Outcomes following Intra-Articular Hyaluronic Acid Injection for the Management of Hallux Rigidus: A Systematic Review

Category: Midfoot/Forefoot; Other Introduction/Purpose: The purpose of this systematic review was to evaluate outcomes following intra-articular 1st MTPJ hyaluronic acid injection for the management of hallux rigidus. Methods: During January 2023, the PubMed, Embase and Cochrane library databases were systematically reviewed to identify clinical studies evaluating outcomes in patients who underwent intra-articular 1st MTPJ hyaluronic acid injection for the management of hallux rigidus. Data regarding injection characteristics, subjective clinical outcomes, failure rates and complications were extracted and analysed. Results: In total, 5 studies were included in this review. In total, 209 patients underwent intra-articular 1st MTPJ hyaluronic acid injection for the management of hallux rigidus at a weighted mean follow-up of 4.4 ± 1.4 months. The weighted mean VAS improved from a pre-injection score of 6.4 ± 0.3 to a post-injection score of 2.8 ± 0.4. A 10.1% complication rate was noted, the most common of which was transient 1st MTPJ swelling. One infection (0.5%) was reported. A symptomatic recurrence rate of 18.6% was observed at a weighted mean time of 7.3 ± 4.2 months Conclusion: This systematic review demonstrated that intra-articular 1st MTPJ hyaluronic acid injection for the management of hallux rigidus led to a reduction in pain and a moderate complication rate at short-term follow-up. In addition, intra-articular 1st MTPJ hyaluronic acid injection for the management of hallux rigidus produced a symptomatic recurrence rate of 18.6% at approximately 7.3 months, suggesting that HA provides short-term relief. The lack of quality comparative studies limits the generation of robust conclusions, reinforcing the need for further research to identify the optimal role of HA in the management of hallux rigidus.