Patellofemoral osteoarthritis (OA) is a common but often overlooked type of knee arthritis that affects the kneecap joint. Those living with this condition frequently experience pain when climbing stairs, walking up or down hills, squatting, or cycling – all activities that put pressure on the kneecap. Unlike other types of knee OA, patellofemoral OA presents unique challenges because of the kneecap’s special anatomy and role in movement. This can make everyday tasks and hobbies difficult. Recently, Arthrosamid, a hydrogel-based treatment, has emerged as a promising way to improve cushioning in the joint and help ease symptoms. With growing interest in treatments tailored to specific types of OA, understanding options like Arthrosamid is increasingly important for those seeking relief.

What is Patellofemoral Osteoarthritis?

Patellofemoral osteoarthritis is a wear-and-tear condition that mainly affects the cartilage beneath the kneecap. This sets it apart from other knee OA types, which commonly involve the main knee joint compartments. Pain tends to be focused at the front of the knee and is often worse during movements like climbing stairs or squatting. Such discomfort can seriously impact everyday mobility and quality of life.

Unfortunately, patellofemoral OA is frequently missed or misdiagnosed, as its symptoms often overlap with other knee problems. Studies show that a significant number of patients have pain mainly because of patellofemoral involvement, emphasising the need for treatments aimed specifically at this area. Improving cushioning and joint function here is crucial—especially to make activities like cycling and walking on hills more comfortable for sufferers.

How Does Arthrosamid Help?

Arthrosamid is a soft, flexible hydrogel injected into the knee joint to mimic the natural cushioning of healthy cartilage. Its aim is to reduce friction and absorb shocks when moving, helping to ease pain and improve comfort. Research has shown that Arthrosamid can help many patients with knee osteoarthritis, offering noticeable relief during common activities such as climbing stairs or cycling.

Recent studies highlight that while Arthrosamid benefits many, the greatest improvements are usually seen in specific groups. For example, researchers point out that “the literature surrounding which patients would incur the most benefit from Arthrosamid is limited,” signalling the importance of choosing suitable candidates carefully (Gao et al., 2025a). It is suggested that Arthrosamid tends to work best for patients with particular characteristics—helping doctors and patients make more informed treatment decisions.

While the treatment does not promise a cure, many report less pain and better ease of movement, especially during activities that strain the kneecap. Experts agree that more research is necessary “to validate efficacy, refine patient selection, and evaluate long-term impact” (Gao et al., 2025). Taken together, Arthrosamid can be a valuable addition to the treatment toolkit for those who have not found relief through conventional therapies.

What Do Orthopaedic Experts Say?

In the UK, leading professional bodies such as the British Orthopaedic Society and British Knee Society have clear guidelines on knee treatments. They endorse bone cement for certain situations like trauma or cancer care but acknowledge that different approaches may suit different patients. In some clinics, including ours, uncemented implants have delivered excellent results for patients.

Their collective view supports a tailored, patient-centred approach, recognising that no one method is perfect for all. Our clinic follows these guidelines closely, ensuring that treatment choices are made with the patient’s individual needs and preferences firmly in mind.

About Professor Paul Lee and MSK Doctors

Professor Paul Lee is a highly regarded cartilage specialist and Regional Surgical Ambassador, who also serves as an advisor to the Royal College of Surgeons of Edinburgh. His wealth of experience spans both clinical orthopaedics and rehabilitation, helping shape the highest standards of care.

At MSK Doctors, patients benefit from expert assessments and personalised treatment plans delivered within a supportive environment that prioritises recovery and long-term musculoskeletal health. While the debate over bone cement has not directly affected our patients—thanks to the success of uncemented implants—our commitment to using cutting-edge, evidence-based treatments like Arthrosamid remains strong. It is important to clarify that while Arthrosamid is not a product we developed, we offer it when appropriate, ensuring high-quality care driven by the latest advances.

Final Thoughts

Patellofemoral osteoarthritis presents specific challenges that require a careful, tailored approach to treatment. Arthrosamid offers a promising option for those struggling with kneecap pain during everyday tasks such as cycling, stair climbing, and squatting. Its ability to improve joint cushioning can bring much-needed relief.

Ultimately, the best results come from combining evidence-based treatments, expert advice, and ongoing research. If you experience kneecap pain relating to OA, it’s wise to seek assessment from musculoskeletal specialists who can provide personalised recommendations and guide you towards the most suitable therapies for your individual needs.

References

• 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
• Gao, H. C. K., Akhtar, M., Creedon, C., Nar, Ö. O., & Lee, P. Y. F. (2025a). 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, Abstract Supplement. https://doi.org/10.1016/j.joca.2025.02.648