第三代丝蛋白的机械性能比较,用于骨合成固定系统
Iulianna C Taritsa1, Yushu Wang2, Reddhy Mahle2
1Division of Plastic Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
概括
与金属和可再吸收系统相比,热加工的丝板在骨固定方面具有优越的机械性能. 补水控制进一步改进了丝骨固定硬件,以提高性能.
科学领域:
- 生物材料科学 生物材料科学
- 整形外科手术 整形外科手术
- 材料工程 材料工程 材料工程
背景情况:
- 骨质合成系统对于瘤,创伤和骨格内科手术中的骨重建至关重要.
- 丝蛋白生物材料为传统金属固定提供了一种新的替代方案,可提供生物降解性,生物相容性和减少应力屏蔽.
- 这项研究研究了三代基于丝的骨固定硬件的机械性能.
研究的目的:
- 评估和比较基于丝的新型骨固定系统的机械性能.
- 评估不同制造方法 (基于HFIP,水性衍生,热成型) 对丝硬件性能的影响.
- 将基于丝的系统与传统的金属和可再吸收的固定装置进行比较.
主要方法:
- 丝板和螺丝是使用基于六二醇 (HFIP),水性衍生和热成型方法制造的.
- 热成型丝使用无形丝纳米材料 (ASN) 在高压下化.
- 机械测试包括三点曲,拉力,压缩和双圈剪切测试.
主要成果:
- 干热加工的丝板表现出优越的屈曲模量 (2.47.8 GPa) 与HFIP衍生 (1.74.4 GPa) 和水性衍生 (2.7 GPa) 板相比.
- 水合热丝板表现出优异的抗拉性 (0.910.5 MJ·m-3),明显超过当前可再吸收材料 (0.15 MJ·m-3).
- 丝散装材料实现了接近皮质骨的机械耐受性,与匹配的弹性模块相匹配,最大限度地降低了应力屏蔽.
结论:
- 热加工的丝是一种非常有前途的生物材料,用于骨固化,性能优于金属和可再吸收系统,以及早期的丝代.
- 丝的水分状态显著影响其机械性能,使其能够针对特定应用进行量身定制的性能.
- 基于丝的骨固定系统代表了骨固定技术的可行进步.
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