What is an inappropriate characteristic of the gingival margin for metal ceramic restorations?

In the context of metal ceramic restorations, the gingival margin should ideally possess certain characteristics to ensure proper aesthetics, functionality, and periodontal health. A rough gingival margin is considered inappropriate because it can lead to challenges in maintaining oral hygiene, increasing the risk of plaque accumulation and potential periodontal issues. A smooth margin facilitates easier cleaning and helps maintain the integrity of the soft tissues, which is crucial for the longevity of the restoration and the health of surrounding tissues.

The other characteristics, such as being distinct, smooth, and continuing circumferentially, contribute positively to the overall quality of the restoration. A distinct margin allows for a clear demarcation between the restoration and the tooth structure, enhancing the visual outcome. A smooth margin ensures a better fit and minimizes irritation to the gums, while a circumferential continuity supports the natural contour of the gingiva, promoting better esthetics and function.