Summitt J B, Chan D C, Dutton F B, Burgess J O
University of Texas Health Science Center at San Antonio, Dental School, Department of Restorative Dentistry 78284.
Oper Dent. 1993 Jan-Feb;18(1):37-40.
This study compared microleakage of composite bonded to etched flattened enamel in seven groups of five extracted maxillary molars. The facial enamel of the molars was ground flat and etched for 20 seconds with 37% phosphoric acid gel. In one group, etching gel was not rinsed but dried only. In four groups, gel was rinsed with an air/water spray for varying amounts of time. In the other two groups, gel was rinsed with water only for two different amounts of time. Etched surfaces were dried, and a liquid resin was applied and polymerized; a button of composite resin was polymerized to the flattened surface. Specimens were thermocycled, stained, then sectioned longitudinally. Microleakage was measured at the occlusal and gingival enamel margins and expressed as a percentage of the total length of interface. A mean (SD) percentage microleakage was determined at the occlusal and at the gingival margins for each group as follows: no rinse--89.60 (14.34); one second--water 0 (0), air/water 0 (0); three seconds--water 0.98 (1.34), air/water 0 (0); five seconds--air/water 0 (0); 20 seconds--air/water 0 (0). Because of abnormal distribution, data were analyzed using Wilcoxon two-sample tests. The no-rinse group had significantly more microleakage than any of the other groups (P = 0.0067), which were not significantly different from each other (P = 0.18). A one-second rinse with either water or air/water spray was as effective as a 20-second rinse with air/water spray in preventing microleakage at the resin-enamel interface.
本研究比较了七组，每组五颗拔除的上颌磨牙中，复合树脂粘结到酸蚀平整釉质后的微渗漏情况。将磨牙的颊面釉质磨平，并用37%磷酸凝胶酸蚀20秒。在一组中，酸蚀凝胶未冲洗，仅进行干燥处理。在四组中，用空气/水喷雾冲洗凝胶不同时间。在另外两组中，仅用水冲洗凝胶不同时间。酸蚀后的表面干燥后，涂抹液体树脂并聚合；将复合树脂块聚合到平整表面。对标本进行热循环、染色，然后纵向切片。在咬合面和牙龈釉质边缘测量微渗漏，并以界面总长度的百分比表示。计算每组在咬合面和牙龈边缘的平均（标准差）微渗漏百分比如下：未冲洗组——89.60（14.34）；一秒冲洗——水冲洗0（0），空气/水冲洗0（0）；三秒冲洗——水冲洗0.98（1.34），空气/水冲洗0（0）；五秒冲洗——空气/水冲洗0（0）；20秒冲洗——空气/水冲洗0（0）。由于分布异常，使用Wilcoxon双样本检验分析数据。未冲洗组的微渗漏明显多于其他任何组（P = 0.0067），其他组之间无显著差异（P = 0.18）。用水或空气/水喷雾冲洗一秒在防止树脂-釉质界面微渗漏方面与用空气/水喷雾冲洗20秒同样有效。
