Principles of Tooth Preparation Practice Test

Occlusal reduction is guided by the need to provide enough material thickness to resist functional forces while preserving tooth structure and occlusion. Posterior teeth handle the bulk of chewing forces and have larger, taller cusps, which create greater stresses on a restoration. To prevent fracture and to maintain a durable crown with proper occlusal contacts, more tooth must be removed to allow a thicker restorative layer and adequate space for cement. In contrast, anterior teeth are more about esthetics and conserving tooth structure, and they experience lighter functional loads, so less occlusal reduction is typically needed. This makes the posterior preference for greater reduction the best explanation.