title: Marginal leakage of compacted gold, composite resin, and high-copper amalgam restorations.
abstract: Amalgam and compacted gold were found to have the least marginal leakage in Class V cavities. Composite resin with acid etching performed at an acceptable level. Without acid etching the marginal seal was unsatisfactory. The following conclusions can be drawn: 1. High-copper amalgam and compacted gold are the materials of choice for Class V restorations when esthetics are not of primary concern. 2. If composite resins are to be used, they should be placed with an acid-etch technique.
mesh_terms: D000134:Acid Etching, Dental; D004396:Coloring Agents; D003188:Composite Resins; D003300:Copper; D003723:Dental Amalgam; D001840:Dental Bonding; D003743:Dental Enamel / Q000033:anatomy & histology; D003793:Dental Restoration, Permanent; D006047:Gold Alloys; D006801:Humans; D013499:Surface Properties
chemical_list: D004396:Coloring Agents; D003188:Composite Resins; D006047:Gold Alloys; D003300:Copper; D003723:Dental Amalgam