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. 2020 May 20;11:975. doi: 10.3389/fmicb.2020.00975

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Copyright © 2020 Pentland, Stevens, Williams, Baker, McCall, Makarovaite, Balfour, Mühlschlegel and Gourlay.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Atomic force and scanning electron microscopy surface topography of the valve and esophageal flange of the Provox Vega voice prosthesis. (A) The Provox Vega voice prosthesis. (B) SEM images of the valve and inner-side of the prosthesis hood were taken at x120 magnification. The scale bars represent 700 μm. (C) AFM images of the valve and esophageal flange were taken of 50 μm × 50 μm surface areas with a scan height of 700 nm. (D) AFM 3D plot of a 50 μm × 50 μm area of the esophageal flange. Z-axis is 0–1 μm. Several images were taken and representative examples are presented.