Hybrid component fixation in revision total knee arthroplasty.

UNLABELLED: We retrospectively analyzed the midterm survivor rate of revision total knee arthroplasty using hybrid stem fixation. We included 33 patients, 21 women and 12 men with an average age of 68 years (range, 57-80 years). Revision was performed for aseptic loosening in 16 patients, aseptic loosening and knee instability in five patients, instability in seven patients, infection in three patients, and postoperative stiffness and pain in two patients. The average follow-up was 38 months. Three knees (9%) were revised during the follow-up period. Two patients (6%) underwent revision for aseptic loosening and one patient (3%) for deep implant infection. The average knee score improved from 42 points (range, 10 to 60) to 83 points (range, 60 to 100). The average functional score improved from 48 points (range, 15-65 points) to 76 points (range, 46-99 points). All patients had no pain (13%) or moderate/occasional pain (87%) during walking. The average ROM improved from 94 degrees (range, 45 degrees-125 degrees) to 105 degrees (range, 70 degrees-125 degrees). Hybrid component fixation is a useful treatment option in revision total knee arthroplasty. The revision rate for aseptic loosening within a three year follow-up is 6%. LEVEL OF EVIDENCE: Therapeutic study, level IV (case series). See the Guidelines for Authors for a complete description of levels of evidence.