The cemented acetabular cup are entirely produced in UHMWPE and are available with an outer diameter of 44, 46, 48, 50, 52, 54, 56, 58 mm.

The inner diameters are appropriate to be coupled to femoral heads of 28 and 32 mm.

The acetabular cups are available in three different versions:

standard;

low profile;

with an anti-dislocation shoulder, also for 36 mm diameter heads.

The standard version is completely hemispherical and is there-fore indicated for deep acetabula.

The low profi le version is characterised by a vault with an angle which is lower than that of a hemisphere and is therefore indicated for acetabula which have a reduced depth.

The anti-dislocation version has a lateral portion which guarantees a grater coverage of the femoral head and prevents any accidental dislocation.

The identification diameters refer to the actual diameters of the cups.

To prepare the acetabular cavity it is therefore necessary to use reamers of larger diameters to ensure a uniform distribution of the cement mantle. It is possible to use the round reamers of the SPH series, whose identification diameter coincides with the actual diameter of the reamers them-selves.

The acetabular plates have been designed as supporting structures when cementing cups entirely made of UHMWPE.

Such reinforcing cages are made of pure Titanium with 50, 54, 58, 62 and 66 mm external diameters.

The possibility of using a plate in Titanium has been conceived to obviate the cases of intolerance to certain elements composing Steels (as Nickel, Chromium) and avoid any corrosion phenomenon.

The main indications for using the reinforcing cages are:

revision of previous implants in presence of insuffi cient trophism or seriously altered bone structures;

congenital dyplasias;

acetabular fractures;

in general, in any cases providing the use of cement for fixing the cup with reconstruction of the acetabular seat.

The reinforcing cages are anchoring to the pelvis by a caudal hook, to be inserted into the foramen obturatoris, two screws by the superolateral area and other screws fi xerd to the iliac wing with three cranial wings.

The wings are opportunely defor-med during the operation to obtain the highest congruence between the implant and the anchoring surfaces.