A 59-year-old man returns from endodontist office with diagnosis of "root fracture" of #19 (Fig.1).  Y: years post cementation.   In fact the abutment at #18 is incompletely seated and should be reseated once #19 is extracted.

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Xin Wei, DDS, PhD, MS 1st edition 03/11/2020, last revision 06/11/2021