2.4 Treatment Groups 2.4.1 Repair The clinicians (PV - GM) used carbide burs (330-010 Komet, Brasseler GmbH Co., Lemgo, Germany) to explore the defective margins of the restorations, beginning with the removal of part of the restorative material adjacent to the defect to act as an exploratory cavity; this allowed a proper diagnosis and evaluation of the extent of the defect. Provided that the defect was limited and localized, the clinician then removed any defective tooth tissue. Once this material was removed, an exploratory cavity preparation was done that included removal of any demineralized and soft tooth tissue. A self-priming resin bonding system was used (Adper Prompt L-Pop; 3M ESPE, St. Paul, MN, USA), followed by restoration with a resin-based composite (RBC) restorative material (Filtek Supreme; 3M ESPE). A rubber dam isolation was used for this procedure.