Partial Knee Replacement

Why replace what isn't broken? Knees do not necessarily wear out evenly. Sometimes one part of the knee is perfectly fine while another part is completely destroyed. Depending on where the damage is in your knee, a partial knee replacement may be an option for you. 

A partial, or unicondylar, joint replacement involves resurfacing the worn out portion of the joint, either the inside, outside or kneecap, and leaving the rest of the joint alone. To work properly, the components must be put in extremely accurately, with the assistance of a robot. Even a millimeter or two of tilt or rotation dramatically affects the wear patterns and longevity of the components. Think of how a car out of alignment means rapid tire wear. 

With a partial knee replacement, there is no need for saws, drills or guides. In fact, the procedure is so minimal that you can walk out of the surgery center 1½ hours after surgery and begin physical therapy the next day.

Download a printable PDF on the Mako partial knee replacement 

Open Form

A CT scan of the your knee is entered into a software program that creates a 3-D replica of the your knee. Before surgery, Dr. Stone plans the placement of your partial knee replacement.

During surgery, the combination of a robotic arm and computer navigation provides Dr. Stone with real-time visual, tactile, and auditory feedback enabling consistently reproducible precision and optimal positioning of the implant within the knee. It is this level of pinpoint precision and accuracy that facilitates optimal implant positioning and alignment to result in a more natural knee motion following surgery.

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I am biased towards only replacing the parts that are worn out.  I prefer to delay a full replacement if I can resurface the medial, lateral or patella femoral joint alone or in combination.  My patients recover faster, the knees feel more normal, and they do more sports with them.