Use of the Straight Retrograde Intramedullary Nail for Tibiotalocalcaneal Arthrodesis: A Single-Institution, Single-Surgeon, Single-Implant Retrospective Series.

Background: The hindfoot fusion nail has become a popular implant for tibiotalocalcaneal (TTC) arthrodeses given its rigidity, ease of insertion, and potential for less invasive surgical approaches. The purpose of this study was to evaluate fusion and complication rates following the use of a straight, retrograde intramedullary nail for TTC arthrodeses, and the influence of diabetes and smoking on these results. Methods: A review of patient cases performed by a single surgeon at a single institution was performed. Variables included age, comorbidities, smoking history, BMI, hemoglobin A Results: Of 103 patients, there were 37 cigarette smokers and 30 diabetic patients. Eighty-three patients achieved union of all involved joints and 19 patients achieved union of 1 or 2 joints. Smokers demonstrated a 1.46 (risk ratio) (95% CI 1.03-2.07) times greater risk of nonunion but were not at an increased risk of experiencing surgical complications (0.86, 95% CI 0.56-1.33). Diabetic patients did not demonstrate an increased risk of nonunion (0.86, 95% CI 0.56-1.33) or complications (1.18, 95% CI 0.76-1.83). Conclusion: Because of increased nonunion risk, patients undergoing elective tibiotalocalcaneal arthrodesis should be counseled increased nonunion risks associated with smoking. In this series, we did not find a relationship between diabetes and complications or nonunion. Level of Evidence: Level III, retrospective cohort study.