Screw-in type lateral mass fusion cage and matched instrument thereof

Abstract

The utility model relates to a screw-in type lateral mass fusion cage and a matched instrument thereof, the screw-in type lateral mass fusion cage comprises a fusion cage body, the rear end of the fusion cage body is of an open structure, and a screw is screwed in or a threaded rod is adjusted to extend into the front end of the fusion cage body. A threaded hole matched with the adjusting threaded rod is formed in the front end of the fusion cage body, and a threaded head matched with the threaded hole is arranged at one end of the adjusting threaded rod. The screw-in type lateral mass fusion cage can solve the use problem that when a current screw-in type lateral mass fusion cage is screwed in too deep, the current screw-in type lateral mass fusion cage is difficult to retreat and adjust.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of medical apparatus and instruments, especially to a screw-in lateral mass cage and its matching instruments. BACKGROUND

[0002] The screw-in lateral mass cage is a kind of medical apparatus and instruments, mainly used in spinal surgery, especially in the fusion surgery of cervical and thoracolumbar vertebrae. This cage usually includes a cage body, a fixation screw and a screw-in screw, etc. The cage body is fixed on the lateral mass of the vertebral body by the screw-in screw, so as to realize the stability and fusion of the spine.

[0003] The design of the screw-in lateral mass cage aims to reduce trauma and complications during surgery, improve the success rate of surgery and the quality of patient recovery. However, despite its many advantages, the current screw-in lateral mass cage also has some problems in use. One of the more prominent problems is that it is difficult to adjust the screw back when it is screwed in too deep.

[0004] Specifically, due to the design principle and structural characteristics of the screw-in lateral mass cage, once the screw is screwed into the lateral mass of the vertebral body, it is difficult to adjust it back. This is mainly because the connection between the screw and the cage body is tight, and the thread design of the screw makes it gradually tighten during screwing. If the screw is screwed in too deep, it may result in insufficient contact area between the cage and the vertebral body, thereby affecting the fusion effect. In addition, the over-deep screw may also cause compression or damage to the surrounding nerve and vascular structures, increasing the risk of surgery and the occurrence of complications. SUMMARY

[0005] In order to overcome the defects of the prior art, the utility model provides a screw-in lateral mass cage and its matching instruments, which can solve the problem of the current screw-in lateral mass cage that it is difficult to adjust the screw back when it is screwed in too deep.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a screw-in lateral mass cage, which comprises a cage body, the rear end of the cage body is of an open structure, a screw-in screw or an adjusting threaded rod is extended into the front end of the cage body, and a threaded hole matched with the adjusting threaded rod is formed in the front end of the cage body.

[0008] The utility model preferably has the technical scheme that the threaded hole is of a shallow thread structure, and the pitch is greater than the thread height.

[0009] The utility model preferably has the technical scheme that the pitch of the threaded hole is 1.5-3.0 mm, and the thread height is 0.5-1.2 mm.

[0010] The utility model discloses preferably technical scheme at, the upside and / or downside of fusion ware body are provided with the detent portion.

[0011] The utility model discloses preferably technical scheme at, the detent portion is sawtoothed.

[0012] The utility model discloses preferably technical scheme at, fusion ware body includes left wing part and right wing part, and the thickness of left wing part and right wing part is 2.0-4.0mm.

[0013] The utility model discloses preferably technical scheme at, and the outside of left wing part and right wing part is equipped with the clamping groove.

[0014] The utility model discloses preferably technical scheme at, and the material of fusion ware body is medical titanium alloy.

[0015] The utility model discloses a kind of matched instrument of screw-in lateral mass fusion ware, including the screw-in lateral mass fusion ware of above-mentioned technical scheme, still include adjusting threaded rod, and the one end of adjusting threaded rod is equipped with and the screw thread hole is matched screw thread head.

[0016] The utility model has the advantages of:

[0017] The utility model discloses a kind of screw-in lateral mass fusion ware and matched instrument thereof, by using the open type structure at the rear end of fusion ware body, and the screw thread hole of accurate matching with adjusting threaded rod is set in the front end, it is ensured when the adjusting threaded rod of adaptation is closely connected with screw thread hole, can form a stable and reliable connecting point. Through this connecting point, doctor can flexibly use the cooperation mechanism of adjusting threaded rod and screw thread hole in the surgical process, when finding that fusion ware is screwed in too deep, can be pulled back adjusting threaded rod fixed in fusion ware body, realize the pull back adjustment of fusion ware body, to effectively avoid the plight that traditional fusion ware is difficult to adjust when being screwed in too deep. DETAILED DESCRIPTION

[0018] In order to more clearly illustrate the technical scheme in the embodiment of the application or prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced below, and obviously, the drawings in the following description can obtain other drawings according to the drawings for the ordinary skilled in the art without paying the creative labor intensity.

