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Table 7 Percentage variations in aligner absorbance and transmittance after in vitro aging

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

  % variation at 400 nm % variation at 700 nm
Aligner Absorbance Transmittance Absorbance Transmittance
All-In +5.77 −4.53 +3.86 −1.83
F22 −0.74 −1.09 −6.55 +0.14
Invisalign +10.46 −7.70 +8.73 −4.68