J Korean Fract Soc.  2019 Jul;32(3):121-127. 10.12671/jkfs.2019.32.3.121.

Computed Tomography Image Analysis of the Fusion Site of Subtalar Arthrodesis for Traumatic Arthritis after a Displaced Intraarticular Calcaneal Fracture

Affiliations
  • 1Department of Orthopaedic Surgery, Gil Medical Center, Gachon University College of Medicine, Incheon, Korea. oselite@gilhospital.com

Abstract

PURPOSE
The study examined the fusion site and characteristics of the subtalar arthrodesis after intraarticular calcaneal fractures using computed tomography.
MATERIALS AND METHODS
The clinical results and computed tomographic analysis of the fusion site were reviewed in 18 patients who were followed-up for a minimum of six months after undergoing subtalar arthrodesis due to traumatic arthritis caused by an intra-articular calcaneal fracture from December 2012 to April 2017.
RESULTS
An evaluation of clinical results after subtalar arthrodesis revealed statistically significant improvements. In all cases, arthritis was found in the injured articular surface, which was displaced superolaterally from the initial primary fracture line of the calcaneus. Six months after arthrodesis, the subtalar fusion rate was 80.0% (16/20). Of these, 14 cases had a cannulated screw inserted in the uninjured site that is medial to the primary fracture line. Joint fusion was observed on the uninjured articular surface in 17 cases (85.0%).
CONCLUSION
Joint fusion was initially achieved at the uninjured posterior facet after subtalar arthrodesis due to traumatic arthritis caused by a displaced intra-articular calcaneal fracture. This suggests that meticulous surgical techniques and cannulated screw positioning at the uninjured site will promote joint fusion.

Keyword

Calcaneus; Fractures; Intra-articular; Subtalar joint; Arthritis; Computed tomography; Arthrodesis
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