Single vs Triple Hyaluronic Acid in Knee Osteoarthritis

Summary

The goal of this clinical trial is to directly compare two hyaluronic acid injection protocols in adults with knee osteoarthritis: a single intra-articular injection of Innoryos 2.5% (Single-Shot) and a three-week injection series of Innoryos 2.2% (Triple-Shot). The study aims to determine whether the single injection provides comparable safety, pain relief, and improvement in knee function to the triple-injection protocol. The main questions are: * How do the single-shot and triple-shot protocols compare in terms of pain reduction and functional improvement? * How do their safety and tolerability profiles compare? * What medical problems occur with each protocol? Participants (n = 46) will receive either the single 4.8 ml injection or three weekly 2 ml injections. They will attend clinic visits at baseline, Week 6, Week 12, and Week 24 for assessments including WOMAC score, 7-day pain diary, functional and strength tests, and MRI scans of the knee. This single-center, partially blinded, randomized study will provide a direct comparison of the two HA injection protocols, assessing whether the single-shot approach is as safe and effective as the triple-shot regimen, while potentially offering a more convenient, patient-friendly treatment.

Timeline

Start

2026-01-15

Primary completion

2026-08-01

Completion

2026-09-01

Publications

• Background Kast S, Kemmler W, Roemer FW, Kohl M, Culvenor AG, Mobasheri A, Uder M, von Stengel S. Effectiveness of whole-body electromyostimulation on knee pain and physical function in knee osteoarthritis: a randomized controlled trial. Sci Rep. 2024 Sep 6;14(1):20804. doi: 10.1038/s41598-024-71552-7.
• Background Roemer FW, Kast S, Kemmler W, Collins JE, Engelke K, Guermazi A, Uder M, von Stengel S. Structural effects of whole body electromyostimulation on knee osteoarthritis: the EMSOAT Study. Skeletal Radiol. 2025 Nov;54(11):2579-2588. doi: 10.1007/s00256-025-04984-5. Epub 2025 Jul 22.
• Background Hofweber, L., von Stengel, S., Nürnberger, J., & Kemmler, W. (2024). Effectiveness and safety of the hyaluronic acid INNORYOS 2.2% in patients with early to advanced knee osteoarthritis. A prospective non-interventional randomized clinical trial.

Drugs

Indications