Affiliations: [a] Department of Dentistry, Antai Medical Care Cooperation Antai Tian-Sheng Memorial Hospital, Pingtung, Taiwan | [b] Institute of Oral Science, Chung Shan Medical University, Taichung City 402, Taiwan | [c] Department of Stomatology, Chung Shan Medical University Hospital, Taichung City 402, Taiwan | [d] School of Dentistry, Chung Shan Medical University, Taichung City 402, Taiwan
Correspondence:
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Corresponding author: Shinn-Jyh Ding, Institute of Oral Science, Chung Shan Medical University, Taichung 402, Taiwan. Tel.: +886 4 24718668 ext. 55529; Fax: +886 4 24759065; E-mail: sjding@csmu.edu.tw
Abstract: BACKGROUND:Surface modification of metallic implants is critical for improving the clinical performance of the dental and orthopedic devices. Bioactive glasses exhibit different levels of cellular function and physicochemical behavior; however, there have been few previous studies on the effect of constituents of the bioactive glasses on the in vitro osteogenic activity and corrosion resistance of apatite-based coatings. OBJECTIVE:The objective of this work was to investigate the effect of SiO2, CaO, Na2O, and P2O5 on plasma-sprayed apatite coatings on Ti alloy substrates for tailoring the properties of implants making them suitable for clinical applications. METHODS:The corrosion potential and corrosion current of various coatings in simulated body fluid (SBF) were examined. MG63 cell proliferation, differentiation, and mineralization of plasma-sprayed apatite-matrix coatings were evaluated. RESULTS:The SiO2 and CaO-containing HA (HSC) coating had a higher corrosion potential than the other three coatings, while SiO2-containing HA (HS) coating displayed the highest corrosion current among all coatings. The effect of the oxides on cell functions followed the order SiO2 > CaO > P2O5 > Na2O in terms of cell attachment, proliferation, differentiation, and mineralization. CONCLUSIONS:The flexibility in oxide doping may allow for the tunable biological properties and corrosion-resistant ability of the apatite coatings.
