Lumbar lateral anterior zero-incisura fusion cage

Abstract

The utility model relates to the technical field of medical instruments, in particular to a lumbar lateral anterior zero-incisura fusion cage which comprises a fixing plate. The fusion cage body and the pair of locking pieces are connected to the same side of the fixing plate; the pair of locking pieces is located on the two sides of the fusion cage body, and the pair of locking pieces are parallel to each other. According to the lumbar lateral anterior zero-incisura fusion cage, the fusion cage body and the pair of locking pieces are both connected to the same side of the fixing plate, the pair of locking pieces are located on the two sides of the fusion cage body and are parallel to each other, multi-segment implantation can be achieved, the implantation angle of the locking pieces is easier to master in the operation, the operation time is shortened, and when the fusion cage is used, the fusion cage is not prone to being damaged. Bone cement can be pre-prepared in the nail channel in advance, the locking piece and the fusion cage body are implanted, the fixing plate is finally implanted, the fixing plate is connected with the locking piece, an operation is completed, the operation is more visual, operation is convenient, and the fusion cage is suitable for being used by common patients and osteoporosis patients and wider in application range.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field especially relates to a lumbar lateral anterior zero incision fusion ware. BACKGROUND

[0002] When the intervertebral disc of the lumbar vertebrae is diseased or necrotic, interbody fusion surgery is needed. The traditional surgical plan is to remove the diseased intervertebral disc, and then place an interbody fusion cage in the removed intervertebral disc site.

[0003] In the prior art, the lumbar lateral anterior zero incision fusion cage is pre-assembled with a fixed steel plate and a fusion cage body. During the operation, the fusion cage and the fixed steel plate need to be implanted together. However, due to the fact that most of the vertebral screws are at an angle, when multiple segments are implanted, the vertebral screws of adjacent segments are prone to cross and interfere, making it impossible to implant.

[0004] Furthermore, the lumbar lateral anterior zero incision fusion cage with the above structure is not effective for osteoporotic patients. INVENTION CONTENTS

[0005] The utility model provides a lumbar lateral anterior zero incision fusion cage to solve the defects that the vertebral screws of adjacent segments are prone to cross and interfere in the prior art, and the effect is not good for osteoporotic patients. It realizes multi-segment implantation, the implantation angle of the vertebral screw is easier to control during the operation, the operation time is shortened, the operation is more intuitive, the operation is convenient, it is suitable for ordinary patients and osteoporotic patients, and the use range is wider.

[0006] The utility model provides a lumbar lateral anterior zero incision fusion cage, which comprises:

[0007] A fixed plate;

[0008] A fusion cage body and a pair of locking members are connected to the same side of the fixed plate. The pair of locking members are located on both sides of the fusion cage body, and the pair of locking members are parallel to each other.

[0009] According to the lumbar lateral anterior zero incision fusion cage provided by the utility model, the locking member is a vertebral screw.

[0010] According to the lumbar lateral anterior zero incision fusion cage provided by the utility model, the end of the vertebral screw away from the fixed plate is provided with a self-tapping structure.

[0011] According to the lumbar lateral anterior zero incision fusion cage provided by the utility model, the thread pitch of the end of the vertebral screw away from the fixed plate is greater than that of the other end.

[0012] According to the lumbar lateral anterior zero incision fusion cage provided by the utility model, the end of the vertebral screw close to the fixed plate is a double-thread screw.

[0013] The utility model provides a lumbar lateral anterior zero incision fusion ware, the fixed plate includes steel sheet.

[0014] The utility model provides a lumbar lateral anterior zero incision fusion ware, the fixed plate is arc plate, and the fixed plate protrudes to the side of the vertebral body screw.

[0015] The utility model provides a lumbar lateral anterior zero incision fusion ware, the vertebral body screw is connected with the fixed plate threadedly.

[0016] The utility model provides a lumbar lateral anterior zero incision fusion ware, the fixed plate is provided with sunken hole on the side away from the locking piece, the sunken hole is used for accommodating the nut, and the nut is connected with the locking piece threadedly.

[0017] The utility model provides a lumbar lateral anterior zero incision fusion ware still includes locking screw, the fusion ware body is provided with threaded hole on the side close to the fixed plate, is provided with through -hole on the fixed plate, locking screw passes through the through -hole and is connected with the threaded hole.

