BACKGROUND: High-flexion TKA prostheses are designed to improve flexion and clinical outcomes. Increased knee flexion can increase implant loads and fixation stresses, creating concerns of @entity177 . Whether these goals can be achieved without @entity177 is unclear. QUESTIONS/PURPOSES: We assessed @entity158 relief, knee motion, function, incidence of @entity177 , and radiographic appearance in @entity1 with a mobile-bearing high-flexion TKA and determined whether preoperative knee flexion affects postoperative knee flexion. @entity1 AND METHODS: We prospectively followed all 142 @entity1 implanted with 154 mobile-bearing high-flexion TKAs between 2004 and 2007. We obtained Knee Society scores (KSS) and assessed radiographs for loosening. Minimum followup was 24 months (mean, 46 months; range, 24-79 months). RESULTS: Average knee flexion improved from 123   to 129  . @entity1 with preoperative flexion of 100   to 120   had a greater postoperative flexion increase (mean, 13  ; range, 114  -126  ) than @entity1 with preoperative flexion of greater than 120   (mean, 3.0  ; range, 128  -131  ). The mean KSS improved from 41 to 95 postoperatively. @entity1 with preoperative flexion of less than 120   had a greater improvement in KSS (62 versus 48). Posterior femoral radiolucent lines were observed in 43% without evidence of prosthetic loosening. CONCLUSIONS: Our data were similar to those reported in @entity1 implanted with traditional and other designs of high-flexion TKA. We found no increased incidence of @entity177 , although a higher than expected incidence of posterior femoral radiolucent lines merit continued observation. @entity1 with less preoperative motion were more likely to benefit from a high-flexion TKA.

Can a high-flexion total knee arthroplasty relieve XXXX and restore function without @entity177 ?

@entity177 :: ('MESH:D051437', 'Disease') :: ['premature failure', 'premature failures'] @entity1 :: ('9606', 'Species') :: ['Patients', 'patients', 'PATIENTS'] @entity158 :: ('MESH:D010146', 'Disease') :: ['pain']
@entity158 :: (MESH:D010146,Disease) :: ['pain']
