Am I a Good Candidate for Hydrogel Injections?

If knee osteoarthritis is limiting your mobility, hydrogel injections may be one option to discuss before surgery. This guide explains who may be suitable, which health factors require extra care, and why a specialist assessment is essential before deciding whether treatment is right for you.

When Hydrogel Injections May Be Considered

Hydrogel treatment for osteoarthritis commonly refers to Arthrosamid, a non-absorbable polyacrylamide hydrogel injected into the knee joint. It is intended for adults with symptomatic knee osteoarthritis who have already tried conservative treatments without receiving enough relief.

You may be a potential candidate when knee pain and stiffness continue to affect walking, work, exercise or everyday activities. Your clinician may first expect you to have explored options such as appropriate exercise, physiotherapy, weight management, pain medication or other non-surgical treatments.

Some people consider hydrogel injections because they want to delay knee replacement or are not currently suitable for an operation. Others may have received only temporary or limited relief from previous treatments. However, wanting to avoid surgery does not automatically make someone suitable for an injection.

Hydrogel treatment aims to reduce symptoms rather than cure osteoarthritis or rebuild damaged cartilage. The manufacturer explains that successful treatment may reduce knee pain, but symptoms may not improve in every patient and can sometimes worsen.

What Will the Specialist Assess?

Before recommending hydrogel injections, a clinician should confirm that osteoarthritis is the main source of your knee pain. Other conditions can produce similar symptoms, so a proper diagnosis is important before selecting any joint injection.

Your assessment may include a discussion of your symptoms, medical history, mobility and previous treatments. The clinician may also review existing scans or arrange imaging to understand the condition of your knee and identify other problems that could influence the outcome.

Your treatment goals matter as well. One patient may want to walk further without pain, while another may want to remain active at work or return to a favourite form of exercise. Clear and realistic goals help your specialist explain what the injection may achieve and what it cannot promise.

Current research reports improvements in pain, stiffness and physical function for some patients following polyacrylamide hydrogel treatment. However, researchers continue to study long-term outcomes and how clinicians can identify the patients most likely to respond. One 2025 study found better results among certain patient groups, but it had no control group and called for further research to refine patient selection.

When Treatment May Need to Be Delayed or Avoided

Not everyone is an appropriate candidate. According to the current instructions for use, Arthrosamid should not be injected when there is an active skin condition or infection near the injection site, when the knee joint is infected or severely inflamed, or when uncontrolled anticoagulation or haemophilia creates an unacceptable bleeding risk.

Treatment may also be unsuitable when another non-absorbable implant is already present in the knee. A clinician will need to know about previous knee replacement surgery, foreign material within the joint, recent arthroscopy and earlier injections. Arthrosamid should not be administered within six months of knee arthroscopy, and an absorbable injection such as hyaluronic acid should have had enough time to be absorbed first.

Extra caution may be required if you have an infection elsewhere in your body, an autoimmune disorder, a compromised immune system or uncontrolled diabetes. Immunosuppressive treatment, upcoming major dental work and other invasive medical procedures also need to be discussed before proceeding.

Safety and effectiveness have not been established for patients under 18, pregnant or breastfeeding women, or people with a body mass index of 35 or above. These factors do not replace individual medical advice, but they are important parts of the suitability assessment.

Making an Informed Decision

Before receiving hydrogel injections, ask what evidence supports the treatment for your particular knee and what alternatives remain available. You should also understand the expected recovery, possible side effects and what will happen if your symptoms do not improve.

It is especially important to know that Arthrosamid is a permanent, non-degradable implant. Its current instructions for use describe an expected performance lifetime of five years, so the decision deserves careful consideration rather than treating it like a routine temporary injection.

A good candidate is therefore not simply someone who has knee pain. The strongest candidates usually have a confirmed osteoarthritis diagnosis, persistent symptoms despite conservative care, realistic expectations and no health factors that make the procedure inappropriate.

The only reliable way to determine your suitability is through an individual clinical assessment. If knee osteoarthritis continues to restrict your daily life, explore more information about hydrogel treatment or contact the Regenesis team to discuss your symptoms, previous care and possible next steps.