Since the mesiodistal width of the 1st molar is less than 10 mm (Fig.8), the center of the osteotomy at the site of #2 should be 4.5 mm (3.5 mm from the 2 mm pilot drill).  If the bone allows, 5.3x12 mm bone-level implant will be placed.

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