Fig. 2From: Accumulated biomechanical effects of mandibular molar mesialization using clear aligners with auxiliary devices: an iterative finite element analysisObtention of CA material parameters by in vitro experiment. A Mechanical universal testing machine. B Schematic of type A2 test specimen (dimensions in millimeters). C Stress–strain curve for nonlinear material properties of 0.75-mm-thick materialBack to article page