A multi-purpose osteoporosis anchor system

Abstract

The utility model discloses a multi-purpose osteoporosis anchor system, including a nail pile, a suture guide and a suture extrusion nut, wherein a hollow cavity is provided in the nail pile; the suture guide is provided with an opening for the suture to pass through, the nail pile is divided into a head and a tail along its axial direction, the suture guide is placed in the hollow cavity and cooperates with the anti-rotation hole of the head, the surfaces of the head and the tail are respectively provided with a first thread and a second thread, the pitch of the second thread is smaller than the pitch of the first thread; an opening is provided on the side of the tail, and the inner cavity wall of the tail is provided with an internal thread, which can be matched and connected with the suture extrusion nut. The multi-purpose osteoporosis anchor system of the utility model can provide reliable internal fixation consumables for patients with rotator cuff injuries accompanied by severe osteoporosis, and can effectively solve the problems of loosening and high pull-out failure after rotator cuff repair surgery.

Description

Technical Field

[0001] The utility model relates to a multi-purpose osteoporosis anchor system. Background Art

[0002] Rotator cuff injury is a common disease in sports medicine. With the development of orthopedic sports medicine, the number of rotator cuff repair surgeries has increased year by year. The postoperative failure rate of various types of rotator cuff injury repair surgeries is 15-95%. Most rotator cuff injuries are degenerative, and older patients are often accompanied by varying degrees of osteoporosis. The loosening and pullout of the fixed anchor caused by osteoporosis are directly related to the failure rate of rotator cuff repair. The present invention is a universal anchor that is suitable for various soft tissue and bone fixation needs, and is particularly suitable for fixation and repair of patients with severe osteoporosis. Summary of the invention

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a multi-purpose osteoporosis anchor system, which consists of a nail pile, a suture guide, and a suture extrusion nut. The nail pile adopts a hollow design and has a reserved bone cement overflow hole. It can also be equipped with a push rod for bone cement injection; the expandable design of the thread at the tail of the nail pile can effectively increase the pull-out resistance; and the front end design of the suture guide can not only guide the wire, but also cooperate with the nail pile to form an anti-rotation structure. The suture is squeezed and fixed between the suture extrusion nut and the nail pile through the suture extrusion nut, thereby realizing the function of adjusting the suture tension after the suture is adjusted.

[0004] The utility model is realized through the following technical scheme: a multi-purpose osteoporosis anchor system, comprising a nail pile, a suture guide and a suture extrusion nut, wherein a hollow cavity is provided in the nail pile; an opening is provided in the suture guide for the suture to pass through, and the nail pile is divided into a head and a tail along its axial direction, and the suture guide is placed in the hollow cavity and cooperates with the anti-rotation hole in the head, and the surfaces of the head and the tail are respectively provided with a first thread and a second thread, and the pitch of the second thread is smaller than the pitch of the first thread; an opening is provided on the side of the tail, and an inner cavity wall of the tail is provided with an internal thread, and the internal thread can be matched and connected with the suture extrusion nut.

[0005] In a preferred embodiment, the suture guide can be divided into an upper section, a middle section and a lower section from the head to the tail section, the structure of the upper section can be matched and connected with the anti-rotation hole in the head; the middle section is provided with the opening; and the lower section can be matched and connected with the implanter.

[0006] In a preferred embodiment, the radial cross-section of the anti-rotation hole is in the shape of a polygonal hole.

[0007] In a preferred embodiment, the cross-sectional structure of the lower section is generally cylindrical, polygonal, cylindrical with holes, or polygonal with holes.

[0008] In a preferred embodiment, the head is further provided with a bone cement overflow hole, and the bone cement overflow hole is communicated with the hollow cavity.

[0009] In a preferred embodiment, the outer diameter of the head portion is smaller than the outer diameter of the tail portion.

[0010] In a preferred embodiment, a transition stage is used to transitionally connect the head and the tail, the thread on the transition stage is connected to the first thread, and the transition stage changes from small to large as a whole from the head to the tail.

[0011] In a preferred embodiment, it further includes a push rod, one end of which has a joint portion, and the joint portion is provided with a thread structure that cooperates with the internal thread.

[0012] In a preferred embodiment, a limiting structure is also provided at the tail end of the threaded structure.

[0013] In a preferred embodiment, the thread of the suture extrusion nut has an inclined angle relative to the nail pile body.

[0014] In a preferred embodiment, the thread of the suture extrusion nut is round and blunt.

[0015] In a preferred embodiment, the opening is a square hole.

[0016] In a preferred embodiment, the inner hole of the suture extrusion nut is a polygonal inner hole.

[0017] The multi-purpose osteoporosis anchor system of the utility model can provide reliable internal fixation consumables for patients with rotator cuff injuries accompanied by severe osteoporosis, and can effectively solve the problems of loosening and high pull-out failure after rotator cuff injury repair surgery, avoiding the hidden dangers of medical disputes. At the same time, the system of the utility model can also be used as an emergency treatment plan for screw loosening and dislocation during conventional surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is an exploded view of the multi-purpose osteoporosis anchor system of the utility model.

