Place retention pins, if desired. Check to make sure existing crown fits over post or pins. Smooth the inside of the existing crown with a bur and remove any undercuts. Place a separating medium or a thin film of Vaseline or wax inside the crown. Mix equal amounts of HardCore Parts A and B to a uniform color, about 20 seconds, and fill the crown with HardCore .
Place caps on jars immediately after use.
Seat crown into position over the post or pins. Remove excess material from the cervical line of the tooth and allow to chemical cure. Chemical cure is complete 8 minutes from beginning of mix. Carefully remove crown and clean out separating medium. Remove flash from the cervical line of the tooth and cement the crown.