Comparison between Force Deflection Values of Different Types of Orthodontic Arch Wires


Aims: To evaluate the force values of different types of arch wires. Materials and Methods: Five types of arch wires used. The sample consisted of 150 wires specimens divided into three deflections (1 mm, 2mm and 3 mm). A universal tensile testing machine with the use of special designed fixture was used to perform Three Point Bending Test and the force value related to gram (gm) was measured during loading (activation) of the wire to 1 mm, 2 mm or 3 mm deflections. Results: The results of this investigation showed a significant difference (P≤ 0.05) in force values among all arch wires. Conclusions: The conclusions of this study showed that the solid stainless steel wires provided a heavy force, while the multistranded gave rise to the lowest force value.