Fig. 7

Representative SEM microimages for the tested specimens under x100 and x200 showing different adhesive failures: (1a, b) between resin cement and dentin (Type IV) in a sample restored with standard FRC post, (2a, b) between resin cement and resin composite (Type III) in a sample restored with anatomically customized FRC post, (3a, b) between fiber post and resin composite (Type II) in a sample restored with anatomically customized FRC post. (De, Dentin; Ce, Resin Cement; Rc, Resin composite Fp, Fiber Post)