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- Title
The P.F.C. Sigma RP-F TKA Designed for Improved Performance: A Matched-pair Study.
- Authors
Gupta, Sanjay K.; Ranawat, Amar S.; Shah, Vineet; Zikria, Bashir A.; Zikria, Joseph F.; Ranawat, Chitranjan S.
- Abstract
The press fit condylar P.F.C. Sigma RP-F (rotating-platform, high flexion) knee is designed to provide a range of motion (ROM) of 155° without compromising wear, polyethylene contact stresses, patellofemoral tracking, or stability. The first 50 TKA surgeries using the Sigma RP-F knee performed at the author's institution were matched to 50 rotating-platform knees for age, sex, body mass index, preoperative diagnosis, duration of follow-up, and preoperative ROM to determine the effect of design on postoperative ROM. The mean increase in active ROM in the Sigma RP-F group was 17°, compared with 6° in the rotating-platform group (P =.0011). The mean increase in active ROM in patients who had less than 120° of preoperative motion was 27°in the Sigma RP-F group, compared with 16° in the rotating-platform group (P =.006). With the new P.F.C. Sigma RP-F design, greater ROM can be achieved independent of preoperative ROM.
- Subjects
TOTAL knee replacement; ARTHROPLASTY; KNEE surgery; ARTIFICIAL knees; ARTIFICIAL joints
- Publication
Orthopedics, 2006, Vol 29, pS49
- ISSN
0147-7447
- Publication type
Article