Posteriorly-stabilised custom-made knee replacements now available for patients with severe deformities.

In May 2016 Mr Ian McDermott implanted the first iTotal-PS knee prosthesis in the UK, which is Conformis’s ‘posteriorly-stabilised’ version of their iTotal knee. This prosthesis allows for more major corrections of more deformed or unstable arthritic knees, whilst providing additional stability from the implant itself.

The PS design does remove slightly more bone that Conformis’s regular CR (cruciate-retaining) version, but the benefit is that the PS version has an additional post on the tibial polyethylene insert that engages with a metal bar within the femoral prosthesis, giving greater stability to the implant, allowing better outcomes in more severely damaged and more challenging joints.

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