Initial examination Examination of patients was performed independently by two calibrated evaluators, in case of disagreement operators were consulted with a third operator, this in a clinical field well lit, with the tooth surface clean with brush of prophylaxis and water, for the clinical examination was used to mirror No 5 (Hu-Friedy Mfg. Co. Inc., Chicago, IL, USA), probe of caries straight with active diameter of 150 μm portion (Deppeler, Swiss Dental) and caries probe straight with active portion of diameter 250 μm (Deppeler, Swiss Dental), both indicated by the FDI. For an optimal value in the parameter of marginal adaptation, the gap should be a size less than or equal to the diameter of the active portion of the probes.