title: Staining at the margins of composite resin restorations.
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D003116:Color; D003188:Composite Resins; D003793:Dental Restoration, Permanent / Q000379:methods*; D006801:Humans; D066298:In Vitro Techniques
chemical_list: D003188:Composite Resins