From: Stiffness comparison of mushroom and straight SS and TMA lingual archwires
Archwire size
D value
SS 0.016 × 0.016
0.20 (NS)
SS 0.016 × 0.022
0.15 (NS)
TMA 0.017 × 0.017
0.31 (NS)
SS 0.018 × 0.018
0.22 (NS)
SS 0.018 × 0.025
0.36 (NS)