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- Title
High-flexion total knee arthroplasty improves flexion of stiff knees.
- Authors
Bum-Sik Lee; Jong-Min Kim; Sang-Jin Lee; Kwang-Hwan Jung; Dae-Hee Lee; Eun-Jong Cha; Seong-Il Bin
- Abstract
Purpose: High-flexion knee prosthesis designs are generally thought to be of benefit only in patients with a satisfactory preoperative flexion angle. The aim of the study was to evaluate whether high-flexion designs were indeed worthless in osteoarthritis patients with severe preoperative flexion limitation. Methods: The postoperative maximum flexion was compared in osteoarthritis patients with a preoperative maximum flexion of 100° or less, using LPS and LPS-flex implants (NexGen®; Zimmer, Warsaw, IN) in total knee arthroplasties. Data on 39 knees in the LPS group and 41 in the LPS-flex group, with a minimum of 2 years of follow-up, were reviewed retrospectively, focused on the postoperative maximum flexion. Results: Two years after operation, the LPS-flex group had a mean postoperative maximum flexion of 131 ± 10° (range, 105-140°), which was significantly higher than the 121 ± 12° (range, 95-140°) in the LPS group ( P < 0.001). In the LPS-flex group, about half of the knees ( n = 18, 44%) could achieve a maximum flexion of 140° postoperatively, but in the LPS group only five knees (13%) achieved a maximum flexion of 140°. Conclusion: Despite a different period of the operation between groups, this study suggested that osteoarthritis patients with severe preoperative flexion limitation could achieve more postoperative gain in flexion when a high-flexion prosthesis was used, compared to the flexion obtained using a standard prosthesis.
- Publication
Knee Surgery, Sports Traumatology, Arthroscopy, 2011, Vol 19, Issue 6, p936
- ISSN
0942-2056
- Publication type
Academic Journal
- DOI
10.1007/s00167-010-1272-4