Figure 2: SEM micrographs from the surface of uncoated (a)–(b) and CaP-coated (c)–(e) PCU disc samples at different magnifications. The PCU surface microtexture is visible in (a). The CaP coating exhibited both a fine scale apatite structure and a block-like monetite structure, which were both visible at lower magnification in (c). At higher magnification, the fine scale apatite can be seen in (d), whereas the block-like monetite can be seen in (e).]