Effect on the spine growth of the immature rabbits at different month-age with posterior spinal fusion (experimental research on crankshaft phenomenon of spine) / 中国矫形外科杂志

[Objective]To explore the effect on spinal growth and devetopment at different month-age of immature rabbits with spinal fusion and fixation;and to explain the mechanism of crankshaft phenomenon after child scoliosis treatment.[Method]Twenty-four 6-weeks-old rabbits and 24 15-weeks-old rabbits were randomly divided into 2 groups.Various lengths of lumbar vertebral region were fused posteriorly and fixed with wires,and the Cobbs angle in the frontal and saglttal planes were measured after the surgery.[Result]The lumbar spine of each group became lordosis with different degree.It was most obvious in the group which were fused in 7 lumbar vertebraes at 6-month-week age.The multiple linear regression outcomes show significance among different month-age,different lengths of fusion region and the Cobbs angle.[Conclusion]In the imature rabbits,if their lumbar vertebrae were posteriorly fixed only may be appeared and getting serious gradually due to the potential growth of anterior spinal column.There has significant correlation among the degree of skelecton immature,fused segment length and spine lordosis.