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- Title
Preoperative flexion does not influence postoperative flexion after rotating-platform total knee arthroplasty.
- Authors
Russell, Robert; Huo, Michael; Jong, Leslie; Jones, Richard
- Abstract
Purpose: Preoperative range of motion (ROM) has been regarded as one of the most important factors in predicting postoperative ROM following total knee arthroplasty (TKA). Mobile-bearing TKA designs have been suggested to possibly improve the knee kinematics compared to fixed-bearing designs. The purpose of this study was to examine the difference in postoperative flexion as a function of preoperative flexion in a consecutive series of TKAs done using a posterior-stabilized rotating-platform prosthesis. Methods: ROM was assessed in 153 consecutive TKAs done using a rotating-platform posterior cruciate-substituting design. Patients were divided into two groups based on their preoperative ROM (Group 1 < 95°, Group 2 > 95°). The Knee Society Score (KSS) and ROM were assessed preoperatively, 3 months and 12 months postoperatively. Results: There was no difference in flexion 12 months after surgery between groups (mean 120° and 123°, respectively. n.s.). After 3 month follow-up, no increase in ROM was experienced by either group. Patients in Group 1 experienced significantly greater increases in both ROM ( p < 0.001) and KSS ( p < 0.05). There was no difference in the KSS at 12 months after surgery between groups. Conclusion: In this series of patients undergoing TKA with a rotating-platform prosthesis, the preoperative ROM was not predictive of the postoperative ROM. Patients with stiff knees preoperatively may benefit from a mobile-bearing design prosthesis. Level of evidence: Case-control study, Level III.
- Subjects
KNEE surgery; JOINT hypermobility; TOTAL knee replacement; PREOPERATIVE care; ARTIFICIAL joints; POSTOPERATIVE care
- Publication
Knee Surgery, Sports Traumatology, Arthroscopy, 2014, Vol 22, Issue 7, p1644
- ISSN
0942-2056
- Publication type
Article
- DOI
10.1007/s00167-013-2378-2