[0019] Figure 1 It is the use schematic drawing of the screw-in lateral mass fusion ware and matched instrument thereof of the utility model embodiment one;

[0020] Figure 2 It is the three-dimensional of the screw-in lateral mass fusion ware of the utility model embodiment one Figure One ;

[0021] Figure 3 The three-dimensional representation of the screw-in side block fusion device of Embodiment 1 of this utility model Figure Two ;

[0022] Figure 4 This is a perspective view of the adjusting threaded rod according to Embodiment 1 of this utility model.

[0023] In the picture:

[0024] 1-Fusion device body; 11-Front end; 12-Rear end; 13-Left wing; 14-Right wing; 2-Threaded hole; 3-Card slot; 4-Clamping groove; 5-Adjusting threaded rod; 51-Threaded head. Detailed Implementation

[0025] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] Example 1

[0027] like Figures 1-4 As shown, this embodiment provides a matching device for a screw-in side block fusion device, including a screw-in side block fusion device and an adjusting threaded rod 5. The screw-in side block fusion device includes a fusion device body 1, with an open rear end 12 for screwing in a screw or adjusting threaded rod 5 extending to the front end 11 of the fusion device body 1. The front end 11 of the fusion device body 1 has a threaded hole 2 that matches the adjusting threaded rod 5, and one end of the adjusting threaded rod 5 has a threaded head 51 that matches the threaded hole 2. The unique feature of this embodiment's screw-in side block fusion device is its open rear end design. This design not only facilitates the easy insertion of the screw or adjusting threaded rod but also provides sufficient space for subsequent adjustment operations. The threaded hole at the front end of the fusion device body precisely matches the adjusting threaded rod; this detail ensures that a stable and reliable connection point is formed when the matching adjusting threaded rod is tightly connected to the threaded hole. Crucially, this connection point allows doctors to flexibly utilize the engagement mechanism between the adjusting threaded rod and the threaded hole during surgery. If the fusion device is found to be screwed in too deeply, the adjusting threaded rod fixed to the fusion device body can be pulled back to adjust the fusion device body, thus effectively avoiding the predicament of traditional fusion devices being difficult to adjust after being screwed in too deeply.

[0028] Preferably, the threaded hole 2 is a shallow thread structure, and the pitch is greater than the thread height. This design first optimizes the screwing efficiency of the thread, and the shallow thread structure reduces the resistance during screwing. In addition, the biomechanical factors are also considered to ensure that the cage can maintain stable mechanical properties when bearing the load of the spine, reduce the compression and damage to the surrounding tissues, and improve the safety and reliability of the operation. Further, the pitch of the threaded hole 2 is 1.5-3.0 mm, and the thread height is 0.5-1.2 mm. The thread height refers to the height of the thread, that is, the distance between the raised part and the recessed part of the thread. The above numerical range ensures that sufficient embedding force can be generated during screwing, so that the combination between the cage and the vertebra is more firm, and the screwing efficiency and stability can be balanced in clinical practice.

[0029] Preferably, the upper side and / or the lower side of the cage body 1 is provided with a detent part 3. This design first improves the fixation effect of the cage between the vertebrae. The detent part can increase the contact area and friction force between the cage and the vertebrae, so that the cage is more stable after implantation and is not easy to loosen or shift. The design of the detent part also helps to promote the bone fusion process. By increasing the contact area between the cage and the vertebrae, the detent part can provide more bone growth space, promote the adhesion and growth of bone cells on the surface of the cage, thereby accelerating the bone fusion process and improving the success rate of the operation and the recovery speed of the patient. Further, the detent part 3 is serrated. The serrated design also helps to promote the bone fusion process. The serrated detent part can provide more bone growth points and attachment surfaces to promote the adhesion and growth of bone cells on the surface of the cage. This design not only accelerates the bone fusion process, but also improves the quality of bone fusion, so that the fused spine is more solid and stable.

