PMMA Third-Body Wear after Unicondylar Knee Arthroplasty Decuples the UHMWPE Wear Particle Generation In Vitro

Table 1

Size and shape of third-body particulate debris.

Parameter	Porcine bone particles	PMMA particles
Mean diameter (µm)	671.6 ± 186.4	644.2 ± 262.6
ECD (µm)	519.0 ± 142.9	548.4 ± 237.3
FF	0.41 ± 0.12	0.57 ± 0.12
AR	1.74 ± 0.62	1.74 ± 0.70
Roundness	0.50 ± 0.14	0.42 ± 0.14