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- Title
A long-term evaluation of erythema and pigmentation induced by ultraviolet radiations of different wavelengths.
- Authors
Suh, K.-S.; Roh, H.-J.; Choi, S.-Y.; Jeon, Y.-S.; Doh, K.-S.; Bae, J.-H.; Kim, S.-T.
- Abstract
Background/aims: The long-term reactions of human skin by different ultraviolet (UV)-wavebands were not reported. This study was to investigate a time course of erythema and pigmentation induced by UVA-1, broadband UVA (BBUVA), narrowband UVB (NBUVB) and broadband UVB (BBUVB). Methods: Ten volunteers participated in this study for 6 months. Four skin areas, from the back of each subject, were irradiated with two minimal erythema dose (MED) of four different UV wavelengths corresponding to UVA-1, BBUVA, NBUVB and BBUVB. Results: For both UVA-1 and BBUVA, erythema and pigmentation were most pronounced immediately and 1 h after exposure. Erythema rapidly diminished but pigmentation persisted throughout the study. For both NBUVB and BBUVB, test areas reacted with erythema of maximum intensity at 1 and 2 days, respectively. A maximum tanning was reached at 3–6 days for NBUVB and 4–7 days for BBUVB, and the return toward the original point was at 1 and 3 months, respectively. Conclusion: Two MED of UVA produced far prolonged erythema and pigmentation than UVB. For UVA, UVA-1 and BBUVA showed similar intensity and time course of skin reaction. For UVB, erythema and pigmentation produced by NBUVB were milder in intensity and shorter in a time course than those by BBUVB.
- Subjects
HUMAN skin color; ERYTHEMA; ULTRAVIOLET radiation; PHYSICAL anthropology; CUTANEOUS manifestations of general diseases
- Publication
Skin Research & Technology, 2007, Vol 13, Issue 4, p360
- ISSN
0909-752X
- Publication type
Article
- DOI
10.1111/j.1600-0846.2007.00238.x