Six months later, PRRL at #1 is enlarged (Fig.2 *) with palatal gingival recession, pockets and BOP.  The tooth is extracted; its palatal plate is lost, which is consistent with CT taken ~ 1 year earlier (Fig.3). 

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Xin Wei, DDS, PhD, MS 1st edition 12/30/2019, last revision 01/01/2020