研究了电化学抛光时间（60、180s）对常规和超细晶TiNi合金表面形貌与生物活性的影响。结果表明，电化学抛光时间从60s增加到180s时，常规Ti—Ni合金表面纳米尺度蚀坑数量增多，但仅轻微提高了其生物活性（模拟体液中Ca—P层的生长速率），而超细晶TiNi合金表面纳米蚀坑数量大幅减少，生物活性虽大幅降低，但仍显著高于常规TiNi合金。结果表明，除了增加纳米尺度蚀坑形貌外，组织超细化也是提高生物活性的一个有效方法。
The effect of electrochemical polishing time (60, 180s) on the surface morphology and bioactivity of conventional TiNi and ultrafine-grained TiNi alloy were investigated. The results showed that with the increase of electrochemical polishing time from 60 to 180s, the conventional TiNi alloy exhibited much higher density of nano-scale corrosion pits but only a sligher higher bioactivity (growth rate of Ca-P layer in simulated body fluid), while the ultrafine-grained TiNi alloy exhibited much lower density of nano-scale corrosion pits and a much lower bioactivity but was higher than that of conventional TiNi alloy. The present results illustruate that besides the nano-scale corrosion pit morphology, the ultrafinement processing of microstructure was an effective approach to improve bioactivity.
参考文献
| [1] | Maehado L G;Savi M A .Medical applications of shape memory alloys[J].Brazilian Journal of Medical Biological Research,2003,36(06):683-691. |
| [2] | Ruslan Valiev;Dmitry Gunderov;Egor Prokofiev;Vladimir Pushin;Yuntian Zhu .Nanostructuring of TiNi Alloy by SPD Processing for Advanced Properties[J].Materials transactions,2008(1):97-101. |
| [3] | Park JW;Kim YJ;Park CH .Enhanced osteoblast response to an equal channel angular pressing-processed pure titanium substrate with microrough surface topography.[J].Acta biomaterialia,2009(8):3272-3280. |
| [4] | Truong VK;Lapovok R;Estrin YS;Rundell S;Wang JY;Fluke CJ;Crawford RJ;Ivanova EP .The influence of nano-scale surface roughness on bacterial adhesion to ultrafine-grained titanium.[J].Biomaterials,2010(13):3674-3683. |
| [5] | Cooper LF .Advancing dental implant surface technology - From micron- to nanotopography.[J].Biomaterials,2008(28):3822-3835. |
| [6] | Venkatsurya, P.K.C.;Thein-Han, W.W.;Misra, R.D.K.;Somani, M.C.;Karjalainen, L.P. .Advancing nanograined/ultrafine-grained structures for metal implant technology: Interplay between grooving of nano/ultrafine grains and cellular response[J].Materials science & engineering, C. Biomimetic and supramolecular systems,2010(7):1050-1059. |
| [7] | Tajima K;Hironaka M;Chen K K et al.Electropolis- hing of CP titanium and its alloys in an alcoholic solution- based electrolyte[J].Dental Materials,2008,27(02):258-265. |
| [8] | Wu W;Liu X J;Han H M et al.Electropolishing of Ni- Ti for Improving Bioeompatibility[J].Journal of Materi- als Science and Technology,2008,24(06):926-930. |
| [9] | C.L. Chu;R.M. Wang;T. Hu;L.H. Yin;Y.P. Pu;P.H. Lin;S.L. Wu;C.Y. Chung;K.W.K. Yeung;Paul K. Chu .Surface structure and biomedical properties of chemically polished and electropolished NiTi shape memory alloys[J].Materials science & engineering, C. Biomimetic and supramolecular systems,2008(8):1430-1434. |
| [10] | Kokubo T;Kushitani H;Sakka S et al.SoLutions able to reproduce in vivo surface-structure changes in bioac- tire glass-ceramic A-W[J].Journal of Biomedical Mate- rials Research,1990,24(06):721-734. |
| [11] | Yu Chunhang;Shao Honghong;Xu Xiaojing et al.Re- search of the growth characteristics and biological activi- ty of TiOz thin films on nano-titanium substrate[J].Journal of Functional Materials,2010,41(05):844-847. |
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