Porcelain-fused-to-metal crowns –can be color matched to your adjacent teeth (unlike the metallic crowns). However, more wearing to the opposing teeth occurs with this crown type compared with metal or resin crowns. These crowns can be a good choice for front or back teeth as well as long bridges where the metal is needed for strength. This crown provides a stronger bond than regular porcelain because it is connected to a metal structure. It's also extremely durable.
All-ceramic or all-porcelain crowns - provide better natural color match than any other crown type and may be more suitable for people with metal allergies. All-ceramic crowns are a good choice for front teeth.