Objective This study aimed to investigate the artifacts of different porcelain-fused-to-metal crowns and metal crowns on magnetic resonance imaging(MRI). Methods One Co-Cr porcelain crown, one Co-Cr metal crown, one Ni-Cr porcelain crown, and one Ni-Cr metal crown were placed in a cylindrical plastic vessel filled with distilled water. An arcrylic resin crown was used as control and then scanned using roution head sequence, including FRFSET2WI, GRET2*WI, and T1FLAIR, on a 1.5 T scanner. The MRI artifact areas of different porcelain-fused-to-metal crowns and metal crowns were calculated and analyzed with variance test. Results ANOVA of factorial design indicated significant differences among the crowns. Co-Cr metal crown produced the largest artifact, whereas Ni-Cr porcelain crown produced the least. Conclusion Various crowns differently affected MRI images. The artifacts produced by the crowns were closely related to the type of material.
