What is the recommended occlusal clearance for all-ceramic restoration in molar cusps?

The recommended occlusal clearance for all-ceramic restorations in molar cusps is established to ensure the longevity and functionality of the restoration. All-ceramic materials are often thinner and more brittle compared to metal-ceramic restorations. Therefore, adequate clearance is crucial to allow for the proper thickness of the ceramic, which enhances strength and reduces the risk of fracture.

For functional cusp areas, a clearance of 1.5 to 2 mm provides a sufficient thickness that can withstand the forces exerted during chewing without compromising the integrity of the restoration. Similarly, for nonfunctional cusps, the same range of 1.5 to 2 mm allows for enough material to maintain aesthetic properties and structural integrity while fitting well with the opposing dentition.

This recommendation reflects the need to balance function and aesthetics in posterior teeth restoration, where the occlusion is critical. Hence, this choice provides the necessary guidelines that dentists should follow to ensure optimal results when restoring molars with all-ceramic materials.