[article]
| Titre : |
Skin of african descent : biophysical and clinical characterization influence of age |
| Type de document : |
texte imprimé |
| Auteurs : |
Stéphane Diridollou, Auteur ; Frédéric Flament, Auteur ; Jean de Rigal, Auteur ; Bernard Querleux, Auteur ; Bertrand Piot, Auteur ; Felicia Dixon-Parks, Auteur ; Roland Bazin, Auteur |
| Année de publication : |
2013 |
| Article en page(s) : |
p. 93-99 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Dermatologie
Etude in vivo
Etudes cliniques
Etudes comparatives
Peau
Peau -- analyse
Peau noire
Vieillissement cutané
|
| Tags : |
Peau 'Afro-américain' Caucasien 'Propriétés biophysiques' 'Caractérisation clinique' Ethnicité Atlas Age |
| Index. décimale : |
668.5 Parfums et cosmétiques |
| Résumé : |
The Clinical and biophysical data on African skin, its specific features and effects of aging are rather sparse. Accordingly, we aimed to characterize skin of African descent (African American skin) versus Caucasian skin through biophysical and clinical investigations. Additionally, clinical changes in some skin features as a function of age are reported.
In a first study, in vivo biophysical experiments were performed on the skin of 130 African American and 80 Caucasian women aged 18 to 87 living in the U.S. They included determination of the skin microrelief, color and color evenness, sebaceous function, surface hydration, mechanical properties, and skin structures (epidermis, subepidermal non-echogenic band, dermal epidermal junction, papillary-dermis and dermis). A second study involved a larger cohort of 200 African American and Caucasian women, aged 18-87, who were split into twelve matched 5-year age groups, in order to record age-related changes. Standardized photographs of the face were taken, focusing on various skin features. These included eye bags, under eye wrinkles, crow's feet.
These studies revealed that most of these skin features are common to both the Caucasian and African American populations. Nevertheless, some features were more prominent in or specific to the African American population including
• thicker epidermis and dermal-epidermal junction,
• thicker papillary dermis,
• stronger mechanical properties,
• specific clinical signs such as less depth of vertical upper lip wrinkles and
• more hyperpigmetation as well as pig mentary growths.
Moreover, clinical results showed that expression lines and tissue sagging appear at a later age in this population.
In addition, African American and Caucasian atlases were developed that can be used as an objective tool to evaluate product effectiveness, compare as well as identify the best products, and support efficacy claims. |
| Note de contenu : |
- EXPERIMENTAL : Study 1 - Biophysical measurements - Color heterogeneity - Sebaceous function - Thickness of the dermal-epidermal junction and epidermis - Study 2 - Clinical
- RESULTS AND DISCUSSION : Biophysical measurements - Clinical evaluation |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18785 |
in IFSCC MAGAZINE > Vol. 16, N° 2 (04-05-06/2013) . - p. 93-99
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