Mechanical Analysis of the Begg Torquing Auxiliary

Abstract

An experimental program was undertaken to evaluate the four-spur torquing auxiliaries used in the Begg technique of orthodontic treatment. A laboratory testing apparatus was specifically designed for torque research; it enables separation of the torque from other incisor force system components. Three wire sizes and two spur angles were studied; lingual root torque and vertical displacements and forces associated with wire/bracket engagement and deactivation of the torquing auxiliary were measured for various angular. positions of the incisors. Twelve specimens for each of six subsamples were prepared and tested; the data were statistically analyzed.