[0030] Preferably, the cage body 1 includes a left wing part 13 and a right wing part 14, and the thickness of the left wing part 13 and the right wing part 14 is 2.0-4.0 mm. The thickness of the left wing part 13 and the right wing part 14 in this embodiment is 2.5 mm. The above range of thickness design ensures the stability and reliability of the cage during implantation. Too thin may cause the cage to deform under stress, affecting the fusion effect; while too thick may increase the difficulty of the operation, which is not conducive to the close fit with the surrounding bone tissue. The design of a specific thickness ensures the structural strength of the cage and ensures its good contact with the bone tissue, which is conducive to the bone fusion process. This thickness design helps to reduce surgical trauma and recovery time. The close fit of the cage with the bone tissue reduces the inflammatory reaction and pain caused by excessive gap, and promotes the rapid recovery of the patient.

[0031] Preferably, the outer side of the left wing part 13 and the right wing part 14 is provided with a clamping groove 4. The design of the clamping groove greatly improves the convenience and safety of the surgical operation. During implantation, the clamping groove can serve as a guide to enable the fusion cage to enter the predetermined position more smoothly. The surgeon can easily and accurately place the fusion cage into the affected area using a clamping tool, and then perform subsequent operations, avoiding problems such as deviation of the implantation position or dislocation of the fusion cage due to improper operation. This not only simplifies the surgical procedure, but also shortens the operation time and reduces the risk of surgery.

[0032] Preferably, the material of the fusion cage body 1 is medical titanium alloy. As a high-performance metal material, medical titanium alloy has excellent biocompatibility and corrosion resistance. In the human body environment, medical titanium alloy can maintain good stability and is not easy to cause inflammatory reaction or rejection reaction. This is of great significance to promote bone fusion process and reduce postoperative complications. In addition, medical titanium alloy also has the characteristics of high strength and low density. High strength ensures that the fusion cage can withstand sufficient mechanical load after implantation and is not easy to deform or break; while low density reduces the weight of the fusion cage and reduces the burden on the patient. Medical titanium alloy also has good processing performance and plasticity. This enables the fusion cage to be designed and manufactured individually according to the specific anatomical structure of the patient and the surgical requirements. This customized service not only improves the accuracy and effect of the operation, but also meets the individual needs of different patients.

[0033] The utility model is described through preferred embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the utility model. The utility model is not limited by the specific embodiments disclosed herein, and other embodiments falling within the scope of the claims of the present application all belong to the scope of protection of the utility model.

Claims

1. A screw-in lateral mass fusion cage, characterized in that: a fusion cage body (1) is provided, a rear end (12) of the fusion cage body (1) is in an open structure, and a screw or an adjusting threaded rod (5) is screwed into the fusion cage body (1) to extend to a front end (11) of the fusion cage body (1); the front end (11) of the fusion cage body (1) is provided with a threaded hole (2) matched with the adjusting threaded rod (5).

2. The screw-in lateral mass fusion cage according to claim 1, characterized in that: the threaded hole (2) is in a shallow thread structure, and a thread pitch is greater than a thread height.

3. The screw-in lateral mass fusion cage according to claim 2, characterized in that: the thread pitch of the threaded hole (2) is 1.5-3.0 mm, and the thread height is 0.5-1.2 mm.

4. The screw-in lateral mass fusion cage according to claim 1, characterized in that: a clamping portion (3) is arranged on an upper side and / or a lower side of the fusion cage body (1).

5. The screw-in lateral mass fusion cage according to claim 4, characterized in that: the clamping portion (3) is in a sawtooth shape.

6. The screw-in lateral mass fusion cage according to claim 1, characterized in that: the fusion cage body (1) comprises a left wing portion (13) and a right wing portion (14); thicknesses of the left wing portion (13) and the right wing portion (14) are 2.0-4.0 mm.

7. The screw-in lateral mass fusion cage according to claim 6, characterized in that: the left wing portion (13) and the right wing portion (14) are provided with clamping grooves (4) on outer sides thereof.

8. The screw-in lateral mass fusion cage according to claim 1, characterized in that: a material of the fusion cage body (1) is medical titanium alloy.

9. A kit for a side block cage, characterized in that, the screw-in lateral mass fusion cage according to any one of claims 1-8; an adjusting threaded rod (5) is further provided, and a threaded head (51) matched with the threaded hole (2) is arranged at one end of the adjusting threaded rod (5).

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