Figure 4From: Damages of the tibial post in constrained total knee prostheses in the early postoperative course – a scanning electron microscopic study of polyethylene inlays Scanning electron micrographs of loaded constraint UHMWPE prosthesis. Different magnifications of the UHMWPE prosthesis showing cutting traces of the milling treatment, clefts and some micro-fissures (which occur as fine black features, see arrows), and probably local material failures: (a) Location 1, magnification 900×, bar at the bottom correspond to 5 μm. (b) Location 1, magnification 1900×, bar at the bottom correspond to 5 μm. (c) Location 7, magnification 1900×, bar at the bottom correspond to 5 μm. (d) Location 9, magnification 900×, bar at the bottom correspond to 5 μmBack to article page