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Tooth sensitive to heat after root canal?

I had a root canal done on #15 approx 10 months ago.  For the past couple of weeks this tooth is very sensitive to heat. I have noticed a deep pocket at the gum line that I may have missed with flossing and am now trying to correct with being more careful and using a dental brush to get in there to make sure it's really cleaned out.
Could this be the cause for the senitivity in this tooth that has already had a root canal?  It is definitly this tooth.  This is the only symptom......Thanks
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COMMUNITY LEADER
Seeing an endodontist and periodontist is advised.Occasionally, incimplete canal obturation may result in heat sensitivity.
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Avatar universal
Oops.  It's #2 tooth not #15......
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