Locking type anterior spine plate nail system

Abstract

The utility model discloses a locking type spine anterior plate nail system, which belongs to the technical field of medical instruments and comprises a spine anterior plate and a plurality of locking nails arranged on the spine anterior plate in a threaded manner. The spine anterior plate comprises a bone fracture plate used for being connected with spine bones and screw holes formed in the bone fracture plate and used for installing and locking the lock nails, a plurality of universal holes are vertically formed in the inner walls of the screw holes, and the universal holes divide the inner walls of the screw holes into a plurality of staggered tooth areas. The at least two universal holes are formed in the inner wall of the screw hole in the axial direction of the screw hole, and the diagonal planes are formed on the internal threads to form the staggered teeth, so that when the screw body is about to be installed in place, the universal holes and the staggered teeth are matched for use, the staggered teeth are formed between the staggered teeth and the narrow threads, and the staggered teeth are deformed; the screw body is locked, a locking plate or a locking pin does not need to be used for limiting and fixing the screw body, and operation steps of an operation are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a locking anterior spine plate nail system. Background Art

[0002] The anterior spinal plate is a medical device used to fix the damaged spine during spinal surgery to assist in the treatment of various spinal diseases. After spinal surgery, the anterior spinal plate nail system can maintain the stability between the various segments of the spine after surgery and bear the load on behalf of the spine. When the existing anterior spinal plate nail system is used, after multiple screws are installed in place, the screws are locked in place using the locking plates corresponding to the screws on the anterior spinal plate nail system. The entire operation process is relatively cumbersome.

[0003] The existing patent application number: 202123234135.9 discloses a novel anterior spinal fixation plate, which fixes the locking screws through locking pins, reduces the loosening of the locking screws, and improves the stability of the connection between the locking screws and the spine. In the above-mentioned prior art, the device still has the above-mentioned technical problems during spinal surgery. Utility Model Content

[0004] The purpose of the utility model is to provide a locking anterior spinal plate nail system to solve the problem in the above-mentioned background technology that the locking plate corresponding to the screw on the anterior spinal plate nail system is used to limit and lock the screw, and the whole operation process is relatively cumbersome.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a locking anterior spinal plate nail system, comprising an anterior spinal plate and a plurality of locking nails threadedly arranged on the anterior spinal plate, the anterior spinal plate comprising a bone plate for connecting spinal bones and screw holes arranged on the bone plate for installing and locking the locking nails, a plurality of universal holes are vertically arranged on the inner wall of the screw hole, the plurality of universal holes divide the inner wall of the screw hole into a plurality of staggered tooth areas, an internal thread is fixedly arranged in the staggered tooth area, one end of the internal thread is provided with a beveled surface, the beveled surface and the outer wall of the internal thread together form staggered teeth.

[0007] The locking pin comprises:

[0008] A nail body is sleeved in the screw hole and is used to connect the bone plate and the spinal bone.

[0009] A ball head is arranged at the top end of the nail body, and a narrow thread is arranged on the outside of the ball head, and the narrow thread is meshed with the staggered teeth.

[0010] Furthermore, the staggered tooth areas are relatively distributed in the screw hole, and the internal threads in two adjacent staggered tooth areas correspond end to end in the circumferential direction.

[0011] Furthermore, the screw holes are relatively distributed on the bone plate, and both the screw holes and the universal holes penetrate through two sides of the bone plate.

[0012] Furthermore, the locking nail also includes a wide thread arranged at the bottom end of the outside of the nail body and a medium thread arranged at the top end of the outside of the nail body.

[0013] Furthermore, the pitch of the middle thread is smaller than the pitch of the wide thread, and the pitch of the middle thread is larger than the pitch of the narrow thread.

[0014] Furthermore, the locking nail also includes a groove arranged on the top of the ball head, and the shape of the groove is polygonal.

[0015] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects:

[0016] 1. The utility model provides at least two universal holes on the inner wall of the screw hole along its axial direction, and provides a chamfered surface on the internal thread to form staggered teeth, so that when the nail body is about to be installed in place, the universal holes and the staggered teeth are used in coordination to form staggered teeth between the staggered teeth and the narrow threads, and the staggered teeth are deformed to achieve the locking operation of the nail body, without the need to use a locking plate or a locking pin to limit and fix it, the operation is simple and efficient, and the operation steps of the operation can be reduced;

[0017] 2. The utility model provides a beveled surface at one end of the internal thread to form a staggered tooth. When the screw is about to be installed, a staggered tooth is formed between the staggered tooth and the narrow thread on the ball head. The staggered tooth will also be deformed and lock the nail body, so that the nail body and the bone plate are integrated, thereby improving the locking effect and firmness of the nail body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an axonometric drawing of the utility model;

[0019] Figure 2 It is an axonometric view of the anterior spine plate of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the locking nail in the utility model.

