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. 2019 Feb 1;14(2):e0210402. doi: 10.1371/journal.pone.0210402

Fig 1. SEM analysis of surface morphology and coating thickness of the CaP coating used in the study.

Fig 1

A.) Representative image of the CaP coating present on the TAN discs used during the in vitro aspect of the study. Scale bar is 50 μm. The image is from one disc and is representative of 2 further discs independently prepared and analyzed. B.) Left: Elemental composition of the CaP coating, as determined by energy dispersive X-ray analysis (EDX). The black line indicates the TAN screw, while the lower and upper layers of the coating are indicated by the light grey and dark grey lines, respectively. Right: Representative image of a longitudinal cross-section of the CaP-coated TAN screw (light grey) demonstrating the thickness of the CaP coating present on the screw and the regions of interest selected for the EDX analysis: screw–open black circle; lower level of CaP coating—open white diamond; upper layer of coating—open white square. Image is from one screw and is representative of 1 further screw, independently prepared and analyzed. Scale bar is 100 μm.