What is the recommended width of a chamfer margin for a cast crown?

The recommended width of a chamfer margin for a cast crown is typically about 1 mm. A chamfer margin is advantageous because it provides an effective transition between the prepared tooth structure and the crown material, allowing for better fit and aesthetics. The width of 1 mm allows for enough bulk of the material to ensure strength while maintaining the accuracy of the margin.

A margin that is too narrow, as suggested in the chosen answer, could compromise the integrity of the crown and its ability to withstand forces during function. It also risks not providing adequate space for the proper thickness of the crown material, which can affect the final restoration's durability and appearance. In contrast, a wider margin, such as 1.5 mm or more, can lead to excessive tooth preparation and potentially weaken the remaining tooth structure. Therefore, a 1 mm chamfer strikes the right balance for optimal clinical outcomes in cast crown restorations.