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Reliability performance of titanium sputter coated Ni-Ti arch wires: Mechanical performance and nickel release evaluation

Publication Type : Journal Article

Publisher : Bio-Medical Materials and Engineering

Source : Bio-Medical Materials and Engineering, IOS Press, Volume 26, Number 1-2, p.67-77 (2015)

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Keywords : Adhesion, alloy, Arches, article, Body fluids, Coatings, controlled study, Dissolution, Emission spectroscopy, flame photometry, Friction, Friction coefficients, Frictional coefficients, Hardness, Hardness and elastic modulus, Inductive coupled plasma, material coating, Mechanical performance, mechanical stimulus test, Mechanical testing, Nanoindentation, nanowire, Ni-allergy, Nickel, Nickel coatings, NiTi alloys, orthodontic wire, Plasma, priority journal, Reliability, Reliability performance, saliva substitute, Sputtering, Surface analysis, surface property, Surface roughness, Titanium, Titanium alloys, Young modulus

Campus : Kochi

School : School of Dentistry

Department : Orthodontics and Dentofacial Orthopedics

Year : 2015

Abstract : The present research was aimed at developing surface coatings on NiTi archwires capable of protection against nickel release and to investigate the stability, mechanical performance and prevention of nickel release of titanium sputter coated NiTi arch wires. Coated and uncoated specimens immersed in artificial saliva were subjected to critical evaluation of parameters such as surface analysis, mechanical testing, element release, friction coefficient and adhesion of the coating. Titanium coatings exhibited high reliability on exposure even for a prolonged period of 30 days in artificial saliva. The coatings were found to be relatively stable on linear scratch test with reduced frictional coefficient compared to uncoated samples. Titanium sputtering adhered well with the Ni-Ti substrates at the molecular level, this was further confirmed by Inductive coupled plasma emission spectroscopy (ICPE) analysis which showed no dissolution of nickel in the artificial saliva. Titanium sputter coatings seem to be promising for nickel sensitive patients. The study confirmed the superior nature of the coating, evident as reduced surface roughness, friction coefficient, good adhesion and minimal hardness and elastic modulus variations in artificial saliva over a given time period. © 2015 - IOS Press and the authors.

Cite this Research Publication : Pa Anuradha, K., S. Varma N., and Balakrishnan, Ac, “Reliability performance of titanium sputter coated Ni-Ti arch wires: Mechanical performance and nickel release evaluation”, Bio-Medical Materials and Engineering, vol. 26, pp. 67-77, 2015.

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