Table 3.

Comparison of studies measuring wear on AL/AL hip

Study	Method	Cup	Wear head	Cup and head
Boutin and Blanquaert [8]	Retrieved implants (10 years)	6 μm/year	9 μm/year
Walter [36]	Simulator			6 μm/1million cycles
Bos et al. [6]	Retrieved implants (10 years)	5 μm/year	5 μm/year
Refior et al. [28]	Simulator			1 μm/1million cycles
Nevelos et al. [26]	Retrieved implants (10 years)	5 μm/year	5 μm/year
Lusty et al. [22]	Retrieved implants (2 years)	0.04 mm3/year	0.1 mm3/year
Hernigou et al. [current study]	Retrieved implants (20 years) Radiograph measurement	5 μm/year	5 μm/year	12 μm/year