Fig. 2From: Effect of erosive media on microhardness and fracture toughness of CAD-CAM dental materialsSEM images showing the critical size defects for groups: A Ceramill Zolid HT+, B IPS e.max CAD, C Vita Enamic, and D Grandio Blocs. Hackle lines originate from the surface defects indicating the direction of fractureBack to article page