Functional outcome of medial subtalar dislocation without articular fractures

Introduction: Subtalar dislocation is a rare injury around foot and ankle. Most common mode of injury is high energy trauma (road traffic accident, fall from height and sports activities) (Saini R, Dhillon MS, Gill SS. Congenital subtalar dislocation-a case report. Foot 19; Kaufmann RA, Davidson R, McCarthy J. Bilateral congenital subtalar dislocation: A case report. Clin Orthop Relat Res 397). It is commonly seen in young men and the mechanism is inversion injury in plantar-flexed foot. Medial type dislocation is most commonly seen with incidence between 65% and 85% as stated in various studies. Pure ligamentous injuries have shown good prognosis, which when associated with fractures can affect the functional outcome. Methods: We conducted a prospective study from 1st January 2017 to 1st December 2020 including seven patients (5 males and 2 females) with closed medial subtalar dislocation with (1) or without fractures (6). In our study, closed reduction was performed in all cases. At final follow-up, functional outcome was evaluated using “AOFAS-AHFS score” and radiological assessment. Results: All seven patients had good functional outcome at final follow-up and found no difficulty in doing daily routine activities. Routine clinical and radiological assessments were also done at final follow-up. All patients had complete ROM at final follow-up. Conclusion: Closed medial subtalar dislocation without significant articular fractures has good outcome in terms of function if managed properly.