After extraction, the socket is treated with 2% Xylocaine/1:50,000 Epinephrine.  The coronal distobuccal plate is defective.  Osteotomy is initiated as lingual as possible.  The 1st intraop PA shows that the osteotomy is shallow and distal to the almost non-existent septum (Fig.2 S).  The osteotomy is intended to move more mesially, but the result is not obvious when 4.5x14 mm drill is in place (Fig.3 D).

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Xin Wei, DDS, PhD, MS 1st edition 11/30/2015, last revision 11/09/2018