the annular protrusion, the rotation axis thereof is coaxial with the rotation axis of the first nail body and the second nail body, so the second nail body cannot transmit torque to the first nail body, and the first nail body is not prone to loosening.

[0022] In a preferred embodiment of the present invention, the above-mentioned repair fixing screw, the head end of the first nail body is provided with a threading column;

[0023] The threading column is provided with sutures.

[0024] Sutures are attached to the threading column, and the fixation of the sutures can enable the repairing screw to have a ligament repairing effect.

[0025] In a preferred embodiment of the present invention, the above-mentioned repair fixing screw, the first nail body and the second nail body are both provided with a nail implant operation hole.

[0026] The nail implanter operating hole of the first nail body is coaxial with the first nail body, and extends from the head end to the tail end of the first nail body. The nail implanter operating hole reduces the weight of the first nail body; the nail implanter implants the first nail body into the medullary canal by hammering. The nail implanter operating hole of the second nail body extends from the head end to the tail end of the second nail body, and its cross section perpendicular to the length direction is a quadrilateral or hexagon; the nail implanter is an operating rod that can be inserted into the nail implanter operating hole, similar to a wrench, and the nail implanter screws the second nail body into the cortical bone by rotating.

[0027] A ligament repair and fixation assembly comprises a nail implanter and the repair and fixation screw.

[0028] The beneficial effects of the embodiments of the present invention are as follows: the repair fixing screw provided by the present invention comprises a first nail body and a second nail body, the first nail body and the second nail body are coaxially arranged, and an abutment structure is arranged between the tail end of the first nail body and the head end of the first nail body; the abutment structure is used to enable the second nail body to rotate relative to the first nail body, and to limit the position of the second nail body in its own radial direction. The first nail body of the repair fixing screw provided by the present invention can be implanted into the medullary canal, and the second nail body can be implanted into the cortical bone, and the tail end of the first nail body abuts against the second nail body through the abutment structure. When the second nail body becomes loose, such as rotating or slightly moving perpendicular to the axial direction, the first nail body will not follow the rotation, and will not move radially relative to the first nail body, that is, the loosening of the second nail body will not affect the first nail body, and the fixing effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A structural schematic diagram of a first structure of a repair fixing screw provided by an embodiment of the present invention from a first viewing angle;

[0031] Figure 2 A structural schematic diagram of a first structure of a repair fixing screw provided by an embodiment of the present invention from a second viewing angle;

[0032] Figure 3 A structural schematic diagram of a first structure of a repair fixing screw provided by an embodiment of the present invention from a third viewing angle;

[0033] Figure 4 A schematic structural diagram of a second structure of a repair fixing screw provided in an embodiment of the present invention.

[0034] In the figure:

[0035] 100 - first nail body; 101 - head end of the first nail body; 102 - tail end of the first nail body; 103 - fixing tooth; 200 - second nail body; 201 - head end of the second nail body; 202 - tail end of the second nail body; 203 - external thread; 204 - bone fusion hole; 300 - abutment structure; 301 - slide groove; 302 - protrusion; 400 - nail implant operation hole. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0040] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0041] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0043] First embodiment

[0044] Please refer to Figures 1 to 3 , this embodiment provides a repair fixing screw, which includes a first nail body 100 and a second nail body 200;

[0045] The first nail body 100 and the second nail body 200 are coaxially arranged, and an abutment structure 300 is arranged between the tail end 102 of the first nail body and the head end 201 of the second nail body;

[0046] The abutment structure 300 is used to enable the second nail body 200 to rotate relative to the first nail body 100 and to limit the position of the second nail body 200 in its own radial direction.

[0047] The first nail body 100 of the repair fixing screw provided by the present invention can be implanted into the medullary canal, and the second nail body 200 can be implanted into the cortical bone, and the tail end 102 of the first nail body abuts against the second nail body 200 through the abutment structure 300. When the second nail body 200 is loosened, such as rotating or slightly moving perpendicular to the axial direction, the first nail body 100 will not rotate with it, and will not move perpendicular to the axial direction relative to the first nail body 100, that is, the loosening of the second nail body 200 will not affect the first nail body 100, and the fixing effect is good.

