Move freely, without surgery.
Arthrosamid® is a single injection that delivers long-lasting, clinically proven relief from knee osteoarthritis pain, offered by Paddy Subramanian at leading private hospitals across London and Hertfordshire.
A Non-Surgical Option for Knee Osteoarthritis
What is Arthrosamid®?
Arthrosamid® is an injectable hydrogel implant that delivers long-lasting, proven pain relief for knee osteoarthritis, improving quality of life without surgery.
It is administered as a simple, one-step procedure under local anaesthetic, so you are in and out of the clinic the same day. Once in place, the hydrogel integrates within the lining of the knee joint, cushioning the joint and reducing pain, with a single treatment.
Unlike steroid or hyaluronic acid injections, which typically wear off within months, Arthrosamid® is a non-degradable implant: five-year data shows it remains safe and effective long after a single injection.
- Proven to maintain a significant, long-lasting reduction in knee osteoarthritis pain five years after a single injection
- No serious side effects reported in clinical trials: the most common effects were mild joint pain or swelling lasting days to weeks
- The hydrogel's safety profile has been established over more than 20 years of use in the body
- Thousands of patients treated across more than 220 clinics in Europe
A Simple Day-Case Procedure
What to expect on the day
Your knee is cleaned, and a local anaesthetic numbs the area. You are also given antibiotics beforehand to protect against any risk of infection.
Arthrosamid® is given as a single injection into the knee's synovial cavity, sometimes with the help of ultrasound guidance.
The needle is removed and a plaster placed over the injection site. You are in and out of the clinic the same day.
Most patients feel an effect within a few weeks, with the maximum benefit typically at four to twelve weeks. Structured rehabilitation aids recovery.
Two-Minute Explainer
Arthrosamid® in two minutes
Your Arthrosamid® Clinician
Paddy Subramanian
Arthrosamid® is offered by Paddy Subramanian, Consultant Hip & Knee Surgeon, a knee specialist performing over 500 hip and knee procedures a year. Because he offers the full range of knee treatments, from physiotherapy-led care and injections through to partial and total knee replacement, his advice on whether Arthrosamid® is right for your knee is honest and unbiased.
Learn More
Patient brochures & leaflets
FAQs
Common questions about Arthrosamid®
Who is Arthrosamid® suitable for?
Arthrosamid® is designed for adults with knee osteoarthritis, particularly those whose pain is no longer controlled by physiotherapy, painkillers or conventional injections, and who want to delay or avoid knee replacement surgery. Paddy Subramanian will assess your knee, your x-rays and your goals, and give you an honest recommendation, including whether a different treatment would serve you better.
How does it work?
Once injected, the hydrogel integrates within the tissue lining of the knee joint over approximately 6–12 weeks, softening the lining and increasing its elasticity, improving knee function and reducing pain with one single treatment.
When will I feel the benefit?
Some patients feel relief within days, and most start to feel an effect within a few weeks. The maximum benefit typically comes at four to twelve weeks after the injection.
Can I have both knees treated?
Yes, both knees can be treated with Arthrosamid®. Your consultant will advise the appropriate interval between treatments.
Is it a cure for osteoarthritis?
No. There is no cure for osteoarthritis, and it is important to be honest about that. Successful treatment with Arthrosamid® may reduce or relieve your knee pain, but osteoarthritis may not improve and can progress over time. If surgery later becomes the right option, having had Arthrosamid® does not prevent it.
Wondering if Arthrosamid® is right for your knee?
Book a consultation and Paddy Subramanian will assess your knee, explain every option, surgical and non-surgical, and help you make the right decision for you. Appointments are usually available within 24 hours.
There is no cure for osteoarthritis. Successful treatment with Arthrosamid® may reduce or relieve knee pain, but osteoarthritis may not improve and in some cases may worsen. Please speak to your clinician about indications, expected results, contraindications, warnings, precautions and potential complications. Arthrosamid® is a registered trademark of Contura Orthopaedics Ltd.
Take the first step today
Living with hip or knee pain does not have to be permanent. Book a consultation and find out exactly what is wrong, what your options are, and what life could look like without the pain.