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. 2016 May 10;4:41. doi: 10.3389/fbioe.2016.00041

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Copyright © 2016 Banik, Riley, Platt and Brown.

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) or licensor 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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Stem cell migration on each surface was assessed from 6 to 18 h post-seeding. The results demonstrate random migration on the PEEK and acid-etched endoskeleton surfaces indicated by the rose plots in (A), a histogram of the angle of migration for each cell monitored in (B), and the graph of directionality in (C), which demonstrates significance between PEEK and acid-etched endoskeleton surfaces when compared to the smooth titanium surface. Furthermore, the non-random migration on smooth titanium followed the grooves created by milling the surface, and this non-random migration resulted in an expected velocity increase, which was significantly higher than both the PEEK and acid-etched endoskeleton surfaces. Between the two surfaces demonstrating random migration, the MSCs on the acid-etched endoskeleton surface demonstrated a significantly higher velocity than those on PEEK. Significance, p < 0.05, is demonstrated by bars between groups in (B,C).