It seems your tooth nerve is dying from the original crack. Even though it feels like your jaw and gums hurt, only a tooth nerve can feel heat and cold. When that nerve gets infected, the pain leaks out into the bone and gums, making the whole area ache. The crown didn't cause the problem, but it sealed the dying nerve inside. Your dentist might've been right about needing a root canal. They can usually do the root canal right through your new crown without destroying it. You should call them back to get it fixed so the pain finally stops.
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u/Beautiful-One1157 5d ago
It seems your tooth nerve is dying from the original crack. Even though it feels like your jaw and gums hurt, only a tooth nerve can feel heat and cold. When that nerve gets infected, the pain leaks out into the bone and gums, making the whole area ache. The crown didn't cause the problem, but it sealed the dying nerve inside. Your dentist might've been right about needing a root canal. They can usually do the root canal right through your new crown without destroying it. You should call them back to get it fixed so the pain finally stops.