在聚氨泡块中进行脚螺丝拉出测试:块方向和密度的影响
Stephen Bennie1, James Douglas Crowley1, Tian Wang1
1Surgical & Orthopaedic Research Laboratories (SORL), Prince of Wales Clinical School, UNSW Sydney, Sydney, NSW, Australia.
概括
聚氨 (PU) 泡的异质性会影响骨科植入物测试. 较低密度的PU泡显示了基于方向的螺丝拉出强度的显著差异,建议在实验中保持一致的块方向.
科学领域:
- 生物材料科学 生物材料科学
- 整形医学生物力学 整形生物力学
- 材料测试 材料测试 材料测试
背景情况:
- 聚氨 (PU) 泡是骨科植入物测试中尸骨骨的常见替代品.
- 泡对螺丝拉出测试的PU泡异性质的影响尚未得到充分研究.
- 了解材料异质性对于可靠的生物力学测试至关重要.
研究的目的:
- 为了研究PU泡异构性对压力和螺丝拉出性能的影响.
- 评估不同泡密度 (PCF10,PCF20,PCF40) 和方向 (X,Y,Z) 如何影响机械性能.
- 为骨科植入物测试中标准化PU泡使用提供建议.
主要方法:
- 在三种密度的PU泡 (0.16,0.32,0.64g/cm3) 上进行了压缩和螺丝拉出试验.
- 测试了X,Y和Z方向的泡样本,以评估异构性.
- 使用ANOVA分析了最大的压力,刚性,应力,模量,拉出力,能量到故障和刚性.
主要成果:
- 压缩性质在PCF 20泡中显示出明显的取决于方向的差异.
- 最大拉出力受到PCF 10泡中方向的显著影响.
- 在拉出测试的高密度泡 (PCF 40) 中没有观察到显著的定向效应.
结论:
- 聚烯泡的异构性可以显著影响螺丝拉出测试结果,特别是在密度较低的泡中.
- 建议对PU泡块进行一致的定向,以获得可重现的实验结果.
- 需要标准化测试协议,以确保骨科研究中合成骨模型的可靠性.
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