| Summary: | 碩士 === 中臺科技大學 === 醫學工程暨材料研究所 === 96 === Titanium has been successfully applied in dental implants for more than 20 years and has raised interest in the possibility of crown/bridge application because of its excellent mechanical properties and biocompatibility. Recent research has found that titanium alloys not only have reduced the melting points but also improved mechanical properties. In particular, β-stable alloys are very suitable for biomedical applications. A number of different surface treatments on titanium have been shown to enhance the chemical and mechanical bonding. This investigation aims to build on previous studies of the development of new titanium alloys. Ti-10Zr and Ti-20Cr alloys were chosen for the research because of their superior mechanical performance compared to other Ti alloys which were tested in previous experiments. Sandblast, electrochemical deposition of ZrO2 and the combination are applied onto the metal surfaces prior to firing porcelain. Thermalcycling was also utilized to compare the bond strengths among the different surface treatments. Besides, XRD patterns were taken to verify the phases and compounds before and after heat treatment.
Results indicated that sandblast treatment was able to effectively improve bond strength to experimental metals, and the adherence compatibility of sandblasted Ti-20Cr alloy had the highest value among this study, it also did not effect by 20,000 thermalcycles. There α phase and other compounds were generated after heat treatment of Ti-20Cr alloy.
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