What advantage does a subgingival margin have compared to a supragingival margin?

A subgingival margin offers significant advantages in terms of esthetics, particularly in restorative dentistry. This type of margin is placed below the gumline, allowing for a more natural transition between the tooth and the restoration, resulting in a more seamless appearance. This is especially important in cases where the restoration involves anterior teeth, as a subgingival margin can help hide the margins of the restoration, reducing the visibility of the material used and enhancing the overall aesthetic outcome.

In contrast, supragingival margins are located above the gumline and, while easier to manage during preparation and less prone to plaque accumulation, they can often be more visible, particularly in areas of high cosmetic demand. This visibility can be a drawback, especially for patients seeking a natural look in their smile or for those with high lip lines that expose the margins of their dental restorations. The placement of a subgingival margin balances functional requirements with the need for a pleasing aesthetic appearance, making it a popular choice for various dental applications.