The flexure moduli of elasticity of solid and multi-stranded orthodontic wires were determined. Results for the solid wires approximated their tensile values, but the differences were statistically significant for the stainless steel, chromium-cobalt-nickel, and nickel-titanium alloys. The flexure moduli of the multi-stranded wires ranged from 0.89 to 5.11 x 106 psi, and were dependent on the direction of activation.
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References
1.
Crandall, S.H. and Dahl, N.C.: An Introduction to the Mechanics of Solids , New York: McGraw-Hill , 1959, pp. 189, 244, and 290.
2.
Kusy, R.P.: Comparison of Nickel-Titanium and Beta Titanium Wire Sizes to Conventional Orthodontic Arch Wire Materials, Am J Orthod79:625-629, 1981.
3.
Thurow, R.C. : Edgewise Orthodontics, 4th ed., St. Louis: C.V. Mosby, 1982, pp. 34-38.
4.
DeFranco, J.C. ; Koenig, H.A.; and Burstone , CJ: Three-dimensional Large Displacement Analysis of Orthodontic Appliances, Biomechanics9:793-801, 1976.
Solonche, D.J. ; Burstone, C.J.; and Vanderby , R., Jr.: A Device for Determining the Mechanical Behavior of Orthodontic Appliances, IEEE Trans on Eng in Med and Biol24:538-539,1977.
9.
Goldberg, A.J. ; Vanderby, R., Jr.; and Burstone , C.J.: Reduction in the Modulus of Elasticity in Orthodontic Wire, J Dent Res56:1227-1231, 1977.
10.
Brantley, W.A. : Comments on Stiffness Measurements of Orthodontic Wires, J Dent Res55:705, 1976.
11.
Zapffe, C.A. : Stainless Steel, Cleveland, Ohio: The American Society for Metals, 1949, pp. 220 and 225.
12.
Burstone, C.J. : Variable-Modulus Orthodontics, Am J Orthod80:1-16, 1981.
