title: Effect of luting media on the compressive strengths of two types of all-ceramic crown.
abstract: This study evaluated the effect of selected luting media on the compressive strength of two types of all-ceramic crown. Tooth preparation was standardized; each preparation had a shoulder width of approximately 1.2 mm, and all internal preparation angles were rounded. Hi-Ceram and Dicor all-ceramic crowns were fabricated and cemented into the preparations with zinc phosphate, glass-ionomer, or composite resin cement. Coronal compressive fracture strengths were determined, using a set of unrestored teeth as a control. There were no statistically significant differences among the mean compressive strengths of the three luting media, and there was no statistically significant difference between the mean compressive strength of Dicor and that of the natural tooth control.
authors.affiliation: Department of Fixed Prosthodontics, University of Oklahoma, College of Dentistry, Oklahoma City 73190.
authors.forename: J T
authors.initials: JT
authors.lastname: McCormick
authors.forename: W
authors.initials: W
authors.lastname: Rowland
authors.forename: H T
authors.initials: HT
authors.lastname: Shillingburg
authors.forename: M G
authors.initials: MG
authors.lastname: Duncanson
mesh_terms: D000537:Aluminum Oxide; D001732:Bite Force; D002516:Ceramics; D003442:Crowns; D003738:Dental Cements; D003776:Dental Porcelain; D003799:Dental Stress Analysis; D006801:Humans; D008277:Magnesium Oxide; D008422:Materials Testing; D011076:Polycarboxylate Cement; D011140:Polyurethanes; D015034:Zinc Oxide; D015036:Zinc Phosphate Cement
chemical_list: D003738:Dental Cements; C047475:Dicor ceramic; C062269:Hi Ceram; D011076:Polycarboxylate Cement; D011140:Polyurethanes; D003776:Dental Porcelain; D008277:Magnesium Oxide; C031892:biomer; D015036:Zinc Phosphate Cement; C040235:Ketac-cem; D000537:Aluminum Oxide; D015034:Zinc Oxide