Non-fusion lumbar vertebra fixing device

Abstract

The invention provides a non-fusion lumbar vertebra fixing device, relates to an internal fixing device for the department of orthopaedics, and particularly relates to the non-fusion lumbar vertebra fixing device. The non-fusion lumbar vertebra fixing device comprises an elastic connecting bar and lumbar vertebra facet joint cortical screws arranged on the two ends of the elastic connecting bar. According to the technical scheme, the defects existing in the prior art are effectively solved. The non-fusion lumbar vertebra fixing device is small in operation trauma, short in operation time, convenient in operation, low in learning cost, small in complication, high in practicability, good in effect, and is suitable for large-scale application and popularization.

Description

technical field [0001] The invention relates to an internal fixation device for orthopedics, in particular to a non-fusion lumbar spine fixation device. Background technique [0002] The trend of aging is a severe reality that mainland China will soon face, and big cities such as Shanghai have taken the lead in entering the aging society. Degenerative spinal disease is a common and frequently-occurring disease among the elderly. Lumbar instability and lumbar spinal stenosis caused by lumbar disc degeneration often become one of the main factors that seriously affect the quality of life of patients and increase the burden on families and society. [0003] Degenerative lumbar spinal stenosis is caused by herniation of the intervertebral disc and the loosening and instability of the vertebral joints, resulting in secondary facet joint hyperplasia and hypertrophy of the ligamentum flavum. Causes narrowing of the neural tube, resulting in symptoms of nerve compression. The typi...

AI Technical Summary

Problems solved by technology

However, the hole mirror technology cannot solve the following problems: 1. Multiple perspectives during the operation, the radiation exposure of medical staff and patients is inevitable, and the cost of the operating system is expensive; 2. The operation cannot solve the stability of the patient and cannot relieve low back pain; 3. 1. The transforaminal mirror is operated in a water bath environment, and deep infection and nerve edema are also one of the disadvantages; 4. The learning curve for medical staff is relatively long

Some elderly patients can tolerate this surgery, but its inherent disadvantages: 1. Multiple incisions on both sides are required; 2. The adjacent vertebral disease caused by the fusion of the vertebrae still cannot be overcome, and the pedicle screws may also loosen in patients with osteoporosis

However, the satisfaction rate in practical application is low, mainly because most patients have different degrees of osteoporosis, and the spinous process itself has low mechanical load capacity.

The space structure between the spinous processes is irregular, and individual differences are large, resulting in extremely uncertain long-term efficacy of dynamic fixation between the lamina and the spinous processes

Although the design of the pedicle screw and micro-movement rod used in the above technology as a fixation device can partially retain the function of the vertebral segment, it also has the following disadvantages: 1. Because the nut at the end of the pedicle screw is far away from the instantaneous rotation center of the vertebral segment Farther away, the actual mobility of the postoperative vertebral segment is small, and most of the rotation function is almost lost; 2. The pedicle screw technique requires extensive stripping of the paraspinal muscles, and the surgical trauma is large

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