Vertical marginal misfit of three and four units monolithic zirconia fixed partial dentures before and after cementation using two different cements

Abstract

The aim of this study was to measure the vertical marginal misfit of three and four units FPDs manufactured by Cercon machine before and after cementation by zinc phosphate and resin cements. Twenty monolithic zirconia FPDs group B was fabricated using Cercon machine. FPDs were either three or four units. Standardized metallic dies were scanned to produce the samples. Samples were divided into two main groups where group A was three units FPDs and group B was four units FPDs, each group was divided into two subgroups according to the cement used (subgroup C1: Zinc phosphate cement, subgroup C2: Resin cement Variolink N). The vertical marginal misfit of All specimens were measured before and after cementation using stereomicroscope. All data were statistically analyzed. Results showed that the vertical marginal misfit values of monolithic three and four units zirconia FPDs constructed by Cercon machine was clinically acceptable. It was found that using either conventional cementation with zinc phosphate or adhesive resin cementation produced acceptable clinical results, too.