I had a filling done on thr left side of my mouth.They used jack to hold my jaw open.THe next day I could noy close my jaw.After that I began to get severe pain on the winsdom tooth near my #2 molar.They diseded to remove that tooth.However the pain got worse.Finally after a 3d scan we tried a root canal on the # 2 molar.That did not work either and are still in pain after 5 months.
Thanks for your query, I have gone through your query. The pain and Erasmus following restoration of the tooth can be because of the disc displacement in the Temporomandibular joint since you are telling you kept your mouth open for long time, and they used mouth prop to keep your mouth open. This might have caused damage to the disc in the TMJ. The other possible cause can be a wisdom tooth infection. Consult an oral physician and get it evaluated. If it is disc problem, You can take anti-inflammatory Chat Doctor.  You can also take muscle relaxants like chlorzoxazone. You can give hot fomentation over the joints. Do not eat hard things, do not open your mouth too wide. Take soft diet. If it is a wisdom tooth infection then you can take a course of antibiotics like amoxicillin 500\u00a0mg and metronidazole 400\u00a0mg TID for 5 days (if you are not allergic) and get the tooth removed. To confirm both of these conditions get an OPG and TMJ view done. I hope my answer will help you, take care.