Determining the change in functional outcome score and CT fusion ratio following arthroscopic subtalar arthrodesis: A prospective observational study

Q2 Medicine

Journal of Clinical Orthopaedics and Trauma Pub Date : 2026-01-01 Epub Date: 2025-11-20 DOI:10.1016/j.jcot.2025.103280

Bishwa Bandhu Niraula , Anil Regmi , Shivam Bansal , Saptarshi Barman , Rohan Gowda , Pradeep Kumar Meena

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引用次数: 0

Abstract

Background

This study aimed to evaluate the change in foot and ankle functional outcome scores and the CT fusion ratio after Posterior Arthroscopic Subtalar Arthrodesis (PASTA) in patients with isolated subtalar arthritis.

Methods

A prospective observational study was conducted from March 2021 to March 2023, enrolling 20 patients (12 males, 8 females) with posttraumatic or degenerative isolated subtalar arthritis. Functional outcomes were assessed at 6 weeks, 3 months, and 6 months postoperatively using AOFAS, FADI, FAOS, and VAS scores. Fusion was assessed via CT scan at 6 months to calculate the CT fusion ratio.

Results

Functional outcomes significantly improved over time. The mean AOFAS score increased from 48.0 ± 8.53 preoperatively to 83.8 ± 9.73 at 6 months. The mean FADI and FAOS scores improved from 42.85 ± 7.11 and 43.35 ± 8.78 preoperatively to 86.5 ± 11.38 and 86.75 ± 11.15, respectively, at 6 months. The VAS score decreased from a mean of 4.9 ± 0.89 at 6 weeks to 1.6 at 6 months. The mean CT fusion ratio at 6 months was 65.39 % ± 13.98 %. Only one patient showed a fusion ratio below 33 % and later required ankle arthrodesis. A significant positive correlation was observed between CT fusion ratio and AOFAS (ρ = 0.64, p = 0.002), FADI (ρ = 0.55, p = 0.010), and FAOS (ρ = 0.45, p = 0.043). Most patients rated satisfaction as “excellent” at final follow-up. Minor complications such as transient pain and swelling were observed but resolved over time.

Conclusion

Arthroscopic subtalar arthrodesis significantly improved functional outcomes and demonstrated a high CT fusion rate with minimal complications in patients with isolated subtalar arthritis.

Level of evidence

Level III.

Abstract Image

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确定关节镜距下关节融合术后功能结局评分和CT融合率的变化：一项前瞻性观察研究

本研究旨在评估孤立性距下关节炎患者后路关节镜距下关节融合术（PASTA）后足部和踝关节功能评分和CT融合率的变化。方法前瞻性观察研究于2021年3月至2023年3月进行，纳入20例创伤后或退行性孤立距下关节炎患者（男性12例，女性8例）。分别在术后6周、3个月和6个月使用AOFAS、FADI、FAOS和VAS评分评估功能结局。6个月时通过CT扫描评估融合情况，计算CT融合率。结果：随着时间的推移，功能预后显著改善。平均AOFAS评分由术前的48.0±8.53分上升至6个月时的83.8±9.73分。6个月时，FADI和FAOS平均评分分别从术前的42.85±7.11和43.35±8.78提高到86.5±11.38和86.75±11.15。VAS评分从6周时的平均4.9±0.89降至6个月时的1.6。6个月平均CT融合率为65.39%±13.98%。只有1例患者融合率低于33%，随后需要进行踝关节融合术。CT融合率与AOFAS （ρ = 0.64, p = 0.002）、FADI （ρ = 0.55, p = 0.010）、FAOS （ρ = 0.45, p = 0.043）呈正相关。在最后的随访中，大多数患者的满意度为“优秀”。观察到轻微的并发症，如短暂的疼痛和肿胀，但随着时间的推移而消退。结论关节镜下距下关节融合术可显著改善孤立性距下关节炎患者的功能预后，CT融合率高，并发症少。证据等级：III级。

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来源期刊

Journal of Clinical Orthopaedics and Trauma Medicine-Orthopedics and Sports Medicine

CiteScore

4.30

自引率

0.00%

发文量

181

审稿时长

92 days

期刊介绍： Journal of Clinical Orthopaedics and Trauma (JCOT) aims to provide its readers with the latest clinical and basic research, and informed opinions that shape today''s orthopedic practice, thereby providing an opportunity to practice evidence-based medicine. With contributions from leading clinicians and researchers around the world, we aim to be the premier journal providing an international perspective advancing knowledge of the musculoskeletal system. JCOT publishes content of value to both general orthopedic practitioners and specialists on all aspects of musculoskeletal research, diagnoses, and treatment. We accept following types of articles: • Original articles focusing on current clinical issues. • Review articles with learning value for professionals as well as students. • Research articles providing the latest in basic biological or engineering research on musculoskeletal diseases. • Regular columns by experts discussing issues affecting the field of orthopedics. • "Symposia" devoted to a single topic offering the general reader an overview of a field, but providing the specialist current in-depth information. • Video of any orthopedic surgery which is innovative and adds to present concepts. • Articles emphasizing or demonstrating a new clinical sign in the art of patient examination is also considered for publication. Contributions from anywhere in the world are welcome and considered on their merits.