High-flexion total knee arthroplasty improves flexion of stiff knees

被引:20
作者
Lee, Bum-Sik [1 ]
Kim, Jong-Min [1 ]
Lee, Sang-Jin [1 ]
Jung, Kwang-Hwan [2 ]
Lee, Dae-Hee [3 ]
Cha, Eun-Jong [4 ]
Bin, Seong-Il [1 ]
机构
[1] Univ Ulsan, Coll Med, Dept Orthopaed Surg, Asan Med Ctr, Seoul 138736, South Korea
[2] Ulsan Univ Hosp, Dept Orthopaed Surg, Ulsan 682714, South Korea
[3] Korea Univ, Coll Med, Dept Orthopaed Surg, Anam Hosp, Seoul 136705, South Korea
[4] Chungbuk Natl Univ, Coll Med, Dept Biomed Engn, Cheongju 361763, Chungcheongbuk, South Korea
关键词
Total knee arthroplasty; High-flexion implants; Maximal flexion; Stiff knee; POSTERIOR CONDYLAR OFFSET; LOG-LINEAR REGRESSION; OPTIMIZING FLEXION; PREDICTING RANGE; MOTION; STANDARD; DESIGN; REPLACEMENT; KINEMATICS; PROSTHESES;
D O I
10.1007/s00167-010-1272-4
中图分类号
R826.8 [整形外科学]; R782.2 [口腔颌面部整形外科学]; R726.2 [小儿整形外科学]; R62 [整形外科学(修复外科学)];
学科分类号
摘要
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. The postoperative maximum flexion was compared in osteoarthritis patients with a preoperative maximum flexion of 100A degrees or less, using LPS and LPS-flex implants (NexGenA (R); 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. Two years after operation, the LPS-flex group had a mean postoperative maximum flexion of 131 +/- A 10A degrees (range, 105-140A degrees), which was significantly higher than the 121 +/- A 12A degrees (range, 95-140A degrees) 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 140A degrees postoperatively, but in the LPS group only five knees (13%) achieved a maximum flexion of 140A degrees. 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.
引用
收藏
页码:936 / 942
页数:7
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