Abstract
We have reported that the absorption and permeance of Nd-YAG laser varied depending on the color of the irradiated substances, and that the reflection ratio of Nd-YAG laser in black was measured by use of a computerized spectrometer to be 14% whereas that in other colors very high. Therefore, we considered that the lesion of melanin pigmented and non-melanin pigmented skin diseases could absorb and/or permeate lower level of Nd-YAG laser when stained in “black” than when not stained. Clinical application of Nd-YAG laser was performed on cases of milium, acne, granuloma telangiectaticum, keratosis, verruca, etc. Since no anesthesia was necessary in most of the cases and the procedure was very simple, the method was applicable to even the infants and gravida. Little scar formation was observed and beneficial clinical effects were obtained.
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