Double-groove channel-to-channel connection type percutaneous vertebral pedicle screw nail internal fixation system

A technology of pedicle screw and channel connection, which is applied in the direction of internal fixator, fixator, internal bone synthesis, etc., can solve the problems of increasing the difficulty of operation, prolonging the operation time, and expensive operation, so as to reduce the surgical trauma, reduce the Intraoperative trauma and the effect of shortening the operation time

Inactive Publication Date: 2008-12-24
THE SECOND AFFILIATED HOSPITAL ARMY MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these complicated auxiliary equipment also make the operation expensive and the operation is more complicated, which prolongs the operation time and increases the operation trauma to a certain extent.
At the same time, its working channel can only adapt to one way of connecting rod placement. Although it is s

Method used

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  • Double-groove channel-to-channel connection type percutaneous vertebral pedicle screw nail internal fixation system
  • Double-groove channel-to-channel connection type percutaneous vertebral pedicle screw nail internal fixation system
  • Double-groove channel-to-channel connection type percutaneous vertebral pedicle screw nail internal fixation system

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Experimental program
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Embodiment Construction

[0028] The structure of this fixing system will be described in detail below in conjunction with the accompanying drawings:

[0029] see figure 1 and figure 2 , the fixation system consists of three parts: a double-slot channel-connected pedicle screw, a screw plug 3 and a connecting rod 4, wherein: the double-slot channel-connected pedicle screw includes two parts: a pedicle screw and a double-slot connecting channel;

[0030] A pedicle screw consists of a screw shank 7 and a screw head 2, see Figure 5 and Figure 6 , the screw rod 7 has a self-tapping external thread, with a central channel inside, and its upper end is a hemispherical joint, which is assembled in the spherical cavity at the lower end of the screw head 2. And the positioning washer 5, the hemispherical joint of the screw rod 7 has an inner hexagonal hole, which is matched with the auxiliary insertion tool; the lower part of the screw head 2 is a spherical cavity, and the upper part is a pipe joint with a...

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Abstract

The present invention relates to a twin-trough channel connecting percutaneous pedicle screw inner fixing system, which comprises a twin-trough channel connecting pedicle screw, a connecting rod and a plug screw. The twin-trough channel connecting pedicle screw comprises a pedicle screw and a double-trough connecting channel. The twin-trough connecting channel is a hollow tube and one side of the tube wall is provided with a whole rabbet; the internal side of two thirds tube wall above the opposite side is provided with a groove and the one third tube wall below is provided with an inverted U-shaped semi-rabbet; when the connecting channel is completely connected with the screw, the two rabbets are superimposed; the connecting channel is connected with the pipe interface of the pedicle screw head through screw threaded covered joint, cutting grafting, clamped joint or a long needle axial fixed connecting structure and is provided with an internal screw thread on the lower one second section inside the channel, which is connected with the internal screw thread of the tube joint of the screw head. The present invention adopts the integrated design of the twin-trough work channel and the screw, thus avoiding multiple replacement of expansion channel, reducing the damages of the approach tissue caused by multiple entering, simplifying the operational machinery and shortening the operation time.

Description

technical field [0001] The invention relates to an internal fixation operation device for spinal surgery, and more specifically, relates to a posterior spinal percutaneous pedicle screw internal fixation system for treating motion segments of spinal lesions. Background technique [0002] At present, the surgical treatment of spinal trauma, degenerative diseases, degenerative diseases and other spinal instability diseases often requires the use of spinal internal fixation devices. The purpose of applying spinal internal fixation devices is to provide strong fixation and strong support to maintain the correction of deformity, ensure the stability of the surgical segment, promote fusion, and allow early mobilization of the patient with minimal or no external fixation support. . [0003] Pedicle screws were conceived in 1944 and used to fix the lumbosacral joint with success until 1959. In 1970, doctors in France and Switzerland began to use pedicle screws clinically. After i...

Claims

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Application Information

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IPC IPC(8): A61B17/70
Inventor 周跃吕宏琳
Owner THE SECOND AFFILIATED HOSPITAL ARMY MEDICAL UNIV
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