The korean journal of orthodontics (대한치과교정학회지)

The Korean Association Of Orthodontists (대한치과교정학회)
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A STUDY ON THE TORQUE EFFECT OF ORTHODONTIC WIRES

교정용 선재의 TORQUE 효과에 관한 연구

  • Lim, Jeong-Hyeon (Department of Orthodontics, College of Dentistry, Wonkwang University) ;
  • Kim, Sang-Cheol (Department of Orthodontics, College of Dentistry, Wonkwang University)
  • 임정현 (원광대학교 치과대학 교정학교실) ;
  • 김상철 (원광대학교 치과대학 교정학교실)
  • Published : 1994.03.01
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Abstract

The purpose of this study was to evaluate the torque effect of othodontic wires. Ten types of orthodontic wires (five types of materials, two types of cross-sectional dimensions) were selected. Each group of ire 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'$\times$ 0.025' wire showed more torque effect than 0.016'$\times$ 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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