Fig. 2From: Εffect of cleansers on the composition and mechanical properties of orthodontic aligners in vitroATR-FTIR spectra of Clear Aligner (C) before (CO) and after treatments with Retainer Brite (RB), Retainer Cleaner (RC) and Steraligner (ST) cleaners. An additional peak appeared at 1669 cm−1 after ST cleaner (expanded 2000–650 cm−1 range, absorbance scale)Back to article page