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Osteotomy at the site of #3 turns out to be easy, starting with 2 mm initial drill, 2.8 and 3.6 mm round drills at 5 mm. The depth intends to increase to 6 mm, in fact to 9 mm (using wrong stopper with the same colored ring as 6 mm one) fortunately without sinus membrane perforation. The osteotomy continues to increase by using 4, 4.5, 5, 5.3 and 5.9 mm taps at 6 mm deep. Allograft/Osteogen is placed for sinus lift prior to inserting a 5.9x6 mm SM implant (>50 Ncm, Fig.1).
Xin Wei, DDS, PhD, MS 1st edition 06/23/2016, last revision 06/23/2016