“…Therefore, all restorative materials should have intrinsic characteristics, to allow their detection and delimitation against enamel, dentin or cement. Therefore, radiopacity of restorative dental materials is of paramount importance because it helps the clinician to detect secondary caries, restorations' integrity and contours, missing interproximal contacts, marginal defects, voids, interfacial gaps, cement overhangs or misplaced fragments in case of trauma [7,8,9,10,11,12]. However, excessive radiopacity would mask the dental structures and consequently may reduce the ability to diagnose recurrent caries [13,14].…”