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The purpose of this study was to compare the tensile bond strength of composite resin bonded to erbium:yttrium–aluminium–garnet (Er:YAG) laser-prepared dentine after different durations of acid etching. The occlusal third of 68 human third molars was removed in order to expose the dentine surface. The teeth were randomly divided into five groups: group B (control group), prepared with bur and total...
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