High-flexion total knee arthroplasty improves flexion of stiff knees
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : Bum-Sik Lee • Jong-Min Kim • Sang-Jin Lee • Kwang-Hwan Jung • Dae-Hee Lee • Eun-Jong Cha • Seong-Il Bin
- چاپ و سال / کشور: 2010
Description
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 followup, 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 highflexion prosthesis was used, compared to the flexion obtained using a standard prosthesis
Knee Surg Sports Traumatol Arthrosc (2011) 19:936–942 DOI 10.1007/s00167-010-1272-4 Received: 5 January 2010 / Accepted: 9 September 2010 / Published online: 2 October 2010
