CONDYLAR CONSTRAINED KNEE The MULTIGEN PLUS CCK Knee is designed for patients who may have joint instability or inadequate ligament function, in complex primary or revision procedures. Whilst it has the same internal femoral bone cuts as the primary knees, the MULTIGEN PLUS CCK Knee allows coupling of standard or offset stems and augments. The cemented MULTIGEN PLUS CCK femoral component is available in 5 sizes to ensure a superb patient fit, and can be used in combination with primary implants to provide additional flexibility.