Thosar N R, Damle S G
Dept. of Pedodontics & Preventive Dentistry, Nair Hospital Dental College, Mumbai.
J Indian Soc Pedod Prev Dent. 1997 Mar;15(1):20-4.
The purpose of present study was to compare the effect of 15 seconds & 60 seconds of etching of young permanent teeth in vitro with 50% phosphoric acid gel using scanning electron microscope. 25 pairs of enamel surfaces selected for the study were divided into 3 experimental groups. The control group consisted of unetched enamel surfaces. In Group II, the effect of 50% phosphoric acid gel was compared with 37% phosphoric acid solution for 15 seconds whereas in group III, the effect of 15 seconds & 60 seconds of etching with 50% phosphoric acid gel was compared. The degree of etching pattern was evaluated by using scoring pattern from 1-3. Results showed no significant difference between the etching pattern obtained with the use of 37% solution and 50% gel for 15 seconds. But it was observed that etching with 50% for 15 seconds resulted in equal or even an enhanced etching pattern as compared to the pattern obtained in 60 seconds with 50% phosphoric acid gel.
本研究的目的是使用扫描电子显微镜比较50%磷酸凝胶对年轻恒牙进行15秒和60秒酸蚀处理后的效果。选取25对牙釉质表面用于该研究，并将其分为3个实验组。对照组由未酸蚀的牙釉质表面组成。在第二组中，比较了50%磷酸凝胶与37%磷酸溶液15秒的酸蚀效果，而在第三组中，比较了50%磷酸凝胶15秒和60秒的酸蚀效果。通过使用1 - 3分的评分模式评估酸蚀图案的程度。结果显示，使用37%溶液和50%凝胶进行15秒酸蚀所获得的酸蚀图案之间没有显著差异。但观察到，与使用50%磷酸凝胶60秒所获得的图案相比，50%酸蚀15秒产生的酸蚀图案相同甚至有所增强。
