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Fig. 4 | Progress in Orthodontics

Fig. 4

From: Synergistic effect of wire bending and salivary pH on surface properties and mechanical properties of orthodontic stainless steel archwires

Fig. 4

Comparison of surface roughness, Young’s modulus, and maximum force of bent and straight wires. Surface roughness (Ra-value, μm) of bent and straight SS archwires was measured by a profilometer; flexural Young’s modulus (GPa) and maximum force (N) of bent and straight SS archwires were measured by a four-point bending test; surface roughness (Ra and Rz,μm) of straight SS wires were measured via 3D reconstruction of SEM images. All measured wires were exposed to air or immersed in artificial saliva at pH 5.6, 6.6, and 7.6 for 4 weeks according to protocol

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