Glossary

See: "Modular head".

Describes the distance between the centre of the head and a reference point on the taper in the direction of the taper axis. The size specifications which range from XS to XXXL vary between manufacturers.

In contrast to a total arthroplasty, a hemiarthroplasty (hemi = half) does not replace the entire joint but only part of it. A typical example is a dual-head arthroplasty, in which only the femoral component of the hip joint is replaced with the head, but not the acetabular component.

Describes coupled knee systems with lateral joint stability and with a simple (single degree of mobility = a “rigid hinge”) or a rotating hinge joint between the femoral component and the tibial tray.

See: femoral component (hip)

Highly cross-linked polyethylene (UHMWPE). Also refer to "Polyethylene (PE)".

Arthroplasty in which one component is cemented while the other is not cemented. In hip replacement, „hybrid“ refers to the combination of a cemented stem and a uncemented acetabular component, while „reverse hybrid“ refers to the combination of an uncemented stem and a cemented  acetabular component. In the case of knee arthroplasty, „hybrid“ refers to the combination of cemented tibial support and uncemented femoral component and „reverse hybrid“ the reverse combination.