Introduction

Patellofemoral osteoarthritis (OA) is a condition affecting the kneecap, or patella, and is a common but often overlooked cause of knee pain. This particular type of arthritis causes discomfort and stiffness around the kneecap, which can make everyday movements challenging. Common symptoms include kneecap pain that worsens when climbing stairs and hills, difficulty squatting, and discomfort while cycling – all due to the cushioning within the joint wearing down. Recently, a treatment called Arthrosamid has been gaining attention as a way to improve joint cushioning specifically for kneecap osteoarthritis. In this article, we’ll explore what patellofemoral OA is, how Arthrosamid may help manage symptoms, and the expert care available from specialists like Professor Paul Lee and MSK Doctors.

Understanding Patellofemoral Osteoarthritis

Patellofemoral OA is different from other types of knee arthritis because it specifically affects the kneecap rather than the wider knee joint. It often develops through cartilage wear caused by repetitive stress, injury or simply ageing. Research shows that age plays a significant role, with “a strong positive correlation between age and OA severity” (Yang et al., 2024). It typically affects middle-aged and older adults, especially those with previous knee strain or changes in joint alignment. The pain tends to be focused around the kneecap, making going up and down stairs or hills quite difficult. Movements that require bending the knee, like squatting or cycling, also become uncomfortable as the joint struggles to cushion and stabilise. Recent studies highlight how the shape and alignment of the patellofemoral joint relate closely to OA severity: “Radiographic severity of KOA was positively associated with age, sulcus angle, and tibial tuberosity to trochlear groove distance, but negatively with lateral patellar tilt angle” (Yang et al., 2024). These issues often limit mobility, affecting independence and quality of life.

Arthrosamid: A New Approach to Restoring Joint Cushioning

Arthrosamid is a gel-like material made from polyacrylamide hydrogel, designed to improve cushioning inside the knee joint, particularly in cases of patellofemoral OA. The gel is injected directly into the joint, creating a soft, cushioning layer that helps to reduce friction between bones and supports the joint tissues. Importantly, it integrates gently with the surrounding tissue, potentially easing inflammation and improving comfort. A recent study found that “PAAG provided improvement in knee OA symptoms over 24 months in older, non-diabetic patients with lower severity grades” (Gao et al., 2025a), demonstrating promising benefits for the right candidates. While Arthrosamid may reduce pain during everyday activities such as cycling and stair climbing, it is not a standalone cure but part of a broader treatment plan. As the study authors note, “Further studies are needed to validate efficacy, refine patient selection, and evaluate long-term impact” (Gao et al., 2025a).

Expert Care with Professor Paul Lee and MSK Doctors

Professor Paul Lee is a highly respected expert in cartilage and orthopaedic surgery, holding prominent roles including Regional Surgical Ambassador and advisor to the Royal College of Surgeons of Edinburgh. He is well known for his expertise in treating complex joint issues like patellofemoral OA. At MSK Doctors, patients receive excellent care in a professional, supportive environment. The clinic combines advanced surgical treatments with personalised rehabilitation plans to optimise recovery. Treatments such as Arthrosamid injections are carefully discussed with patients to set clear expectations and ensure they’re the right fit. This patient-focused approach helps individuals make informed choices about their knee health.

Everyday Movements and the Potential Benefits of Arthrosamid

Simple daily movements that involve knee bending and cushioning – climbing stairs and hills, squatting, and cycling – often become painful and difficult for people with patellofemoral OA. Arthrosamid offers the potential to ease this discomfort by improving the joint’s cushioning and mechanical environment. Research points out that benefits tend to be greatest in “older, non-diabetic patients with milder degrees of osteoarthritis” (Gao et al., 2025a). Many patients report increased comfort during cycling and better ease when tackling stairs and slopes after treatment. It’s important to remember that Arthrosamid is just one part of a comprehensive management plan, which may also include physiotherapy and lifestyle changes. While Arthrosamid does not reverse cartilage damage, it can significantly relieve symptoms and improve day-to-day function.

Conclusion

Patellofemoral osteoarthritis is a common cause of knee pain that can seriously affect activities such as stair climbing, hill walking, squatting, and cycling. Arthrosamid represents an exciting new tool by enhancing joint cushioning, potentially improving comfort and mobility in daily life. With expert treatment from clinicians like Professor Paul Lee and MSK Doctors, patients can receive tailored, comprehensive care designed to manage symptoms effectively. For personal medical advice, always consult a qualified healthcare professional.

References

• Gao, H. C. K., Akhtar, M., Creedon, C., Creedon, C., Nar, Ö. O., Verma, T., Verma, T., & Lee, P. Y. F. (2025a). Polyacrylamide hydrogel injections in knee osteoarthritis: A PROMs-based 24 month cohort study. Journal of Clinical Orthopaedics and Trauma. https://doi.org/10.1016/j.jcot.2025.103136
• Gao, H. C. K., Akhtar, M., Creedon, C., Nar, Ö. O., & Lee, P. Y. (2025b). 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
• Yang, Z., Shen, M., Xie, D., Zhang, J., & Wei, Q. (2024). Correlation between severity of knee joint osteoarthritis and alignment of patellofemoral and patellar height on radiographs. Chinese Medical Journal, 138(8), 947–952. https://doi.org/10.1097/cm9.0000000000003392