Chan, 2000 Dermatol Surg 2001 Nov;27(11):950-954 Related Articles,
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An In Vivo Study Comparing the Efficacy and Complications of Diode
Laser and Long-Pulsed Nd:YAG Laser in Hair Removal in Chinese
Patients.
Chan HH, Ying SY, Ho WS, Wong DS, Lam LK.
Division of Dermatology, Department of Medicine, University of
Hong Kong, Department of Plastic and Reconstructive Surgery, Prince
of Wales Hospital, and Division of Plastic and Reconstructive
Surgery,Department of Surgery, Queen Mary Hospital, Hong Kong.
BACKGROUND: Lasers with long wavelengths are less
well absorbed by melanin and are considered to be particularly
suitable for hair removal in dark-skinned patients.
OBJECTIVE: To compare the efficacy and complications
of 800 nm diode and long-pulsed 1064 nm Nd:YAG lasers in laser-assisted
hair removal in Chinese patients.
METHODS: Fifteen women had hair removal treatments
(13 axillae and 2 legs) with diode laser on one side and Nd:YAG
laser on the other. They were followed up for 36 weeks. Subjective
assessments included the degree of immediate pain and the degree
of hair regrowth. Clinical photographs were taken for evaluation
by two independent observers to assess complications and the degree
of hair regrowth.
RESULTS: Long-pulsed Nd:YAG laser was found to be
significantly associated with a greater degree of immediate pain
after laser surgery (P =.0001, independent sample t-test) and
also had a longer laser time (P =.0001, independent sample t-test).
Besides transit adverse effects such as erythema and perifollicular
edema, only one patient developed hypopigmentation at week 6 which
resolved by week 36. Although regrowth rates were low at week
6 (subjective rates were 23% and 19% for Nd:YAG and diode laser,
respectively), most patients had significant regrowth at week
36 (subjective regrowth rate 91% for both long-pulsed Nd:YAG and
diode lasers).
CONCLUSION: Diode 800 nm and Nd:YAG 1064 nm lasers
are safe in laser-assisted hair removal in Chinese patients, and
besides immediate pain, there was no other significant adverse
effect. Most patients experienced regrowth 36 weeks after a single
treatment. Further study is necessary to determine the long-term
clinical efficacy and complications of laser-assisted hair removal
with these systems in dark-skinned patients.
PMID: 11737129 [PubMed - as supplied by publisher]
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