Load Deflection Characteristics of Orthodontic Gummetal® Wires in Comparison with Nickel–Titanium Wires: An In Vitro Study

Sabbagh, Hisham; Janjic Rankovic, Mila; Martin, Daniel; Mertmann, Matthias; Hötzel, Linus; Wichelhaus, Andrea (2024): Load Deflection Characteristics of Orthodontic Gummetal® Wires in Comparison with Nickel–Titanium Wires: An In Vitro Study. Materials, 17 (2): 533. ISSN 1996-1944

Abstract

The aim of this study was to investigate the load deflection characteristics of Gummetal® wires in comparison to nickel–titanium (NiTi) wires. Four different NiTi wires and one Gummetal® archwire were analyzed in two dimensions (0.014″ (0.36 mm) and 0.016″ × 0.022″ (0.41 mm × 0.56 mm)) and in two different orientations (edgewise and ribbonwise) using three-point bending tests at T = 37 °C. Force–displacement curves were recorded and analyzed. The Gummetal® 0.014″ wires exhibited higher forces compared to the NiTi wires at 2.0 mm deflection. At 1.0 mm deflection, the opposite pattern was observed. For the 0.016″ × 0.022″ Gummetal® wires, the forces were within the force interval of the NiTi wires at 2.0 mm deflection. At a deflection of 1.0 mm, no residual force was measurable for the Gummetal® wires. All the NiTi wires investigated showed hysteresis and a superelastic plateau. However, the Gummetal® did not form a plateau, but hysteresis was present. An easier plastic deformability compared to the NiTi wires was observed for all the tested geometries.

• Doc-Type: Article (LMU Hospital)
• Organisational unit (Faculties): 07 Medicine > Medical Center of the University of Munich > Polyclinic for Orthodontics
• DFG subject classification of scientific disciplines: Life sciences
• DFG: Funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - 491502892