Tooth Preparation for Prosthetic Crowns - ENG

You prepare crowns every week. But when was the last time you genuinely questioned whether your preparation geometry was correct — not just adequate, but optimal? Research shows that 30 to 40% of crown failures trace directly back to preparation design errors. Not material defects. Not laboratory mistakes. The preparation itself. Over-tapering that compromises retention. Insufficient occlusal reduction that starves the ceramic of space. Finish lines that are unclear, too deep, or biologically unsafe. These are not rare events — they are patterns, and they are preventable. This course was designed for clinicians who want to move from intuitive preparation to deliberate, evidence-based precision. Over a focused, clinically intensive session, you will rebuild your understanding of crown preparation from the ground up — starting with biomechanical first principles and ending with concrete, actionable protocols you can apply the very next morning. What You Will Master • Match preparation design to restorative material with confidence — because what zirconia demands is fundamentally different from what lithium disilicate requires, and treating every crown the same is one of the most common sources of prosthetic failure. • Understand the geometry of retention and resistance form at a level that allows intelligent decisions on atypical cases: short clinical crowns, endodontically treated teeth, periodontally compromised patients. • Command every finish line option — chamfer, rounded shoulder, knife-edge, butt joint — with full knowledge of indications, contraindications, and laboratory implications. • Recognize biological width as a hard structural boundary, not an abstract periodontal concept, and apply a three-point pre-preparation check before every subgingival margin. • Apply the ferrule principle correctly in endodontically treated teeth — including when crown lengthening is mandatory before proceeding.