Table 1.

Soft bearings’ wear rates found in vitro through simulators.

Soft Bearings	Paired Materials *	Overall Wear Rate (mm3/Mc)	Ref.
MoP	CoCr—XLPE	6.71 ± 1.03	[135]
	Biolox®Delta—XLPE	2.0 ± 0.3 **	[136]
CoP	CoCrMo—XLPE	4.09 ± 0.64	[137]
	Alumina—XLPE	3.35 ± 0.29	[138]
	Alumina—PE	34	[139]
	ZTA—PE	80	[140]

* all the abbreviations are reported at the end of the manuscript. ** only in this case the unit of measure is mg/Mc.