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Table 1 Absorbance values of the three aligners before and after in vitro aging

From: Optical properties of orthodontic aligners—spectrophotometry analysis of three types before and after aging

Aligner

Absorbance at 400 nm (±SD)

Absorbance at 700 nm (±SD)

As received

After aging

Significance

As received

After aging

Significance

All-In

0.265 ± 0.036

0.278 ± 0.011

N.S.

0.209 ± 0.030

0.215 ± 0.008

N.S.

Invisalign

0.172 ± 0.004

0.190 ± 0.03

N.S.

0.143 ± 0.004

0.155 ± 0.023

N.S.

F22

0.107 ± 0.023

0.104 ± 0.003

N.S.

0.090 ± 0.024

0.081 ± 0.004

N.S.

  1. N.S. not significant variation