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After #29 root extraction, osteotomy starts in the lower 1/3 of the lingual socket wall (Fig.4' red arrow). Once the pilot drill enters the lamina dura, the trajectory will change to the axis of the tooth (Fig.4).
Osteotomy sequence: 2 and 2.5x14/15 from gingival margin, 3x11/2, then place implant. 3.5x8 drill if necessary. Drills lean as lingual as possible.
Xin Wei, DDS, PhD, MS 1st edition 03/15/2015, last revision 03/15/2015