Characteristics of arches and cavities
(*) SEEBSy, self-etch with selective enamel etching and bulk in syringe; SETBSy, self-etch and bulk in syringe; SEEBCa, self-etch with selective enamel etching and bulk in capsule; SETBCa, self-etch and bulk in capsule; SEEIn, self-etch with selective enamel etching and incremental composite; SETIn, self-etch and incremental composite.The four operators (C.T., E.A., L.L., and S.M.) were dentists with more than five years of clinical experience in Operative Dentistry and were calibrated by the study director (M.B.) to perform all restorative procedures. For the calibration, the study director placed one restoration of each group to familiarize the operator with the steps involved in the protocol. Then, the operators placed three restorations in a clinical setting, one of each group, under the supervision of the study director. Any defects of the restorative protocol were identified and discussed with the operator before starting the study. Once these procedures were completed, the operators were considered calibrated to perform the restorative procedures. The calibrated operators restored all teeth under the supervision of the study director.