Lumbar spine cartilage plate rupture1 Mechanism of occurrence: Lumbar spine cartilage plate rupture is a more specific type of lumbar disc herniation. It is due to the instability of the posterior lumbar joint when various stresses suddenly act on the lower back. It causes partial tearing of the cartilage plate at the posterior end of the vertebral body. The symptoms of acute posterior joint injury are present. Acute low back pain occurs. Lumbar muscle spasm. One or both sides of the posterior joint pressure pain, etc.. If there is sufficient bed rest to give the torn cartilage plate and bone edge a chance to repair. Secondary lumbar disc herniation is avoided. If the injury is repeated within a short period of time. The torn cartilage plate is not healed. At the same time, the trauma causes local stress imbalance in the annulus fibrosus causing degeneration of the entire disc. This causes the unrestrained annulus fibrosus and nucleus pulposus to move backward. The torn cartilage plate is forced to protrude into the spinal canal. The corresponding compression symptoms on the dura and nerve roots appear. At the same time, local hemorrhage leads to ossification of the posterior inferior border of the vertebral body. The ruptured and displaced cartilage plate is allowed to heal with the bone edge. It is most common at the lower edge of the 4th lumbar vertebra. It is followed by the lower edge of the 5th lumbar vertebra and the lower edge of the 3rd lumbar vertebra. Therefore. Since the compression of the dural sac and nerve roots is mainly hard cartilage tissue. In addition, there is a herniated nucleus pulposus stenosis and the stimulation of cartilage tissue secretions and nucleus pulposus tissue. The lumbar pain and corresponding scoliosis can occur, and the corresponding nerve roots can be stimulated to produce severe radiating pain. 2 Clinical characteristics of lumbar cartilage plate rupture has the following characteristics 1) it is common in young adults; 2) there is a clear history of serious trauma to the lumbar region. There is a history of bending and lifting objects, falls and sprains; (3) pain manifests as dull and swelling pain in the lumbosacral region. There is also abnormal stiffness of the lumbar region and the gradual development of lower limb pain and numbness; (4) physical signs of the lumbar spine show posterior spine protrusion or scoliosis. There is also a positive straight leg raise test of 5°-30°. Weakness of the extensor muscles; (5) ineffective or even aggravated by conservative treatment 3 Imaging features (1) X-ray shows a small degree of narrowing of the vertebral space, even in the posterior edge of the vertebral body can be seen with a triangular lip-shaped bone block protruding into the spinal canal. (2) CT examination shows: the posterior edge of the vertebral body is crescentic or small regular defect of the same depth, corresponding to the anterior part of the vertebral canal with arcing teeth or broken bone compressing the dural sac; the posterior edge of the vertebral body is round-like bursal change bulging backward. 4 Diagnosis and treatment of patients with lumbar spinal cartilage plate rupture disorder are clinically characterized by lumbar stiffness. Severe posterior spinal protrusion or scoliosis pain. Severe radiating pain in the affected limb. And there are signs and symptoms of a positive straight leg raise test. It is also more common in young people. The above clinical and imaging manifestations can make a clear diagnosis, especially when the CT shows two adjacent layers and the posterior edge of the vertebral body is defective corresponding to the anterior free and defective coincidence in the spinal capsule. Conservative treatment is generally not advisable after detection. In particular, traction therapy should be selected for surgical treatment after the diagnosis is clear. These patients are mostly seen in young people, and the surgical treatment should take into account the long-term outcome, so the best surgical procedure or discoscopic surgery is the laminar opening. The central type can be treated with bilateral interlaminar openings, and the lateral saphenous fossa should be probed for stenosis, with particular attention to avoiding the use of resection of small joints or partial resection of small joints in order to relieve nerve root and dural compression and maintain lumbar stability so as to relieve symptoms and signs. The purpose of near and long-term treatment should be achieved.