Lateral anterior approach resettable intervertebral disc prosthesis

Abstract

A lateral anterior approach resettable intervertebral disc prosthesis comprises a prosthesis body (1) and two fixing screws (2) installed at the rear end of the prosthesis body (1), the upper side and the lower side of the prosthesis body (1) are each provided with a set of vertical inclined guide grooves (3) in the length direction of the prosthesis body (1), and the upper set of vertical inclined guide grooves (3) and the lower set of vertical inclined guide grooves (3) are opposite in direction. The upper side and the lower side of the prosthesis body (1) located at the rear end are each provided with a set of transverse anti-skid teeth (4). The prosthesis has the advantages that through the two sets of vertical inclined guide grooves formed in the upper side and the lower side of the prosthesis body, when the prosthesis body is impacted and implanted into the space between two vertebral bodies, the vertical inclined guide grooves can exert reverse pulling force on the two vertically-adjacent vertebral bodies, so that the vertebral bodies are reset, the structure is simple, the operation difficulty is reduced, and the operation efficiency is improved. And one-step resetting and fixing are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of intervertebral fusion implantation, in particular to a lateral anterior approach repositionable intervertebral disc prosthesis. Background Art

[0002] Lumbar fusion is often used when patients have lumbar spondylolisthesis. In order to stabilize the adjacent slipped vertebrae, a fusion device is placed between the slipped vertebrae and bone grafting is performed for internal fixation to achieve the reduction and fusion of the slipped vertebrae and relieve the patient's pain symptoms. However, the existing operation technology requires more equipment, long operation time, great trauma and complicated procedures. Utility Model Content

[0003] The purpose of the utility model is to provide a lateral anterior approach repositionable intervertebral disc prosthesis in view of the above-mentioned deficiencies.

[0004] The utility model comprises a prosthesis body and two fixing screws installed at the rear end of the prosthesis body. A group of vertical inclined guide grooves are arranged on the upper and lower sides of the prosthesis body along its length direction, and the directions of the upper and lower groups of vertical inclined guide grooves are opposite. A group of horizontal anti-slip teeth are arranged on the upper and lower sides of the prosthesis body at the rear end.

[0005] The middle parts of the left and right sides of the prosthesis body are both provided with bone grafting grooves which penetrate front and back, and a group of through holes which penetrate the prosthesis body transversely are provided in the bone grafting grooves.

[0006] A group of hollow holes extending downward to the through hole are arranged in the vertical inclined guide groove.

[0007] The transverse anti-skid teeth are oblique teeth with one top end tilted backwards.

[0008] The rear end of the prosthesis body is provided with an implant operating member connecting hole, and two fixing screws are respectively located on both sides of the implant operating member connecting hole, and the two fixing screws are respectively extended obliquely in opposite directions to the upper and lower front ends of the prosthesis body.

[0009] The utility model has the advantages that, through the two sets of vertical inclined guide grooves on the upper and lower sides of the prosthesis body, when the prosthesis body is implanted between two vertebrae, the vertical inclined guide grooves can exert a reverse pulling force on the two upper and lower adjacent vertebrae, thereby resetting the vertebrae, the structure is simple, the difficulty of surgery is reduced, and resetting and fixation are achieved in one step. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the utility model.

[0011] Figure 2 It is a structural schematic diagram of the utility model from a second viewing angle. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0013] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0014] In the description of the embodiments of the present utility model, it should be noted that if the terms "upper", "lower", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, if the terms "first", "second", etc. appear in the description of the present utility model, they are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0015] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set" and "connection" 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 components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0016] As shown in the accompanying drawings, the utility model includes a prosthesis body 1 and two fixing screws 2 installed at the rear end of the prosthesis body 1. A group of vertical inclined guide grooves 3 are provided on the upper and lower sides of the prosthesis body 1 along its length direction, and the directions of the upper and lower groups of vertical inclined guide grooves 3 are opposite. A group of transverse anti-slip teeth 4 are provided on the upper and lower sides of the prosthesis body 1 located at the rear end.

