i lost a tooth due to a hit two years ago i couldnt afford to crown it at the time but i hated the way it looked so i just had a bridge done the two teeth beside it hold it up i believe the bridge is porcelain and on the back it looks like mercury is on one tooth black or grey on the inside of the mouth of the one toothis that normal? i am in alot of pain my bridge teeth are much longer than my other teeth when i bite down the bridge teeth cover my lower jaw teeth and it seems like my jaw is out alignment now i hear popping when i open my mouth and i am having pain on my bridge side of my face neck shoulder back and arm pain is this normal?