生物惰性材料

Al2O3陶瓷是一种生物惰性材料，硬度高，熔点高，化学稳定性好，具有比较高的机械强度和耐磨损性能及化学稳定性，但脆性较大。

Alumina ceramic is a very important inert bio-ceramic material , which possesses high hardness , high melting point , good chemical stability , good mechanical properties and wear-resisting property . Its limitation is brittleness .

但是，C/C属于生物惰性材料，未经处理的C/C表面具有疏水性，长期置于人体中，脱落的游离碳会随体液流动，沉积到表面皮肤，造成黑肤效应。

However , C / C composites are bio-inert ; the surface of C / C composites without any treatment is hydrophobic . The dissociative carbon can flow with body fluids and thus cause " black skin effect " due to the carbon deposition within the skin .

虽然钛及其合金具有良好的生物相容性和力学性能，但钛及其合金属于生物惰性材料，几乎不具有生物活性。

Although Ti and its alloy has excellent mechanical properties , they belong to biological implanting material , there is little bio activity .