What is considered the most conservative margin design?

The feather edge margin design is recognized as the most conservative approach when preparing a tooth for indirect restorations. This margin type preserves the maximum amount of healthy tooth structure while still allowing for a sufficient seal of the restoration.

Because of its minimal invasiveness, the feather edge design enables dentists to maintain as much of the natural tooth as possible. This is especially important in longevity and structural integrity, allowing for an optimal fit of the restoration while reducing the risk of pulp exposure or weakening the tooth.

In contrast, other designs like the chamfer, bevel, and beveled shoulder typically require more tooth structure to be removed, resulting in a less conservative approach. Each of these designs may serve specific purposes in restorative dentistry, but they generally involve sacrificing more enamel and dentin to achieve the desired restorative margin. Therefore, the feather edge stands out for its ability to prioritize tooth preservation while still achieving clinical objectives.