Hi. I have a root canal that was done bad ten years ago. Since then, have never had any pain, swelling, or discomfort. However I always saw a dark area around the root when x-rays were taken for other reasons.

A few weeks ago I started to have tenderness in the area. Went to the Dentist and to the Endodontist. They told me I need a root canal. I wonder whether I was diagnosed OK; from what the doctors say, a root canal will be enough to get rid of the dark area on top of the tooth. However I wonder whether this has become a cyst. It would be great if you could take a look at the x-ray I attach and let me know what you think. I'm a male in my 40s.

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