记忆加压接骨器用于肱骨骨折时环抱支压力的估算与实验

目的通过理论计算与实验测定记忆加压接骨器固定于肱骨时环保支提供的应力环境，为接骨器的进一步改进以及肱骨的受力分析奠定基础。方法采用生物力学中的莫尔定理首先估算环保支的压力范围，然后选用压敏胶片进行实验测定。结果计算结果显示环保支发生最大形变时提供的作用力为24N，与实验测定的最大压力22．68N十分接近。结论压敏胶片对于压力敏感，可以根据颜色的变化判断压力水平，容易操作，且不影响接骨器固定于肱骨后环保支的变形，这就保证了实验的准确性。理论计算与实验结果基本一致，计算与实验均具有一定的可靠性。

PRESSURE CALCULATION AND EXPERIMENT OF MEMORY-COMPRESSIVE-CONNECTOR APPLIED TO CATAGMATIC HUMERUS

Objective In this study the force were estimated through numerical calculation and experiment measurement while the connector was well fixed to the humerus. The results can be applied for the optimization of the memory-compressive-connector and the stress analysis. Methods The Mohr Theory was applied to calculate the pressure range between connectors and humerus. The selective prescale pressure sensitive film was then applied to measure the contact pressure in the experiment. Results The calculation showed that the force was 24N when the strain reached maximum. The maximum value was 22.68N in the experiment measurement. So the calculation result was close to the experimental value. Conclusion The prescale sensitive film is sensitive enough to measure the contact pressure. The loads can be confirmed according to the level of the colors. It is convenient for operations to apply the prescale sensitive film. The value through calculation is close to the experimental result. This demonstrated that the calculation and experiment procedures are applicable.