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Fig.4 (panoramic X-ray taken on May 23, 2017) shows enlarged periradicular radiolucency. The apex of the tooth #20 is not as close to the Mental Loop as PAs shown. The root fracture appears to cut gutta percha into 2 segments.
Xin Wei, DDS, PhD, MS 1st edition 06/29/2017, last revision 06/29/2017