金属碎片的释放通常是从扩张的全脚置换中看到的
Shona Haston1, David Langton2, David Townshend3
1School of Engineering, Merz Court, Newcastle University, Newcastle Upon Tyne, NE1 7RU, UK; ExplantLab, The Biosphere, Draymans Way, Newcastle Helix, Newcastle Upon Tyne, NE4 5BX, UK.
概括
金属碎片的释放在全脚置换中很常见,在大多数组件上都会发现刺穿和划伤. 这些颗粒碎片可能导致植入物失效,需要进一步调查.
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
- 磨损分析 磨损分析
背景情况:
- 全关节置换 (TAR) 失败可能与磨损碎片有关.
- 了解解释TAR的损伤机制对于改善植入物设计和寿命至关重要.
研究的目的:
- 描述当代全脚置换器件金属部件的损伤机制.
- 为了调查在开挖的TAR中磨损和碎片的流行程度和类型.
主要方法:
- 分析了27个已解释的全脚置换 (8个设计).
- 利用显微镜,非接触型度测量和扫描电子显微镜与能量分散式X射线光谱学.
- 检查了关节和非关节表面,以及聚乙烯插件.
主要成果:
- 穿孔和划痕是最常见的磨损特征.
- 在52%的部和95%的部件上观察到金属孔,在-合金上比合金更为普遍.
- 由于挖孔,表面粗度发生了显著的变化;痕表明,在78%的塔拉尔组件上存在第三体颗粒.
- 在80%的金属元件上有涂层降解;在19%的聚乙烯插件中发现嵌入式金属碎片.
结论:
- 翻开的全脚置换经常会从关节表面和涂层中释放金属碎片.
- 金属颗粒碎片的释放可能比以前认为的更为常见.
- 金属碎片应该被认为是导致关节整体关节整形失败的原因之一.
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