Introduction

Knee osteoarthritis (OA) is a common condition affecting millions worldwide, often leading to pain, stiffness, and limited mobility. As the population ages, the need for effective and long-lasting treatments grows stronger. Among the options, viscosupplementation—injecting lubricating substances into the knee joint—has become popular for easing symptoms and improving function. This article compares two leading treatments, Arthrosamid and hyaluronic acid injections, to help patients and clinicians understand their differences and choose the best option for lasting relief.

What Is Viscosupplementation and How Does It Help?

Viscosupplementation involves injecting a gel-like substance into the knee joint to boost lubrication and cushioning, mimicking the natural synovial fluid. Hyaluronic acid injections have traditionally been used for this purpose. They work by reducing friction and easing pain, thanks to their anti-inflammatory and protective effects on cartilage. As one review explains, “recent clinical studies have demonstrated that the anti-inflammatory, anabolic, and chondroprotective actions of hyaluronic acid reduce pain and improve patient function” (Strauss et al., 2009). However, hyaluronic acid’s benefits tend to be temporary, often requiring a series of injections over several weeks to maintain relief. Arthrosamid is a newer alternative that may offer longer-lasting effects and fewer injections.

How Do Arthrosamid and Hyaluronic Acid Work Differently?

The key difference lies in how these treatments interact within the knee joint. Hyaluronic acid mainly supplements lubrication but gradually breaks down over a few weeks, which limits how long its benefits last. Arthrosamid, on the other hand, is a cross-linked gel that integrates more firmly into the joint, creating a stable cushioning effect that can last longer. Researchers highlight the importance of identifying “which patient factors would allow Arthrosamid to provide the most clinical benefit in a knee OA patient” (Gao et al., 2025), suggesting that personalised treatment could improve outcomes. This greater durability and consistency make Arthrosamid an intriguing option compared to traditional hyaluronic acid injections.

Practical Benefits: Treatment Schedule and Patient Experience

One major consideration for patients is convenience. Hyaluronic acid treatments typically require multiple injections, often given weekly, which can be time-consuming and uncomfortable. Arthrosamid is usually delivered in a single injection, offering a more straightforward and less disruptive treatment course. While recovery times after either procedure are generally similar, having fewer injections may improve patient comfort and adherence. In managing ongoing symptoms, consistency matters, and Arthrosamid's single-session approach could offer distinct advantages.

Which Treatment Is Right for You?

The best treatment depends on individual patient factors and the severity of osteoarthritis. Hyaluronic acid injections may suit those with milder symptoms seeking short-term relief. Conversely, Arthrosamid might be better for patients aiming for longer-lasting results or with particular knee joint conditions. Careful assessment by a healthcare professional is crucial to managing expectations and choosing the right path.

Professor Paul Lee, an expert in orthopaedics and rehabilitation at the London Cartilage Clinic, emphasises personalised care: the clinic offers a professional setting where tailored treatment plans support patient recovery and joint health. Ultimately, treatment decisions should be made alongside a qualified clinician considering each person’s unique situation.

Conclusion

In brief, Arthrosamid and hyaluronic acid injections both offer valuable options for knee osteoarthritis relief, but they differ in durability and convenience. Arthrosamid’s longer-lasting joint integration and single-injection treatment contrast with hyaluronic acid’s shorter duration and multi-session approach. Choosing wisely means weighing these factors alongside personal lifestyle and long-term goals. Because responses vary, consulting specialists such as those at the London Cartilage Clinic, guided by experienced clinicians like Professor Paul Lee, can help ensure the best outcome.

For specific medical advice, always consult a qualified healthcare professional.

References

• Strauss, E. J., Hart, J., Miller, M. D., Altman, R. D., & Rosen, J. (2009). Hyaluronic acid viscosupplementation and osteoarthritis. American Journal of Sports Medicine, 37(8), 1636-1644. https://doi.org/10.1177/0363546508326984
• Gao, H. C. K., Akhtar, M., Creedon, C., Nar, Ö. O., & Lee, P. Y. (2025). The impact of patient factors on the minimal clinically important difference of Arthrosamid polyacrylamide hydrogel injection for knee osteoarthritis: A cohort study. Osteoarthritis and Cartilage. https://doi.org/10.1016/j.joca.2025.02.648
• Gao, H. C. K., Akhtar, M., Creedon, C., Nar, Ö. O., Verma, T., & Lee, P. Y. F. (2025). Polyacrylamide hydrogel injections in knee osteoarthritis: A PROMs-based 24 month cohort study. Journal of Clinical Orthopaedics and Trauma, 103136. https://doi.org/10.1016/j.jcot.2025.103136