title: Influence of marginal opening on microleakage of cemented artificial crowns.
abstract: This study investigated the relationship between marginal opening and microleakage. Standardized preparations were made on intact human premolars, and copings were cast in a base metal alloy by use of conventional techniques. The castings were randomly assigned to the following luting agent groups: zinc phosphate cement, polycarboxylate cement, glass ionomer cement, phosphate ester composite resin, and a composite resin with a NPG-GMA dentinal bonding agent and were cemented in a standardized manner. The marginal openings between teeth and castings were measured, and microleakage was determined at the same points. Within the confines of the in vitro model used, no significant correlation between marginal opening and microleakage was established for either pooled data or individual luting agent groups.
authors.affiliation: Dept. of Restorative Dentistry/Biomaterials, University of Southern California, School of Dentistry, Los Angeles.
authors.forename: S N
authors.initials: SN
authors.lastname: White
authors.forename: S
authors.initials: S
authors.lastname: Ingles
authors.forename: V
authors.initials: V
authors.lastname: Kipnis
mesh_terms: D000704:Analysis of Variance; D017438:Bisphenol A-Glycidyl Methacrylate; D002484:Cementation; D003442:Crowns; D000044:Dental Abutments; D001840:Dental Bonding / Q000379:methods*; D003737:Dental Cavity Preparation / Q000009:adverse effects; D003738:Dental Cements / Q000737:chemistry*; D003763:Dental Leakage / Q000209:etiology / Q000517:prevention & control; D005899:Glass Ionomer Cements; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates; D015588:Observer Variation; D010755:Organophosphates; D011076:Polycarboxylate Cement; D012995:Solubility; D013499:Surface Properties; D015036:Zinc Phosphate Cement
chemical_list: D003738:Dental Cements; D005899:Glass Ionomer Cements; D008689:Methacrylates; D010755:Organophosphates; D011076:Polycarboxylate Cement; D017438:Bisphenol A-Glycidyl Methacrylate; C008691:NPG-GMA; D015036:Zinc Phosphate Cement