[0017] The prosthesis body 1 is a rectangular parallelepiped structure, and the upper, lower, left and right side surfaces of its front end are all close to the middle to form a conical structure. The four sides of the conical structure are arc-shaped surfaces. The prosthesis in this case is implanted from the side of the two vertebrae, and a part of the front end of the vertical inclined guide groove 3 extends to the conical structure. When implanted, it hits the rear end of the prosthesis body 1. When the prosthesis body 1 is forcibly implanted, the vertical inclined guide grooves 3 on the upper and lower sides guide the vertebrae to the middle, so that the upper and lower vertebrae are reset. A group of transverse anti-slip teeth 4 can prevent the prosthesis body 1 from falling off backwards after implantation.

[0018] Furthermore, bone grafting grooves 5 penetrating from front to back are provided at the middle of the left and right sides of the prosthesis body 1 , and a group of through holes 6 penetrating the prosthesis body 1 transversely are provided in the bone grafting grooves 5 .

[0019] The bone grafting groove 5 and the through hole 6 facilitate artificial bone grafting after the prosthesis body 1 is implanted, and fill the two sides of the prosthesis body 1 to facilitate firmer bone healing.

[0020] Furthermore, a group of hollow holes 7 extending downward to the through hole 6 are provided in the vertically inclined guide groove 3 .

[0021] The hollow holes 7 facilitate the growth of bones into the prosthesis body 1, and the upper and lower vertebrae can grow into one body with the prosthesis body 1, making it more solid.

[0022] Furthermore, the transverse anti-slip teeth 4 are inclined teeth with one end inclined upward, which can effectively prevent the prosthesis body 1 from sliding backward.

[0023] Furthermore, the rear end of the prosthesis body 1 is provided with an implant operating member connection hole 9, and two fixing screws 2 are respectively located on both sides of the implant operating member connection hole 9, and the two fixing screws 2 extend obliquely in opposite directions to the upper and lower front ends of the prosthesis body 1. That is, the fixing screws 2 are fixed on the vertebral body obliquely upward and forward, and the two fixing screws 2 fix the corresponding vertebral bodies respectively. After the prosthesis body 1 is implanted, the two vertebral bodies can be effectively fixed to prevent the vertebral body from slipping and dislocation.

Claims

1. A lateral anterior approach repositionable intervertebral disc prosthesis, characterized in that The invention comprises a prosthesis body (1) and two fixing screws (2) installed at the rear end of the prosthesis body (1); a group of vertical inclined guide grooves (3) are provided on the upper and lower sides of the prosthesis body (1) along its length direction, and the directions of the upper and lower groups of vertical inclined guide grooves (3) are opposite; and a group of transverse anti-slip teeth (4) are provided on the upper and lower sides of the prosthesis body (1) at the rear end.

2. The lateral anterior approach repositionable intervertebral disc prosthesis according to claim 1, characterized in that A bone grafting groove (5) penetrating front to back is provided at the middle of the left and right sides of the prosthesis body (1), and a group of through holes (6) penetrating transversely through the prosthesis body (1) are provided in the bone grafting groove (5).

3. The lateral anterior approach repositionable intervertebral disc prosthesis according to claim 2, characterized in that A group of hollow holes (7) extending downward to the through hole (6) are provided in the vertically inclined guide groove (3).

4. The lateral anterior approach repositionable intervertebral disc prosthesis according to claim 1, characterized in that The transverse anti-slip teeth (4) are oblique teeth with one end of the top tilted backwards.

5. The lateral anterior approach repositionable intervertebral disc prosthesis according to claim 1, characterized in that An implant operating member connection hole (9) is provided at the rear end of the prosthesis body (1), and two fixing screws (2) are respectively located on both sides of the implant operating member connection hole (9), and the two fixing screws (2) extend obliquely in opposite directions to the upper and lower front ends of the prosthesis body (1).

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