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Lindamann bur is adopted to move the osteotomy buccal. The last drill (3 mm for 3.5 mm implant) has no resistance when it enters the buccalized osteotomy. A longer implant than designed is placed (3.5x13 mm, Fig.2,3, close to the sinus floor (dashed yellow line) with 50 Ncm.
Xin Wei, DDS, PhD, MS 1st edition 12/14/2018, last revision 03/22/2020