FIGURE 1. Schematic representation of experimental phase. a) Polyvinyl chloride (PVC) plates with cylindrical cavities (3.0 mm × 7.0 mm) prepared to do the specimens; b) Insertion of composite resin in the plates. c) Curing methods; d) Sectioning of the specimen in the central region. e) Finishing and polishing of the specimen surface; f) Microhardness tester; g) Schematic illustration of the polyvinyl chloride (PVC) plates, showing the microhardness indentations at different depths from the surface of the composite specimens.
