Not all knee arthritis affects the whole joint. When wear is confined to one compartment, most often the inner side, a partial knee replacement resurfaces only that area and leaves the rest of your knee, including the cruciate ligaments, intact.
The advantages are real: a smaller operation, less blood loss, a shorter hospital stay, a quicker recovery and a knee that generally feels more natural.
The trade-off is longevity. Registry data shows a slightly higher rate of revision for partial replacements, partly because arthritis can progress in the other compartments over time. Revision of a partial to a total knee is, however, usually straightforward.
Suitability depends on the pattern of arthritis on your x-rays, your ligament stability and your range of movement. I will show you your own imaging and explain exactly why one option suits you better than the other.
