A crown covers a tooth. It does not retire the pulp, the root, or the edge of the tooth under the gum. Pain after a crown can be a bite that is high, cement that has irritated the pulp, a tooth that was already inflamed, decay that started at the margin, or a crack the crown did not contain. The crown being new, or old, does not pick among those.
The timing is the useful clue. Pain only on biting suggests the bite, a crack, or an inflamed ligament. A short cold sensation that stops when the cold stops is different from cold pain that lingers, or from pain that starts on its own and wakes you. Swelling or a pimple on the gum is a different report again. Bring that sequence to the visit. Do not decide from a forum that the crown must come off tomorrow, and do not decide that it must stay if the pain is worsening.
Examination may include the bite, the margin, tests of the pulp, and a radiograph when the root or the edge needs to be seen. Sometimes the crown is adjusted and the tooth settles. Sometimes the pulp needs treatment and the crown can be kept or must be remade. Sometimes decay or a crack under the crown means the tooth's prospects are worse than the crown's appearance. Those are findings, not a hierarchy of procedures.
A sore tooth in the first days after cementation can be monitored when the dentist has already checked the bite and the symptoms are mild and fading. Pain that increases, a bite that feels higher each day, or swelling is not a waiting period. Call and have the tooth seen. The crown is one possible part of the problem. It is not the name of the problem.
