To obtain higher primary stability without microfacturing the cortical plate, use one size smaller drill for the cancellous bone (Fig.5 white line, as compared to Fig.4 green line); the last drill barely touches the coronal portion of the osteotomy (Fig.5 red line).

Differential Osteotomy for Cortex and Medulla

Xin Wei, DDS, PhD, MS 1st edition 08/16/2015, last revision 08/16/2015