[0048] In the above technical solution, further, the outer side of the first nail body 100 is sequentially provided with a plurality of fixing teeth 103 along the direction from the head end to the tail end thereof;

[0049] The fixing teeth 103 are inclined relative to the axis of the first nail body 100 in a direction away from the head end 101 of the first nail body.

[0050] Please refer to Figure 1 and Figure 2Each fixing tooth 103 includes an inclined surface and a straight surface, wherein the inclined surface forms an acute angle with the axis of the first nail body 100, and the straight surface forms a right angle with the axis of the first nail body 100. Multiple fixing teeth 103 are connected end to end, and a rounded corner is set at the connection position of two adjacent fixing teeth 103. Since each fixing tooth 103 is in the shape of a truncated cone with a narrow front and a wide rear, and multiple fixing teeth 103 form a barbed structure, it is convenient for the head end 101 of the first nail body to enter the medullary canal by knocking, and at the same time, it can effectively prevent the first nail body 100 from falling out in the reverse direction, and the fixation is more firm.

[0051] In the above technical solution, further, an outer side of the second nail body 200 is provided with an external thread 203 .

[0052] In this embodiment, the second nail body 200 is fixed in the cortical bone. In this embodiment, an external thread 203 is provided on the outer side of the second nail body 200 to make the second nail body 200 more firmly fixed.

[0053] In the above technical solution, further, the outer diameter of the external thread 203 is greater than the outer diameter of the fixed tooth 103 .

[0054] Before installing the repair fixing screw of this embodiment, it is necessary to first open a hole in the cortical bone. The first nail body 100 enters the medullary canal through the hole by hammering. The diameter of the hole may increase due to the entry of the fixing tooth 103 on the first nail. Therefore, the outer diameter of the external thread 203 on the second nail body 200 of this embodiment is larger than the outer diameter of the fixing tooth 103, and the fit between the external thread 203 on the second nail body 200 and the cortical bone is tighter.

[0055] Please refer to Figure 4 A bone fusion hole 204 is provided on the outer surface of the external thread 203 .

[0056] The provision of the bone fusion hole 204 can increase the contact area between the bone and the repair fixation screw, thus facilitating bone fusion.

[0057] In the above technical solution, further, the abutment structure 300 includes a slide groove 301 and a protrusion 302;

[0058] The slide groove 301 is arranged on the end surface of the tail end 102 of the first nail body; the protrusion 302 is arranged on the end surface of the head end 201 of the second nail body; the slide groove 301 cooperates with the protrusion 302.

[0059] The abutment structure 300 causes the first nail body 100 to abut against the second nail body 200. After the first nail body 100 and the second nail body 200 abut against each other, the second nail body 200 does not move relative to the first nail body 100 in a direction perpendicular to the axial direction. Therefore, this embodiment is achieved by the cooperation of the slide groove 301 on the end face of the first nail body 100 and the protrusion 302 on the end face of the second nail body 200.

[0060] In the above technical solution, further, the slide groove 301 is an annular groove; and the protrusion 302 is an annular protrusion 302 .

[0061] The abutment structure 300 can also prevent the rotation of the second nail body 200 from being transmitted to the first nail body 100, that is, the second nail body 200 does not transmit torque, so in this embodiment, the slide groove 301 is preferably set as an annular groove, and the protrusion 302 is set as an annular protrusion 302. Since the annular groove and the annular protrusion 302 cooperate, their rotation axis is coaxial with the rotation axis of the first nail body 100 and the second nail body 200, so the second nail body 200 cannot transmit torque to the first nail body 100, and the first nail body 100 is not easy to loosen.

[0062] In the above technical solution, further, the head end 101 of the first nail body is provided with a threading post;

[0063] The threading column is provided with sutures.

