This study aimed to evaluate the microtensile bond strengths of composite and compomer materials
repaired in accordance with the manufacturers’ recommended protocols. Three methacrylatebased
composites [Filtek Z350 XT, Tetric-N-Ceram (TNC), and Spectrum], one compomer-based
composite (Compoglass F), and one silorane-based composite (Filtek P90) were used to fabricate
42 composite blocks. Blocks were light-cured in layers of 2.0-mm thickness, and were distributed
among three groups: In group 1, cohesive blocks were layered with the same material; in group