A 675 nm Laser in the Treatment of Facial Melasma in Dark Skin Types.

Background: Melasma therapy can be difficult and requires employing different treatment approaches. Laser therapy is a good alternative for treating melasma, especially for patients with refractory cases. Objective: To evaluate the efficacy and safety of newcomer wavelength 675 nm diode laser in treating melasma in darker skin types. Methods: Nineteen female patients with facial melasma were recruited. They received four sessions of 675 nm laser at one-month intervals using the following parameters: power 5-6 W, pulse duration 100-150 ms, spacing 2000 mm, and stack one up to 4 passes. One month after the last treatment session, the evaluation was done subjectively through the modified melasma area and severity index (mMASI) score and objectively using the Antera 3D camera. Results: After treatment, there was a highly statistically significant reduction in mMASI scores. In addition, the scores on the Antera camera recorded highly statistically significant differences in the treated areas' melanin and hemoglobin average levels. Conclusion: The novel 675 nm laser represents a safe and efficient approach in treating melasma in darker phototype patients.