Magnesia ceramic jacket crowns.

A high-extension core material based upon magnesia has been developed. This material may be used in the construction of all ceramic jacket crowns with the same body and enamel porcelains used for porcelain fused to metal crowns. Jacket crowns may be constructed using a modified platinum foil technique with greater accuracy and higher strength. The main advantage is a stronger jacket crown with exceptional esthetics without the need for special equipment or long processes.