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Loosening-preventing vertebral pedicle screw-rod system

A pedicle screw and anti-loosening technology, which is applied in the field of implants in the human body of medical devices, can solve the problems of inconvenient assembly of the locking head and easy loosening of the locking head

Pending Publication Date: 2018-02-16
李照文
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an anti-loosening device with simple structure and reasonable design to solve the problems of easy loosening of locking screw plugs and locking heads and other parts existing in the existing pedicle screw rod system and inconvenient assembly of the locking head. Deverted Pedicle Screw-Rod System

Method used

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  • Loosening-preventing vertebral pedicle screw-rod system
  • Loosening-preventing vertebral pedicle screw-rod system
  • Loosening-preventing vertebral pedicle screw-rod system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0071] The anti-loosening pedicle screw rod system is composed of two fixing rods 1, bone penetration screws, locking heads, connecting plates 24 and locking screw plugs 3; each fixing rod 1 is respectively equipped with one or more lock head.

[0072] The locking head is composed of a locking seat 23 and a locking stud 25; the inner thread of the locking seat 23 is equipped with a locking stud 25; the cross section of the locking stud 25 is approximately "convex" (see the attached manual). image 3 ). The purpose of setting the locking stud 25 in this way is to restrict it in the locking seat 23 by the thick end portion of the locking stud 25, thereby avoiding the accident that the locking stud 25 falls off from the locking seat 23 .

[0073] The locking seat 23 below the locking stud 25 is provided with a fixed rod through hole 26; between the fixed rod through hole 26 and the locking stud 25, a connecting plate through hole 27 is arranged in a "ten" cross shape; The head...

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Abstract

The invention relates to a loosening-preventing vertebral pedicle screw-rod system and belongs to the technical field of human body implantation materials of medical apparatuses and instruments. The loosening-preventing vertebral pedicle screw-rod system is composed of two fixing rods, bone screws, locking heads, a connecting plate and locking plug screws. The fixing rods are correspondingly provided with one or more locking heads. The corresponding locking heads are connected through the connecting plate. The fixing rods on two sides of the locking heads are provided with multiple bone screwsthrough the locking plug screws. The locking heads are composed of locking seats and locking screw bolts. The locking screw bolts are installed in the locking seats in a threaded mode. Fixing rod through holes are formed in the locking seats below the locking screw bolts. The loosening-preventing vertebral pedicle screw-rod system is reasonable in structure and ingenious in design. The problem issolved that locking plug screws and other parts of an existing vertebral pedicle screw-rod system have certain loosening risk and locking heads are inconvenient to assemble, and the long-time safe use demands of patients are met.

Description

technical field [0001] The invention relates to an anti-loosening pedicle screw-rod system, which belongs to the technical field of implants in the human body of medical instruments. Background technique [0002] The spine is the main load-bearing structure of the human body. It has a complex structure and has the functions of bearing weight, maintaining body balance, exercising, and protecting the spinal cord and internal organs. It plays an extremely important role in normal physiological activities of the human body. Severe fractures of the spine or lesions such as spinal tumors often require spinal reconstruction surgery to stabilize the spine and maintain daily physiological activities or weight bearing. At present, there are many surgical methods used in spinal reconstruction, but the strongest internal fixation method is generally pedicle screw-rod system internal fixation. The existing pedicle screw rod system consists of a fixation rod, a bone screw, a locking head...

Claims

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Application Information

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IPC IPC(8): A61B17/70A61B17/86
CPCA61B17/7002A61B17/7064A61B17/7074A61B17/861A61B2017/564
Inventor 李照文
Owner 李照文
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