Photodynamic Therapy
Benefit from the use of light is known since ancient time, but, only in the last decades of twentieth century, we witnessed the rapid expansion of knowledge and techniques. (LED)-based devices represent the emerging and safest tool for treatment of many conditions such as skin inflammatory conditions, aging, and disorders linked to hair growth. The present work reviews the current knowledge about LED-based therapeutic approaches in different skin and hair disorders.
LED therapy represents the emerging and safest tool for the treatment of many conditions such as skin inflammatory conditions,aging, and disorders linked to hair growth. The use of LED in the treatment of such conditions has now entered common practice among dermatologists.
Red light (630-700nm) is able to reach the dermis activating fibroblasts, increasing fibroblast growth factor expression as type 1 pro-collagen and matrix metalloproteinase. Studies suggest both blue and red light statistically significant inhibitory effect of sebum production.
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Blue light (400-470nm) has a lower potential for penetration and reveals useful for skin conditions in the epidermis layer of the skin. Blue light showed a significant effect in acne treatment acting in a dose-dependant manner in reducing human sebocyte proliferation.
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Yellow light (540nm) is effective in skin conditions involving redness, swelling, and other effects related to pigmentation.
Different cells and tissues absorb light at different wave lengths, and this is strictly related to the penetration that the wavelengths have to achieve. Many studies showed the ability of LED therapy to trigger skin collagen synthesis and to reduce MMP expression.
Photodynamic therapy is included in most facial treatments, With its vast amount of benefits and minimum contradictions this treatment is suitable for most clients.