I have been told today that I have a large cyst at the top of the root on one of my front teeth. I have no pain but would like to kmow more about it as I might have to have surgery to remove it

This site may be of some help.

Addenbrooke's Hospital: Cambridge University Hospitals NHS Foundation Trust (http://www.addenbrookes.org.uk/serv/clin/surg/oral/cysts.html)