What is the ideal occlusal reduction for porcelain on a functional cusp?

The ideal occlusal reduction for porcelain on a functional cusp is indeed 2mm. This measurement is crucial for ensuring that there is sufficient thickness of the porcelain material to provide both strength and esthetics in the final restoration. Porcelain, while providing a natural appearance, needs adequate bulk to withstand the forces of occlusion without fracturing. A reduction of 2mm allows for enough material to achieve these properties while also ensuring that the crown will have a proper contour to accommodate the opposing dentition.

When considering additional factors such as esthetics, a reduction that is too shallow may compromise the translucency and appearance of the porcelain, leading to a less desirable final result. Conversely, a reduction that is too deep can compromise the tooth structure and may compromise the strength of the restoration. Thus, 2mm stands out as the optimal balance between durability and visual appeal in optimal occlusal reduction for a functional cusp.