My crown came off a molar - dentist put it back on. It came off the second time (broke off). Dentist sent me to Endodontist for a root canal. One week later dentist put in a tempory crown. Two days later my face became swollen in up to my eye and down to my lower jaw. Called dentist he sent cephalexin 500 MG. Then had me go back to Endodontist saying it had to be caused by the root canal. Endodontist took 3Xrays and said he couldn't tell what the problem is and needs to do surgery. He says can't be root canal. Maybe the pin the dentist put in to hold the crown perferated the root or the root cracked. My concern is each is trying to put the problem on the other. Should I seek another opinion? The swelling has gone down, but not totally I have 3 more days of cephalexin to go. My insurance is all used up and I have limited funds. Do you have a suggistion as to the best way to go with this problem?