title: Microleakage of several amalgam systems: an animal study.
abstract: Restorations placed without the application of cavity varnish to the cavity walls and the cavosurface angle exhibited significant marginal leakage after 24 hours and 3 months. At the end of 6 months a decrease in leakage was exhibited with all alloys. With the exception of two specimens, restorations placed after coating the cavity walls and the cavo-surface angle with cavity varnish demonstrated slight or no marginal leakage at all time intervals. The results of this study indicate that the marginal leakage of a conventional filing alloy, a conventional spherical alloy, and two high-copper alloys are approximately the same. The corrosion-resistant high-copper alloys showed the same degree of marginal leakage as the conventional alloys. The results of this study agree with those of a previously reported in vitro study on amalgam leakage.
mesh_terms: D000818:Animals; D001345:Autoradiography; D003300:Copper; D003722:Dental Alloys; D003723:Dental Amalgam / Q000592:standards*; D003736:Dental Cavity Lining; D004285:Dogs; D013499:Surface Properties
chemical_list: D003722:Dental Alloys; D003300:Copper; D003723:Dental Amalgam