For patients who are not ready for aggressive treatments such as ablative skin rejuvenation, photodynamic therapy (PDT) is a milder option with results that are still more effective than non-ablative rejuvenation methods. PDT was originally approved to treat actinic keratosis, but off-label uses include treatment of malignant lesions of the skin such as superficial basal cell carcinoma and Bowenâs disease. Following treatment, clinicians also noted reversal of the signs of photo aging including improvement of dyspigmentation, skin texture, fine lines, and overall complexion. Since this discovery, PDT has been further developed for the purpose of photo rejuvenation.
PDT begins with topical application of a photosensitizer. The photosensitizer is absorbed and concentrated within premalignant and malignant cells to a greater extent than, non-damaged cells. A light source is used to activate the photosensitizer, creating reactive oxygen species (ROS) that selectively destroy the cells with higher photosensitizer concentration. While common light sources include intense pulsed light (IPL), light emitting diode (LED), and lasers, non-laser light sources can be used to cover large surface areas, such as the face, in less time. Discovering the 21st Century Fountain of Youth: A Discussion of the Effectiveness of Popular Anti-Aging Therapies: Christopher J Salgado, Charlotte E LaSenna, Rebecca Cissel, Xiaoyi Li, Catherine E Gordon, Andrea R Marcadis and Wrood Kassira
Last date updated on June, 2014