Effects of a fluoride etchant and a phosphate primer on bonding of veneering composite to Ti–6Al–4V alloy for CAD/CAM restorations
Effects of a fluoride etchant and a phosphate primer on bonding of veneering composite to Ti–6Al–4V alloy for CAD/CAM restorations
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氟化物蚀刻剂和磷酸盐底漆对贴面复合材料与钛粘合的影响
DOI：
10.1016/j.jpor.2012.08.002
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发表时间：
2013
影响因子：
3.6
通讯作者：
Sawase T
中科院分区：
文献类型：
--
作者：
Taira Y;Odatsu T;Sawase T
目的：钛基台和上部结构通常用美观材料贴面或覆盖。方法：将Ti-6Al-4V钛合金机械研磨，氧化铝空气研磨，5wt%氟化氢铵化学腐蚀（F-etch）30 s，然后将钛合金与树脂基复合材料进行表面处理，观察腐蚀剂和底漆对钛合金与树脂基复合材料结合强度的影响。将磷酸盐底漆（MDP底漆）应用于粘合区域，然后将树脂复合材料（含或不含研磨纤维树脂复合材料（FRC））贴面在样本上。在热循环20，000次循环后测定剪切粘结强度。通过ANOVA和多重比较检验（α= 0.05）分析粘合强度数据。采用扫描电镜观察了Ti-6Al-4V合金在刻蚀前后的表面形貌。无FRC/F-蚀刻/MDP-底漆表现出最高的粘结强度（28.2 MPa），然后是无FRC/无蚀刻/MDP底漆FRC/无蚀刻/无底漆（24.2MPa）、FRC/F-蚀刻/MDP-底漆（19.9MPa）、FRC/无蚀刻/MDP-底漆（17.8MPa）、无FRC/无蚀刻/无底漆（13.6MPa），而FRC/无蚀刻/无底漆（2.5MPa）导致最低值。显微镜下观察发现，经F-酸蚀处理后的Ti-6Al-4V合金表面形成了大量的微米级和纳米级凹坑。结论：经氧化铝喷砂、氟化物酸蚀和磷酸盐底漆处理后的Ti-6Al-4V合金与贴面树脂复合材料的结合强度最高。
Purpose: 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.Methods: Disk-shaped Ti–6Al–4V alloy was machine milled, the surface was air abraded with alumina, and the alloy was chemically etched with 5wt% ammonium hydrogen fluoride (F-etch) for 30 s. 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.Results: 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.Conclusions: 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.