Oral Management Center, Nagasaki University Hospital.
Division of Cariology and Restorative Dentistry, Department of Prosthetic Dentistry, Graduate School of Biomedical Sciences, Nagasaki University.
J Oral Sci. 2023 Jul 1;65(3):153-157. doi: 10.2334/josnusd.23-0010. Epub 2023 May 31.
This study aimed at evaluating the effects of surface treatments with tetrabutylammonium dihydrogen trifluoride (TDTF) on the bond strengths of indirect resin composites with titanium-aluminum-vanadium (Ti-6Al-4V) and cobalt-chromium (Co-Cr) alloys.
Disk-shaped Ti-6Al-4V and Co-Cr alloy specimens were air-abraded with alumina, treated with an etchant (MEP) containing TDTF for 10 s (MEP10) or 30 s (MEP30), and rinsed with water. Subsequently, a primer containing 6-methacryloyloxyhexyl phosphonoacetate was applied to the surfaces, and the specimens were veneered with a light-curing indirect resin composite. Specimens without MEP were prepared as controls (no-MEP). Shear bond strengths were determined before or after 100,000 thermocycles, and the data were analyzed using the Steel-Dwass test (α = 0.05, n = 10).
No significant difference was found in the bond strengths between the Ti-6Al-4V and Co-Cr alloys. In each metal alloy, the MEP10 and MEP30 specimens exhibited higher bond strengths than the no-MEP controls after 100,000 thermocycles. Scanning electron microscopy observations revealed that submicron-pits and crevices were formed on both the metal alloys upon applying the MEP etchant.
Surface treatments with TDTF following air abrasion are useful for improving bonding durability while veneering resin composites on Ti-6Al-4V or Co-Cr alloy frameworks.
本研究旨在评估四丁基氢二氟（TDTF）表面处理对钛铝钒（Ti-6Al-4V）和钴铬（Co-Cr）合金与间接树脂复合材料的粘结强度的影响。
将 Ti-6Al-4V 和 Co-Cr 合金试件圆盘状试件用氧化铝喷砂，用含有 TDTF 的蚀刻剂（MEP）处理 10 s（MEP10）或 30 s（MEP30），并用去离子水冲洗。随后，在表面涂覆含有 6-丙烯酰氧己基膦酸酯的底漆，并用光固化间接树脂复合材料覆盖试件。未用 MEP 处理的试件作为对照（无 MEP）。在 100000 次热循环前后测定剪切粘结强度，采用 Steel-Dwass 检验（α=0.05，n=10）对数据进行分析。
Ti-6Al-4V 和 Co-Cr 合金之间的粘结强度无显著差异。在每种金属合金中，与无 MEP 对照组相比，在经过 100000 次热循环后，MEP10 和 MEP30 处理的试件表现出更高的粘结强度。扫描电子显微镜观察显示，在施加 MEP 蚀刻剂后，两种金属合金表面都形成了亚微米级的凹坑和缝隙。
在空气喷砂后用 TDTF 进行表面处理，对于提高 Ti-6Al-4V 或 Co-Cr 合金框架上覆盖树脂复合材料的粘结耐久性是有用的。
