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Pier bridge style screw system for vertebral arch pedicle

A pedicle screw and bridge technology, applied in the direction of internal fixator, internal bone synthesis, fixator, etc., can solve the problem of many idle parts, and achieve the effect of avoiding inventory, wide application and low loosening rate

Inactive Publication Date: 2003-06-18
NANJING GENERAL HOSPITAL NANJING MILLITARY COMMAND P L A
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to adapt to the different widths of the distance between the two orthopedic bars, the horizontal connection has many specifications, but only a few specifications are commonly used, and other specifications cannot be left out, so there are many spare parts in stock
There is no report on the connection of the transverse connection directly with the pedicle screw

Method used

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  • Pier bridge style screw system for vertebral arch pedicle
  • Pier bridge style screw system for vertebral arch pedicle
  • Pier bridge style screw system for vertebral arch pedicle

Examples

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Embodiment Construction

[0012] Such as figure 1 , 2 , the pier bridge type pedicle screw system of the present invention, it is made up of several orthopedic rods 1 and cross bridge 2 and a plurality of pedicle screws 3, wherein orthopedic rod 1 is a cylindrical rod body, and cross bridge 2 is a flat square column Body, pedicle screw 3 includes a screw rod 4, the lower body of the screw rod 4 is provided with an external thread 5, and the enlarged screw head 6 at the upper end has a U-shaped deep groove 7 matching the outer diameter of the orthopedic rod 1, and the enlarged screw The two sidewalls of the corresponding U-shaped deep groove 7 of the head 6 are all provided with internal and external threads 8,9, and the feature of the present invention is that on the two sidewalls of the enlarged screw head 6, there are holes corresponding to the direction of the U-shaped deep groove 7. The shallow square groove 10 that is vertical and conforms to the shape of the cross bridge 2, the orthopedic rod 1 ...

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Abstract

An internal fixator for vertebral arch pedicle is composed of several cylindrical correcting rods, flat square transverse bridge, and several screws for vertebral arch pedicle. Said screw has a screw bolt with external spiral thread on its lower part, and an expanded head with a U-shaped deep slot for recepting said correcting rod and shallow square slots on both side surfaces for recepting said transverse bridges.

Description

technical field [0001] The invention relates to a transpedicle internal fixation instrument for orthopedic surgery in a hospital. Background technique [0002] At present, there are many transpedicular internal fixation devices used in orthopedic surgery in hospitals, but most of them have multiple sets and accessories, complex processing, consumables, time-consuming and expensive. Especially the transverse connection is to be connected with two orthopedic rods by a pair of indirect parts, and the production cost, material and time of an indirect part are much higher than that of a screw. In order to adapt to the various widths of the distance between the two orthopedic rods, the horizontal connection is manufactured in a variety of specifications, but only a few specifications are commonly used, and other specifications are indispensable, so there are many idle parts in stock. At present, there are no reports of those who are directly connected to the pedicle screws of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/70A61B17/86
Inventor 毛广平赵建宁王与荣陈跃先黎介寿
Owner NANJING GENERAL HOSPITAL NANJING MILLITARY COMMAND P L A
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