Postoperative collapse of the intervertebral space:A problem of anterior surgery for cervical spondylosis

patients with cervical spondylotic myelopathy（84 cases）and myeloradiculopathy（28 cases）were operated on via anterior approach（61 CIoward’s,6 Robinson-Smith’S and 45 vertebrectomy）,and fol-lowed up for 14 monthes to 9 years.repeat X-ray films were taken in all patients,myelographing in 3,CT scan in 8 and MR in 7 cases.We found that the collapsing rate of the operated intervertebral space was 42%（47 cases）,and the postoperative conditions were deteriorated in 41 cases（36.6%）.According to the results of reexamination,we consider the collapse of the operated intervertebral space is one of the reasons of poorsurgical results of recurrence.