What is the purpose of a chamfer margin in restorative dentistry?

The purpose of a chamfer margin in restorative dentistry is primarily to facilitate easier finishing of the restoration. A chamfer margin, which is a smooth, rounded edge created on the preparation, allows for better adaptation and seating of the restoration material. This design minimizes sharp angles that can complicate the finishing process, making it easier to achieve a smooth, polished surface once the restoration is placed.

The rounded nature of the chamfer is particularly beneficial for both the dentist and the lab technician, as it promotes a more seamless transition between the restoration and the surrounding tooth structure. This not only aids in achieving an aesthetic outcome but also contributes to the overall longevity and durability of the restoration. A well-finished margin helps to prevent plaque accumulation and makes it easier to maintain oral hygiene, which is essential for the success of the restoration.