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A 50-year-old man had occasional discomfort of the tooth #19 3 year ago (Fig.1).
The mesial (M) root of the tooth #18 appears to be resorbed (asymptomatic).
Yellow dashed line: the upper border of the Inferior Alveolar Canal; pink dashed line: the Mental Loop.
Xin Wei, DDS, PhD, MS 1st edition 03/25/2015, last revision 03/26/2015