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>
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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