EPA 4C: Dentate Indirect Operative Stainless Steel Crown

Dentate Indirect Operative Stainless Steel Crown	Meets Expectations of the Graduate	Progressing	Below Expectations	Critical Error

Isolation and Tissue Management	No damage and/or optimal isolation		Poor isolation and/or tissue damage requiring finishing/polishing	Poor isolation and/or tissue damage that requires a major recontour or restoration
Preparation
Axis	Parallel to long axis of tooth	Minor axis discrepancy, not more than 10° off long axis of tooth crown	Preparation axis slightly off from parallel to long axis of tooth crown Minor damage to adjacent tooth, which can be polished out	Preparation axis grossly off (>20°) from parallel to long axis of tooth crown Severe damage to adjacent tooth, which cannot be polished out, and/or soft tissues compromised
Occlusal Reduction	1.0–1.25mm from cavosurface at pulpal wall (0.5mm internal to DEJ	1.5–2.0mm or < 1.0mm from cavosurface at pulpal wall (1.0mm internal to DEJ)	Convergence excessive Inadequate subgingival extension Slight margin	Convergence grossly excessive or divergent Excessive subgingival extension Distinct ledge present
Mesial and Distal Reduction	Parallel slight subgingival extension NO ledges/margin	Convergent	Taper inadequate < 5° Taper decidedly excessive (15–20° TOC) Minor undercuts	Gross undercuts (margin less than 0.5mm after blackout)
Line Angles and Wall Surfaces	Preparation rounded and smooth	Preparation slightly rough	Preparation decidedly rough and sharp	Preparation decidedly rough and sharp
Gingival Clearance	Gingival clearance between 0.5 and 0.75mm	Gingival clearance between 0.75 and 1mm OR 0 and 0.5mm		Gingival contact not broken OR > 1mm
Facial and Lingual Reduction	Minimal: rounded occlusal bevel/line angles	Reduction extends beyond occlusal 1/3		Removal of facial bulge: ledge/chamfer created
Adjacent Tissues	No iatrogenic damage		Damage to adjacent tooth or soft tissue - Recontour	Damage to adjacent tooth or soft tissue - Restore
Restoration — Stainless Steel (SSC) Adaptation
Retention	Retentive: snap fit resistance to removal with spoon excavator		Loose fit: gentle resistance to digital pressure	Loose fit: no resistance to digital pressure
Contacts/Occlusion	Marginal ridge height equal to adjacent tooth Proximal embrasures and contacts restored	Marginal ridge height slightly above or below adjacent marginal ridge (< 0.5mm) Proximal contacts visually closed		Marginal ridge height excessively above or below (> 1mm) adjacent marginal; ridge Occlusal contact not existent Proximal contact visually open

Crown Endodontics