Background Although several lasers meet the wavelength criteria for selective follicular
destruction, the treatment of darker skin phototypes is particularly challenging
because absorption of laser energy by the targeted hairs is compromised by
an increased concentration of epidermal melanin.
Objectives To compare satisfaction level, safety and effectiveness of a long-pulsed
Nd:YAG laser and intense pulsed light (IPL) in axillary hair reduction in subjects
with dark skin.
Methods The study design was a within-patient, right-left, assessor-blinded, comparison
of long-pulsed Nd:YAG laser and IPL. Fifty women (skin phototypes
IV–VI) volunteered for removal of axillary hair. Five sessions at 4- to 6-week
intervals were performed. Hair counts at both sides were compared at baseline
and 6 months after the last session. Final overall evaluations were performed by
subjects and clinician at the end of the study. Satisfaction was scored for both
devices.
Results Thirty-nine women completed the study. At 6 months, the decrease in hair
counts on the laser side (79Æ4%, P < 0Æ001 vs. pretreatment) was significantly
(P < 0Æ01) greater than that on the IPL side (54Æ4%, P < 0Æ01 vs. pretreatment).
Only temporary adverse effects were reported at both sides. Higher pain scores
and more inflammation were reported with Nd:YAG laser; however, it was preferred
by 29 volunteers (74%). Volunteers reported higher satisfaction score with
Nd:YAG laser (P < 0Æ01).
Conclusions Dark skin can be treated by both systems safely and effectively; however,
long-pulsed (1064 nm) Nd:YAG laser is more effective as reported by both
subjects and clinician.