Unexpected distribution of surface hydration level of the lip.
BACKGROUND
The functional properties of human lips depend on their hydration level. Limited data are, however, available.


OBJECTIVE
To investigate water distribution through the lower lip surface.


METHODS
Images from the surface of the lip were recorded using a new capacitance imaging technique. Capacitance and conductance measurements were also carried out in various points of lower lip and on adjacent skin.


RESULTS
Data clearly show that the closest part of the mucosa of the lip is less hydrated than the external part. These unexpected findings could be related to the presence of a premucosa area whose structure is clearly different from that of vermilion zone.
Caisey
L
L
L'Oréal Recherche, Chevilly Larue, France.
Gubanova
E
E
Baras
D
D
Lévêque
J L
JL
D000328:Adult; D005260:Female; D006801:Humans; D008046:Lip / Q000737:chemistry*; D008875:Middle Aged; D014867:Water / Q000737:chemistry*
D014867:Water