Effect of acid etching and aging on bond strength of a universal adhesive on dental enamel

Abstract

Sample calculationSample size was calculated in terms of a minimum detectable difference in a mean BS (Mpa) of 0.62 (30 human teeth, 8 per group), using the same adhesive system with and without enamel acid etching. 2 However, for predicting eventual losses, 11 samples (10 stick each, on average) were included. Specimen preparationThe crown from each tooth was sectioned in the bucal-lingual direction using a 4 "x 0.012" x 0.5 "diamond cutting disc (Erios Equipamentos Ltda -EPP, São Paulo, Brazil) mounted in a precision