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After osteotomy with guide at #14 (4.5x7.3 mm last drill with 1 O-ring/10.5 mm offset for bone-level implant), a 5x11 mm tissue-level tap is used with allograft for sinus lift (Fig.1).
Xin Wei, DDS, PhD, MS 1st edition 04/22/2019, last revision 04/22/2019