Korean J Orthod.
1994 Mar;24(1):87-94.
A study on the torque effect of orthodontic wires
- Affiliations
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- 1Department of Orthodontics, College of Dentistry, Wonkwang University, Korea.
Abstract
- The purpose of this study was to evaluate the torque effect of orthodontic wires. Ten types of orthodontic wires (five types of materials, two types of cross-sectional dimensions) were selected. Each group of wire type was constituted with five specimens. These specimens were tested on the universal testing machine(Instron) with specially-designed jig. The torque-twist curve of each wire was obtained and the results were analyzed statistically. The results were as follows: 1. 0.017" X 0.025" wire showed more torque effect than 0.016" X 0.022" wire at the same twist. 2. Torque effect was the greatest in stainless steel and the least in Nitinol. 3. The maximum amount of torque was the greatest in heat-treated Blue Elgiloy and the least in Nitinol.
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