We read with interest the study of Khatri et al1 comparing an erbium:YAG (Er:YAG) and a carbon dioxide (CO2) laser in resurfacing facial rhytides. The results of this study are supported by our own treatment results published in 1998,2 presenting a direct comparison of Er:YAG laser treatment on one side of the face with CO2 laser treatment (continuous-wave CO2 flash scanning device) on the other. Preliminary results after a relatively short follow-up period of 8 weeks showed excellent wrinkle improvement in 8 (73%) and medium improvement in 3 (27%) of the CO2 laser–treated sides, whereas the Er:YAG laser–treated sides showed only a slight improvement in 4 (57%) and a medium improvement in 3 sides (43%).
Hohenleutner S, Hohenleutner U, Landthaler M. Comparison of Erbium:YAG and Carbon Dioxide Laser for the Treatment of Facial Rhytides. Arch Dermatol. 1999;135(11):1416-a-1417. doi:10-1001/pubs.Arch Dermatol.-ISSN-0003-987x-135-11-dlt1199