A 51-year-old man has experienced pain and swelling in the lower right 2nd molar for 7 months (Fig.1, P: post in the mesial root; <: gutta percha inserted into a buccal fistula, pointing to the furca and the mesial root).

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Xin Wei, DDS, PhD, MS 1st edition 07/29/2013, last revision 02/09/2020