Abstract
Category:HindfootIntroduction/Purpose:Open subtalar arthrodesis is a standard treatment for subtalar joint arthritis. Recently, posterior arthroscopic subtalar arthrodesis (PASTA) has been introduced and gained increasing popularity due to fasten recovery time and better cosmesis. However, there is limited current studies to report outcomes and complications between the two techniques. The purpose of this study is to compare outcomes and complications between open and PASTA techniques.Methods:A prospective, randomized collected data of 56 consecutive patients who were diagnosed with isolated subtalar arthritis and underwent either open (28 patients) or PASTA (28 patients) between 2016 and 2019 were enrolled in this study. The minimum follow-up time to be included in this study was 12 months. The primary outcome was union rate which was confirmed by post-operative CT scan. The secondary outcomes were union time, VAS, SF-36, FAAM, tourniquet times, and complications. A paired sample t-test was used to assess statistical differences between pre- and post-operative functional outcomes (VAS, SF-36, and FAAM) in the same group of both open and PASTA techniques while an independent t-test was used to compare functional outcomes (VAS, SF-36, and FAAM) between the two techniques. Results were significance at p < 0.05. Descriptive statistics were used for the demographic variables.Results:There were 56 patients (44 male and 12 female) with mean follow-up time was 17.7 months and 17.5 months for open and PASTA. The union time was significantly shorter in PASTA (9.4 vs 12.8 weeks, p<0.05). PASTA demonstrated significantly fasten recovery times (p<0.05 all) including time to return to ADL (8.4 vs 10.8 weeks), work (9.4 vs 12.8 weeks), and sports (9.4 vs 12.8 weeks). Both Open and PASTA techniques demonstrated significant improvement of all functional outcomes (FAAM, SF- 36, and VAS (p<0.01 all)); however, there was no significant difference between the two techniques. Other outcomes were not significant difference including tourniquet times (55.8 vs 67.2 minutes) and union rates (96.3 vs 100%) and complications.Conclusion:Both open and PASTA techniques demonstrated significant improvement of pain and function for treatment of patients with isolated subtalar joint arthritis. Although there was no significant difference of short-term of functional outcomes and complications, PASTA technique was better in term of shorten time to union and fasten time to return to sports.
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