“…37 Over the years many injectable as well as implantable materials have been used, including shellac, beeswax, epoxy resin, petroleum jelly, Teflon, polyurethane and polyvinyl alcohol to name a few. 1,5,8,15,36,42 The silicone fill is subdivided (a) into form-stable and soft, based on level of cross-linkage; (b) by shell into textured and smooth; and finally (c) by shape into round versus anatomical. 38 The introduction of the silicone breast gel implant by Cronin and Gerow in 1962 revolutionized breast augmentation surgery.…”