Comparative study of the efficacy of fractional Er: YAG 2940 nm laser and Q-switched Nd: YAG 1064 nm laser in keratosis pilaris.

Abstract

Keratosis pilaris is a common keratinization disorder of the extensor surfaces of the proximal extremities. Various treatment modalities reduce symptoms, but their efficacy is limited. The aim of this study is to compare the efficiency of Q-Switched Nd: YAG laser and fractional Er: YAG laser. The lesions in both arms were randomly divided into areas A and B. Fractional Er: YAG 2940 nm laser performed to area A 1.5J/cm2 , spot size 7 mm, frequency 3Hz and three passes and Q-Switched Nd: YAG 1064 nm laser performed to Area B, 4-6J/cm2 spot size 4 mm, 8Hz frequency, and as a single pass. Both lasers were performed in 4 sessions at 3-week intervals. The global improvement scale evaluated treatment responses in dyspigmentation and skin texture. Twenty patients completed the study, and the mean age of a total of 20 patients was 22.9. There was no significant difference in dyspigmentation and skin texture with global improvement scale between Area A and Area B, respectively (p=0.078, p=0.638). In addition, there was no significant difference between patient satisfaction levels after treatment in Area A and Area B (p=0.868). The efficiency of the fractional Er: YAG 2940 nm laser was found equal to the Q-switched Nd: YAG 1064 nm laser. Fractional Er: YAG 2940 nm laser may be a new treatment option in the treatment of keratosis pilaris.