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  • Title: A scanning electron microscope study of the effect of etching time and mechanical pre-treatment on the pattern of acid etching on the enamel of primary teeth.
    Author: Meola MT, Papaccio G.
    Journal: Int Dent J; 1986 Mar; 36(1):49-53. PubMed ID: 3516887.
    Abstract:
    Eighty-five deciduous teeth, divided into five groups, were examined using a scanning electron microscope. The first two groups were etched for 60 and 120 sec respectively; the third and fourth groups were lightly milled and then etched for 60 and 120 sec respectively. In the first two groups, etching produced very few histological modifications. In the milled groups removal of the prismless enamel exposed the prisms to dissolution by the phosphoric acid. It was found that pretreatment and an etching time of 120 sec produced a constant and regularly distributed loss of inter- and intraprismatic substances.
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