What is a significant disadvantage of metal-ceramic crowns?

Metal-ceramic crowns, while offering certain advantages, do indeed have a significant disadvantage related to tooth reduction. The fabrication of these crowns typically necessitates a considerable amount of tooth structure removal to create adequate space for both the metal and ceramic components. This reduction is essential to ensure that the crown fits properly and provides the necessary strength, but it can compromise the remaining tooth structure.

This substantial reduction can lead to several potential complications. For instance, excessive removal of tooth structure can weaken the tooth, increasing the risk of future fractures or issues such as pulp exposure. Additionally, if too much tooth material is removed, it may limit the options for future restorations and increase the risk of requiring endodontic treatment.

In contrast, the advantages associated with easy correction of axial form, excellent retention, and high aesthetic value do not address the concerns raised by excessive tooth preparation. Thus, the need for significant tooth reduction represents a critical drawback of metal-ceramic crowns, emphasizing the importance of careful treatment planning and assessment of the existing dentition before proceeding with this restorative option.