Comparative study in treatment of acne scars fractional carbon dioxide laser versus micro needling fractional radio frequency – A retrospective study

There was no difference in the last session (after the treatment) between the groups, the Mann- Whitney U-test was 109.5 with <i>P</i>-value of 0.484 >0.05. Therefore, there was no statistically significant difference between the microfractional radiofrequency and carbon dioxide laser group. There were 2 (12.5%) cases reported with post-inflammatory hyperpigmentation in the CO₂ laser group and zero cases in the microfractional radiofrequency group.