title: Photo-epilation results of axillary hair in dark-skinned patients by intense pulsed light: comparison between different wavelengths and pulse width.
abstract: BACKGROUND
  Recently, intense pulsed light (IPL) sources have been shown to provide long-term hair removal.
  
  
  OBJECTIVE
  This study examined the photo-epilatory effects of different wavelengths and pulse width application in the same IPL device and compared their efficiencies in Asian skin.
  
  
  METHODS
  Twenty-eight Korean women were treated using hair removal (HR) (600-950 nm filter) and 27 using HR-D (645-950 nm filter) in the axillary area. Four treatments were carried out at intervals of 4 to 6 weeks; follow-ups were conducted 8 months after the last treatment. Mean energy settings were 14.9 6 2.0 J/cm2 for HR and 17.1 6 0.6 J/cm2 for HR-D. Longer pulse widths were applied in case of HR-D treatment. Hair counts and photographic evaluation of skin sites were made at baseline and at the last follow-up. Final overall evaluations were performed by patients and clinicians.
  
  
  RESULTS
  Average clearances of 52.8% and 83.4% were achieved by HR and HR-D, respectively. No significant adverse effects were reported after HR-D treatment. One case each of hypopigmentation and hyperpigmentation was reported for HR.
  
  
  CONCLUSIONS
  An IPL source removing 45 nm of the emitted spectra and applying a longer pulse width was found to provide a safer and more effective means of photo-epilation in Asian patients.
authors.affiliation: Department of Dermatology, College of Medicine, Seoul National University, Seoul, Korea.
authors.forename: Jong
authors.initials: J
authors.lastname: Hee Lee
authors.forename: Chang Hun
authors.initials: CH
authors.lastname: Huh
authors.forename: Ho Joon
authors.initials: HJ
authors.lastname: Yoon
authors.forename: Kwang Hyun
authors.initials: KH
authors.lastname: Cho
authors.forename: Jin Ho
authors.initials: JH
authors.lastname: Chung
mesh_terms: D000328:Adult; D044466:Asian People; D001365:Axilla; D005260:Female; D006197:Hair / Q000528:radiation effects*; D006204:Hair Removal / Q000379:methods*; D006801:Humans; D008875:Middle Aged; D010789:Phototherapy / Q000379:methods*; D012880:Skin Pigmentation / Q000528:radiation effects*; D016896:Treatment Outcome