Glossary

Statistical procedure to reduce the bias introduced by confounding factors. One of these techniques is propensity score matching which models the probability of belonging to the treatment group of interest by accounting for covariate factors that may predict outcome.

Arthroplasty involving a combination of components that are either incompatible or a component that is incompatible with existing components.

Mobile connection between the tibial tray and the tibial insert. As opposed to a fixed bearing.

An acetabular component designed to accommodate a separate bearing surface within its internal diameter. Also refer to "Monobloc cup" and "Acetabular component".

Femoral head with an upper convex surface which articulates with the acetabular articular surface. At its distal aspect, there is a female taper which is designed to engage with the male taper of a modular femoral stem or modular femoral neck.
Heads are available in varying sizes to match the internal diameter of the acetabular articulating surface.

A femoral stem component that is composed of several parts and which also requires a modular head. Also refer to "Monobloc stem" and "Femoral component (hip)".

A component consisting of one part, e.g. for hip replacement a stem component with an integrated head or a polyethylene cup that does not require a separate insert.

An acetabular component, which usually consists of one part or parts that have been “inseparably” pre-assembled/connected. In contrast, modular cups consist of at least two parts, which are usually only connected to one another during the implantation. Also refer to "Modular cup" and "Femoral component (hip)".

A femoral stem component that consists of one part and which does not require a separate head component. In contrast, other stems consist of at least two parts. Also refer to "Modular stem" and "Femoral component (hip)".

Moderately cross-linked polyethylene (UHMWPE).