Comparison of Nonablative Fractional Erbium Laser 1,340 nm and Microneedling for the Treatment of Atrophic Acne Scars: A Randomized Clinical Trial

Published in Dermatologic Surgery, February 2016, Volume 42, Issue 2, pages 232-241. doi: 10.1097/DSS.0000000000000597.

Authors: Cachafeiro T, Escobar G, Maldonado G, Cestari T, Corleta O.

Abstract

Background

The efficacy and safety of nonablative fractional laser for acne scar treatment has been described in several studies. Recently, microneedling treatment has been showing promising results with lower costs, quick healing time, and low risk of postinflammatory hyperpigmentation (PIH).

Objective

The effectiveness and safety of nonablative fractional erbium laser 1,340 nm and microneedling were compared for the treatment of facial atrophic acne scars.

Methods

Forty-six patients with atrophic facial acne scars were randomized to microneedling and laser groups, each receiving three sessions performed monthly. Two blinded dermatologists applied the validated Quantitative Global Grading System for Postacne Scarring scale before treatment, two months after treatment, and six months after treatment. Side effects were recorded during each follow-up visit and patient satisfaction was evaluated.

Results

Both groups showed significant improvement, and no statistically significant difference was observed between the results of the two therapies (p = .264). Erythema following each session persisted longer in the laser group, and 13.6% of subjects in that group experienced PIH. No PIH was observed in the microneedling group.

Conclusion

This study indicates that both nonablative fractional laser 1,340 nm and microneedling are comparable and effective in the treatment of atrophic acne scars. Microneedling is well tolerated, with fewer side effects and lower downtime.