We went to the dentist on that morning and he looked into the tooth and repaired the filling and I believe applied some antiseptic type thing to the inside of the tooth. On that night he still woke in a tremendous amount of pain, so we returned to the dentist to ask that it be looked into again, at which point he gave our son a numbing injection and then drilled/opened the tooth to check, this is when he discovered the abscess. He opened (cut?) the abscess and drained it and then sealed the tooth back up and advised that that should hopefully be the end to the discomfort. However on that night he still woke in a lot of pain and need some children’s pain killers to stop the pain. I have spoken to the dentist reception today, who in turn discussed with the dentist and the recommendation is that antibiotics will not make any difference and that the only other option is to extract the tooth (as it's a molar I believe that this can cause issues with alignment of adult teeth later in life?)
My observations so far:
1.He is only really in any degree of discomfort a number of hours after going to bed (somewhere between 4 and 7 hours).
2.Very little pain during the day when he is up and on the go (e.g. he doesn't every mention being in any discomfort and when asked he says it's "fine")
3.Anti-inflammatory pain relief seems to work well and quickly
4.Applying heat and/or pressure to the tooth/area appears to help also
Really just looking for some advice on what would be the best course of action, is it possible that it may just take slightly longer for the abscess to dissipate/clear up or is extraction the only real possibility?