| PHOTOTHERAPY | ARTICLE Key points
■ Stretch marks result from a combination of factors, but first and foremost, it is acknowledged that stretch marks are associated with a disease of fibroblasts that interrupts the production of collagen fibres and elastin in the furrows of the stretch marks
■ The photomomodulation LED has the effect of changing a number of cellular processes, particularly by stimulating fibroblast cells, allowing them to return to a normal metabolism and often a physiological neosynthesis of collagen and elastin, causing a gradual repair of the altered connective tissue
■ The other immediate effect of applying mild heat to bipolar radiofrequency is the migration and proliferation of the fibroblasts. The skin is quickly tightened, firmer and smoother
■ LED light therapy makes it possible to benefit from a new approach to skin treatments where complex subcellular enzymatic reactions can be positively influenced by the action of ballistic photons released by sophisticated LED configurations, which consistently show unquestionable efficacy in a number of medical and aesthetic treatments
knowledge) Chromospace, the dissemination of which
is still confidential ® it is difficult to uniformly irradiate all areas of the skin on all parts of the body. In this regard, PDT is likely to pave the way for a whole
range of new medical treatments, dermatological aesthetic and wellbeing, asserting itself as an excellent non-invasive technology with good development potential in the future. Finally, recent studies presented at the 2009
Conference on Lasers and Electro-Optics/International Quantum Electronics Conference, presented by a research team led by Aristide Dogariu, an optical scientist at the College of Optics and Photonics, and Kiminobu Sugaya, a stem cell researcher at the College of Medicine Burnett School of Biomedical Sciences in Florida, have shown for the first time that light energy can gently guide and change the orientation of living cells within lab cultures. That ability to optically steer cells could be a major step in harnessing the healing power of stem cells and guiding them to areas of the body that need ÔhelpÕ . This discovery allows for the synthesis of a number of very promising trends.
Repigmentation of stretch marks In some cases, primarily regarding dark skin, it is possible to obtain a nearly perfect result in skin reconstruction, but the colour of stretch mark scars is
not sufficiently progressed to unify the pigmentation. This problem lies with the functioning of melanocytes. The number of melanocytes varies according to the skin of an individual. Thus, their density may be 2000 mm2
for the skin of the face and 1000 mm2
for the In some cases, primarily
regarding dark skin, it is possible to obtain a nearly perfect result in skin reconstruction, but the colour of stretch mark scars is not sufficiently progressed to unify the pigmentation.
body. On the other hand, as their number is appreciably identical in all human populations, the colour difference can be explained partly by the location, quality and quantity of the pigments these cells produce. People with dark skin have a denser melanin content, the melanosomes of which remain isolated throughout the cycle of maturation. In contrast, the melanosomes of Caucasian patients are associated in vesicles bound by a membrane. Therefore, every melanocyte contains five- times more melanosomes compared with an Asian patient, and 8–10-times more melanosomes compared with a black patient. Sun exposure stimulates
melanogenesis and an increase in the number of melanocytes either by differentiation of quiescent melanoblasts, or by cell division of mature cells. It is therefore necessary to reasonably expose all skin types to sunlight. A variety of research studies are currently in progress,
especially within the framework of vitiligo, a similar problem with regard to the colour of stretch marks, to boost melanogenesis with short UVB (311 nm).
Figure 6 Patient six (A) before and (B) after treatment
prime-journal.com | March 2012
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