In fact sinus perforation occurs with the 1.6 mm drill. Osteotomy increases by using Magic Drills sequentially (2.8 and 3.3 mm) at #4 and Magic expander (3.0 mm) and the same Magic Drills at #5 (Fig.3).  A 4x11 mm dummy IBS implant is placed with insertion torque of 45 Ncm at #4 with apparently intruding into the sinus (Fig.3).

More is Less Last Next Xin Wei, DDS, PhD, MS 1st edition 02/22/2017, last revision 09/01/2018