Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, 1-7-1 Sakamoto, Nagasaki, Japan.
J Prosthodont Res. 2013 Jan;57(1):30-5. doi: 10.1016/j.jpor.2012.08.002. Epub 2012 Nov 28.
Titanium abutments and superstructures are commonly veneered or covered with esthetic materials. The present investigation was carried out to evaluate the effects of an experimental surface treatment using etchant and primer on bond strength between a resin composite and Ti-6Al-4V alloy.
Disk-shaped Ti-6Al-4V alloy was machine milled, the surface was air abraded with alumina, and the alloy was chemically etched with 5 wt% ammonium hydrogen fluoride (F-etch) for 30s. A phosphate primer (MDP-primer) was applied to the bonding area, and then a resin composite, with or without milled-fiber resin composite (FRC), was veneered on the specimen. Shear bond strengths were determined after thermocycling for 20,000 cycles. Bond strength data were analyzed by means of ANOVA and a multiple comparison test (α=0.05). The surface of Ti-6Al-4V alloy was observed using a scanning electron microscope before and after the etching procedure.
No-FRC/F-etch/MDP-primer exhibited the highest bond strength (28.2 MPa), followed by No-FRC/No-etching/MDP-primer (24.2 MPa), FRC/F-etch/MDP-primer (19.9 MPa), FRC/No-etching/MDP-primer (17.8 MPa), No-FRC/No-etching/No-primer (13.6 MPa), while FRC/No-etching/No-primer (2.5 MPa) resulted in the lowest value. Microphotographs showed that numerous micro and nano pits were created on the Ti-6Al-4V alloy surface modified with F-etch.
The bond strength between Ti-6Al-4V alloy and the veneering resin composite was the highest when the alloy surface was modified with alumina blasting, fluoride etchant, and phosphate primer successively.
钛基台和上部结构通常用贴面或覆盖美观材料。本研究旨在评估使用酸蚀剂和底漆对钛-6 铝-4 钒合金和树脂复合材料之间粘结强度的实验表面处理的影响。
将圆盘状钛-6 铝-4 钒合金机械铣削，用氧化铝喷砂处理表面，并用 5wt%氟化氢铵（F-etch）化学蚀刻 30s。将磷酸底漆（MDP-底漆）涂覆在粘结区域，然后在试件上贴面或不贴面研磨纤维增强树脂复合材料（FRC）。经过 20000 次热循环后，测定剪切粘结强度。采用方差分析和多重比较检验（α=0.05）对粘结强度数据进行分析。在蚀刻前后，用扫描电子显微镜观察钛-6 铝-4 钒合金的表面。
无 FRC/F-etch/MDP-底漆表现出最高的粘结强度（28.2 MPa），其次是无 FRC/无蚀刻/MDP-底漆（24.2 MPa）、FRC/F-etch/MDP-底漆（19.9 MPa）、FRC/无蚀刻/MDP-底漆（17.8 MPa）、无 FRC/无蚀刻/无底漆（13.6 MPa），而 FRC/无蚀刻/无底漆（2.5 MPa）的粘结强度最低。显微照片显示，经过 F-etch 处理的钛-6 铝-4 钒合金表面形成了许多微纳米坑。
当钛-6 铝-4 钒合金表面依次用氧化铝喷砂、氟化物酸蚀和磷酸底漆处理时，钛-6 铝-4 钒合金与贴面树脂复合材料之间的粘结强度最高。
