can anyone explain the follwoing. I had no problem at all with my temporary crown on the tooth for almost a month while waiting for the perm. crown. But with the permamant crown, I have mild cold and hot sensitivity issues and gum line irritation?? it is a week and my discomfort has not getten any better. I did not need any root canal before either and I went for a crown due to a minor crack in the tooth. any idea???