It has been shown that a significant percentage of patients who "sprain" their ankle sustain a permanent disability.* In fact, Hughes has shown that in 57 cases of injury to the ankle without bony damage about 50% of the patients showed some tilting of the talus when roentgenograms were made with the ankle in forced inversion. Most authors † state that tears of the fibular collateral ligament of the ankle severe enough to be demonstrable roentgenologically in forced inversion should be treated in plaster for 6 to 10 weeks. If the injury to the ligaments is extensive (complete tear of the anterior talofibular and calcaneofibular ligaments), it has been suggested that the ligament be repaired primarily.5
There is a group of patients who eventually have chronic subluxating ankles. Some few patients who sustain severe ligamentous injuries may have to be classed in this group, in spite of proper immobilization
KELLEY JH, JANES JM. The Chronic Subluxating Ankle. AMA Arch Surg. 1956;72(4):618–621. doi:https://doi.org/10.1001/archsurg.1956.01270220066008
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