Hindfoot Endoscopy for Posterior Ankle Impingement

van Dijk, C. N.; de Leeuw, P. A. J.; Scholten, P. E.
October 2009
Journal of Bone & Joint Surgery, American Volume;Oct2009 Supplement 2, Vol. 91-A Issue 2, p287
Academic Journal
BACKGROUND: The surgical treatment of posterior ankle impingement is associated with a high rate of complications and a substantial time to recover. An endoscopic approach to the posterior ankle (hindfoot endoscopy) may lack these disadvantages. We hypothesized that hindfoot endoscopy causes less morbidity and facilitates a quick recovery compared with open surgery. METHODS: Fifty-five consecutive patients with posterior ankle impingement were treated with an endoscopic removal of bone fragments and/or scar tissue. The symptoms were caused by trauma (65%) or overuse (35%). All patients were enrolled in a prospective protocol. At baseline, the age, sex, work and sports activities, American Orthopaedic Foot and Ankle Society (AOFAS) hindfoot scores, and preinjury Tegner scores were determined for all patients. At the time of follow- up, AOFAS hindfoot scores and Tegner scores were assessed and the time to return to work and sports activities was determined. Complications were recorded. Patients scored the overall result as poor, fair, good, or excellent by means of a 4-point Likert scale. RESULTS: The median duration of follow-up was thirty-six months, and no patient was lost to follow-up. The median AOFAS hindfoot score increased from 75 points preoperatively to 90 points at the time of final follow-up. The median time to return to work and sports activities was two and eight weeks, respectively. At the time of follow-up, patients in the overuse group were more satisfied than those in the posttraumatic group, and the AOFAS hindfoot scores were higher in patients in the overuse group (median, 100 points) compared with patients in the posttraumatic group (median, 90 points). A complication occurred in one patient who had a temporary loss of sensation of the posteromedial aspect of the heel. CONCLUSIONS: The outcome after endoscopic treatment of posterior ankle impingement compares favorably with the results of open surgery reported in the literature. Hindfoot endoscopy appears to cause less morbidity than open ankle surgery and facilitates a quick recovery. Patients treated for posterior ankle impingement caused by overuse have better results than those treated following trauma. LEVEL OF EVIDENCE: Therapeutic Level IV. See Instructions to Authors for a complete description of levels of evidence.


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