What is the recommended occlusal reduction for a PFM crown?

The recommended occlusal reduction for a porcelain-fused-to-metal (PFM) crown is typically around 2.0 mm. This depth of reduction is necessary to allow adequate space for the metal substructure and to ensure that sufficient porcelain can be layered over the metal for aesthetic purposes and strength.

A reduction of 2.0 mm facilitates optimal contouring of the crown, which helps achieve proper occlusion and functional performance of the restoration. It also supports the natural biomechanics of the teeth, ensuring that the crown can withstand biting forces without compromising the integrity of the restoration or the underlying tooth structure.

Additionally, a depth of 2.0 mm minimizes the risk of exposure to dentin, maintaining pulp vitality and providing a sufficient margin for the cement to bond effectively. This level of reduction strikes a balance between function, longevity, and aesthetics, making it the standard recommended practice for PFM crown preparations.