title: Microleakage through dentin after crown cementation.
abstract: This study investigated the relationship between type of luting cement for artificial crowns and microleakage through dentinal tubules. Standardized preparations were made on intact human premolars, and crowns were made in a base metal alloy using conventional techniques. The castings were randomly assigned to the following luting agent groups: zinc phosphate (ZP), polycarboxylate (PC), glass ionomer (GI), phosphate ester composite resin (GMA/PE), and a composite resin with a NPG-GMA dentin bonding agent (GMA/NPG). Then they were cemented in a standardized manner. The specimens were artificially aged, stained, sectioned, and microleakage occurred through dentinal tubules toward the pulp measured. The rank in order from least to most (best to worst) leakage was GMA/NPG, GI, GMA/PE, PC, and ZP. Material GMA/NPG recorded significantly less leakage than all other materials. Therefore, the results of this study suggest that material GMA/NPG may reduce pulpal sensitivity and pathosis.
authors.affiliation: Department of Restorative Dentistry, University of Southern California School of Dentistry, Los Angeles 90089-0641, USA.
authors.forename: S N
authors.initials: SN
authors.lastname: White
authors.forename: R
authors.initials: R
authors.lastname: Furuichi
authors.forename: S M
authors.initials: SM
authors.lastname: Kyomen
mesh_terms: D000704:Analysis of Variance; D001641:Bicuspid; D017438:Bisphenol A-Glycidyl Methacrylate / Q000494:pharmacology; D002484:Cementation; D003442:Crowns; D003738:Dental Cements / Q000494:pharmacology*; D003763:Dental Leakage; D003806:Dentin Permeability / Q000187:drug effects*; D003807:Dentin Sensitivity / Q000517:prevention & control; D006801:Humans; D008277:Magnesium Oxide / Q000494:pharmacology; D008689:Methacrylates / Q000494:pharmacology; D010710:Phosphates / Q000494:pharmacology; D011076:Polycarboxylate Cement / Q000494:pharmacology; D019279:Resin Cements; D015034:Zinc Oxide / Q000494:pharmacology; D015036:Zinc Phosphate Cement / Q000494:pharmacology
chemical_list: D003738:Dental Cements; C061504:Flecks; D008689:Methacrylates; D010710:Phosphates; D011076:Polycarboxylate Cement; D019279:Resin Cements; C084548:Thin Film Cement; C074811:Tenure adhesive; C031374:zinc polyacrylate; D008277:Magnesium Oxide; D017438:Bisphenol A-Glycidyl Methacrylate; D015036:Zinc Phosphate Cement; C040235:Ketac-cem; C052304:Panavia EX; D015034:Zinc Oxide