Fractional Laser for Depigmentation

I previously introduced the principles and uses of fractional laser technology. You now know that fractional laser is effective in improving skin problems such as fine lines, pores, and uneven texture. However, most people, even beauticians, may not have heard of fractional laser treatment for pigmentation. Here, I will discuss this with you.

Previously, there was no specific laser wavelength for removing pigmentation, and doctors would use traditional carbon dioxide lasers. The idea was to remove the entire epidermis (including pigmented spots) so that new skin without pigmentation would grow. However, this method had significant side effects. If it was done too deeply, it could cause the risk of post-inflammatory hyperpigmentation and scarring. Later, wavelengths were developed specifically to treat pigmentation, such as 532nm, 585nm, 694nm, 755nm, and 1064nm, and carbon dioxide lasers were no longer used for pigmentation.

Since the advent of fractional laser technology, researchers have been studying its effectiveness in treating pigmentation. The principle is simple: the wavelength of the fractional laser can non-selectively remove all target tissues, including melanin. Metabolism will then remove the tissues containing melanin fragments from the epidermis. This non-selective laser not only reduces superficial pigmentation (such as freckles) but also has a significant effect on deep pigmentation (such as melasma). For example, studies have shown that using a wavelength of 1550nm can improve uneven skin tone, fine lines, and rough texture. Therefore, fractional lasers are usually not only used for pigmentation but also for improving overall skin problems. In recent studies, the 1927nm wavelength in the Fraxel® Dual has also been shown to be effective in treating melasma. Of course, since the name is “fractional laser,” treatment must be done in segments, and the results are not immediately visible.

There are many methods for treating pigmentation, so it is best to consult a doctor to find out which method is suitable for you.