Two of 5x8.5 mm implants are placed at #2 and 3 with sinus lift using water ballooning technique; to avoid invading the neighboring root tips, an intraop PA is taken with a 2.2x11.5 mm drill at #5 (Fig.1). 

Thickened Sinus Membrane Last Next

Xin Wei, DDS, PhD, MS 1st edition 06/18/2019, last revision 06/18/2019