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After regional ridge reduction (Fig.2) and use of 2 mm pilot drill for 8.5 mm, the depth is actually ~ 10 mm. After sequential osteotomy until 4.3x10 mm drill, the osteotomy is in fact 11.5 mm deep; a 5x11.5 mm implant is placed with <35 Ncm (Fig.3).
Xin Wei, DDS, PhD, MS 1st edition 01/30/2017, last revision 01/30/2017