A 47-year-old man, a possible bruxer (Fig.1), is concerned about the mobile 2nd molar and lower central incisor (Fig.2,3).  The distal apex of the tooth #30 is in the large periapical radiolucency.  There is history of #32 extraction.

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Xin Wei, DDS, PhD, MS 1st edition 12/25/2019, last revision 12/29/2019