subject: What is Dental Restoration? [print this page] Another factor a reputable dentist Collierville has would stress out is the unsupported tooth structure. Unsupported enamel can be present where the underlying dentin was removed because of infiltrating decay. When preparing a tooth to receive restoration, unsupported enamel is removed to allow for a more calculated restoration. While enamel is the hardest substance found in the human body, it is actually brittle, and unsupported enamel breaks easily.