Source: Supra-Gingival Minimally Invasive Dentistry: A Healthier Approach to Esthetic Restorations, published by Wiley-Blackwell Mechanically Retained Dentistry Is Less Beautiful It is interesting that one of the primary reasons given for placing margins subgingivally in dentistry fails so often. Historically, restorative margins have been placed subgingivally because of the desire to hide the unsightly margin of opacious crowns, usually PFM... read more »