Dark Patches prevention
Protecting skin against ultraviolet radiation
With the arrival of summer it is important to consider the effects of ultraviolet radiation on the skin.
Just 15 minutes´ exposure to the sun can trigger the release of free radicals that cause oxidative damage to cell membranes and nuclear DNA. Initially these changes are subclinical, which means they are not visible to the eye. However, with repeated exposure the damage is cumulative and over the years can lead to the appearance of precancerous lesions such as actinic keratoses and malignant lesions such as basal cell carcinoma and squamous cell carcinoma.
These lesions clinically manifest themselves in the skin as red scaly patches, indurated plaques or ulcerations of the skin.
Over time these precancerous lesions, called actinic keratoses may develop into malignant tumors (squamous cell carcinoma).
Photodynamic therapy is a new treatment that can selectively treat these lesions.
The treatment involves applying a photosensitive cream, which is selectively absorbed by the atypical cells. These cells are then radiated with a red light source, triggering a photochemical reaction that results in the release of cytotoxic free radicals and activation of the body´s own immune system that together destroy the atypical cells.
Photodynamic therapy is also used for skin resurfacing, or rejuvenation.
Photodynamic rejuvenation therapy is a major advance in the treatment of skin aging. Not only does it stimulate collagen formation and improve the quality of the skin, it also treats subclinical and clinically visible precancerous lesions without the need for the patient to take time off work.
Photodynamic rejuvenation is indicated for patients who want to rejuvenate their skin and minimise the effects of chronic sun damage (wrinkles, uneven thinning of the epidermis, dyschromia or irregular changes in pigmentation, telangiectasias and actinic keratosis). Photodynamic therapy reduces fine wrinkles and improves tone and texture, resulting in rejuvenated skin.
Photodynamic therapy is also useful in the treatment of acne as it eradicates the Propionibacterium acnes bacterium that causes acne and has an anti-inflammatory effect on inflamed lesions.
Photodynamic therapy acts on dermal fibroblasts, increasing the replacement of sun damaged collagen. Likewise, the light improves vascularisation of the skin, resulting in better oxygenation and facilitating the elimination of toxins, leaving the skin smooth and radiant.
Photodynamic therapy´s ability to promote healing and repair also makes it effective in improving the appearance of scars.