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Upon opening the tooth, we found a supraboney perforation on the ML surface.
Canals were located using a operating microscope and the root canal completed.
The ML perforation was repaired using Geristore. (Since this perforation was above the crestal bone, a restorative material that would not wash out must be used. MTA is not the best material in this type of perforation)
A six month recall finds the lesions almost completely healed and the tooth pain free and functional.