Bonding of resinous filling materials to acid-etched teeth: a scanning electron microscopic observation

Falian, Hong; Zhao Dexin; Jiang Weizhong; Zhu Guangming
January 1989
Quintessence International;Jan1989, Vol. 20 Issue 1, p27
Academic Journal
The article presents a study on the normal and etched patterns of enamel and dentin and the bonding of resinous materials to acid-etched teeth by using scanning electron microscopy (SEM). 80 freshly extracted human permanent teeth and human teeth in vivo were chosen for the study. The etching agent used was 50% orthophosphoric acid with 7% zinc oxide (ZnO). The appearance of resinous materials impregnating the acid-etched enamel in the teeth in vitro was similar to that of teeth in vivo. The bond between resinous materials and acid-etched enamel and dentin is mainly physical and mechanical. It has been demonstrated by the SEM illustration that in enamel the bonding effect of teeth in vivo is similar to that of teeth in vitro.


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