In these cases, a constrained type of knee replacement implant must be used. Constrained implants have larger internal supports that hold the implant together and have stems or rods that anchor the implants deep within the bone so that they can absorb the increased forces necessary to hold the knee together. I personally use the Zimmer NexGen LCCK system for these cases.
Here are before and after radiographs (x-rays) of a recent case:
|Severely bowed knee with advanced arthritis|
|Post-operative x-ray showing knee replacement with constrained LCCK implants.|