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VOLUME 10 , ISSUE 2 ( March-April, 2019 ) > List of Articles


Surface Topography and Composition of As-received and- retrieved Initial Archwires: A Comparative Study

Pragti Arora, Hemant Garg, HB Bohidar

Keywords : Archwires, Energy dispersive X-ray spectroscopy, Nickel-titanium, Scanning electron microscope, Stainless steel, Surface topography

Citation Information : Arora P, Garg H, Bohidar H. Surface Topography and Composition of As-received and- retrieved Initial Archwires: A Comparative Study. World J Dent 2019; 10 (2):144-149.

DOI: 10.5005/jp-journals-10015-1621

License: CC BY-NC 4.0

Published Online: 01-04-2019

Copyright Statement:  Copyright © 2019; The Author(s).


Aim: To compare the surface topography and composition of As-received and retrieved initial archwires using scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy (EDS). Materials and methods: The as-received round 0.016-inch stainless steel and nickel titanium archwires were taken from wire packets. The surface and composition of retrieved 0.016-inch stainless steel and nickel-titanium wires (n = 15), in service intraorally for at least 2 months, were compared using SEM and EDS. Results: The SEM images of As-received wires showed surface irregularities. The As-received stainless steel wire was found to be rougher than the As-received nickel titanium wire. In comparison with the As-received wire, the retrieved stainless steel archwires revealed deeper grooves, pits, and areas of corrosion. The retrieved nickel titanium wires, on the comparison, revealed no appreciable difference. The EDS analysis showed leaching of iron, nickel, and chromium in stainless steel wires and leaching of nickel in nickel-titanium wires. Oxygen and carbon concentrations were increased in both. Conclusion: There does occur a change in the surface topography and composition of wires after use intraorally. Changes were more appreciable in stainless steel wires than nickel-titanium wires. Leaching and deposition of surface elements need to be correlated with the toxic human levels. Clinical significance: Surface topography and surface roughness of the orthodontic archwires affect the efficacy of orthodontic treatment. This study will try and elicit the qualitative and quantitative changes in the initial archwires with respect to surface topography and surface roughness and also attempt to shed some light on the ways to minimize any alterations.

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  1. Amini F, Rakshan V, Pousti M, et al. Variations in surface roughness of seven orthodontic archwires: an SEM-profilometry study. Korean J Orthod 2012;42(3):129-137.
  2. Yu JH, Wu LC, Hsu JT, et al. Surface roughness and topography of four commonly used types of orthodontic archwires. J Med Biol Eng 2011;31(5):367-370.
  3. Daems J, Celis JP, Willems G. Morphological characterization of as-received and in vivo orthodontic stainless steel archwires. Eur J Orthod 2009;31:260-265.
  4. Mikulewicz M, Wolowiec P, Michalak I, et al. Mapping chemical elements on the surface of orthodontic appliance by SEM-EDX. Med Sci Monit 2014;20:860-865.
  5. Kararia V, Jain P, Chaudhary S, Kararia N. Estimation of changes in nickel and chromium content in nickel-titanium and stainless steel orthodontic wires used during orthodontic treatment: an analytical and scanning electron microscopic study. Contemp Clin Dent 2015;6:44-50.
  6. Verstrynge A, Humbeeck JV, Willems G. In-vitro evaluation of the material characteristics of stainless steel and beta-titanium orthodontic archwires. Am J Orthod Dentofac Orthop 2006;130:460- 470.
  7. Wilkinson JV. Some metallurgical aspects of orthodontic stainless steel. Am J Orthod Dentofac Orthod 1962;48(3):192-206.
  8. Hobbelink MG, He Y, Xu J, et al. Synergistic effect of wire bending and salivary pH on surface properties and mechanical properties of orthodontic stainless steel archwires. Prog Orthod 2015;16:37.
  9. Kim H, Johnson JW. Corrosion of stainless steel, nickel-titanium, coated nickel-titanium, and titanium orthodontic wires. Angle Orthod 1999;69(1):39-44.
  10. Edie JW, Andreasen GF, Zaytoun MP. Surface corrosion of nitinol and stainless steel under clinical conditions. Angle Orthod 1981;51(4):319-324.
  11. Grimsdottir MR, Pettersen AH. Surface analysis of nickel-titanium archwire used in vivo. Dent Mater 1997;13:163-167.
  12. Premanand P, Kumar SS, Shankar AJ. An evaluation and comparison of composition and surface characteristics of different orthodontic wires – energy dispersing spectrometry and SEM study. Int J Rec Trends Sci Technol 2014;10(2):233-238.
  13. Krishnan M, Seema S, Tiwari B, et al. Surface characterization of nickel titanium arch wires – Med J Armed Forces India 2015;71(Suppl 2):S340-S345.
  14. Brandies HF, Es-Souni M, Kock N, et al. Transformation behaviour, chemical composition, surface topography and bending properties of five selected 0.016” x 0.022” NiTi archwires. J Orofac Orthop 2003;64(2):88-89.
  15. Eliades T, Athanasiou AE. In vivo ageing of orthodontic alloys: Implications for corrosion potential, nickel release, and biocompatibility. Angle Orthod 2002;72:222-237.
  16. Eliades T, Eliades G, Athanasiou AE, et al. Surface characterization of retrieved NiTi orthodontic archwires. Eur J Orthod 2000;22:317-326.
  17. Eliades T, Zinelis S, Papadopoulos MA, et al. Nickel content of as-received and retrieved NiTi and stainless steel archwires: assessing the nickel release hypothesis. Angle Orthod 2004;74(2):151-154.
  18. Rongo R, Ametrano G, Gloria A, et al. Effects of intraoral aging on surface properties of coated nickel-titanium archwires. Angle Orthod 2014;84:665-672.
  19. Lee SH, Chang Y II. Effects of recycling on the mechanical properties and the surface topography of nickel-titanium alloy wires. Am J Orthod Dentofac Orthop 2001;120:654-663.
  20. Zinelis S, Makou M, Gioka C, et al. Comparative study of the effect of in vitro and in vivo aging on morphology, microstructure and elemental composition of nickel-titanium orthodontic archwires. Hel Orthod Rev 2003;6:45-58.
  21. Uzer B, Gumus B, Toker SM, et al. A critical approach to the biocompatibility testing of NiTi Orthodontic archwires. Int J Metall Met Phys 2016; 1(003):1-7.
  22. Santos AAR, Pithon MM, Carlo FGC, et al. Effect of time and pH on physical-chemical properties of orthodontic brackets and wires. Angle Orthod 2015;85(2):298-304.
  23. Toker SM, Canadinc D. Evaluation of the biocompatibility of NiTi dental wires: a comparison of laboratory experiments and clinical conditions. Mater Sci Eng C 2014;40:142-147.
  24. Gopikrishnan S, Melath A, Ajith VV, et al. A comparative study of biodegradation of various orthodontic archwires: an in vitro study. J Int Oral Health 2015;7(1):12-17.
  25. Ghazal ARA, Hajeer MY, Al-Sabbagh R, et al. An evaluation of two types of nickel-titanium wires in terms of micromorphology and nickel ions’ release following oral environment exposure. Prog Orthod 2015;16:9.
  26. Shabalovskaya SA, Tian H, Anderegg JW, et al. The influence of surface oxides on the distribution and release of nickel from nitinol wires. Biomaterials 2009;30:468-477.
  27. Eliades T, Zinelis S, Papadopoulos MA, et al. Nickel content of as-received and retrieved NiTi and stainless steel archwires: assessing the nickel release hypothesis. Angle Orthod 2004;74(2):151-154.
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