A partial knee replacement (or unicompartmental knee replacement) replaces one region (compartment) of the knee with a metal and plastic implant.

partial knee replacement hemicap patellofemoral replacement hemicap patellofemoral replacement
Tibiofemoral partial knee replacement, replacing one compartment of the joint. Hemicap patellofemoral replacement from the front Hemicap patellofemoral replacement from the side


Knee replacement and the concept of compartments

Where the bones articulate in the knee is called a 'compartment' - the two articulations of tibia and femur are called the medial and lateral compartments, while the articulation of patella and femur are called the patellofemoral compartment. Replacing the joint of any of these compartments is called a 'partial' or 'uni-compartmental' knee replacement.

Unicompartmental knee replacement
Unicompartmental arthroplasty

An 'interpretation' of a 2005 publication presenting the results of studies to determine whether age was a determinant of success of partial knee replacement using the Oxford prosthesis.

An 'interpretation' of an article published in 1998 describing the early outcomes of a particular partial knee replacement - the 'Oxford' unicompartmental prosthesis.



Unicompartmental knee arthroplasty. Rodríguez-Merchán EC and Gómez-Cardero P. EFORT Open Rev. 2018 Jun; 3(6): 363–373.

See also -

eBook alternatives to knee replacement

Knee arthritis interventions when you are too young for a total knee replacement - ebook