MULLER CUPS

Muller cups are characterized by their hemispherical shape made entirely of ultra-high molecular weight polyethylene (UHMWPE).

The cups are designed to be cemented, which is why their convex outer surface has a special grooved design, aimed at improving the primary fixation of the cup itself.

Primary fixation takes place between the cup and the acetabular cavity, previously filled with cement. The purpose of the grooves on the external surface is to increase the useful surface in contact with the acetabulum, thus providing greater external adhesion and limiting the incidence of possible micro-movements that could cause mobilization.

The hemispherical design also maximizes the preservation of bone stock, allowing even distribution of bone load thanks due to the close contact between the cup and the acetabular cavity.

All cups have a marker ring in order to provide the surgeon with an indicator for correct positioning of the cup in the acetabulum. Since UHMWPE is a radiolucent material, the radio-opaque ring is necessary for subsequent post-operative checks.

Materials:

  • The main component of the cup prosthesis is made of ultra-high density polyethylene UHMWPE (ISO 5834/2). The radiological reference ring is made of stainless steel (ISO 5832/1).

Standard Muller cup

The standard Muller Cup has a depth ranging from 27mm to 37mm, depending on the size.

The holes on the outer rim (three in the case of the standard Muller, Snap-Fit and Double Snap-Fit cups, one in the case of the Muller with Shoulder) are useful for placing surgical instruments, facilitating their positioning, orientation and pressure on the acetabulum.

Sizes from 44 to 60 mm, compatibility with 28 and 32 mm heads.

Muller cup with anti-dislocation shoulder

The Muller Cup with anti-dislocation shoulder provides a larger coupling surface thanks to the 10° inclination of the spherical shell.

The holes on the outer rim (three in the case of the Muller Standard, Snap-Fit and Double Snap-Fit cups, one in the case of the Muller with Shoulder) are useful for placing surgical instruments and facilitating their positioning, orientation and pressure on the acetabulum.

Sizes from 44 to 60 mm, compatibility with 28 and 32 mm heads.

Snap-fit Muller cup

The snap-fit cup is the result of the evolution of the traditional Muller cup. It features a single snap-fit mechanism that locks the head in place, preventing the risk of dislocation.

The holes on the outer rim (three in the case of the Muller Standard, Snap-Fit and Double Snap-Fit cups, one in the case of the Muller with shoulder) are useful for placing surgical instruments, facilitating their positioning, orientation and compression on the acetabulum .

Sizes from 44 to 64 mm, compatibility with 28 and 32 mm heads.

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