The resulting specimens were randomly divided into @ groups for the following application sequences : a ) FRC+PFC ( photopolymerized in one step ) , b ) FRC+FR ( photopolymerized in one step ) , c ) FRC+PFC ( photopolymerized individually ) , d ) FRC+FR ( photopolymerized individually ) , e ) FRC ( photopolymerized ) + intermediate adhesive resin and PFC ( photopolymerized in one step ) , f ) FRC ( photopolymerized ) + intermediate adhesive resin and FR ( photopolymerized in one step ) .