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Effect of posterior condylar offset on clinical results after posterior-stabilized total knee arthroplasty / 中华创伤杂志(英文版)
Chinese Journal of Traumatology ; (6): 259-266, 2015.
Article in English | WPRIM | ID: wpr-316804
ABSTRACT
<p><b>PURPOSE</b>To determine the effect of the posterior condylar offset (PCO) on clinical results after total knee arthroplasty (TKA) using a high-flex posterior-stabilized (PS) fixed-bearing prosthesis.</p><p><b>METHODS</b>We prospectively studied the clinical and radiographic materials of 89 consecutive female patients (89 knees), who had undergone primary TKAs for end-stage osteoarthritis. All operations were performed by a single senior surgeon or under his supervision using the same operative technique. Based on the corrected PCO change, we divided all cases into two groups group A (corrected PCO change ≥0 mm, 58 knees) and group B (corrected PCO change<0 mm, 31 knees). One-year postoperatively, clinical and radiographic variables from the two groups were compared by independent t-test. The associations between the corrected PCO changes and the improvements of clinical variables in all patients were analyzed by Pearson linear correlation.</p><p><b>RESULTS</b>One-year postoperatively, the Knee Society Scores, the Western Ontario and McMaster Universities Osteoarthritis Index, non-weight-bearing active and passive range of knee flexion, flexion contracture, extensor lag, and their improvements had no statistical differences between the two groups (all p>0.05). The corrected PCO change was not significantly correlated with the improvement of any clinical variable (all p>0.05). Group A demonstrated greater flexion than group B during active weight bearing (p<0.05).</p><p><b>CONCLUSIONS</b>Restoration of PCO plays an important role in the optimization of active knee flexion during weight-bearing conditions after posterior-stabilized TKA, while it has no benefit to non-weight-bearing knee flexion or any other clinical result.</p>
Subject(s)
Full text: Available Index: WPRIM (Western Pacific) Main subject: Osteoarthritis / General Surgery / Biomechanical Phenomena / Prospective Studies / Range of Motion, Articular / Arthroplasty, Replacement, Knee / Knee Joint / Knee Prosthesis / Methods Type of study: Observational study Limits: Aged / Female / Humans Language: English Journal: Chinese Journal of Traumatology Year: 2015 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Main subject: Osteoarthritis / General Surgery / Biomechanical Phenomena / Prospective Studies / Range of Motion, Articular / Arthroplasty, Replacement, Knee / Knee Joint / Knee Prosthesis / Methods Type of study: Observational study Limits: Aged / Female / Humans Language: English Journal: Chinese Journal of Traumatology Year: 2015 Type: Article