Mechanical properties and clinical performance of different brands of nickel titanium archwires following intraoral use: A prospective clinical trial

Omar A. E. Salama; Amira Aboalnaga; Rania Salama; Fouad A. El-Sharaby; Essam Nassif

doi:10.53730/ijhs.v6nS4.7698

Authors

Omar A. E. Salama
20184513@fue.edu.eg
Department of Orthodontics, Faculty of Oral and Dental Medicine, Future University in Egypt
Amira Aboalnaga Lecturer in Orthodontics, Faculty of Dentistry, Cairo University, Egypt
Rania Salama Lecturer in Biomaterials, Faculty of Dentistry, Cairo University, Egypt
Fouad A. El-Sharaby Professor of Orthodontics, Faculty of Dentistry, Cairo University, Egypt
Essam Nassif Professor of Orthodontics, Faculty of Oral and Dental Medicine, Future University in Egypt

Keywords:

nickel titanium, plateau slope, dentaurum, American orthodontic, IMD orthodontic

Abstract

Objectives: To evaluate the effect of intraoral use of three brands of nickel titanium archwires on their mechanical properties and crowding relief ability. Methods: Three groups (n=39) of 0.016” round NiTi archwires: Dentaurum (A), American Orthodontics (B) and IMD Orthodontics (C) were subdivided according to the intervention (n=13) into: As-received, no intervention (subgroup 1), in-vivo (subgroup 2), and in-vitro (subgroup 3). Plateau slope, resilience, and elastic modulus of all wires were tested using a universal testing machine. The relief of crowding following intraoral use for 8 weeks was assessed using Little’s irregularity index. Results were significant at p ≤ 0.05. Results: For all NiTi brands, the highest plateau slope value; among the subgroups, was recorded following the intraoral use (in-vivo). For the in-vivo wires (subgroup 2), the Dentaurum wires revealed the lowest plateau slope value (0.258 N/mm ±0.032) while the IMD wires revealed the lowest resilience values (36.24 J.mm-3 ±0.6). There was no significant difference in the modulus of elasticity of wires between all 3 subgroups. The Little’s irregularity index decreased over time, and the difference between the groups was not significant. No significant difference was found between the groups in terms of inter-canine width.

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