Overcontouring of a restoration is most likely to result from which margin design?

Overcontouring of a restoration is most likely to result from a feather edge margin design due to its specific characteristics. A feather edge margin is designed to transition smoothly from the restoration to the tooth structure, with very little margin thickness and a subtle taper. This design can create a tendency to overcontour the restoration, as it allows for less precise control over the material application, leading to excess restorative material being placed.

When the feather edge is not adequately trimmed or shaped, it can result in a restoration that extends significantly beyond the original contour of the tooth. This can affect both the aesthetic outcome and the functional integrity, particularly if occlusal surfaces or interproximal contacts are compromised.

In contrast, margin designs such as chamfer, shoulder, or beveled shoulder offer more definitive edges and support for restorative materials, which helps maintain contour and reduces the likelihood of overcontouring. These designs provide better delineation of the boundaries for the restorative material, thus enhancing the precision in restoration procedures.