Had a root canal done on my second upper pre-molar about 15 years ago. Several years ago the tooth started breaking off, and now I am left with just a small piece slightly over the gum. About 10 days ago a small piece fell off, and since then I have slight pain when I eat something cold or inhale. I used to have pain when I passed the tooth brush there, but this has gone away and I barely feel the brush there now. I am wondering what type of pain I am dealing with? I coincidentally ate hard pretzels in the days before it started and my husband had pain too after eating them. Can it be just a temporary inflamed gum? Should I have pain in a tooth with a root canal? What it causing it? Since it is getting better, can I hold off a surgical extraction of the tooth since in 15 days will be leaving for Italy for a month? Or should I expect the worst and get it removed for the fear of possibly ending up with unbearable plane when travelling or when vacationing in Italy? thanks!