Improving the stability and bioactivity of micro-arc oxidized calcium phosphate/titania porous coatings by high energy shot peening pretreatment
Improving the stability and bioactivity of micro-arc oxidized calcium phosphate/titania porous coatings by high energy shot peening pretreatment
复制标题
高能喷丸预处理提高微弧氧化磷酸钙/二氧化钛多孔涂层的稳定性和生物活性
DOI：
10.1016/j.ceramint.2019.09.183
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发表时间：
2020-02-01
影响因子：
5.2
通讯作者：
Deng, Zhennan
中科院分区：
文献类型：
--
作者：
Shen, Xinkun;Ping, Linchao;Deng, Zhennan
微弧氧化是牙科钛基材料表面改性的常用方法之一。然而，在微弧氧化过程中，表面多孔二氧化钛（TiO 2）涂层容易产生微裂纹，影响涂层的稳定性和种植体的长期使用寿命。本文采用高能喷丸（HESP）预处理方法，提高微弧氧化涂层的稳定性和生物活性，增加钙磷元素在表面的有效掺杂。实验结果表明，经HESP预处理的微弧氧化试样具有较大的孔径（类似于4.0 μ m），涂层厚度（类似于8.5 μ m）和临界载荷（类似于11.1 N）（单胺氧化酶，与3.1 μ m，6.2 μ m，6.2N相似）;（Ca：接近6.3wt%; P：接近9.4wt%）高于MAO组（Ca：接近5.8wt%; P：接近6.7wt%）。与Ti组和MAO组相比，S-MAO组的MC 3 T3-E1细胞的铺展性、存活率、ALP活性及成骨基因表达均较好。所有上述结果表明，HESP预处理具有良好的潜力，以提高涂层的稳定性和生物活性的单胺氧化处理基板。
Micro-arc oxidation (MAO) is one of the conventional methods for surface modification of titanium (Ti)-based dental materials. However, in the process of MAO, the surface porous titania (TiO2) coating is prone to microcrack, which affects the stability of coating and the long-term service life of the implant. In this work, high-energy shot peening (HESP) pretreatment would be used to improve the stability and bioactivity of the MAO coatings and increase the effective doping of calcium and phosphorus (Ca & P) elements in surfaces. We verified that the MAO specimens pretreated by HESP (S-MAO) had larger pore size (similar to 4.0 mu m), coating thickness (similar to 8.5 mu m) and critical load (similar to 11.1 N) than the samples without pretreatment (MAO, similar to 3.1 mu m, 6.2 mu m & 6.2 N); and the content of Ca and P in S-MAO group (Ca: similar to 6.3 wt%; P: similar to 9.4 wt%) was higher than that of MAO group (Ca: similar to 5.8 wt%; P: similar to 6.7 wt%. Meanwhile, it was also proved that compared with Ti and MAO groups, MC3T3-E1 cells on S-MAO substrates had better spreading, viability, ALP activity, and osteogenic gene expression. All the above results indicate that the HESP pretreatment has excellent potential to improve the coating stability and bioactivity of MAO-treated substrates.