[0018] The utility model provides a lumbar lateral anterior zero incision fusion ware, through fusion ware body and a pair of locking piece all are connected to the same side of fixed plate, a pair of locking piece is located the both sides of fusion ware body, and a pair of locking piece is parallel with each other, that is, two vertebral body screws head -tail included angle is 0, can be implanted in more segment, and the vertebral body screw implantation angle is easier to grasp in the operation, shortens the operation time, and the product vertebral body screw is designed to be reversed, can pre -punch bone cement in the nail way, implants vertebral body screw, fusion ware, finally implants fixed steel sheet, connects fixed steel sheet with vertebral body screw, completes the operation. The operation is more intuitive, and it is convenient to operate, is suitable for ordinary patients and osteoporotic patients, and the application range is wider. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor.

[0020] Figure 1 It is the structure schematic view of the lumbar lateral anterior zero incision fusion ware in an embodiment provided by the utility model.

[0021] Figure 2 It is the structure schematic view of the vertebral body screw in an embodiment provided by the utility model.

[0022] Figure 3It is a structural schematic diagram of a fixing plate in an embodiment provided by the utility model.

[0023] Reference numerals:

[0024] 1. Fixing plate; 2. Fusion device body; 3. Locking piece; 4. Self-tapping structure; 5. Sinking hole; 6. Locking screw. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0027] The following combination Figures 1-3 Description: The utility model provides a lumbar lateral anterior zero-profile fusion device, which includes a fixation plate 1, a fusion device body 2 and a pair of locking members 3.

[0028] like Figure 1 As shown, the fixation plate 1 serves as the basic supporting structure of the fusion device body 2 and is designed with a shape and size that are suitable for lumbar anterior surgery so as to be stably fixed on the vertebral body.

[0029] The fusion device body 2 is located on one side of the fixation plate 1 and is used to fill the gap between vertebrae and promote bone fusion. It is typically made of biocompatible metal or polyetheretherketone (PEEK), with micropores or a coating designed to promote bone ingrowth. A pair of locking members 3 are located on either side of the fusion device body 2 and are parallel to each other.

[0030] The design of the locking member 3 aims to further fix the connection between the fusion device body 2 and the fixation plate 1, while ensuring that the fusion device as a whole can be stably maintained at the intended position after implantation, avoiding displacement or loosening. The locking member 3 can be connected to the fixation plate 1 and the fusion device body 2 through threads, buckles or other reliable mechanical connection methods.

[0031] The fusion device body 2 and the pair of locking members 3 are connected to the same side of the fixation plate 1; the pair of locking members 3 are located on both sides of the fusion device body 2, and the pair of locking members 3 are parallel to each other.

[0032] The lumbar lateral anterior zero-incision fusion device provided by the utility model, through the fusion device body 2 and the pair of locking members 3 being connected to the same side of the fixation plate 1, the pair of locking members 3 being located on both sides of the fusion device body 2, and the pair of locking members 3 being parallel to each other, namely, the pair of locking members 3 having a 0° included angle at the head and tail, being capable of being implanted in multiple segments, the implantation angle of the locking member 3 being easier to grasp during the operation, the operation time being shortened, the locking member of the product being designed in a reverse manner, being capable of pre-punching bone cement in a nail channel, implanting the locking member 3 and the fusion device body 2, and finally implanting the fixation plate 1, connecting the fixation plate 1 and the locking member 3, and completing the operation. The operation is more intuitive and convenient to operate, is suitable for ordinary patients and osteoporotic patients, and has a wider application range.

[0033] In one feasible embodiment of the utility model, the locking member 3 is a vertebral screw. As the locking member 3, the vertebral screw can firmly fix the fusion device body 2 on the fixation plate 1 and form a stable connection with the adjacent vertebral body. This connection mode ensures the stability and durability of the fusion device after implantation, reducing the risk of displacement or loosening. The implantation of the screw helps to promote the close contact between the vertebral bodies, providing good conditions for bone fusion. The threaded design of the screw can increase the contact area with the bone, improve the fixation strength of the fusion device, and accelerate the bone fusion process.

