What is a contraindication for metal ceramic crowns?

A contraindication for metal ceramic crowns includes untreated periodontal disease because the health of the periodontal tissues is crucial for the longevity and stability of any prosthetic restoration. In cases where periodontal disease is present, the supporting structures of the teeth are compromised. This condition can lead to further loss of attachment and bone, increasing the risk of failure for any restorative work.

In contrast, other situations, such as extensive tooth destruction due to caries, actually may warrant the use of a metal ceramic crown, since these crowns can provide the needed strength and support for a tooth that has lost significant structure. Similarly, the need for superior retention is a reason to choose crowns, including metal ceramic, as they offer excellent retention, especially in cases with adequate tooth structure. Additionally, the need to recontour the facial surface can be addressed with metal ceramic crowns, allowing for adjustments as needed in aesthetics and function without being a contraindication.