Ensure tooth is properly prepped : smooth margins, rounded line angles, proper occlusal clearance
Rinse and dry the tooth—maintain moisture control with cotton rolls or rubber dam
Try-in the crown to verify passive fit and full seating
Clean crown internally with : Rinse thoroughly with water and clean using an ultrasonic cleaner or soft brush with isopropyl alcohol to remove saliva, blood, and debris that may interfere with bonding. Apply a zirconia-specific cleaning agent (e.g., Ivoclean or ZirClean) for 20 seconds, rinse, and air-dry to ensure optimal surface decontamination before cementation.
Resin-Modified Glass Ionomer Cement (RMGIC)
Examples : FujiCEM, RelyX Luting Plus
Mix according to manufacturer instructions
Apply cement to internal surface of crown
Seat crown with firm finger pressure
Maintain pressure for 2–3 minutes until initial set
Remove excess cement with floss and explorer before it hardens
Check occlusion and polish margins if needed
Bioactive Luting Cement (e.g., Activa BioACTIVE)
Offers fluoride release, biocompatibility, and marginal seal