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.
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.
12. 13. 14. 15. 16. 17. 18.
19. 20. 21.
References 1. 2.
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