Upper molar crowned, root canaled, if soreness is, due to bite (unprofessional) only, can it still get infected? assuming root canal was successful.

See your dentist: A bite where you have too much force on one tooth can cause pain while biting. This is not an infection but it does need to be adjusted. This can be a simple adjustment. There are other reasons for pain after a root canal also. It is best to see you dentist and find out what is going on.

Maybe: If your bite is off, have it adjusted by your dentist. Root canal teeth can be more brittle than vital teeth and a "high" bite can eventually cause a fracture which possibly could lead to an eventual infection. The soreness may be relieved by just having the bite equilibrated.

If your Assumption : Is valid, the bite is a very likely a cause of ongoing discomfort. No real relation of bite issue and re-infection. Ligament tissues around the tooth roots are highly saturated with nerves and any lingering inflammation can keep the tooth symptomatic even w a good bite. Ask your dr. To help. There are medications to lower inflammation. Lets hope the root canal was truly successful.

Residual pain: If the root canal was very recent, it is common for the tooth to have residual pain, which should subside. If the the bite is off, a simple adjustment should take care of it. Don't be to quick to throw your gp under the bus! go back and have it evaluated. Good luck.