Screw structure

A technology of screw and screw seat, which is applied in the direction of internal fixator, internal bone synthesis, fixer, etc., can solve the problems of inconvenient operation, high screw structure notch, etc., which is beneficial to rehabilitation, reliable connection method, and shortens processing time Effect

Pending Publication Date: 2020-08-07
SUZHOU MINIMALLY INVASIVE SPINAL TRAUMA MEDICAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide a screw structure for the problem that the t

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Example Embodiment

[0036] The present invention will be further described below in conjunction with the drawings.

[0037] In order to facilitate the understanding of the present invention, various embodiments defined by the claims of the present invention will be described in a more comprehensive manner with reference to related drawings. The drawings show preferred embodiments of the present invention, which contain various specific details to help the understanding, but these details should be regarded as only exemplary. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Accordingly, those of ordinary skill in the art will recognize that changes and improvements can be made to the various embodiments described herein without departing from the scope of the invention defined by the appended claims. In addition, for clarity and conciseness, descriptions of well-known functions and configurations may be omitted.

[0038]...

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Abstract

The invention relates to a screw structure. The screw structure comprises: a screw body, which comprises a screw head part and a screw rod part which are connected, with a protruding structure arranged on a circumferential surface of the screw head part; a screw base, which is connected to the screw head part, comprises a locking end and a connecting end which are arranged at two ends in the axialdirection, and is internally equipped with an accommodating adjusting cavity and an implantation cavity in a penetrating mode from the locking end to the connecting end, wherein the implantation cavity is used for allowing the screw head part to penetrate through in a matched mode, the accommodating adjusting cavity is used for accommodating the screw head part and providing a space for rotationadjustment of the screw head part in the circumferential direction, a limiting structure is arranged on the surface of the implantation cavity, and the limiting structure limits axial separation of the screw head part and the screw base by stopping the rotated protruding structure from moving towards the connecting end in the axial direction; and a locking piece, which is placed into the accommodating adjusting cavity from the locking end and limits the screw head part to move towards the locking end in the axial direction so as to lock the screw head part. The screw structure is low in incisura, the diameter of the screw rod part is not limited by the diameter of the screw base, and implantation of the screw body is not affected by the screw base.

Description

technical field [0001] The invention relates to the field of connection structure design, in particular to screw structures. Background technique [0002] In the treatment of spinal vertebral body and vertebral fractures, it is necessary to fix the joints with screws. Common screw forms include uniaxial screw and multiaxial screw, long-arm uniaxial screw and long-arm multiaxial screw. At present, the common multiaxial screws on the market are mostly assembled in vitro, and then they are assembled by special tools. Implanted into the pedicle, and then combined with the implant through connecting rods to form a fixed structure, the effect of stabilizing the vertebral body can be achieved. [0003] The multi-axial screw structure is composed of the screw body, pressure block, screw seat and other structures. The structure is relatively complex, the overall axial length is long, the notch is too high, and the interference to the surrounding soft tissue is more obvious, which wi...

Claims

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Application Information

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IPC IPC(8): A61B17/86A61B17/70
CPCA61B17/7001A61B17/8605A61B17/8625A61B17/8665A61B17/8685
Inventor 盛诗权
Owner SUZHOU MINIMALLY INVASIVE SPINAL TRAUMA MEDICAL TECH CO LTD
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