Anatomical: left and right
Material: Cobalt-Chrome (Co-Cr-Mo ISO 5832-4)
Cemented: 0.5 mm deep pockets
GMK Sphere features a fully congruent medial compartment providing:
High stability throughout the range of motion
No paradoxical motion between femur and tibia
No implant-related “mid-flexion” instability
NATURAL PATELLAR TRACKING
GMK Sphere replicates natural lateralised patella tracking to reduce patello femoral joint pressure and address anterior knee pain[8,9]:
Trochlea groove lateralised by 2 mm to enable natural patella tracking.
Flattened medial trochlear wall prevents patello-femoral overstuffing minimising retinacular tension.
Anatomic patellar implant with medialised dome allows for optimal bony coverage with reduced soft tissue tension, improved stability and contact area.
Extensive anthropometric research on a unique global database containing more than 15,000 CT and MRI scans of knees validated the:
Range of 13 femoral sizes with 2 mm increments that best fit a broad spectrum of anatomic profiles
Anatomically shaped tibial baseplate
Range of inserts with 1 mm increments
The combination of 13 femoral sizes and inserts with 1 mm increments allows the surgeon to “fine tune” ligament balance and improve stability throughout the range of motion.PATIENT-SPECIFIC KINEMATICS
GMK Sphere accommodates the best pattern of kinematic motion for each patient rather than imposing an assumed “norm”. This is achieved with:
“Ball in socket” stability throughout the range of motion in the medial compartment
Freedom of movement in the lateral compartment