A 55-year-old woman has severe malocclusion, including linguoversion of the lower right 2nd bicuspid (Fig.1).  The lower left 2nd and 3rd molars (*) and the lower right 1st molars (M (mesial) and D (distal)) have been decayed into residual root.  The lower right 3rd molar is mesioangular. 

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Xin Wei, DDS, PhD, MS 1st edition 04/30/2017, last revision 01/13/2018