Fig.2: 1.5 mm pilot drill at the depth of 14 mm; it is close to the left lateral incisor. 

The trajectory of the osteotomy is intended to be changed with the same drill (Fig.3 red) without success (white, 17 mm deep).  With measurement and calculation, the 3x17 mm implant is not expected to touch the root of the adjoining tooth.

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Xin Wei, DDS, PhD, MS 1st edition 03/23/2013, last revision 08/11/2018