The PFM (porcelain fused to metal) crowns have a metal base coated with ceramic. PFM’s came closer to the look of real teeth and also provided good strength, durability and fit. A drawback of these crowns however could be a black metal line seen along the border of the crown. Also, it is difficult to achieve the translucency of your natural teeth with a restoration that has a metal framework. Light does not pass through the metal base like it does through your own natural teeth, leaving a dull lifeless appearance.
On the other hand in metal free ceramic crowns, the metallic look and the black lines disappear.They are not only highly aesthetic but also offer high strength restorations to dental industry. Types of metal free available at our center.