Retief D H
J Oral Rehabil. 1975 Jan;2(1):75-96. doi: 10.1111/j.1365-2842.1975.tb00912.x.
The chemical treatment of enamel surfaces is an approach in obtaining increased bonding of dental materials to tooth srufaces. Three etching solutions commonly used at present are 50% H3PO4, 50% H3PO4 attenuated with 7% zinc oxide and 50% citric acid. The effects of these three conditioning solutions on normal and polished enamel surfaces and on the interfaces between untreated enamel and etched enamel surfaces were studied by scanning electron microscopy. The variable etching pattern observed with each of the acids made a comparative study difficult. This was further complicated by the dependence of the etching action on prism orientation on polished enamel surfaces. Additional factors that have to be considered are the presence of prismles enamel and perikymata. Surface profile recordings of polished and acid-etched polished enamel surfaces provided some quantitative measure of the etching action of the conditioning solutions. The 50% citric acid solution had the mildest etching action while 50% H3PO4 and 50% H3PO4 attentuated with 7% zinc oxide elicited comparable responses.
牙釉质表面的化学处理是一种增加牙科材料与牙齿表面结合力的方法。目前常用的三种蚀刻溶液分别是50%的磷酸、用7%氧化锌稀释的50%磷酸以及50%的柠檬酸。通过扫描电子显微镜研究了这三种处理溶液对正常和抛光牙釉质表面以及未处理牙釉质与蚀刻牙釉质表面之间界面的影响。观察到的每种酸的蚀刻图案各不相同，使得比较研究变得困难。而蚀刻作用对抛光牙釉质表面棱柱方向的依赖性进一步加剧了这种复杂性。其他需要考虑的因素包括无棱柱牙釉质和釉小皮的存在。对抛光和酸蚀抛光牙釉质表面的表面轮廓记录为处理溶液的蚀刻作用提供了一些定量测量。50%的柠檬酸溶液蚀刻作用最温和，而50%的磷酸和用7%氧化锌稀释的50%磷酸引发的反应相当。
