STABILITY FOR LIFE
Despite the excellent longevity of total knee arthroplasty,
many patients continue to experience functional deficits after surgery.
Patient expectations are not as well fulfilled by TKA as by total hip replacement with fewer knee patients achieving a “forgotten joint” replacement. Studies show that around 20% of TKA patients are not satisfied[1, 2, 3]. Excessive A/P motion may result in anterior knee pain and continued swelling. In many P/S designs, the stabilising mechanism only engages after 70-80° of flexion leaving the knee vulnerable to A/P instability during the most commonly encountered functional activities
In a study in which patients had a conventional CR or PS in one knee and a medially stabilised device in the other, 76% preferred the knee with the “ball in socket” medial compartment. Patients reported:
It feels more normal
It is stronger when ascending/descending stairs
It has superior single-leg weight bearing
It feels more stable during flexion and overall
There are fewer clunks, pops and clicks
Based on the knee anatomy and kinematic studies performed by Prof. Michael Freeman and Prof. Vera Pinskerova, the GMK Sphere is an innovative total knee implant designed to deliver maximum functional stability with the goal of increasing TKA patient satisfaction during activities of daily living and decreasing post-operative knee pain.RESPONSIBLE INNOVATIONMedacta is committed to providing innovative and safe solutions for patients with an evidence-based approach.