Retention and surface changes of zirconia primary crowns with secondary crowns of different materials. - Turp, IŞIL; TURP, IŞIL; BOZDAĞ, E; SÜNBÜLOĞLU, E; KAHRUMAN, C; YUSUFOĞLU, I; BAYRAKTAR, GÖZDE ASENA; BAYRAKTAR, GÖZDE ASENA (My University, 2014)