Osteotomy is initiated by 2 mm pilot drill (white box) 4 mm from the neighboring tooth (Fig.5); the depth is 8 mm.  The depth of the osteotomy is adjusted according to X-ray taken with a parallel pin.  Sinus lift may be needed (dashed line: sinus floor). 

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Xin Wei, DDS, PhD, MS 1st edition 04/06/2013, last revision 01/19/2018