MUTARS® Distal Femur & GenuX® MK
Modular megaprosthesis for the distal femur with a rotating-hinge knee joint (GenuX® MK) — in tumors with major bone loss at the knee.

MUTARS® Distal Femur provides distal femoral reconstruction with replacement of the knee joint by a rotating-hinge prosthesis. It is combined with the modular GenuX® MK (Modular Knee) system, introduced in 2013, which offers an intraoperative choice between mobile-bearing and fixed-bearing polyethylene inserts.
The biomechanically optimized GenuX® MK coupling allows flexion of up to 130°. To simplify the system, the same stems are used for both the femur and the tibia, together with offset adapters offering 360° of rotational freedom. In tumor treatment, the GenuX® MK components are fully compatible with the standard MUTARS® products.
The system offers four femoral component sizes and four tibial component sizes, cemented and uncemented stems (in four lengths and nine diameters), dedicated augments and spacers — more than 150 possible combinations to tailor treatment to each case. For more extensive bone loss, EPORE® metaphyseal cones and components (porous titanium, for osseointegration) are available.
- Tumors in the knee region with major femoral and tibial bone loss.
- Distal femoral reconstruction with rotating-hinge knee arthroplasty.
- Reconstruction following tumor resection or revision with extensive bone defects.
MB or FB insert
Intraoperative choice between mobile-bearing (MB) and fixed-bearing (FB) polyethylene.
130° flexion
Biomechanically optimized GenuX® MK coupling, with rotating hinge.
Over 150 combinations
4 femoral + 4 tibial sizes, augments and spacers for each anatomy.
MUTARS® compatible
GenuX® MK components are compatible with standard MUTARS® products in tumor treatment.

- Location
- Distal femur + knee joint
- Joint type
- Rotating hinge, GenuX® MK coupling
- Maximum flexion
- 130°
- Polyethylene insert
- Mobile-Bearing or Fixed-Bearing
- Sizes
- 4 femoral × 4 tibial; offset adapters with 360° rotation
- Bone-loss augmentation
- Augments, spacers and EPORE® metaphyseal cones/components (porous titanium)
- Materials
- implatan® (TiAl6V4), implavit® (CoCrMo), UHMW-PE
Would you like information about MUTARS® Distal Femur & GenuX® MK?
The Ronda Medical team provides details about availability, configurations, and technical support.
Contact the team