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RESULTS OF FLATFOOT TREATMENT WITH A SUBTALAR SCREW
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Abstract
Background: Subtalar arthrodesis with a screw is a minimally invasive surgical technique that is recognized as highly effective in the treatment of flatfoot. However, there has not been a comprehensive summary or evaluation of this technique in the Vietnamese population to determine its suitability. Objective: To evaluate the results of surgical treatment for symptomatic idiopathic flatfoot using a subtalar screw at the time points of pre-surgery, 6 weeks post-surgery, and the final follow-up examination. Methods and materials: This study used a descriptive case series design, observing 11 patients under 16 years of age with symptomatic flatfoot who had failed non-operative treatment and subsequently underwent subtalar arthrodesis surgery using a screw. Results: The mean Talo-First Metatarsal Angle on AP view (T1M) was 2.67 ± 0.400 post-surgery, compared to 32.07 ± 2.080 pre-surgery. The mean Anteroposterior Talonavicular Coverage Angle (APTN) post-surgery was 12.54 ± 0.760 compared to 23.29 ± 1.110 pre-surgery. Preoperative Talonavicular Uncoverage (TNU) was categorized as moderate and severe at 45.5% and 54.5%, respectively, while postoperative TNU was categorized as mild and normal at 36.4% and 63.6%, respectively. The Meary's Angle (MA) post-surgery was 7.7 ± 0.320 compared to 23.3 ± 1.280 pre-surgery. The Calcaneal Pitch Angle (CP) was 15.62 ± 1,020 compared to 11.32 ± 0.950 pre-surgery. The mean Lateral Talocalcaneal Angle (LTC) post-surgery was 41.27 ± 0.760, compared to 46.1 ± 6.890 pre-surgery. The mean Talar Declination Angle (TD) was 17.91 ± 0.910, compared to 30.17 ± 3,790 pre-surgery. The mean American Orthopaedic Foot and Ankle Society (AOFAS) score post-surgery was 90.55 ± 2,54 (range 85 to 95), which was an improvement compared to the pre-surgery mean of 69.95 ± 2.210. Conclusion: Flatfoot treatment using a subtalar screw is a less invasive surgical procedure with a low risk of complications. Both clinical symptoms and anatomical structures observed on X-ray images showed significant improvement.
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Keywords
flatfoot, AOFAS, subtalar screw, subtalar arthrodesis
References
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