This article, focused around case presentations, follows the natural progression/exploration of a single idea about dealing with the Class II (approximal lesion) composite restoration. The gradual development of this idea and the integration of a concept from one case to the next may have certain educational value. Hopefully it will show the potential for further experimentation and inspire a fresh mentality in using and handling the main line of conservative restorative materials today, ie, resin composites. Keywords: composite resin, Class II restoration, polymerization contraction, direct treatment, shell