Five peripheral wings which: avoid cup rotation and tilting, ensure a locking harpoon effect.
	Six holes for optional screw fixation.
	A pre compression action: the medial slot allows the initial elasticity which is required for the cup positioning.
	Central screwed hole for an easy impaction handle assembling.

Secondary stability is assured by an external HAP coating.
The cylindrical shape of the peripheral zone and the flat bottom avoid any liner tilting.

Materials and range
Cementless metal backs in Ti6Al4V alloy are available in 8 sizes (ø 48 - ø 62 mm with a 2 mm increment between sizes).