[0020] Figure 2 It is a cross-sectional view of the multi-purpose osteoporosis anchor system of the utility model.

[0021] Figure 3 It is a three-dimensional diagram of the utility model nail pile.

[0022] Figure 4 yes Figure 3 Cross-sectional view at AA in the middle.

[0023] Figure 5 It is a structural diagram of the suture guide of the utility model.

[0024] Figure 6 yes Figure 5 Enlarged schematic diagram of point g in the middle.

[0025] Figure 7 It is a top view of the suture guide of the utility model.

[0026] Figure 8 and Fig. 9 It is a structural diagram of a suture extrusion nut of the utility model.

[0027] Fig.10 It is a top view of the suture extrusion nut of the utility model.

[0028] Fig.11 It is a structural diagram of the injection rod of the utility model.

[0029] Fig.12 yes Fig.11 Cross-sectional view at the middle BB.

[0030] Fig.13 It is a top view of the tail end of the threaded structure of the injection rod of the utility model.

[0031] Fig.14 It is a structural schematic diagram of the utility model after the nail pile and the injection rod are connected.

[0032] Fig.15 yes Fig.11 Cross-sectional view at CC.

[0033] Figures 16 to 19 The utility model is a schematic diagram of the humeral rotator cuff suturing operation process. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the invention. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] Referring to the drawings of the specification, a multi-purpose osteoporosis anchor system includes a nail pile 1, a suture guide 2 and a suture extrusion nut 3, wherein the nail pile 1 or the suture guide 2 can be produced in a variety of ways, such as injection molding, machining or 3D printing, wherein a hollow cavity 10 is opened inside the nail pile 1, and the nail pile 1 is divided into a head 11 and a tail 12 along its axial direction, a first thread 110 is arranged on the surface of the head 11, and a plurality of bone cement overflow holes 111 are opened between adjacent first threads, and the bone cement overflow holes 111 are connected to the above-mentioned hollow cavity, so that bone cement can overflow from the gap between the anchor and the bone to enhance the bonding force between the two; in addition, the radial cross-section of the anti-rotation hole of the head 11 is designed as a polygonal hole pattern to cooperate with other components, and the polygonal hole is, for example, a square hole, a triangular hole or a hexagonal hole.

[0036] The surface of the tail portion 12 is provided with a second thread 120, and the pitch and tooth type of the tail portion can be matched according to the diameter and length of the nail pile. The pitch of the second thread 120 is smaller than the pitch of the first thread 110, that is, as shown in the figure, the first thread of the head is designed as a sparse thread, and the first thread is, for example, a single thread, a double thread or a triple thread, and the second thread of the tail portion is a dense thread, and the second thread is, for example, a double thread, a quadruple thread or a hexaplethic thread, so as to increase the pull-out resistance; the tail Openings 12a are provided on both sides of 12. In this way, the pull-out resistance can be effectively increased by the expandable design of the openings on both sides of the tail of the nail pile. The openings 12a can also be set to a multi-opening structure with more than double openings. The openings 12 can be set to extend from the end of the tail 12 away from the head to the position where the tail is connected to the transition platform; in addition, the inner cavity wall of the tail has an internal thread 122, which can cooperate with the internal thread of the suture extrusion nut 3 or the injection device connector, and the pitch and tooth type of the internal thread are selected according to the diameter of the nail sheath.

[0037] Furthermore, the head 11 and the tail 12 are transitionally connected by a transition platform 14, and the thread 141 on the transition platform 14 is connected to the first thread 110 of the head. The outer diameter of the head 11 is smaller than the outer diameter of the tail 12, so the transition platform 14 as a whole presents a state of changing from small to large from the head to the tail.

[0038] The suture guide 2 can be divided into an upper section 21, a middle section 22 and a lower section 23 from the beginning to the end. The structure of the upper section 21 can be matched with the anti-rotation hole of the head of the nail pile, that is, the structure of the upper section 21 can be set to a polygonal structure (such as a square structure, a triangular structure or a hexagonal structure). The middle section 22 is provided with an opening 221, such as the square hole shown in the attached figure, and the opening 221 can pass at least three 2# threads. The structure of the lower section 23 of the suture guide 2 can be matched with the implanter, such as the attached Figure 7 As shown, the cross-sectional structure of the lower section 23 is usually cylindrical or polygonal, or cylindrical with holes or polygonal with holes. The front end design of the suture guide of the present invention can be used for guiding, and can also cooperate with the anti-rotation hole at the head of the nail pile, so that the suture guide has a good anti-rotation effect when it cooperates with the extrusion nut, preventing the nail pile from rotating when the suture extrusion nut is installed. The design of the present invention can squeeze and fix the suture between the extrusion nut and the nail sheath, and can realize the function of adjusting the suture tension later.

