10313 Digital Image Correlation Analysis of Orthodontic Brackets Subjected to Force Couple Produced by Wire Rotation

Abstract

The deformations of orthodontic brackets subjected to force couple produced by orthodontic wire rotation were investigated. Polycarbonate, stainless-steel and ceramic brackets were used. The wire was rotated using two stepping motors, which were equipped in an orthodontic torque simulator. Images of the brackets were acquired using a stereo microscope and two image charge-coupled device cameras, and the deformation of the brackets was measured using a three-dimensional digital image correlation technique. The total angle of rotation of the wire was 28.8 degrees. Results indicated that the deformation of the plastic bracket was larger than those of the stainless steel and ceramic brackets.