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

partial knee replacement

Tibiofemoral partial knee replacement, replacing one compartment of the joint.

hemicap patellofemoral replacement

Hemicap patellofemoral replacement from the front.

hemicap patellofemoral replacement

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
Partial knee arthroplasty

Knee Replacement or Arthroplasty

Several discussions about the various kinds of knee replacement and their issues.

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.



Running on Partial Knee Replacement(s).

Partial Knee Replacement vs Osteotomy?

How do you spell relief? Partial Knee Replacement.


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

See also -

man reading book

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

Easy-to-follow eBook about what is available if you have knee arthritis and are too young for a knee replacement.

man reading book

eBook - Indications for a partial knee replacement

Easy-to-follow eBook discussing when a partial knee replacement might be chosen over a total knee replacement.