【摘要】 钛(Ti)及其合金由于其良好的生物力学性能和生物化学性能,已经成为高负荷骨骼较好的替代材料。可是钛合金与骨组织弹性模量不匹配,容易造成应力屏蔽。而羟基磷灰石(HA)是自然骨无机质的主要成分,具有良好的生物活性和生物相容性,但是却因强度低、脆性大,不能用在承载部位而限制了应用。在Ti/HA复合材料的制备方法和基本性能研究现状基础上,从纳米相增强和稀土掺杂等方面综述了Ti/HA复合材料的发展现状。更多还原

【Abstract】 Titanium(Ti)and its alloys have become the preferable high-load bone substitute materials and successfully been used in medical implants due to their good biomechanical and biochemical properties.However,the elastic modulus of Ti and its alloys are not matched with bones tissue and may result in so called " stress-shielding".Hydroxyapatite(HA)is the main ingredient of natural bone mineral substance,so that it has excellent bioactivity and biocompatibility.But its application is limited because of the low strength,brittleness,and worse load-carrying capacity.Based on researches of preparation and the fundamental property of Ti-HA composites,present progress of Ti-HA composites reinforced by various nano-materials and doped by rare earth element were summarized.更多还原