Figure 5

Scanning electron micrographs of loaded UHMWPE prostheses. The micrographs are recorded near the corners of the tibial post and show the typical cutting traces of the milling treatment, clefts, micro-fissures (which occur as fine black features) and probably also local material failures: (a) Location 1, magnification 900×. (b) Location 3, magnification 900×, bar at the bottom of (h) correspond to 5 μm. (c) Location 4, magnification 900×, bar at the bottom of (h) correspond to 5 μm. (d) Location 6, magnification 900×, bar at the bottom of (h) correspond to 5 μm. (e) Location 7, magnification 900×, bar at the bottom of (h) correspond to 5 μm. (f) Location 9, magnification 900×, bar at the bottom of (h) correspond to 5 μm. (g) Location 10, magnification 900×, bar at the bottom of (h) correspond to 5 μm. (h) Location 12, magnification 900×, bar at the bottom correspond to 5 μm.