Combined type percutaneous zygopophysis pedicle screw internal fixation system

Abstract

The invention relates to a lumbar vertebral arc interval fixation bolt for hospital orthopedics operations and an application device of the bolt, and especially to a combined type percutaneous zygopophysis vertebral pedicle internal fixation system which comprises a locating sheathing canal used for determining bolt settlement angle and a body surface position, a corresponding inner core, a guide needle used for determining bolt settlement depth, an expander used for expanding a human body bolt settlement channel, a medical hollow drill and a drilling jig for drilling bones, a tapping screw rod, a bolt installing device and a pedicle bolt. The pedicle bolt is divided into a third thread segment, a fourth thread segment and a lifting nut in turn from the front end to the rear end. The bolt installing device is a double layer sleeve structure. A locking mechanism is arranged between rear ends of an inner layer sleeve and an outer sleeve. The invention provides the combined type percutaneous zygopophysis vertebral pedicle internal fixation system which is simple in operation and low in improved cost and overcomes the technology faults of complex accessories, many dedicated devices and high production in the prior art.

Description

technical field [0001] The invention relates to a lumbar vertebral arch internal fixation screw for hospital orthopedic surgery and an application device for the screw, belonging to the field of medical instruments. Background technique [0002] The increasingly developed medical technology in today's world has successfully solved a large number of difficult and miscellaneous diseases that were difficult to cure in the past, but at the same time, changing diseases are also emerging with the upgrading of technology, so how to improve the treatment effect is placed on the majority of scientific researchers. before. [0003] Chinese invention patent 02157300.X discloses a pier bridge type pedicle system, which is composed of several orthopedic rods, cross bridges and multiple pedicle screws. The orthopedic rods are cylindrical rods, and the cross bridges are flat square cylinders. The pedicle screw includes a screw rod, the lower body of the screw rod is provided with external...

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Problems solved by technology

[0006] Although the above-mentioned inventions have their own characteristics, they all have some defects, such as more complicated accessories, more special equipment, higher production costs, poor effect after product application, and cumbersome operation steps, etc.

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