Borsatto Maria Cristina, Corona Silmara Aparecida Milori, Chinelatti Michelle Alexandra, Ramos Renata Pereira, de Sá Rocha Renata Andréa Salvitti, Pecora Jesus Djalma, Palma-Dibb Regina Guenka
Department of Pediatric Clinics, Social and Preventive Dentistry, Ribeirão Preto School of Dentistry, University of São Paulo, Brazil.
J Dent Child (Chic). 2006 May-Aug;73(2):122-6.
The purpose of this study was to assess in vitro the influence of 3 cavity preparation devices (carbide bur, Er:YAG laser, and air abrasion) on the microleakage of flowable composite restorations in primary teeth.
Fifteen primary second molars were selected, and Class V cavities were prepared on the buccal/lingual surfaces, being assigned to 3 groups (n= 10). Group 1 (control) was prepared using a high-speed handpiece and was acid etched. Group 2 was prepared and treated with a Er:YAG laser (400mJ/4Hz and 80mJ/4Hz, respectively) and was acid etched. Group 3 was prepared and treated with an air abrasion system and was acid etched. Cavities were restored and stored for 7 days. Restorations were polished, thermocycled, immersed in 0.2% rhodamine B, sectioned, and analyzed for leakage.
Er:YAG laser-prepared cavities showed the highest degree of infiltration. The performance of the air abrasion device was comparable to that of the high-speed handpiece.
It may be concluded that the method of cavity preparation affected the microleakage of Class V cavities restored with flowable composite in primary teeth.
本研究旨在体外评估3种窝洞制备器械（车针、铒钇铝石榴石激光和空气喷砂）对乳牙流动复合树脂修复体微渗漏的影响。
选取15颗乳牙第二磨牙，在颊/舌面制备V类洞，分为3组（每组n = 10）。第1组（对照组）使用高速手机制备窝洞并进行酸蚀。第2组使用铒钇铝石榴石激光（分别为400mJ/4Hz和80mJ/4Hz）制备并处理窝洞，然后进行酸蚀。第3组使用空气喷砂系统制备并处理窝洞，接着进行酸蚀。窝洞修复后保存7天。修复体进行抛光、热循环处理，浸泡在0.2%的罗丹明B中，切片并分析渗漏情况。
铒钇铝石榴石激光制备的窝洞显示出最高的渗透程度。空气喷砂器械的性能与高速手机相当。
可以得出结论，窝洞制备方法影响了乳牙用流动复合树脂修复的V类洞的微渗漏。
