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After osteotomy with guide and 2.2 mm drill for ~ 4 mm at #14, a bone expander (1.3/2.3 mm) is used free hand for sinus lift for 12 mm (from the gingival margin, Fig.1; a 10 mm long implant is planned).
Xin Wei, DDS, PhD, MS 1st edition 01/22/2019, last revision 01/23/2019