What type of margin is preferred when preparing a veneer?

When preparing a veneer, a chamfer margin is preferred because it provides a harmonious balance between retaining tooth structure and achieving an adequate bond surface for the veneer. The chamfer margin creates a gradual transition between the tooth structure and the veneer, allowing for a more aesthetically pleasing and natural appearance while also facilitating the flow of the restorative material.

This type of margin helps in distributing the occlusal forces effectively, reducing the likelihood of veneer failure due to stress concentration at sharp edges. Additionally, a chamfer allows for easier finishing and polishing, contributing to the overall aesthetics of the final restoration.

Shoulder margins, while providing a defined line for the material, can sometimes lead to a less favorable stress distribution and may require more tooth reduction than necessary. Feather edges are too thin and can compromise the strength and durability of the veneer, increasing the risk of chipping. A chisel edge can also lead to similar issues, as it does not provide adequate bonding surface area and can result in increased stress on the veneer.