Close-up of test station no.2of HUT-4hip joints imulator showing 50 mm
diameter Metasul MoM hipinstalled,with out lubricant chamber.Gaitofrighthipis
simulated. Duro macetabular cupisce mented to a positionof70° inclination (66°
abduction, 32° ante version).At this moment,i.e.,maximum extension(outer cradle) and neutral abduction–adduction (in nercradle) of the femoral head,and
maximum load of the second(toe-off) load peak(vertical loading bar above the
joint), highfrictionalmostdislocatesthejointasthemotionismomentarilypurely
abduction of head.Hence,70° proved to be close to the highest possible inclination
angle thatcouldberunwith.