Skin premature aging induced by tobacco smoking: the objective evidence of skin replica analysis.
Epidemiological studies have showed that heavy smoking causes premature skin aging. Using a silicone rubber replica combined with computerized image processing, an objective measurement of skin's topography, we investigated the association between wrinkle formation and tobacco smoking in this study. The replica analysis was used to study the changes in the surface furrows of the volar forearm in 63 volunteers. Results confirmed that the depth (Rz) and variance (Rv) of furrows were increased and lines of furrows (Rl) were decreased with age. The replica analytic results showed that Rz and Rv in subjects with a smoking history > or =35 pack-years were significantly higher than non-smokers (P<0.05). Rl in subjects with a smoking history were significantly lower than non-smokers (P<0.05). In addition, the present results gave a good correlation between the parameters from the computerized replica analysis with the clinical grading assessment of wrinkles, which further confirmed that skin replica technique is an objective and efficacious tool in evaluation of skin premature aging.