What is a major consequence of an overhang on an amalgam crown?

An overhang on an amalgam crown leads to issues with plaque accumulation and makes oral hygiene more challenging. When an overhang is present, it creates a ledge that can trap food particles and plaque, which are difficult to clean effectively with regular brushing and flossing. This accumulation of plaque can contribute to periodontal issues and decay in adjacent teeth, as the trapped plaque can lead to inflammation and other complications in gum health.

In contrast, options that suggest benefits like improved aesthetics, reduced plaque accumulation, or enhanced gum health do not accurately reflect the consequences of having an overhang. Instead, documenting the implications of an overhang highlights the importance of proper restoration and maintenance to ensure optimal oral hygiene.