Jet lavage

Rinsing the bone with a pulsating jet of water to remove marrow tissue from the gaps in the bone and to make room for the cement

Joint capsule

The wrapping around a joint cavity. It consists of a tender joint membrane inside (synovialis) and an outer layer which is fibrous and firm

Joint cavity

The space between the surfaces of a joint

Juvenile chronic arthritis

A sub-form of chronic polyarthritis. It starts in young people under the age of 15. Only one joint is usually affected on the onset of the disease