Background and Objective: Laser hair removal is a relatively new procedure.
Our purpose was to study the efficacy and safety of a high-power, pulsed d
iode laser array for removing unwanted hair.
Methods: A total of 38 subjects were treated with a prototype of the 800-nm
diode laser system. Fluences ranging from 10 to 40 J/cm(2) (mean, 33.4 J/c
m(2)) were used and 1 to 4 treatments (mean, 2.7) were performed. Evaluatio
n of hair loss was performed at least 4 months after the last treatment (me
an, 8.7 months) by a blinded assessment of clinical photographs.
Results: A total of 59% of the subjects had only sparse hair regrowth at th
e final follow-up. Higher fluences and multiple treatments produced greater
long-term efficacy Transient pigmentary changes occurred in 29% of the sub
jects and were more common in darker skin types IV to VI (P = .047).
Conclusion: The 800-nm diode laser is an efficient and safe technique for h
air reduction. Adverse pigmentary effects occur, but are transient.