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目的：实验研究湿润粘接技术修复Ｖ类洞洞型时，壁处与龈壁处的微渗漏的比较．方法：４８颗人离体磨牙根据颊、近中和远中面分别分成Ａ、Ｂ、Ｃ三组，每组又随机分成４小组（ｎ＝１２），洞型位于釉牙本质交界处．Ａ１和Ａ２组常规制备Ｖ类洞洞型；但Ａ２制备洞缘斜面；Ａ３、Ａ４用空气喷磨技术制备Ｖ类洞洞型，但分别使用方法５０μｍ和２７μｍ氧化铝微粒．Ｂ、Ｃ各小组处理与相应Ａ组相同．所有牙齿用０．５％亚甲基蓝着色．结果：所有标本在龈壁处存在严重的微渗漏（ｐ＜０．００１）．结论：湿润粘接技术未能显著减少Ｖ类洞龈壁处的微渗漏
OBJECTIVE: To compare the microleakage between the gingival wall and the gingival wall when using the wet bonding technique to repair the V-type cavity. METHODS: Forty-eight human molars were divided into three groups A, B and C according to the buccal, mesial and distal surfaces, and each group was randomly divided into 4 groups (n = 12). The cavity was located at the junction of enamel and dentin. Class A1 and A2 were prepared as V-type cavities; however, A2 was used to prepare cave-edges; and A3 and A4 were prepared with V-type cavities by air blasting, but 50 μm and 27 μm alumina particles were used respectively. B, C Each group is treated in the same way as the corresponding group A. All teeth were colored with 0.5% methylene blue. Results: All specimens had severe microleakage at the gingival wall (p <0.001). Conclusions: The wet bonding technique failed to significantly reduce microleakage at the gingival wall of Class V cavities