title: A double-blind, side-by-side comparison study of low fluence long pulse dye laser to coolant treatment for wrinkling of the cheeks.
abstract: BACKGROUND
  Nonablative laser resurfacing with various lasers and light sources can improve skin texture and fine lines. The 595 nm pulsed dye laser has been reported to improve rhytides through nonablative mechanisms, minimizing the side effects and recovery period associated with traditional ablative resurfacing techniques.
  
  
  OBJECTIVE
  The purpose of this study was to investigate the efficacy of the long pulse flashlamp pumped pulsed dye laser (LPDL) in improving rhytides and stimulating collagen synthesis and dermal remodeling.
  
  
  METHODS
  The cheeks of 15 women with moderate to severe photoaging were treated on one side with a series of four monthly LPDL treatments, while the contralateral cheek was treated with cryogen coolant only. Clinical grading was performed at monthly intervals for up to 3 months after the fourth LPDL treatment. Skin biopsy before treatment and at 4-6 weeks was also performed for histologic evaluation and staining for type I procollagen.
  
  
  RESULTS
  Eleven of 15 patients demonstrated improvement of the laser-treated cheek while only three of 15 patients the demonstrated improvement on the cryogen-treated cheek. A statistically significant (p = 0.0035) improvement in clinical grading of photodamage was noted in the treated side versus the control. In those patients who improved with LPDL treatment, an improvement of 18.1% in the mean pre- and post-treatment clinical grading scores was observed. Histologic evaluation demonstrated an increase in activated fibroblasts with positive procollagen staining on the LPDL-treated cheek.
  
  
  CONCLUSIONS
  The 595 nm LPDL may be used in the treatment of moderate to severe wrinkles. A mild improvement may be expected with minimal to no side effects.
authors: Dermatology Associates of San Diego County, CA, USA.
authors: E
authors: E
authors: Rostan
authors: L E
authors: LE
authors: Bowes
authors: S
authors: S
authors: Iyer
authors: R E
authors: RE
authors: Fitzpatrick
mesh_terms: D000328:Adult; D000368:Aged; D002610:Cheek / Q000601:surgery; D003452:Cryosurgery / Q000379:methods*; D062109:Dermatologic Surgical Procedures; D004311:Double-Blind Method; D005260:Female; D005347:Fibroblasts / Q000378:metabolism; D006801:Humans; D053685:Laser Therapy / Q000379:methods*; D008875:Middle Aged; D019651:Plastic Surgery Procedures / Q000379:methods*; D012867:Skin / Q000166:cytology; D015595:Skin Aging