Treatment of Acne Scars on Darker Skin Types Using a Noninsulated Smooth Motion, Electronically Controlled Radiofrequency Microneedles Treatment System

Dermatol Surg. 2017 Jan;43 Suppl 1:S64-S69. doi: 10.1097/DSS.0000000000000894.


Background: Noninvasive technologies for treating acne scars use radiofrequency (RF)-emitting microneedles for both mechanical disruption of fibrotic strands and heat-mediated collagen remodeling.

Objective: Efficacy and safety evaluation of electronically controlled noninsulated RF microneedling system on acne scars in patients with dark skin.

Methods: Nineteen patients, 24 to 51 years old, skin types III to V, with acne scars were enrolled in the study. Each patient had 3 treatment sessions at monthly intervals using a multisource RF treatment platform with a microneedle RF applicator. Efficacy was evaluated by the Goodman and Barron's Global Qualitative Acne Scarring System.

Results: No bleeding points occurred during treatments. Post-treatment erythema was observed immediately after the treatment and lasted up to 10 hours after the treatment. Improvement of at least 1 acne scar grade was noted in 11 of 19 patients (57.9%) after 1 month and in 9 of 9 patients (100%) after 3 months.

Conclusion: The tested noninsulated electronically controlled RF microneedles were found to be safe and efficient in the treatment of atrophic acne scars in skin types III to V with minimal pain or downtime.

MeSH terms

  • Acne Vulgaris / complications*
  • Adult
  • Cicatrix / etiology
  • Cicatrix / physiopathology
  • Cicatrix / therapy*
  • Collagen / physiology
  • Cosmetic Techniques / instrumentation*
  • Female
  • Fibrosis / physiopathology
  • Humans
  • Male
  • Middle Aged
  • Needles*
  • Radiofrequency Therapy*
  • Skin Pigmentation*
  • Young Adult


  • Collagen