The last drill will be undersized in diameter (3.0x10.0 instead of 3.5x10.0) to compensate for oversized cortical drill (4.0). Use 3.0x11.5 mm drill if necessary for 4x11 mm FC implant.
Xin Wei, DDS, PhD, MS 1st edition 01/27/2020, last revision 01/27/2020