[0021] In the figure: 1. Anterior spinal plate; 11. Bone plate; 12. Screw hole; 13. Universal hole; 14. Internal thread; 15. Beveled surface; 2. Locking nail; 21. Nail body; 22. Wide thread; 23. Medium thread; 24. Ball head; 25. Narrow thread. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0023] like Figures 1 to 3 As shown, a locking anterior spinal plate nail system includes an anterior spinal plate 1 and a plurality of locking nails 2 threadedly arranged on the anterior spinal plate 1, the anterior spinal plate 1 includes a bone plate 11 for connecting the spinal bones and screw holes 12 arranged on the bone plate 11 for installing and locking the locking nails 2, a plurality of universal holes 13 are vertically arranged on the inner wall of the screw hole 12, the plurality of universal holes 13 divide the inner wall of the screw hole 12 into a plurality of staggered tooth areas, an internal thread 14 is fixedly arranged in the staggered tooth area, an oblique surface 15 is arranged at one end of the internal thread 14, and the oblique surface 15 and the outer wall of the internal thread 14 are surrounded to form staggered teeth.

[0024] Locking pin 2 includes:

[0025] The screw body 21 is sleeved in the screw hole 12 and is used to connect the bone plate 11 and the spinal bone.

[0026] A ball head 24 is disposed at the top end of the nail body 21 , and a narrow thread 25 is disposed on the outside of the ball head 24 , and the narrow thread 25 meshes with the staggered teeth.

[0027] During installation, a hole is firstly made at a designated position on the spine, and then one end of the nail body 21 is passed through the screw hole 12 on the bone plate 11, and then one end of the nail body 21 is screwed into the hole on the spine until the ball head 24 enters the screw hole 12 and the narrow thread 25 on the ball head 24 meshes with the internal thread 14, and finally the ball head 24 is screwed in the reverse direction so that the narrow thread 25 meshes with the staggered teeth, so that a staggered tooth effect is formed between the narrow thread 25 and the internal thread 14, thereby improving the locking effect of the nail body 21, and the ball head 24 is continuously screwed in the reverse direction until the staggered teeth are locked. One end of the nail is lifted up until it is deformed, and the ball head is limited and locked by the deformed staggered teeth, so that the nail body 21 and the bone plate 11 are integrated, further improving the firmness and stability of the connection between the two, and avoiding loosening during subsequent use, which affects the recovery effect of the spinal bone. In addition, such a design can also save the need to set a locking plate or a limit pin on the bone plate 11, simplify the structural complexity of the bone plate 11, and also save the use of locking plates or limit pins to limit and fix the locking nails in spinal technical surgical operations, thereby simplifying the surgical steps and improving the surgical efficiency.

[0028] In this embodiment, the staggered tooth areas are relatively distributed in the screw hole 12, and the internal threads 14 in two adjacent staggered tooth areas correspond to each other end to end in the circumferential direction. With such a design, when the nail body 21 is screwed, it is convenient for it to be screwed smoothly in the screw hole 12. In the later stage of screwing the nail body 21, the internal thread 14 is meshed with the narrow thread 25, thereby realizing the initial limiting fixation of the nail body 21 and enabling the nail body 21 to be firmly connected to the hole in the spine.

[0029] In this embodiment, the screw holes 12 are relatively distributed on the bone plate 11, and the screw holes 12 and the universal holes 13 both penetrate the two sides of the bone plate 11. When the nail body 21 is connected to the spinal bone, it is convenient for one end of the nail body 21 to pass through the screw hole 12, and the end of the nail body 21 that passes through the screw hole 12 can be connected with the hole on the spinal bone, thereby completing the fixation of the bone plate 11 on the spinal bone, and the bone plate 11 can be fixed between at least two spinal bones through multiple nail bodies 21, and during the recovery period after spinal surgery, the load of the spinal bone is evenly shared to avoid uneven load affecting the postoperative recovery effect of the spinal bone.

[0030] In this embodiment, the locking nail 2 also includes a wide thread 22 provided at the bottom end of the outside of the nail body 21 and a medium thread 23 provided at the top end of the outside of the nail body 21. The medium thread 23 is located between the ball head 24 and the wide thread 22, and the spiral direction of the medium thread 23 is the same as the spiral direction of the wide thread 22. However, the opposite ends of the two are disconnected and separated, so that when the medium thread 23 enters the hole, the end of the middle thread 23 can scrape out a thread groove on the inner wall of the hole on the spine under the action of torque, and the middle thread 23 is threadedly connected to the inner wall of the hole, and cooperates with the threaded connection between the wide thread 22 and the inner wall of the hole, thereby further improving the connection firmness between the nail body 21 and the inner wall of the hole.

