Some morphological features of lumbar spine in normal people in the regular X-ray image

291 healthy youths with ages of 17-30, without internal disease and osteoarthropathy and congenital osteoarthological defects were monitored the age, gender, height, weight of vertebrae in the lumbar and lumbosacral region. The results showed that the rate of vertebral double spine was significant higher than this of other defects. The wide of vertebrae was increasingly from L1 to L5 (average of 4.5+/-0.5cm). The height of vertebrae was 3.1+/-0.3cm. The average thickness of intervertebral disks was 1.3+/-0.3cm. The average concavity index was 2.2+/-0.3mm. Flat-flat angle in the lumbosacral spine was 17.1+/-3.9o. The open angle in the lumbar spine was 31+/-7.4o