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Quintessence International
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Quintessence Int 24 (1993), No. 6     1. June 1993
Quintessence Int 24 (1993), No. 6  (01.06.1993)

Page 405-408


Effect of luting media on the compressive strengths of two types of all-ceramic crown
McCormick / Rowland / Shillingburg jr. / Duncanson jr.
This study evaluated the effect of selected luting media on the compressive strengths 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.