Q. Hi, I had two amalgam fillings yesterday morning, one in an upper left molar and the other in a lower left molar. The top filling was fine but the lower tooth was agony when the dentist drilled and I had to be given a further two injections to make it bearable. Where I had those injections is still very sore and my jaw muscle hurts too much for me to open my mouth wide enough to eat or talk loudly. Should my jaw still hurt this much and why didnt the anaesthetic work? I still have another filling to go but am now too scared to go back.