[0064] The threading column is provided with sutures, and the repair fixing screw of this embodiment has a ligament repairing function through the fixation of the sutures.

[0065] In the above technical solution, further, both the first nail body 100 and the second nail body 200 are provided with a nail implanter operating hole 400 .

[0066] The implantation process of the first nail body 100 and the second nail body 200 needs to be completed with the assistance of a nail implanter, so in this embodiment, a nail implanter operating hole 400 is provided on both the first nail body 100 and the second nail body 200. The nail implanter operating hole 400 of the first nail body 100 is coaxial with the first nail body 100, and it runs from the head end 101 of the first nail body to the tail end 102 of the first nail body. The nail implanter operating hole 400 reduces the weight of the first nail body 100; the nail implanter implants the first nail body 100 into the medullary canal by knocking. The nail implanter operating hole 400 of the second nail body 200 runs from the head end 201 of the second nail body to the tail end 202 of the second nail body, and its cross-section perpendicular to the length direction is a quadrilateral or hexagon; the nail implanter is an operating rod that can be inserted into the nail implanter operating hole 400, similar to a wrench, and the nail implanter screws the second nail body 200 into the cortical bone by rotating.

[0067] Second embodiment

[0068] The present embodiment provides a repair and fixing assembly, which includes the repair and fixing screw of the first embodiment, so the technical solutions already described in the first embodiment are not repeated in the present embodiment.

[0069] This embodiment provides a repair and fixation assembly, which includes a nail implanter and the repair and fixation screw described in the first embodiment.

[0070] In this embodiment, there may be one or two nail implanters used to assist in the installation of the first nail body 100 and the second nail body 200. When there is one nail implanter used to assist in the installation of the first nail body 100 and the second nail body 200, the nail implanter is an operating rod that can be inserted into the nail implanter operating hole 400 of the second nail body 200, and one end of the operating rod is provided with a nail hammer that can strike the first nail body 100; when there are two nail implanters used to assist in the installation of the first nail body 100 and the second nail body 200, one of the nail implanters may be a nail implanter hammer used for implanting the first nail body 100, and the other nail implanter is an operating rod that can cooperate with the nail implanter operating hole 400 of the second nail body 200, and is used for implanting the second nail body 200.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A repair fixing screw, characterized in that: comprising a first nail body and a second nail body; The first nail body and the second nail body are coaxially arranged, and an abutment structure is arranged between the tail end of the first nail body and the head end of the second nail body; The abutment structure is used to enable the second nail body to rotate relative to the first nail body and to limit the position of the second nail body in its own radial direction; The abutment structure includes an annular sliding groove and an annular protrusion; The slide groove is arranged on the end surface of the tail end of the first nail body; the protrusion is arranged on the end surface of the head end of the second nail body; the slide groove cooperates with the protrusion; The outer surface of the first nail body is provided with a plurality of annular fixing teeth in sequence from the head end to the tail end thereof; the diameter of the fixing teeth gradually increases from the head end to the tail end of the first nail body; The head end of the first nail body is provided with a threading post; the threading post is provided with a suture; The outer side of the second nail body is provided with an external thread; the outer diameter of the external thread is greater than the outer diameter of the fixing tooth; The first nail body and the second nail body are both provided with a nail implanter operation hole; The nail implanter operation hole of the first nail body is coaxial with the first nail body and penetrates from the head end to the tail end of the first nail body, and the nail implanter implants the first nail body into the medullary canal by hammering; the nail implanter operation hole of the second nail body penetrates from the head end to the tail end of the second nail body; The nail implanter screws the second nail body into the cortical bone by rotating.

2. The repair fixing screw according to claim 1, characterized in that: A bone fusion hole is arranged on the outer surface of the external thread.

3. A ligament repair fixation assembly, characterized in that: The invention comprises a nail implanter and a repair fixing screw as claimed in claim 1 or 2.

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