[0034] As shown in Figure 1 and Figure 2 In one feasible embodiment of the utility model, the end of the vertebral screw away from the fixation plate 1 is provided with a self-tapping structure 4. The self-tapping structure 4 can reduce the resistance during implantation. It should be noted that the self-tapping structure 4 is usually provided in a sharp structure. The self-tapping structure 4 can adaptively adjust according to the hardness and density of different bone qualities, ensuring consistent implantation effect of the screw in different patients and different parts. This design improves the flexibility and adaptability of the operation.

[0035] As shown in Figure 1 and Figure 2As shown in a feasible embodiment of the present utility model, the thread pitch of the vertebral body screw away from one end of the fixation plate 1 is greater than the other end. The larger thread pitch may reduce friction with the bone during implantation, thereby reducing the implantation resistance. This helps the doctor to rotate the screw into the vertebral body more smoothly, reducing the operation time and the patient's pain. The design of the vertebral body screw needs to consider the bone condition of different patients. The larger thread pitch away from one end of the fixation plate 1 may be to adapt to different hardness and density of the bone, to ensure the consistency of the implantation effect of the screw in different patients and different parts.

[0036] As shown in a feasible embodiment of the present utility model, the thread pitch of the vertebral body screw away from one end of the fixation plate 1 is greater than the other end. The larger thread pitch may reduce friction with the bone during implantation, thereby reducing the implantation resistance. This helps the doctor to rotate the screw into the vertebral body more smoothly, reducing the operation time and the patient's pain. The design of the vertebral body screw needs to consider the bone condition of different patients. The larger thread pitch away from one end of the fixation plate 1 may be to adapt to different hardness and density of the bone, to ensure the consistency of the implantation effect of the screw in different patients and different parts. Figure 2 As shown in a feasible embodiment of the present utility model, the thread pitch of the vertebral body screw away from one end of the fixation plate 1 is greater than the other end. The larger thread pitch may reduce friction with the bone during implantation, thereby reducing the implantation resistance. This helps the doctor to rotate the screw into the vertebral body more smoothly, reducing the operation time and the patient's pain. The design of the vertebral body screw needs to consider the bone condition of different patients. The larger thread pitch away from one end of the fixation plate 1 may be to adapt to different hardness and density of the bone, to ensure the consistency of the implantation effect of the screw in different patients and different parts.

[0037] It should be noted that the double thread corresponds to the cortical bone, increasing the holding force at the cortical bone. For example, in patients with osteoporosis or parts that require higher strength fixation, the design of double thread can better meet these special needs. By increasing the number and density of threads, a stronger fixation effect can be provided, reducing the risk of postoperative loosening or backout.

[0038] As shown in a feasible embodiment of the present utility model, the thread pitch of the vertebral body screw away from one end of the fixation plate 1 is greater than the other end. The larger thread pitch may reduce friction with the bone during implantation, thereby reducing the implantation resistance. This helps the doctor to rotate the screw into the vertebral body more smoothly, reducing the operation time and the patient's pain. The design of the vertebral body screw needs to consider the bone condition of different patients. The larger thread pitch away from one end of the fixation plate 1 may be to adapt to different hardness and density of the bone, to ensure the consistency of the implantation effect of the screw in different patients and different parts. Figure 3 As shown in a feasible embodiment of the present utility model, the fixation plate 1 comprises a steel plate, which has high strength and stiffness, and can ensure that the fusion cage maintains a stable fixation form during the operation and postoperative recovery. This is crucial for promoting intervertebral fusion and reducing the risk of implant loosening or migration.

[0039] As shown in a feasible embodiment of the present utility model, the fixation plate 1 is an arc-shaped plate, and the fixation plate 1 protrudes towards the side away from the vertebral body screw. The spine has a physiological curvature in a natural state, and the design of the arc-shaped plate can better fit the curvature of the spine, reduce stress concentration between the implant and the vertebral body, and improve the stability of the operation and the comfort of the patient. The arc-shaped plate protrudes towards the side away from the vertebral body screw, which can increase the contact area between the fixation plate 1 and the vertebral body. A larger contact area means more uniform stress distribution, which helps to reduce the risk of implant loosening or migration. By increasing the contact area and the fit, the arc-shaped plate design can provide stronger fixation strength. This helps to ensure that the fusion cage can maintain stability during the operation and postoperative recovery, promoting intervertebral fusion. Figure 3

[0040] ​In a feasible embodiment of the present invention, the vertebral screw is threadedly connected to the fixation plate 1, and a firm connection between the vertebral screw and the fixation plate is achieved through the tight fit of the threads, which has high stability, helps to reduce the risk of loosening or displacement of the implant, and improves the success rate of the operation and the patient's recovery effect.

