Combined PCL and PLC reconstruction in chronic posterolateral instability |
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Authors: | Claudio Zorzi Mahbub Alam Venanzio Iacono Vincenzo Madonna Donato Rosa Nicola Maffulli |
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Institution: | 1. Department of Orthopaedics and Traumatology, Knee Surgery Centre, Hospital “Sacro Cuore—Don Calabria”, Negrar, Verona, Italy 2. Department of Orthopaedic Surgery, Colchester Hospital University NHS Trust, Turner Road, Colchester, Essex, CO4 5JL, UK 3. Biomechanics Section, Department of Mechanical Engineering, Imperial College London, London, SW7 2AZ, UK 4. Department of Orthopaedics, Faculty of Medicine and Surgery, University of Naples Federico II, Naples, Italy 5. Centre for Sports and Exercise Medicine, Queen Mary University of London, Barts The London School of Medicine and Dentistry, Mile End Hospital, 275 Bancroft Road, London, E1 4DG, UK
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Abstract: | Purpose The posterolateral corner (PLC) is more likely to be injured in combination with the posterior cruciate ligament (PCL) or the anterior cruciate ligament than in isolation. This leads to instability of the knee and loss of function. We hypothesised that combined PCL and PLC reconstruction would restore sufficient stability to allow improvement in patient symptoms and function. Methods 19 patients who underwent arthroscopic-assisted single-bundle PCL and PLC reconstruction by a single surgeon were analysed retrospectively. The PLC reconstruction was a modified Larson reconstruction of the lateral collateral ligament and the popliteofibular ligament. The IKDC and Tegner scores were used to assess outcome. Dial test and varus laxity were used to assess improvements in clinical laxity. Posterior laxity was tested using the KT-1000. Results The mean follow-up was 38 months (±(2× standard deviations), ±12.3). There were no postoperative complications. All patients had less than 5 mm posterior step-off. 17 of 19 patients had negative dial and varus stress tests. Measured range of motion was reduced by a mean of 10°, but patients did not report any daily activities restrictions. Tegner scores improved from a median pre-operative value of 2 (range 1–4) to 6 (4–9) at final follow-up. The mean postoperative IKDC score was 86 (±11). Conclusions Subjectively, the knee stability achieved allowed daily activities. However, there were remaining abnormalities in range of motion, posterior drawer and rotational laxity, suggesting that normal knee laxity was not restored. Level of evidence IV. |
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