Conclusion One AFC, that was located into either the middle of L 5S 1 interbody space or left lateral obliquely of L 4,5 interbody space, has obtained more significant effect in terms of stability of the specimen models than one pure bonetowel.

• （2）L5S1椎间隙正中放置1枚AFC，L4，5椎间隙左前外斜向放置1枚AFC均明显提高了峡部裂模型标本的稳定性，较同部位单纯植骨有更好的稳定效果。