B. CLINICAL PROCEDURE After local anesthesia, the teeth will be isolated with a rubber dam, and tooth preparation will be made using a #330 carbide bur under water coolant spray, having their cervical margins placed on enamel. Cavity design will be limited to caries removal without an occlusal lock, but grooves will be placed on the occlusal buccal and palatal surfaces. Line and point angles will be rounded (Fig. 1).