The Chairside Instructor 28 Crown Preparation and Placement Decay, Cavities and Restorations Full porcelain fused to metal crown Full porcelain/ceramic crown Full gold crown Posterior (Rear) Crowns Replacing a Filling With a Crown Before – Amalgam filling with decay at the edge After – Filling replaced by a crown Posterior Crown Placement Before – Worn filling with decay under filling Crown is positioned over prepared tooth After crown placement