Porcelain fused metal crowns are custom made crowns with metal framework inside and a porcelain layer is fused on top of the metal framework , high biting and chewing pressure due to the metal framework and the porcelain layer mask the metal color thus, matches the tooth color but the porcelain layer can sometimes chip off and the metal underneath can be visible and also a dark line is also evident at the gum line. #best dental clinic #porcelain fused metal crown