Silva PFD, et al. - Authors sought to develop a method to induce carious lesions in the pulpal floor dentin of a class II cavity preparation and to ascertain the impacts of this carious lesion on the biomechanical behaviour of the dental composite restoration. The number of enamel cracks was increased by the restorative procedure, which remained unaffected by mechanical cycling. Experts noted that the biomechanical behaviour of class II restorations performed with bulk-fill dental composite was not affected with maintaining carious lesions.