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Generalized Ligamentous Laxity Is an Independent Predictor of Poor Outcomes After the Modified Brostr?m Procedure for Chronic Lateral Ankle Instability

 Kwang Hwan Park  ;  Jin Woo Lee  ;  Jae Wan Suh  ;  Myung Ho Shin  ;  Woo Jin Choi 
 American Journal of Sports Medicine, Vol.44(11) : 2975-2983, 2016 
Journal Title
 American Journal of Sports Medicine 
Issue Date
Adolescent ; Adult ; Ankle Joint/surgery* ; Arthroplasty/methods* ; Cohort Studies ; Female ; Humans ; Joint Instability/epidemiology ; Joint Instability/surgery* ; Ligaments, Articular/surgery* ; Male ; Muscular Diseases/etiology* ; Orthopedic Procedures/methods* ; Recurrence ; Retrospective Studies ; Risk Factors ; Treatment Failure ; Young Adult
ankle ; generalized ligamentous laxity ; instability ; modified Broström procedure ; prognosis
BACKGROUND: The modified Brostr?m procedure for chronic lateral ankle instability (CLAI) has presented outstanding clinical results. However, after the procedure, some patients with generalized ligamentous laxity have experienced a recurrence of ankle instability. PURPOSE: To understand the effect of generalized ligamentous laxity on prognosis and risk of recurrence in a cohort of patients with CLAI after the modified Brostr?m procedure. STUDY DESIGN: Cohort study; Level of evidence, 3. METHODS: A total of 199 ankles from 188 patients underwent the modified Brostr?m procedure for CLAI with a mean follow-up of 60.1 months (range, 48-108 months). Generalized ligamentous laxity was assessed in all patients. The Karlsson-Peterson ankle score (Karlsson score), talar tilt angle, and anterior displacement of the talus were used to evaluate clinical and radiological outcomes. Risk factors associated with clinical outcomes were evaluated using bivariate analysis and logistic regression analysis. Survival outcomes were compared using Kaplan-Meier analysis. RESULTS: Generalized ligamentous laxity was evident in 42 cases (21.1%). The average Karlsson score improved from 54.6 ± 7.1 preoperatively to 87.9 ± 7.2 at last follow-up (P < .001). The presence of generalized ligamentous laxity was significantly associated with poor clinical and radiological outcomes. The rates of clinical failure were 10.8% and 45.2% in the nonlaxity group and the laxity group, respectively (P < .001). According to bivariate analysis, generalized ligamentous laxity, syndesmosis widening, osteochondral lesion of the talus, high preoperative talar tilt angle (>15°), and high preoperative anterior displacement of the talus (>10 mm) were significantly associated with clinical failure. Multivariate logistic regression analysis revealed that generalized ligamentous laxity was the most important independent predictor of clinical failure after the modified Brostr?m procedure. The cumulative success rates for the nonlaxity group were significantly superior to those for the laxity group in Kaplan-Meier curves (P < .001). CONCLUSION: Generalized ligamentous laxity is an independent predictor of poor outcomes and a risk factor of recurrent instability following the modified Brostr?m procedure for CLAI.
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1. College of Medicine (의과대학) > Dept. of Orthopedic Surgery (정형외과학교실) > 1. Journal Papers
Yonsei Authors
박광환(Park, Kwang Hwan) ORCID logo https://orcid.org/0000-0002-2110-0559
신명호(Shin, Myung Ho)
이진우(Lee, Jin Woo) ORCID logo https://orcid.org/0000-0002-0293-9017
최우진(Choi, Woo Jin)
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