What’s one decision rule you use when choosing zirconia vs lithium disilicate for posterior crowns in severe bruxism cases? Briefly, what clinical outcome convinced you this rule works?

For posterior crowns in severe bruxism cases, prioritize durability over aesthetics. Zirconia is preferred due to its high flexural strength and fracture toughness, making it suitable for the substantial forces exerted during bruxism. Although lithium disilicate offers better aesthetics, it may not withstand extreme occlusal pressure as effectively as zirconia. Thus, choose zirconia when mechanical demands are high.