Which of the following is a typical method to verify marginal fit of a CAD/CAM crown chairside?

• A. Visual inspection alone
• B. Radiographs
• C. Use fit-checker paste or silicone verification to detect marginal gaps and confirm seating
• D. Checking occlusal contacts with articulation film

Answer: (C)

Verifying marginal fit is best done with fit-checker paste or a silicone verification material around the prepared tooth. When the crown is seated, these materials show where the margins are not in contact, revealing any marginal gaps and confirming proper seating. This intraoral readout is immediate and directly demonstrates whether the crown margins will seal properly once cemented. Visual inspection alone can miss micro-gaps, and radiographs aren’t reliable for assessing fine marginal interfaces because they’re two-dimensional and can’t clearly show the margin after cementation. Checking occlusal contacts with articulation film focuses on bite relationships, not the fit at the margins.