Objective: To discuss the mechanism how the sacrum fracture happens under the dynamics clashing load.
目的：探讨骶骨在冲击载荷作用下发生骨折的机理。
The plastic limit analysis is applied to the unstable fracture load.
对失稳断裂载荷进行了塑性极限分析。
Two types of load were applied to investigate the change of tooth fracture resistance after restored with MOD inlay.
目的：对直接树脂和间接树脂嵌体修复后牙体的抗力进行三维有限元研究。
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