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KMID : 0950120100090020098
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Jouranl of Korean Orthopaedic Sports Medicine
2010 Volume.9 No. 2 p.98 ~ p.103
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Arthroscopically Assisted Lateral Release and Medial Imbrication for Recurrent Patella Dislocation
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Kang Sung-Shik
Yoo Jae-Doo
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Abstract
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Purpose: We reported the results of arthroscopically assisted lateral release and medial imbrication for the recurrent patella dislocation.
Materials and Methods: Twenty patients (20 knees) underwent arthroscopically assisted surgery for the recurrent patella dislocation. There were 4 males and 16 female. The average age was 20.2 years. All patients had definite trauma history and average follow-up period was 19 months. The surgical results were evaluated according to the Lysholm knee score and the Kujala score. The congruence angle and lateral patellofemoral angle were measured on plain radiograph and the tibial tubercletrochlear groove distance was calculated on computerized tomography.
Results: The median value of preoperative congruence angle was 16.5˚(range, 0.0~+34˚) and the average final follow-up was -6.4˚(range,-19~10˚) with statistically significant improvement (p=0.025). The median value of preoperative Lysholm knee score was 70 (range, 63~81) and the final follow-up score had changed to 88 (range, 80~95) with statistically significant improvement (p=0.0341). The median value of preoperative Kujala score was 72 (range, 65~80) and the average final follow-up score showed 87 (range, 80~92) with statistically significant improvement (p=0.024). Recurrent dislocations after surgery occurred in 2 cases, one case which showed positive “thumb to forearm test”had been treated with medial patellofemoral ligament reconstruction.
Conclusion: Arthroscopically assisted lateral release and medial imbrication for recurrent patella dislocation without bony malaligmenent showed the effective treatment ,but would be inappropriate for the patients with the generalized joint laxity.
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KEYWORD
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Patella, Recurrent dislocation, Medial imbrication, Lateral release
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