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  • Title: Comparison of bone tunnel and suture anchor techniques in the modified Broström procedure for chronic lateral ankle instability.
    Author: Hu CY, Lee KB, Song EK, Kim MS, Park KS.
    Journal: Am J Sports Med; 2013 Aug; 41(8):1877-84. PubMed ID: 23729687.
    Abstract:
    BACKGROUND: The modified Broström procedure is frequently used to treat chronic lateral ankle instability. There are 2 common methods of the modified Broström procedure, which are the bone tunnel and suture anchor techniques. PURPOSE: To compare the clinical outcomes of the modified Broström procedure using the bone tunnel and suture anchor techniques. STUDY DESIGN: Cohort study; Level of evidence, 2. METHODS: Eighty-one patients (81 ankles) treated with the modified Broström procedure for chronic lateral ankle instability constituted the study cohort. The 81 ankles were divided into 2 groups, namely, a bone tunnel technique (BT group; 40 ankles) and a suture anchor technique (SA group; 41 ankles). The Karlsson score, American Orthopaedic Foot and Ankle Society (AOFAS) ankle-hindfoot score, anterior talar translation, and talar tilt angle were used to evaluate clinical and radiographic outcomes. The BT group consisted of 32 men and 8 women with a mean age of 34.8 years at surgery and a mean follow-up duration of 34.2 months. The SA group consisted of 33 men and 8 women with a mean age of 33.3 years at surgery and a mean follow-up duration of 32.8 months. RESULTS: Mean Karlsson scores improved significantly from 57.0 points preoperatively to 94.9 points at final follow-up in the BT group and from 59.9 points preoperatively to 96.4 points at final follow-up in the SA group. Mean AOFAS scores also improved from 64.2 points preoperatively to 97.8 points at final follow-up in the BT group and from 70.3 points preoperatively to 97.4 points at final follow-up in the SA group. Mean anterior talar translations in the BT group and SA group improved from 9.0 mm and 9.2 mm preoperatively to 6.5 mm and 6.8 mm at final follow-up, respectively. Mean talar tilt angles were 12.0° in the BT group and 12.5° in the SA group preoperatively and 8.8° at final follow-up for both groups. No significant differences were found between the 2 groups in terms of the Karlsson score, AOFAS score, anterior talar translation, and talar tilt angle. CONCLUSION: The bone tunnel and suture anchor techniques of the modified Broström procedure showed similar good functional and radiographic outcomes. Both techniques appear to be effective and reliable methods for the treatment of chronic lateral ankle instability.
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