Improving the long-term stability of Ti6Al4V abutment screw by coating micro/nano-crystalline diamond films.
Improving the long-term stability of Ti6Al4V abutment screw by coating micro/nano-crystalline diamond films.
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DOI：
10.1016/j.jmbbm.2016.06.018
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发表时间：
2016-10
影响因子：
3.9
通讯作者：
Youneng Xie;Jing Zhou;Qiu-ping Wei;Zhiming Yu;Hao Luo;Bo Zhou;Zhangui Tang
中科院分区：
文献类型：
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作者：
Youneng Xie;Jing Zhou;Qiu-ping Wei;Zhiming Yu;Hao Luo;Bo Zhou;Zhangui Tang
Abutment screw loosening is the most common complication of implanting teeth. Aimed at improving the long-term stability of them, well-adherent and homogeneous micro-crystalline diamond (MCD) and nano-crystalline diamond (NCD) were deposited on DIO®(Dong Seo, Korea) abutment screws using a hot filament chemical vapor deposition (HFCVD) system. Compared with bare DIO®screws, diamond coated ones showed higher post reverse toque values than the bare ones (p<0.05) after cyclic loading one million times under 100 N, and no obvious flaking happened after loading test. Diamond coated disks showed lower friction coefficients of 0.15 and 0.18 in artificial saliva when countered with ZrO2than that of bare Ti6Al4V disks of 0.40. Though higher cell apoptosis rate was observed on film coated disks, but no significant difference between MCD group and NCD group. And the cytotoxicity of diamond films was acceptable for the fact that the cell viability of them was still higher than 70% after cultured for 72 h. It can be inferred that coating diamond films might be a promising modification method for Ti6Al4 V abutment screws.
