An In-Vitro Assessment of Marginal Fit of Zirconia Crowns

A Comparative Study

Abstract

The marginal fit of the crown is not proper, then there may be a cause for the gingival inflammation of the tooth or teeth. To evaluate the marginal fit of all ceramic crowns fabricated with zirconia cored crowns with layering and monolithic crowns. From a standardized die of a prepared tooth 20 dies were poured with type IV gypsum product. Zirconia copings with layering as group I and Monolithic crowns as group II were fabricated on the dies with 10 samples in each group. 20 crowns were cemented with resin cement. Marginal fit of the sectioned crowns were measured using stereomicroscope. Points will be taken in the marginal area of mesial and distal surface of the crowns. Mean values will be compared in two groups I, II for better marginal fit of the sectioned crowns. Marginal fit of monolithic crown have better marginal fit than zirconia coping with layering crowns. It was concluded that mean marginal fit of zirconia copings with layering crowns group I, and monolithic crowns group II significantly differ.