Background: Calcaneal fracture malunion (CFM) commonly occurs with multiple pathologic changes and progressive pain and difficulty walking. The purpose of this study was to propose a modified 3-plane joint-preserving osteotomy for the treatment of CFM with subtalar joint incongruence, and to compare its efficacy to subtalar arthrodesis.
Methods: A retrospective comparative analysis of the data of 56 patients with CFM admitted from January 2017 to December 2022 was performed. Twenty-six patients were in the osteotomy group and 30 in the arthrodesis group. Computed tomographic (CT) scans were used for measurement of the intraarticular steps. Radiologic parameters, visual analog scale (VAS) score for pain, 12-Item Short Form Health Survey (SF-12) mental component summary (MCS) and physical component summary (PCS) scores were compared between the 2 groups of patients to assess the outcome preoperatively and at last follow-up, which averaged 22.6 ± 3.6 months and 27.6 ± 3.6 months for the osteotomy and arthrodesis groups, respectively.
Results: Improvements in pain, function, and overall quality of life were obtained in both groups compared with the preoperative values at last follow-up. The VAS and SF-12 scores were similar between the groups at the last follow-up. In the osteotomy group, the average CT scan-measured intraarticular step-offs were significantly reduced from 3.7 ± 1.2 mm to 0.9 ± 0.3 mm. The osteotomy group showed improvement in pronation and supination range of motion (ROM) of the feet ( < .01). The correction of the ankle height and Meary angle were slightly better in the osteotomy group.
Conclusion: In this short-term follow-up study, good results were achieved in both joint-preserving osteotomy and subtalar arthrodesis groups for the treatment of CFM with subtalar joint incongruence. The osteotomy group preserved the subtalar joint and achieved improvements in pronation and supination ROM.
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