[0031] In this embodiment, the pitch of the middle thread 23 is smaller than the pitch of the wide thread 22, and the pitch of the middle thread 23 is larger than the pitch of the narrow thread 25. After most of the nail body 21 is screwed into the hole on the spine, the different pitches of the wide thread 22 and the middle thread 23 increase the connection effect between the nail body 21 and the inside of the hole, reduce the probability of loosening and withdrawal, and improve the stability of the bone plate 11 during spinal recovery.

[0032] In this embodiment, the locking nail 2 also includes a groove arranged on the top of the ball head 24, and the shape of the groove is polygonal. This design makes it easy to use a corresponding auxiliary tool to insert it into the groove when the nail body 21 is connected to the spine, so that the user can screw the nail body 21 into the hole on the spine by twisting the auxiliary tool.

[0033] Working principle: Before the bone plate 11 is installed on the spine, a hole is first opened at a position on the spine corresponding to the screw hole 12 on the bone plate 11, and then one end of the nail body 21 is passed through the screw hole 12, and then the end passing through the screw hole 12 is screwed into the hole on the spine. During the screwing process of the nail body 21 in the hole, the ends of the wide thread 22 and the bottom ends of the medium thread 23 will scrape out thread grooves on the inner wall of the hole in turn, so as to improve the connection firmness between the wide thread 22 and the medium thread 23 and the inner wall of the hole, until most of the ball head 24 enters the screw hole 12, at this time, the narrow thread 25 on the ball head 24 is engaged with the internal thread 14 in the staggered tooth area, and the bone plate 11 is close to the spine. Finally, press the bone plate 11 to keep it still and screw the nail in the opposite direction. The staggered teeth of the narrow thread 25 and the internal thread 14 can further improve the connection strength and stability between the two, effectively avoiding the problem of loosening and withdrawal of the nail body 21, and can save the production cost of the bone plate 11 by arranging a locking plate or a limit pin thereon, and save the production cost of the bone plate 11, and save the operation step of operating the locking plate or the limit pin to lock the nail body 21 during the operation, thereby reducing the operation steps and improving the operation efficiency.

[0034] The above description is only the preferred embodiment of the utility model, and the parts not described in the utility model can be implemented by adopting or drawing on existing technologies. Of course, the above description is not a limitation of the utility model, and the utility model is not limited to the above examples. The changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the utility model should also fall within the protection scope of the utility model.

Claims

1. A locking type anterior spinal plate nail system, comprising an anterior spinal plate (1) and a plurality of locking nails (2) threadedly arranged on the anterior spinal plate (1), characterized in that: The anterior spine plate (1) comprises a bone plate (11) for connecting the spinal bones and a screw hole (12) provided on the bone plate (11) for installing and locking the locking pin (2), a plurality of universal holes (13) being vertically provided on the inner wall of the screw hole (12), the plurality of universal holes (13) dividing the inner wall of the screw hole (12) into a plurality of staggered tooth areas, an internal thread (14) being fixedly provided in the staggered tooth area, an inclined surface (15) being provided at one end of the internal thread (14), the inclined surface (15) and the outer wall of the internal thread (14) forming staggered teeth together; The locking pin (2) comprises: A screw body (21) sleeved in the screw hole (12) and used for connecting the bone plate (11) and the spinal bone; A ball head (24) is provided at the top end of the nail body (21), and a narrow thread (25) is provided on the outside of the ball head (24), and the narrow thread (25) is meshed with the staggered teeth.

2. The locking anterior spinal plate nail system according to claim 1, characterized in that: The staggered tooth areas are relatively distributed in the screw hole (12), and the internal threads (14) in two adjacent staggered tooth areas correspond end to end in the circumferential direction.

3. The locking anterior spinal plate nail system according to claim 2, characterized in that: The screw holes (12) are relatively distributed on the bone plate (11), and both the screw holes (12) and the universal holes (13) penetrate two sides of the bone plate (11).

4. The locking anterior spinal plate nail system according to claim 3, characterized in that: The locking nail (2) further comprises a wide thread (22) provided at the outer bottom end of the nail body (21) and a medium thread (23) provided at the outer top end of the nail body (21).

5. The locking anterior spinal plate nail system according to claim 4, characterized in that: The pitch of the middle thread (23) is smaller than the pitch of the wide thread (22), and the pitch of the middle thread (23) is larger than the pitch of the narrow thread (25).

6. The locking anterior spinal plate nail system according to claim 5, characterized in that: The locking pin (2) further comprises a groove arranged on the top of the ball head (24), and the shape of the groove is polygonal.

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