Safety and Efficacy of the 4MD Micro Needling Device in the Treatment of Acne Scars

All patients were treated with a 16 needle, 3mm, 33-gauge surgical grade stainless steel needle cartridge. The operator began treatment using a depth of (1mm) and a frequency setting of 4 (corresponding to 120 Hz). Needle depth and frequency was adjusted until pin-point bleeding occured, the minimum and maximum depth used to create pinpoint bleeding was recorded. The operator began treatment using a minimum depth of 1mm and a frequency setting of 4 (corresponding to 120 Hz). Needle depth and frequency was adjusted until pin-point bleeding occurred.