Evaluation of torque moment in a novel elastic bendable orthodontic wire.
The objective of the study was to measure the torque moment delivered by a novel elastic bendable wire, Ti-Nb wire, and to compare it with nickel-titanium (Ni-Ti) and titanium-molybdenum (Ti-Mo) alloy wires. Two sizes of Ti-Nb, Ni-Ti and Ti-Mo alloy wires and 0.022-inch slot stainless steel brackets were ligated with elastic modules or ligature wires. The torque moment delivered by the various wire-bracket combinations was measured using a torque gauge at the temperature and humidity of 37°C and 50%, respectively. As the degree of applied torque and the inserted wire size increased, the torque moment gradually increased. The torque moment of Ti-Nb wires was smaller than those of Ni-Ti wires and Ti-Mo wires, at more than 20 degrees applied torque. The torque moment with wire ligation was significantly larger than those with elastic ligation.
Department of Orthodontics and Dentofacial Orthopedics, The University of Tokushima Graduate School, Institute of Health Biosciences.
Shingo
S
Kuroda
Hiroto
H
Watanabe
Akira
A
Nakajima
Noriyoshi
N
Shimizu
Eiji
E
Tanaka
D004548:Elasticity; D009068:Movement; D009969:Orthodontic Wires; D019415:Torque