Effect of the shades of background substructures on the overall color of zirconia-based all-ceramic crowns.

Purpose: The objective of this study was to determine the effect of the color of a background substructure on the overall color of a zirconia-based all-ceramic crown.

Materials And Methods: Twenty one posterior zirconia crowns were made for twenty subjects. Seven premolar crowns and six molar crowns were cemented onto abutments with metal post and core in the first and second group.