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Figure 8: Graded Thermodynamic Archwire.

Wallaby (High temper continuous roll): For use with light wire or edgewise appliances, wallaby is a higher temper than standard chrome alloy wire. Its higher yield strength over equivalent diameter stainless steel provides higher force for a given deflection.

7. 8. 9. 10.

Drift free archwires: A built in 1 mm midline stop prevents lateral arch wire shift. The shifting of arch wire might injure the buccal mucosa on one side and the wire is out of the buccal tube on the other side. The permanent midline stop also acts as a reference point where measurements can be taken easily. Many times the mark or the spot to demarcate the midline wears off Conclusion Recent advances in orthodontic wire alloy have resulted in varied array of wire that exhibit a wide spectrum of properties. Presently the orthodontist may select, from all the available wire types, one that best meets the demands of a particular clinical situation.The selection of an appropriate wire size and alloy type in turn would provide the benefit of optimum and predictable treatment results. The clinician must therefore be conversant with the mechanical properties and the clinical application of these wires.

3. 4. 5. 6.

IJO

Proffit W.R. Contemporary orthodontics. 4th Edition 2007. T.M. Graber, Robert L. Vanarsdall, Vig Orthodontic: Current Principles And Technique 4th Edition. William A. Brantley, Theodore Elades Orthodontic materials Scientific and clinical aspects. Burstone C.J. Variable modulus orthodontics. Am. J. Orthod. 1981. Vol. 80: 9-16. R.P. Kusy A review of contemporary archwires Their properties and characteristics. Angle Orthod, 1997: Vol. 67: 197-208 Kusy RP, Dilley GJ, Whitley JQ. Mechanical properties of stainless steel orthodontic archwires. Clinical Materials 1988: Vol. 3: 41-59.

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12. 13. 14. 15. 16. 17. 18.

19. 20. 21.

References 1. 2.

11.

NO. 3

FALL 2014

22. 23. 24. 25. 26.

Backofen W.A. and Gales G.F.: The low temperature heat treatment of stainless steel for orthodontics. Angle Orthod. 1951: Vol. 21 117-128. Funk A.C. Heat treatment of stainless steel. Angle. Orthod 1951: Vol. 21: 129 - 138. Backofen W.A. Heat treatment of stainless steel for orthodontics. Am. J. Orthod, 1952: Vol. 38: 755 - 765. Wilcock A.J. Applied materials engineering for orthodontic wires. Aust. Orthod. Journal 1989: Vol. 11: 22 - 29. JCO interviews: Arthur J. Wilcock, Jr. on orthodontic wires. J. Clin. Orthod 1988. Vol. 08: 484 - 489. Tomilson J.C., Fillmore G.M. Alloy wire. Angle Ortho. 1976. Vol. 46: 187-195. Martin R.L., Sarkar N.K. Effect of heat treatment on various properties of Blue elgiloy. J Clin Orthod 1984 Vol. 28: 432 - 435. Kusy RP, Greenberg AR. Effects of composition and cross section on the elastic properties of orthodontic arch wires. Angle Orthod 1981: Vol 51:325-341. Andersen G.F. Marrow R.E. Laboratory and clinical analysis of nitinol wire. Am. J. Orthod. 1978. Vol. 73: 142 - 151. Ackerman J.L. et al., Nitinol wire round table J. Clin. Orthod. 1978. Vol. 22: 479 485. Lopez L. et al., Bending characteristics of nitinol wire. Am. J. Orthod. 1979. Vol. 75: 569 - 575. Anderson G.F. A clinical trail of alignment of teeth using 0.019” thermol nitinol wire with a transition range between 310 and 45°C. Am. J. Orthod 1980. Vol. 78: 528 - 537. Edie J.W. Andersen G.F. et al., Surfaces corrosion of ntinol and stainless steel under clinical conditions. Angle Orthod. 1981. Vol. 57: 319 - 324. Drake S.R. Wayne D.M. et al. Mechanical properties of orthodontic wires in tension, bending and torsion. Am. J. Orthod. 1982. Vol. 82:45-49 Schwannger B. et al. Effect of Long term immersion corrosion on flexural properties of nitinol. Am. J. Orthod. 1982. Vol. 82: 45 - 49. Fujio Miura et al. The super elastic property of nickel – titanium wire for use in orthodontics. Am. J. Orthod. 1986. Vol. 90: 01 - 10. Burstone C.J. et al, Chinese Niti - a new orthodontic alloy. Am. J. Orthod. 1985. Vol. 87: 445 - 452. Fujio Miura et al. Japanese Niti - alloy wire, use of direct electric resistance heat treatment. Eur J Orthod 1988 Vol. 10:187 - 191. Fuijo Miura et al. New application of super - elastic Niti rectangular wires. J. Clin. Orthod 1990. Vol. 24: 544 - 548. Burstone C.J. et al., Beta - Titanium, A new orthodontic alloy. Am. J. Orthod. 1980. Vol. 77: 121 - 132.

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International Journal of Orthodontics  
International Journal of Orthodontics  
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