However , mean cortical healing indexes ( anterior/posterior/medial / lateral ) were 1.14 / 0.81 / 0.96 / 0.88 months/cm in the treatment group and 1.47 / 1.26 / 1.42 / 1.22 months/cm in the control group ( all p < 0.001 ) , showing faster healing in the treatment group at each cortex .