距骨和跟骨的压应力实验研究

本文对正常人体不规则骨—距骨和跟骨进行了压应力实验研究,给出距骨、跟骨的破坏载荷与强度极限,并对其损伤机制进行分析。实验结果不仅有助于阐明距骨和跟骨的生物力学性能,而且能够满意地解释临床上所见到的距骨和跟骨骨折,以及骨折与几何学形状之间的关系。

Experimental Study of Compressive Stress on Talus and Calcaneus in Normal Chinese Adult

Talus and calcaneus are the irregular bones that act mainly as bearing the weight of body. Experimental study of compressive tress was performed on 10 tali and 10 calcanci taken from fresh cadavers after sudden death of the injureds in April 1988. The results showed that strength limit of talus was from 0.931 KN/cm~2 to 2. 318KN/cm~2, with an averaged of 1. 5746KN/cm~2; strength limit of calcaneus was from 0.273KN/cm~2 to 1.252KN/cm~2, with an averaged of 0.5307KN/cm~2. The type of fracture in talus differed greatly from that of the calcaneus because of geometric features of these two specimens. Under the compressive stress, talus showed a vertical fracture and calcaneus a compressive fracture with a few comminutes. The results would aid to not only explain the biomechanics properties of talus and calcaneus, but also clarify the differed type of fracture in talus and calcaneus and the relation between the fracture and geometric fentures. By given the damage load and strength limit of talus and calcaneus after test, the scientific basis was provided for movement protection and artificial prosthesis.