摘要
分别利用微弧氧化(MAO)和喷砂酸蚀(SLA)技术对纯钛表面进行预处理,再经碱热处理后置于模拟体液中培养,以对其生物活性予以评价。结果表明:经微弧氧化处理后的膜层主要由锐钛矿型的TiO2构成,其表面孔径均匀,孔隙率达到12%,而喷砂酸蚀处理后的表面更为粗糙,成分也较为复杂;经碱热处理的试样均表现出较好的亲水性;碱热处理后的试样置于模拟体液中培养14天后,表面均被生长出的类骨磷灰石完全覆盖,证明其具有良好的生物活性,且生长出的缺钙型磷灰石与人体自然骨成分相似,两种预处理方式对陶瓷层生物活性的影响差异不大。
The ceramic layers were prepared on pure titanium substrate by MAO（micro-arc oxidation） and SLA（sandblasting with large grit followed by acid etching）pretreatment respectively,and then the ceramic layers after alkali-heat treatment were trained in SBF（simulated body fluid） for their bioactivity evaluation.The results showed that：The MAO ceramic coating was mainly composed of anatase TiO2,and the porosity of the coating which with uniform porous structure reached 12％,while the SLA surface was more rough and its composition was also more complex; As a result of the wetting angles with SBF,the ceramic layers treated by alkali-heat method showed good hydrophilic ;The ceramic layers treated by alkali-heat method were completely covered by bone-like apatite when they were cultured in SBF for 14 days,and the calcium deficiency apatite grew on the coating which with perfect bioactivity was similar to the human bone in composition,but both of the pretreatments had insignificant influence on the bioactivity of the ceramic layers.
出处
《沈阳理工大学学报》
CAS
2014年第4期14-20,33,共8页
Journal of Shenyang Ligong University
基金
沈阳市科技计划项目(F12268400)
关键词
微弧氧化
喷砂酸蚀
碱热处理
纯钛
生物活性
micro-arc oxidation
sandblast and acid-etching
alkali-heat treatment
pure titanium
bioactivity
