Influence of refractory on the color of VM7 metal free ceramics.

Introduction: The aim of this study was to evaluate the influence of metal oxides from investment dies on the color of metal-free VM7 ceramic.

Materials And Methods: Forty circular patterns were made with an elastic gelatin duplicator. These were divided into four groups (n = 10) for pouring the investment: G1, Begoform (Bego); G2, Ducera Lay Superfit (DeguDent GmbH); G3, Duravest (Polidental), and G4, Refrax Magnum (CNG).