摘要
取20具成人尸体腰段脊柱,模拟最严重前中柱损伤模型,通过测定加载方向应变和位移或角度值,比较短节段Roy—Camille、Steffee、Dick、C—D和TPRF5种椎弓根内固定系统在轴向压缩、侧弯、前屈和扭转试验的生物力学稳定性。实验结果表明:器械的稳定程度与椎弓根螺钉直径、螺钉固定装置等结构密切相关。本实验条件下,以TPRF的稳定性最好,但各种器械均不能完全恢复正常脊柱的稳定性。
Twenty cadaveric lumbar spines were harvested to imitate the severe injury of anterior two column instability. Biomechanical testings of stability were performed in axial compression,laterial-bending,flexion and rotation by recording strain and displacement or angle on the loading side to compare five short segment pedicle screw internal fixation systems:Roy-Camille.Stef fee, Dick, C-D and TPRF.The results showed the stability of instrumentation correlating with structure,such as the diameter of pedicle screws, the fixing device of screws and so on- Under conditions of this experiment,the stability of TPRF is the best,but each one can not restore normal stability of spine.
出处
《骨与关节损伤杂志》
1994年第4期240-243,共4页
The Journal of Bone and Joint Injury