[0039] The suture extrusion nut 3 has an external thread 31, which is mainly matched with the internal thread 122 of the nail pile. The inner hole 30 of the suture extrusion nut 3 is a polygonal inner hole, such as a hexagonal inner hole, which can be produced by injection molding, machining or 3D printing. Figure 8 and attached Fig. 9 The thread of the suture extrusion nut 3 is designed to be round and blunt, and the thread of the suture extrusion nut 3 has an inclination angle θ relative to the nail pile body, and the inclination angle θ is, for example, 120°. In this way, the present invention can effectively avoid cutting the suture through the round and blunt design of the suture extrusion nut and the elastic expansion design of the opening at the tail of the nail pile when tightening the line, while enhancing the overall pull-out resistance. When in use, the hollow nail pile is first inserted, and bone cement is injected to form a bone cement fixing area, and then the outer row of anchors for post-adjustment sutures are used for fixation, thereby meeting the post-adjustment requirements of the operation.

[0040] For further information, see Attachment Fig.11 To Attachment Fig.15 The multi-purpose osteoporosis anchor system also includes a push rod 4, one end of which has a joint portion 41, and the joint portion 41 can also be provided with a thread structure 42, which can be matched with the internal thread 122 of the nail pile (refer to the attached Fig.14 and attached Fig.15 ), the tail end of the thread structure 42 is also provided with a limiting structure 43, and the limiting structure 43 is as shown in the attached Fig.13 The ring shown may be a ring, so as to facilitate the limiting connection between the injection rod 4 and the nail pile.

[0041] The operation sequence of the multi-purpose osteoporosis anchor system of the utility model is as follows: first, make a preliminary assessment of the patient's osteoporosis degree; use 2.4 Kirschner wire positioning X-ray fluoroscopy to select a nail pile of appropriate length, such as 30, 40, 50 mm nail piles, to form a suitable bone cement solidification area; open, tap, and screw in the nail pile 1, and the tail of the nail pile is flush with the cortical bone; refer to the attached Fig.16 , install the push rod 4 to the nail pile 1, push the bone cement into the hollow cavity to complete the bone cement strengthening and curing, and then remove the push rod 4 from the nail pile 1; refer to the attached Fig.17 To Attachment Fig.19 , take the outer row of nails and reserve space for 2-3 No. 2 sutures, pass 2-3 sutures through the opening 221 of the suture guide, and insert them into the nail pile 1, so that the structure of the upper section of the suture guide can cooperate with the anti-rotation hole in the nail pile to form an anti-rotation structure, adjust the required tension of the suture, screw in the suture squeezing nut 3, compress the suture, and realize the function of adjusting the suture tension later.

[0042] The above description shows and describes the preferred embodiments of the utility model. As mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A multi-purpose osteoporosis anchor system, characterized in that: It includes a nail pile, a suture guide and a suture extrusion nut, wherein a hollow cavity is provided in the nail pile; the suture guide is provided with an opening for the suture to pass through, and the nail pile is divided into a head and a tail along its axial direction, and the suture guide is placed in the hollow cavity and cooperates with the anti-rotation hole in the head, and the surfaces of the head and the tail are respectively provided with a first thread and a second thread, and the pitch of the second thread is smaller than the pitch of the first thread; an opening is provided on the side of the tail, and the inner cavity wall of the tail is provided with an internal thread, and the internal thread can be matched and connected with the suture extrusion nut.

2. A multi-purpose osteoporosis anchor system according to claim 1, characterized in that: The suture guide can be divided into an upper section, a middle section and a lower section from the head to the tail section. The structure of the upper section can be matched and connected with the anti-rotation hole in the head; the middle section is provided with the opening; and the lower section can be matched and connected with the implanter.

3. The multi-purpose osteoporosis anchor system according to claim 1, characterized in that: The radial cross section of the anti-rotation hole is in a polygonal hole shape.

4. The multi-purpose osteoporosis anchor system according to claim 1, characterized in that: The head is also provided with a bone cement overflow hole, and the bone cement overflow hole is communicated with the hollow cavity.

5. The multi-purpose osteoporosis anchor system according to claim 1, characterized in that: The outer diameter of the head portion is smaller than the outer diameter of the tail portion.

6. A multi-purpose osteoporosis anchor system according to claim 5, characterized in that: The head and the tail are connected by a transition platform, the thread on the transition platform is connected to the first thread, and the transition platform changes from small to large from the head to the tail.

7. The multi-purpose osteoporosis anchor system according to claim 1, characterized in that: It also includes a push rod, one end of which is provided with a joint portion, and the joint portion is provided with a thread structure that matches the internal thread.

8. The multi-purpose osteoporosis anchor system according to claim 7, characterized in that: A limiting structure is also provided at the tail end of the threaded structure.

9. The multi-purpose osteoporosis anchor system according to claim 1, characterized in that: The thread teeth of the suture extrusion nut have an inclined angle relative to the nail pile body.

10. The multi-purpose osteoporosis anchor system according to claim 1, characterized in that: The thread teeth of the suture extrusion nut are round and blunt.

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