When preparing the tibia in every off-the-shelf knee replacement, a knee surgeon has to choose between maximizing the fit of the implant at the expense of potentially being malrotated rotated or under sizing the fit of the tibia and getting the correct rotation.

If the decision is to maximize fit and sacrifice rotation, then there is a higher risk of implant overhang which could lead to soft tissue impingement and postoperative pain.

If instead, the surgeon decides to sacrifice fit to improve rotation then there is a higher risk of implant loosening which could be followed by subsidence.

Many believe the solution to this widespread problem is to provide more implant sizes. But even if there were 100 sizes available, you would still not be able to recreate the unique shape of each person’s tibia. We have all been born with a unique shape to our knee and only Conformis, with their custom-made knee replacement, respects our unique shape and gives the patient and surgeon both, proper alignment and rotation, without the compromises that every off-the-shelf knee forces a surgeon to make and a patient to live with.

The below study by Dr. Gregory Martin analyzed the tibial fit of three off-the-shelf Implants vs. the Conformis Customized Total Knee Replacement. The results speak for themselves.

G Martin. In-Vivo Tibial Fit Analysis of Customized, Patient-Specific TKA Versus Off-the-Shelf TKA