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. 2015 Dec;9(12):ZC26-9.
doi: 10.7860/JCDR/2015/16117.6962. Epub 2015 Dec 1.

Comparative Evaluation of Frictional Properties, Load Deflection Rate and Surface Characteristics of Different Coloured TMA Archwires - An Invitro Study

Arul Pradeep Aloysius  1 , Devaki Vijayalakshmi  2 , Deepika  3 , Nagachandran Kandasamy Soundararajan  4 , Vijaykumar Neelam Manohar  5 , Nayeemullah Khan  5
Affiliations

Comparative Evaluation of Frictional Properties, Load Deflection Rate and Surface Characteristics of Different Coloured TMA Archwires - An Invitro Study

Arul Pradeep Aloysius et al. J Clin Diagn Res. 2015 Dec.

Abstract

Introduction: During tooth movement the success of sliding mechanics is dependent upon various factors which include frictional resistance at bracket-archwire interface, surface roughness of archwire materials and elastic properties of archwires. Ion implantation techniques reduce the frictional force and allow better tooth movement clinically.

Aim: The main objective of this study was to evaluate and compare the frictional properties, load deflection rate and surface characteristics of Honey dew and Purple coloured (Ion implanted) TMA wires with uncoated TMA wires.

Materials and methods: Fifteen archwire samples were divided into three groups comprising of five samples in each group namely, Group I - Uncoated TMA wires (Control), Group II - Purple coloured TMA wires and Group III- Honey dew TMA wires. Friction and load deflection rate testing were performed with the Instron Universal testing machine and the surface characteristics of the wires were evaluated before and after sliding using Scanning Electron Microscope.

Results: The mean frictional characteristics and surface roughness for Honey dew TMA wires was lesser than Purple coloured TMA wires which was statistically significant. Both the coloured TMA wires showed low frictional characteristics and less surface roughness than uncoated TMA wires (the control). The mean load deflection rate was low for both coloured ion implanted TMA wires when compared to uncoated TMA wires which was statistically significant.

Conclusion: Coloured ion implanted TMA wires, especially Honey dew TMA wires have low friction, low load deflection rate and improved surface finish. Hence they can be used in frictionless as well as sliding mechanics, where uncoated TMA wires are inefficient.

Keywords: Friction; Ion implantation; Mechanical properties.

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Figures

[Table/Fig-2]:
[Table/Fig-2]:
Retraction loop tested in Instron Universal testing machine
[Table/Fig-9]:
[Table/Fig-9]:
Scanning electron micrograph of: a) as received archwires at 500x, an-uncoated TMA wire, b) purple TMA wire, c) Honeydew wire and B, Scanning electron micrograph of archwires after sliding at 500x: 1-uncoated TMA wire, 2-purple TMA wire and 3- Honeydew wire
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References

    1. Kapila S, Sachdeva R. Mechanical properties and clinical applications of orthodontic wires. Am J Orthod Dentofacial Orthop. 1989;96(2):100–09. - PubMed
    1. Burstone CJ, Goldberg AJ. Beta titanium: a new orthodontic alloy. Am J Orthod. 1980;77(2):121–32. - PubMed
    1. Drake SR, Wayne DM, Powers JM, Asgar K. Mechanical properties of orthodontic wires in tension, bending, and torsion. Am J Orthod. 1982;82(3):206–10. - PubMed
    1. Vijayalakshmi RD, Nagachandran KS, Kummi P, Jayakumar P. A comparative evaluation of metallurgical properties of stainless steel and TMA archwires with timolium and titanium niobium archwires-an invitro study. Indian J Dent Res. 2009;20(4):448–52. - PubMed
    1. Burstone CJ, Farzin-Nia F. Production of low friction and coloured TMA by Ion implantation. JCO. 1995;29(7):453–61. - PubMed

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