Abstract
The merits of fixation on lumbar surgery are widely known. Tight fixations may cause disorder of the adjoining disc after along interval. Solutions such as the Graf system were developed to cossect such problems: as its purpose is to stabilize intervertabral fixed joints. We performed unilateral posterolateral fusion on the lumbar spine for stabilization. In this paper, we report the clinical and radiographical results of postoperative surgery.36 patients (10 men, 26 women) with an average age of 45 years (range: 24 to 70) underwent unilateral postlateral fusion from June 1996 to April 2000. The average follow-up time was 15 months. We evaluated clinical symptoms using the JOA score, and determined the recovery rate by Hirabayashi's method. We also evaluated bone union, and range of motion of fixed intervertebral joint.The mean JOA score was 12.7 before operation, and 26 postoperatively. The mean recovery rate was 84.9%. The rate of bone union was 83.6%. The instability of the intevetebral fixed joint undergoing surgery improved from 6.5 degrees preoperatively to 4.5 degrees postoperatively.We started to obtain good results from the middle term. Unilateral lumbar posterolateral fusion is effective for stabilization. We consider unilateral posterolateral fusion to be an effective option when other cossective produses are doubtful.
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