Which margin design is known to potentially cause deformation of the restoration?

The feather edge margin design is known to potentially cause deformation of the restoration due to its extremely thin and delicate nature. This type of margin features a very slight transition from the tooth structure to the restorative material, which can make it more vulnerable to stresses during function, leading to deformation. The lack of bulk in the feather edge can result in insufficient strength, especially if the restoration is subjected to heavy occlusal forces or thermal expansion and contraction.

In contrast, other margin designs like chamfer and shoulder are designed to provide a more robust interface between the tooth and the restoration, ensuring a better fit, retention, and stability. Beveled edges can also enhance the aesthetics and adaptation of the material but do not carry the same risks of deformation as the feather edge. Thus, understanding the properties and implications of different margin designs is crucial when planning for restorative procedures.