Dr Timmerman was asked, “If a new crown is not right and the dentist doesn’t have the impressions, what is done?”

If the crown is already permanently placed, it must be cut off and remade.  Even if the impression was in the dentist’s hand, it would be useless, as the removal of the crown would alter the shape of the tooth.  If the crown was at the try in stage it simply could be sent back for alteration, unless the problem was model.  In both cases, a new impression would be needed.

If the crown was not cemented in place and the impression was digital, as in the case of iTero digital impressions by Cadent, then the data is still stored and can be redone.

The real question is, “Why is the crown ‘not right’?”