Laser hair removal Scientific principles and practical aspects

Laser hair removal Scientific principles and practical aspects
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HAIR LOSS AND REGROWTH
One hundred patients were treated in a clinical study with the high-power, pulsed diode laser. The study evaluated different combinations of fluence and pulse width in eight test sites. The patients were followed-up at one, three, six, nine, and 12 months following the last treatment. Ninety-two patients completed the study. Hair loss was assessed from hair counts using digital photographs before treatment and at each follow-up visit. Tattoos identified the location of each test site. The study showed that the high-power diode laser induces two separate effects: temporary hair loss and permanent hair reduction. Temporary hair loss occurs in all patients, for all hair colors and at all laser fluences. It usually lasts from one to three months.