Porcelain Fused to Metal Crowns: When biting pressure is too great for porcelain jackets, or gaps from missing teeth must be filled in, metal alloy must be placed under the porcelain for strength. This is the porcelain fused to metal crown technique.
More tooth structure is removed to accommodate both metal and porcelain.
Once an impression is taken, a metal coping is made on the prepared tooth. This is then covered with porcelain.
Porcelain fused to metal crowns do not have the translucency of pure porcelain crowns. Therefore, aesthetics may be slightly compromised in some situations. However, a talented ceramist with experience in custom staining can usually overcome these limitations, thereby creating life like restorations.
When teeth are loose due to periodontal bone loss, this technique is used. Here the crowns are splinted together by joining the metal substructure of the crowns so they are tied together like a small fence in the mouth.