Effect of adhesive luting agents on the marginal seating of cast restorations.
This study determined the effect of new adhesive luting agents on the marginal seating of cast restorations. Standardized preparations were completed on freshly extracted premolars, impressions were made, and complete metal veneer crowns were cast with a base metal alloy. The castings were placed on their respective teeth and the extent of marginal opening was recorded. They were then assigned to a luting agent group: glass ionomer cement (GI), polycarboxylate cement (PC), microfilled BIS-GMA composite resin with NPG-GMA/PMDM dentinal bonding agent (GMA + NPG), microfilled BIS-GMA/phosphate ester composite resin (GMA/PE), or zinc phosphate cement (ZP). The castings were cemented and marginal openings remeasured. ANOVA revealed that the cement groups were similar before cementation (p 0.35) but were different after cementation (p < 0.0001). Tukey's multiple comparisons test identified statistically similar groups that were different from other groups and ranked them from lesser to greater marginal opening: (GI, ZP, PC) (GMA/PE, GMA + NPG).
White
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Department of Restorative Dentistry, University of Southern California School of Dentistry, Los Angeles.
Kipnis
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D000269:Adhesives / Q000737:chemistry*; D000704:Analysis of Variance; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D002484:Cementation; D002858:Chromium Alloys / Q000737:chemistry; D003442:Crowns; D003734:Dental Casting Investment / Q000737:chemistry; D003737:Dental Cavity Preparation; D003738:Dental Cements / Q000737:chemistry*; D006801:Humans; D008277:Magnesium Oxide / Q000737:chemistry; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D015588:Observer Variation; D010710:Phosphates / Q000737:chemistry; D011076:Polycarboxylate Cement / Q000737:chemistry; D019279:Resin Cements; D013314:Stress, Mechanical; D013499:Surface Properties; D015034:Zinc Oxide / Q000737:chemistry; D015036:Zinc Phosphate Cement / Q000737:chemistry
D000269:Adhesives; D002858:Chromium Alloys; D003734:Dental Casting Investment; D003738:Dental Cements; C061504:Flecks; D008689:Methacrylates; D010710:Phosphates; D011076:Polycarboxylate Cement; D019279:Resin Cements; C074811:Tenure adhesive; C031374:zinc polyacrylate; D008277:Magnesium Oxide; D017438:Bisphenol A-Glycidyl Methacrylate; C036884:Rexillium III; D015036:Zinc Phosphate Cement; C040235:Ketac-cem; C052304:Panavia EX; D015034:Zinc Oxide