title: Comparative study on efficacy and safety of 1550 nm Er:Glass fractional laser and fractional radiofrequency microneedle device for facial atrophic acne scar.
abstract: BACKGROUND
  The 1550 nm Er:Glass fractional laser is widely used for the treatment of atrophic acne scar. A novel fractional radiofrequency microneedle device has recently emerged as an alternative for treating acne scars.
  
  
  OBJECTIVE
  To evaluate the clinical efficacy and safety of a Er:Glass fractional laser and fractional radiofrequency microneedle device in the treatment of facial atrophic acne scars and to assess the difference between the treatment modalities depending on facial compartment.
  
  
  METHODS
  A total of 40 patients were equally randomized into two groups. Each group of 20 patients received three treatments at 4-week interval using Er:Glass fractional laser or fractional radiofrequency microneedle device.
  
  
  RESULTS
  Scar severity scores (ECCA grading scale) improved by a mean of 25.0% and 18.6% in groups A and B, respectively (both P < 0.01). The difference in the degree of improvement was not statistically significant between the groups after three sessions of treatment. There were no significant side effects.
  
  
  CONCLUSIONS
  Atrophic acne scars improved in both groups without significant side effects. Additionally, the fractional laser was a more effective treatment option for acne scars, but the fractional radiofrequency microneedle device offered good adherence and short downtime.
authors: Department of Dermatology, Ulsan University Hospital, Ulsan, Korea.
authors: Woong Suk
authors: WS
authors: Chae
authors: Department of Dermatology, Ulsan University Hospital, Ulsan, Korea.
authors: Jun Young
authors: JY
authors: Seong
authors: Department of Dermatology, Ulsan University Hospital, Ulsan, Korea.
authors: Ha Na
authors: HN
authors: Jung
authors: Department of Dermatology, Ulsan University Hospital, Ulsan, Korea.
authors: Sook Hyun
authors: SH
authors: Kong
authors: Biomedical Research Center, Ulsan University Hospital, Ulsan, Korea.
authors: Min Ho
authors: MH
authors: Kim
authors: Department of Dermatology, Ulsan University Hospital, Ulsan, Korea.
authors: Ho Seok
authors: HS
authors: Suh
authors: Department of Dermatology, Ulsan University Hospital, Ulsan, Korea.
authors: Yu Sung
authors: YS
authors: Choi
mesh_terms: D000152:Acne Vulgaris / Q000150:complications* / Q000532:radiotherapy; D000328:Adult; D002921:Cicatrix / Q000209:etiology / Q000532:radiotherapy*; D005260:Female; D006801:Humans; D053844:Lasers, Solid-State / Q000009:adverse effects / Q000627:therapeutic use*; D028022:Low-Level Light Therapy / Q000009:adverse effects / Q000379:methods*; D008297:Male; D009339:Needles; D016896:Treatment Outcome; D055815:Young Adult
keywords: acne scar; fractional photothermolysis; radiofrequency