目的：研究深低温冷冻法储骨时间与皮质骨生物力学特性的关系。方法：用深低温冷冻法储存的腓骨皮质作标本，分别将储存１年和７年的腓骨皮质做成弯曲及压缩试件，在Ｉｎｓｔｒｏｎ １１９５型电子拉伸试验机上测试两组的极限弯曲强度，弹性模量及极限压缩强度，所得数据进行组间ｔ检验。结果：１年组和７年组的极限弯曲强度差异不明显（Ｐ＞０．０５），弹性模量差异不明显（Ｐ＞０．０５），极限压缩强度差异不明显（Ｐ＞０．０５）。结论：深低温冷冻法储骨，皮质骨的生物力学特性受储存时间长短影响不显著。只要确保无污染，储存骨的使用不应受储存时间长短的影响，术中术后处理亦不应受影响。

Objective: To study the relationship between the preservating time of deep frozen cryopreservating allograft and the biomechanical properties. Method: Specimens of the fibular bones of deep frozen cryopreservation for 1 and 7 years were made into test pieces of torture and compaction.And the bending strength(BS) ,modulus of elasticity(ME) and compact strength(CS) were measured on the INSTRON1195 electronic tensile test machine.And the results were analysised with T test. Results:The 1 year group and the 7 year group had no significant difference in trems of BS(P>0.05) ,ME(P>0.05) and CS(P>0.05). Conclusion: Cryopreservation had no effects on the cortical bone biomechanics ,as long as not contaminated, the cryopreservation will be independent of storage time and the pre- or pro- operation treatments.