An adjustable thoracolumbar anterior zero-tangential interface type support fixation fusion device

Abstract

The invention relates to an adjustable interface type supporting and fixing fusion device achieving zero incisure of the anterior thoracolumbar spine. The device comprises a connecting sleeve and two fusion components. A left-hand internal thread is arranged at one end of the connecting sleeve, a right-hand internal thread is arranged at the other end of the connecting sleeve, an external thread matched with the left-hand internal thread is arranged at one end of one fusion component, and an external thread matched with the right-hand internal thread is arranged at one end of the other fusion component. Each fusion component comprises a fusion portion and a connecting portion axially connected with the fusion portion. The external threads are arranged on the connecting portions, and the outer end faces of the fusion portions are of a net porous structure. The fusion components at the two ends are drawn close to the middle or opened towards two sides by rotating the connecting sleeve, and therefore the length of the fusion device is adjusted, placing in and taking out are facilitated, and high applicability is achieved. According to the fusion device, adjustment, opening supporting, fusion and zero-incisure fixing are integrated into one system, operation is easy, and use is convenient.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an adjustable thoracolumbar anterior approach zero-tangential interface support fixation fusion device. Background technique [0002] The previous titanium cage and artificial vertebral body did not have the concept of interfacial fusion, nor did they have the function of fixation. Other anterior thoracolumbar fixation devices in the past only had the function of fixation. They should be used in combination with titanium cages and artificial vertebral bodies, and there is no One is zero notch, and needs to expose the vertebral body in the adjacent stage, damage the periosteum (the periosteum is the tissue that nourishes the bone), ligate the blood vessels, affect the blood supply of the bone, eventually affect the growth and healing of the bone, and also affect the blood supply of the spinal cord. Increased risk of neurological impairment and paralysis in patients. [00...

AI Technical Summary

Problems solved by technology

[0002] The previous titanium cage and artificial vertebral body did not have the concept of interfacial fusion, nor did they have the function of fixation. Other anterior thoracolumbar fixation devices in the past only had the function of fixation. They should be used in combination with titanium cages and artificial vertebral bodies, and there is no One is zero notch, and needs to expose the vertebral body in the adjacent stage, damage the periosteum (the periosteum is the tissue that nourishes the bone), ligate the blood vessels, affect the blood supply of the bone, eventually affect the growth and healing of the bone, and also affect the blood supply of the spinal cord. Increased risk of neurological impairment and paralysis in patients

[0003] In addition, the traditional titanium cage cannot be adjusted or stretched, and requires additional instrumentation (such as plate fixation), and the bilateral bone must grow up to 6 cm before it can heal; and the artificial vertebral body also needs to grow up to about 6 cm before the bone fusion can be imagined. However, it is known how long and difficult it is for the bone to crawl and grow 6cm, and because of the plate fixation, the bone growth will be more difficult after the blood supply of the vertebral body in the adjacent stage is damaged.

Images