Vastus medialis advancement provides good clinical and functional outcomes for lateral patellofemoral instability
DOI:
https://doi.org/10.1016/j.rccot.2017.09.005Keywords:
patellofemoral lateral instability, vastus medialis advancement, treatmentAbstract
Background: Patellofemoral lateral instability is a condition of multifactorial origin, and has multiple options for its treatment. Vastus medialis advancement with arthroscopic assisted lateral retinacle replication (AALRR) is performed when there is no alteration of alignment or bone structure. The purpose of this study is to evaluate the clinical and functional results of patients with patellofemoral lateral instability (PFLI) treated with AALRR.
Material and methods: A descriptive, cross-sectional study was conducted from September 2014 to January 2016 on patients with PFLI treated with AALRR. The results before surgery and 12months after surgery, were evaluated using the Tegner-Lysholm and Kujala scales.
Results: The study included 6 patients, 5women (83.3%), and 1man (16.7%). The median age at first dislocation was 15.83 (7-30) ±8.47years. The affected knees were 4right (66.7%) and 2left (33.3%). The mean time from first dislocation to surgery was 10.08 (0.5-17) ±5.16years. The pre- and post-surgical evaluations using the Tegner-Lysholm and Kujala scales for the affected gender and side showed no statistically significant differences (P>.05). The pre-surgical median of the Tegner-Lysholm scale was 37.50 (6-78) ±26.66, and post-surgical, 88.17 (77-99) ±7.73 (P=.028). The pre-surgical and post-surgical median of the Kujala scale was 36.67 (2-77) ±29.703, and 84.83 (75-100) ±9.368, respectively (P=.027). The mean follow-up was 14.0 (12-18) ±2.44months.; Post-surgical apprehension was 100% negative. All patients responded that they would have a further operation in case of presenting with the symptoms again.
Discussion: The AALRR for the management of PFLI in patients without bone malformations or misalignment offers good clinical results.
Evidence level: IV.
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