The initial osteotomy is established in the palatal slope at #6 (Fig.5 circle) with 1.5 mm drill (Fig.6).  A portion of the root is visible (arrowheads).  A 1.2 mm drill is at the site of #7.

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Xin Wei, DDS, PhD, MS 1st edition 01/06/2017, last revision 03/04/2020