Kunze KN, et al. - Through a retrospective comparative study of revision total knee arthroplasty (RTKA, a common and technically challenging procedure applied in cases wherein primary prostheses fail, often times secondary to increased flexion gap laxity, aseptic loosening, or severe varus-valgus instability) with the constrained condylar knee (CCK, thought to be the ideal choice when the deficit is deformity resulting in ligamentous laxity) or posterior stabilizing (PS) articulations, the researchers intended to distinguish different outcomes and survivorship in RTKA with PS or CCK articulations. For enhanced post-operative knee flexion and the knee society functional score, PS articulation was an independent predictor. When all-cause re-revision was the primary end-point, survivorship was markedly decreased for CCK revision articulations. The primary cause for re-revision in the CCK cohort was a repetitive/persistent infection of the operative knee, followed by aseptic loosening. PS articulations presented a lower likelihood of re-revision, however, articulation design was not correlated with complications or aseptic loosening. Hence, when compared to the CCK articulation following RTKA, the PS articulation when practiced for appropriate indication conferred superior survivorship for the primary end-point of all-cause re-revision and overall knee function. Furthermore, implant articulation was not observed as a predictor of aseptic loosening or complications.