• Oliver N Schipper, Bruce E Cohen, William H Davis, John Kent Ellington, and Carroll P Jones.
• Anderson Orthopaedic Clinic, Arlington, VA; and.
• J Orthop Trauma. 2021 Jun 1; 35 (6): 296-299.

ObjectiveTo evaluate the rate of subtalar arthrodesis based on a computed tomography (CT) scan after open reduction and primary subtalar arthrodesis for acute, displaced, intra-articular calcaneal fractures.DesignRetrospective chart review.SettingSingle tertiary care practice.PatientsA retrospective chart review was performed to identify patients who sustained an acute, displaced, intra-articular calcaneal fracture and underwent open reduction and primary subtalar arthrodesis. Thirty-five patients participated in the study.InterventionEach patient included in the study was treated with open reduction and primary subtalar arthrodesis.Main Outcome MeasuresAll patients were evaluated with CT for arthrodesis of the posterior facet of the subtalar joint, which was quantitated. Other outcome measures included radiographic parameters, the Veterans RAND Item Health Survey, and the Foot and Ankle Ability Measure.ResultsThe median patient age was 47.8 years (range 21.5-79.5 years). The median patient follow-up was 34.4 months (range 4.6-104.1 months). The Sanders classification was as follows: 3% (1/35) type II, 40% (14/35) type III, and 57% (20/35) type IV. Based on a CT scan, primary subtalar union occurred in 94.3% (33/35) of patients.ConclusionsOpen reduction and primary subtalar arthrodesis for acute, displaced, intra-articular calcaneus fractures has a high rate of union and good pain and function outcomes. It should be strongly considered for patients with significant cartilage injury and comminution of the posterior facet.Level Of EvidenceTherapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.Copyright © 2020 Wolters Kluwer Health, Inc. All rights reserved.

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