Object:To evaluate the clinical effect of posterolateral bone graft fusion to pretend the adjacent segment degeneration after lumbar fusion and discuss the indication.

• 目的：评价在轻度退变的邻近节段行单纯后外侧植骨预防腰椎融合术后邻近节段退变的临床疗效，探讨其适应症的选择。