Wear Behavior of an Unstable Knee: Stabilization via Implant Design?

Table 1

Results of wear particle analysis.

	Unstable knee	Stable knee	Effect size
Particles analysed	2016	1510
Estimated number of particles per 10^6 cycles	1.09 10^12  ± 0.14 10^12	0.80 10^12  ± 0.12 10^12	2.23
Equivalent circle diameter	0.263 ± 0.160 µm	0.246 ± 0.162 µm	0.11
Aspect ratio	1.776 ± 0.584	1.700 ± 0.504	0.14
Roundness	0.548 ± 0.151	0.577 ± 0.143	0.20
Form factor	0.657 ± 0.137	0.687 ± 0.120	0.23