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. Author manuscript; available in PMC: 2013 Jun 1.
Published in final edited form as: J Cosmet Dermatol. 2012 Jun;11(2):122–130. doi: 10.1111/j.1473-2165.2012.00606.x

Table II.

Quantitative analysis of collagen (newly synthesized and types I, III and VII), elastin and tropoelastin before and after Erbium: YAG 2940 nm mini-peels.

(n = 6) Percent dermis positive
(Mean ± SD)		 P-value
Base line End of
treatment		 3 Months
post
treatment		 Base line
vs
End of
treatment		 End of
treatment
vs
3 Months
post
treatment		 Base line
vs
3 Months
post
treatment
Epidermal
Thickness (μm)		 54.3 ± 6.3 63 ± 6.5 66.4 ± 5.1 0.042* 0.340 0.005*
Collagen I 64 ± 4.5 71.1 ± 3.9 69.7 ± 4.4 0.044* 0.685 0.158
Collagen III 59.7 ± 2.1 62.9 ± 1.1 60.7 ± 2.6 0.037* 0.178 0.619
Collagen VII 8.4 ± 1.4 11.7 ± 1.5 10.8 ± 2.1 0.004* 0.264 0.010*
Newly
synthesized
collagen		 11.3 ± 2.1 16.1 ± 3.8 13.7 ± 1.5 0.001* 0.197 0.117
Total elastin 68.2 ± 7.8 56.5 ± 4.5 59.8 ± 6.1 0.025* 0.316 0.107
Tropoelastin 9.7 ± 2.4 13.5 ± 2.1 13.1 ± 1.1 0.017* 0.779 0.041*
*

p ≤ 0.05