Reem Atta Rafeeq

Department of Orthodontics, College of Dentistry, University of Baghdad, Baghdad, Iraq


  • Research   
    Evaluation of Mechanical Properties of Niti and CuNiti Archwires in as Received and After Artificial Aging
    Author(s): Mostafa Kareem Sofar and Reem Atta Rafeeq*

    Introduction: The archwires for initial alignment stage require a combination of excellent strength, excellent springiness and a long range of action. Metal appliances including orthodontic archwires are prone to corrosion or degradation in the oral environment due to different salivary components, pH levels and thermal fluctuations that may affect their performance. Aim: The purpose of the current in vitro study is to assess the impact of static deflection, thermo-cycling and acidic exposure on load deflection behaviors of nickel titanium and copper nickel titanium archwires. Materials and Methods: Samples of Niti and CuNiti, 0.016 inch, were divided into four groups: 1, as-received; 2, water storage (2 months); 3, thermo-cycling (5000 cycles); 4, acid challenge (pH 2.5). Loading and unloading forces at 0.5mm intervals were measured using modified bending test. One-way ANOVA and inde.. Read More»

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