Operative Dentistry, Universidade, Federal de Santa Catarina, Florianópolis, Brazil.
J Adhes Dent. 2010 Aug;12(4):295-303. doi: 10.3290/j.jad.a17709.
The aim of this study was to evaluate the microtensile bond strength of a resin composite bonded to two heat-pressed ceramics after performing different post-etching cleaning techniques.
Resin composite specimens were bonded to IPS Empress Esthetic (EE) and IPS Empress 2 (E2) heat-pressed ceramic disks after etching with 10% HF, surface cleaning, silanization and application of an unfilled hydrophobic resin. Resin composite specimens were fabricated using 4-mm (height) Tygon tubes of 0.8 mm diameter and bonded according to the post-etching cleaning technique employed (n = 30): no cleaning (NC); air-water spray for 30 s (AWS); 37% phosphoric acid etching for 30 s (PA); ultrasonic bath in distilled water for 5 min (UB); PA + UB (PAUB); application of a self-etching silane/bonding system Clearfil Silane Kit (CSK). The resin composite specimens were subjected to tensile tension at a crosshead speed of 0.5 mm/min. SEM observation and EDX analysis were performed for each group to determine elemental distribution in the samples.
Two-way ANOVA with random effect showed statistically differences between subgroups for E2, in which E2NC only showed bond strength significantly lower than E2AWS and E2BU, as indicated by Student's t-test and a contrast method. For EE, subgroups EENC and EECSK groups showed statistically significant differences between each other and among the other post-etching cleaning technique groups (p < 0.05).
Air-water spray may be used as a post-etching cleaning technique for both ceramics. The presence of residues did not significantly reduce the bond strength of resin composite to IPS Empress 2 ceramic.
本研究旨在评估对经不同后酸蚀清洗技术处理的两种热压铸陶瓷进行树脂复合粘结后的微拉伸粘结强度。
对经 10%HF 酸蚀、表面清洁、硅烷化及应用未填充疏水性树脂处理后的 IPS Empress Esthetic（EE）和 IPS Empress 2（E2）热压铸陶瓷圆盘进行树脂复合粘结。使用 4mm（高度）、直径为 0.8mm 的 Tygon 管制作树脂复合试件，根据采用的后酸蚀清洗技术（n = 30）分组：无清洁（NC）；空气-水喷雾 30s（AWS）；37%磷酸酸蚀 30s（PA）；在蒸馏水中超声清洗 5min（UB）；PA + UB（PAUB）；应用自酸蚀硅烷/粘结系统 Clearfil Silane Kit（CSK）。将树脂复合试件以 0.5mm/min 的十字头速度进行拉伸。对每组试件进行 SEM 观察和 EDX 分析，以确定样品中的元素分布。
采用随机效应的双因素方差分析显示，E2 各组间的亚组存在统计学差异，其中 E2NC 的粘结强度明显低于 E2AWS 和 E2BU，这表明经 Student's t 检验和对比法检验差异有统计学意义。对于 EE，EENC 和 EECSK 亚组间彼此之间以及与其他后酸蚀清洗技术亚组之间存在统计学差异（p < 0.05）。
空气-水喷雾可用作两种陶瓷的后酸蚀清洗技术。残留物质的存在并未显著降低树脂复合对 IPS Empress 2 陶瓷的粘结强度。