[0041] like Figure 3 As shown, in a feasible embodiment of the present invention, a sink hole 5 is provided on the side of the fixing plate 1 away from the locking member 3. The sink hole 5 is used to accommodate a nut, which is threadedly connected to the locking member 3. The main function of the sink hole 5 is to provide a space to accommodate the nut so that the nut does not protrude from the surface of the fixing plate 1 after installation, thereby maintaining the aesthetics and flatness of the structure. By embedding the nut in the sink hole 5, the contact area between the nut and the fixing plate 1 can be increased, thereby improving the stability and load-bearing capacity of the connection. The design of the sink hole 5 helps to disperse the stress around the nut and reduce the risk of material fatigue or damage due to stress concentration.

[0042] In a feasible embodiment of the present invention, a locking screw 6 is further included. A threaded hole is provided on one side of the fusion device body 2 close to the fixing plate 1. A through hole is provided on the fixing plate 1. The locking screw 6 passes through the through hole and is connected to the threaded hole. The locking screw 6 passes through the through hole on the fixing plate 1 and is connected to the threaded hole on the fusion device body 2, forming an additional fixing point. This double fixation (i.e., the connection between the original nut and the locking member 3 plus the connection of the locking screw 6) significantly enhances the connection strength between the fusion device body 2 and the fixing plate 1. In spinal surgery or other applications requiring high stability, it is crucial to prevent the implant from loosening. The introduction of the locking screw 6 can further reduce the risk of loosening due to vibration, impact or long-term stress.

[0043] In summary, the lumbar lateral anterior zero-profile fusion device provided by the present invention can be used for multi-segment implantation, making the operation more convenient, shortening the operation time, and being applicable to a wider range of people, including patients with normal bone density and osteoporosis.

[0044] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0045] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "aspects", "specific aspects", or "some aspects" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or aspect are included in at least one embodiment or aspect of the embodiments of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or aspect. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or aspects. In addition, those skilled in the art can combine and combine the different embodiments or aspects described in the present specification and the features of the different embodiments or aspects, without contradiction.

[0046] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A zero-profile interbody fusion cage for lateral anterior approach to the lumbar spine, characterized in that, The utility model relates to a kind of spinal fusion device, including: Fixed plate (1); Fusion body (2) and a pair of locking pieces (3) are connected to the same side of the fixed plate (1);A pair of the locking pieces (3) are located on both sides of the fusion body (2), and a pair of the locking pieces (3) are parallel to each other.

2. The zero-profile lumbar lateral interbody fusion cage of claim 1, wherein, The locking piece (3) is a vertebral screw.

3. The zero-profile lumbar lateral interbody fusion cage of claim 2, wherein, The vertebral screw is provided with a self-tapping structure (4) at one end away from the fixed plate (1).

4. The zero-profile lumbar lateral interbody fusion cage of claim 2, wherein, The thread pitch of the vertebral screw at one end away from the fixed plate (1) is greater than the other end.

5. The zero-profile lumbar lateral interbody fusion cage of claim 2, wherein, The end of the vertebral screw close to the fixed plate (1) is double-threaded.

6. The zero-profile lumbar lateral interbody fusion cage of claim 1, wherein, The fixed plate (1) includes a steel plate.

7. The zero-profile lumbar lateral interbody fusion cage of claim 2, wherein, The fixed plate (1) is an arc-shaped plate, and the fixed plate (1) protrudes towards the side away from the vertebral screw.

8. The zero-profile lumbar lateral interbody fusion cage of claim 2, wherein, The vertebral screw is threadedly connected with the fixed plate (1).

9. The zero-profile lumbar lateral interbody fusion cage of claim 1, wherein, The side of the fixed plate (1) away from the locking piece (3) is provided with a sunken hole (5), and the sunken hole (5) is used to accommodate a nut, and the nut is threadedly connected with the locking piece (3).

10. The zero-profile lumbar lateral interbody fusion cage of claim 1, wherein, Further comprising a locking screw (6), the side of the fusion body (2) close to the fixed plate (1) is provided with a threaded hole, the fixed plate (1) is provided with a through hole, and the locking screw (6) is connected with the threaded hole through the through hole.

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