Fractional 1064 nm Nd: YAG picosecond lasers for the treatment of traumatic scars: a retrospective study.

Traumatic scars negatively impact the patient's quality of life. Fractional 1064 nm Nd: YAG picosecond laser improves scars. However, the effect varies among individuals. This study aimed to evaluate the treatment of traumatic scars with fractional 1064 nm Nd: YAG picosecond lasers and the factors associated with its prognostication. We conducted a retrospective study with 161 patients with traumatic scars. All scars were treated using fractional 1064 nm Nd: YAG picosecond lasers. Efficacy was determined based on blinded visual evaluation using the Manchester Scar Scale (MSS) and 5-point Global Assessment Scale (GAS). The mean MSS values before and after treatments was 17.4 ± 2.7 and 13.6 ± 2.6 (P < 0.001), respectively. Color, radiance, contour, and distortion of the traumatic scars improved. (all P < 0.001). The course, location, and height of the scars, and the number of treatments and energy densities, were related to treatment responses (P < 0.05). Fractional 1064 nm Nd: YAG picosecond laser is effective for treating traumatic scars. Clinicians can predict the prognosis using multiple factors.