Posterior atlantoaxial restricted internal fixation device

A technology of vertebral restraint and internal fixator, which is applied in the field of medical equipment, can solve the problems of limited cervical spine rotation function, achieve the effect of reducing body damage, reducing patient pain, and good curative effect

Inactive Publication Date: 2010-12-29
SECOND MILITARY MEDICAL UNIV OF THE PEOPLES LIBERATION ARMY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the improvement of internal fixation technology, its stability has been improved very well, and bone graft fusion has been added. This method can avoid long-term internal fixation of occipital-cervical fusion and preserve the function of the atlanto-occipital joint. It is currently the main method. However, autologous bone grafting is still required for fusion to cause certain trauma, and at the expense of the function of the atlantoaxial joint, the rotation function of the cervical spine is significantly limited after surgery

Method used

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  • Posterior atlantoaxial restricted internal fixation device
  • Posterior atlantoaxial restricted internal fixation device
  • Posterior atlantoaxial restricted internal fixation device

Examples

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Embodiment 1

[0019] Embodiment 1. A kind of posterior atlantoaxial restrictive internal fixator

[0020] The universal screw body 11 of the present invention has a length of 24 mm, an outer diameter of 3.5 mm, an inner diameter of the cap 12 of 6.0 mm, and a nut 13 matching it. The atlas connecting rod 2 is 55mm long, the middle section 21 has a diameter of 4.0mm and a length of 15mm, and the left and right sections 22 have a diameter of 3.0mm and a length of 20mm. The middle section 31 of the pivot connecting rod 3 is 10mm long, the cross section is square, and the side length is 4.0mm, and the left and right section 32 cylinders have a diameter of 3.0mm and a length of 30mm. The circle diameter of universal fixed rod 4 head 41 sides is 12mm, and the diameter of universal joint cylindrical hollow channel 413 is 4.2mm, and the frontal width of body 42 is 10mm, and side width is 8mm, and the length of square columnar hollow channel 421, Width and height match the middle section 31 of the p...

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Abstract

The invention relates to the technical field of medical machinery, and provides a posterior atlantoaxial restricted internal fixation device for bone surgery. The device comprises four universal screws (1) for pediculus arcus vertebrae, an atlas connecting rod (2), an epistropheus connecting rod (3) and universal fixed links (4), wherein the universal screws for pediculus arcus vertebrae are respectively fixed on left and right ends of the atlas connecting rod (2) and the epistropheus connecting rod (3); the universal fixed links (4) are connected with the atlas connecting rod (2) and the epistropheus connecting rod (3) into a whole respectively through a cylindrical hollow channel (413) on the head part (41) and a square column hollow channel (421) on the body part (42). The device has simple structure and convenient use, reserves the function of the atlas joint as the atlas and the epistropheus are only connected and fixed, and achieves the aim of resetting and maintains normal physiological functions of the atlantoaxial as the universal fixed link restricts flexion and extension of the atlantoaxial.

Description

technical field [0001] The invention relates to the technical field of medical instruments, and relates to a posterior atlantoaxial restrictive internal fixator for orthopedic surgery. Background technique [0002] The atlas and axis are special vertebral segments in the cervical spine, and they are also important components of the occipital atlantoaxial complex. The atlantoaxial joint can perform axial rotation in a large range with the odontoid process as the axis, accounting for the entire cervical spine rotation. More than half of the range of motion, its rotational function is very important to the human body. However, the atlantoaxial and axial vertebrae are also prone to mechanical injuries, congenital deformities, tumors, tuberculosis, and rheumatoid diseases. The resulting instability of the atlantoaxial vertebrae and spinal cord compression is an important aspect of spinal surgery. [0003] Posterior fusion is the main method to solve the instability of the atlant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/70
Inventor 倪斌周风金
Owner SECOND MILITARY MEDICAL UNIV OF THE PEOPLES LIBERATION ARMY
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