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Pedicle screw

A pedicle screw and screw technology, which is applied in the field of vertebral body surgery fixation devices, can solve the problems of large shearing effect of the thread on the pedicle, loose contact between the bone screw interface, and easy prolapse of the pedicle screw, etc. Good effect, not easy to fall out, fast recovery effect

Inactive Publication Date: 2015-03-11
SHANDONG WEIGAO ORTHOPEDIC DEVICE COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is time-consuming and laborious to screw the pedicle screw into the pedicle, the screw thread has a large shearing effect on the pedicle, great damage to the bone, the contact between the bone screw interface is not tight, and the pedicle screw is easy to come out; especially if the existing The structure of the pedicle screw is applied to the non-fusion operation of the spine. Due to the mobility of the spinal segments involved in the operation, during the recovery process after the operation, due to the movement of the patient, the thread at the upper end of the screw body will cut the bone. recovery is very slow, and there is even a risk of pedicle screw prolapse

Method used

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Embodiment Construction

[0017] Such as figure 1 , figure 2 The pedicle screw shown is composed of a screw body 3 and a U-shaped screw seat 1, the upper end of the screw body 3 is connected with the U-shaped screw seat 1, and the screw body 3 and the U-shaped nail seat 1 can be fixedly connected at a fixed angle, or Universal pedicle screws can be connected through the ball head and ball head seat, and the two can also be hinged or snap-fitted into a single-plane pedicle screw whose screw body can only swing in one plane. The above-mentioned connection relationship belongs to The prior art will not be repeated here. The present invention is characterized in that the outer surface of the screw body 3 is a polished rod from the upper end to 1 / 3-1 / 2 of the axial length of the screw body 3, and the outer side of the screw body at the polished rod is provided with a porous healing layer. Layer means that a healing layer is provided on the screw body, and there are healing holes 8 in the healing layer wi...

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Abstract

The invention relates to a fixing device for operation on the pedicle, and particularly relates to a pedicle screw. The pedicle screw comprises a screw body and a U-shaped screw base, wherein the upper end of the screw body is connected with the U-shaped screw base; the upper 1 / 3-1 / 2 part of the screw body is an unthreaded rod; the unthreaded rod is externally provided with a porous healing layer; and the lower part of the screw body is provided with threads. The pedicle screw provided by the invention has the advantages that the pedicle screw can be easily turned into the pedicle by consuming the least time and labor, causes little shearing action and damage on the pedicle, can be merged into the bone tightly without separation, can ensure that a patient recovers rapidly after operation, has a good treatment effect and is suitable for non-merged operation on the pedicle.

Description

technical field [0001] The invention relates to a vertebral body operation fixation device, in detail, it is a pedicle screw which has a small shearing effect on the pedicle, closely contacts the interface of the bone nail, and prevents the prolapse of the nail body. Background technique [0002] We know that in the treatment of spinal lesions, spinal non-fusion technology has little damage to the spine, maintains the mobility and stability of the spine, rebuilds the biomechanical properties of the intervertebral disc, and prevents and reduces the degeneration of the adjacent segmental intervertebral disc. Acceleration and other advantages, many hospitals have begun to adopt it in recent years, and its application prospect is bright. The pedicle screws currently used in spinal surgery include a U-shaped screw base and a screw body. The screw body and the U-shaped screw base can be fixedly connected at a fixed angle, or can be connected into a universal screw through a ball h...

Claims

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Application Information

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IPC IPC(8): A61B17/70A61B17/86
CPCA61B17/7001A61B17/7061A61B17/86A61B2017/8655
Inventor 郝定均王晗高亚军赵锋杨双
Owner SHANDONG WEIGAO ORTHOPEDIC DEVICE COMPANY
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