Korean J Dent Mater.
2018 Dec;45(4):243-256. 10.14815/kjdm.2018.45.4.243.
Effects of conditions for anodization and cyclic precalcification treatments on surface characteristics and bioactivity
- Affiliations
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- 1Department of Dental Biomaterials, School of Dentistry, Chonbuk National University, Korea. bts@jbnu.ac.kr
- 2Department of Orthodontics, School of Dentistry, Chonbuk National University, Korea.
- 3Department of Dental Technology, Gwangyang Health College,Korea.
- 4Department of Family Medicine, College of Medicine, WonKwang University, Korea.
- KMID: 2432009
- DOI: http://doi.org/10.14815/kjdm.2018.45.4.243
Abstract
- The purpose of this study was to investigate the effects of the anodization and cyclic calcification treatment on the surface characteristic and bioactivity of the titanium thin sheet in order to obtain basic data for the production of bioactive titanium membrane. A 30×20×0.08 mm titanium sheets were prepared, and then they were pickled for 10 seconds in the solution which was mixed with HNO₃: HF: H₂O in a ratio of 12: 7: 81. The TiO₂ nanotube layer was formed to increase the specific surface area of the titanium, and then the cyclic calcification treatment was performed to induce precipitation of hydroxiapatite by improvement of the bioactivity. The corrosion resistance test, wettability test and immersion test in simulated body solution were conducted to investigate the effect of these surface treatments. The nanotubes formed by the anodization treatment have a dense structure in which small diameter tubes are formed between relatively large diameter tubes, and their inside was hollow and the outer walls were coupled to each other. The hydroxyapatite precipitates were well combined on the nanotubes by the penetration into the nanotube layer by successive cyclic calcification treatment, and the precipitation of hydroxyapatite tended to increase proportionally after immersion in simulated body solution as the number of cycles increased. In conclusion, it was confirmed that induction of precipitation of hydroxyapatite by cyclic calcification treatment after forming the nanotube TiO₂ nanotube layer on the surface of the titanium membrane can contribute to improvement of bioactivity.
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