Regenerative Medicine & Knee Pain. How & Why?

Regenerative Medicine & Knee Pain How & Why?

Living with knee pain can make everyday life hard. Climbing the stairs, walking the dog, a round of golf or simply getting out of a chair can start to feel like a challenge.

If your knee pain keeps coming back, you may be wondering what else could help. This guide explains regenerative medicine for knee pain in plain terms: what it is, how it works, who it may suit and what to expect at Medica Stem Cells.

In short

Regenerative medicine for knee pain uses natural healing material from your own body, such as platelet-rich plasma (PRP) or bone marrow cells. A doctor injects it into your knee using image guidance. The aim is to calm inflammation, ease pain and help your knee move better. Results vary from person to person.

Why Knee Pain Can Be So Hard to Shake

You are far from alone. A large Irish study called TILDA found that 12.9% of adults over 50 in Ireland have osteoarthritis, about 1 in 8 people. Among women in that age group, the figure rises to 17.3% (TILDA study).

Osteoarthritis is more than simple wear and tear. It affects the whole knee, including the cartilage, the bone underneath and the soft lining of the joint. When that lining becomes inflamed, your knee can feel stiff, swollen and sore.

Knee pain does not only come with age. Many active people develop arthritis years after a sports injury, such as a torn meniscus or a damaged ligament. Our page on knee arthritis and osteoarthritis explains the condition in more detail.

How Regenerative Medicine for Knee Pain Works

Your body already knows how to heal. When you cut your finger, it sends repair signals to the injured spot. Regenerative medicine gathers some of those natural healing helpers and places them exactly where your knee needs them.

What is platelet-rich plasma (PRP)?

Platelet-rich plasma is a concentrate made from a small sample of your own blood. A machine spins the blood to collect the platelets, the tiny cells that carry natural repair signals. The doctor then injects this concentrate into your knee.

Think of platelets as messengers. They release growth factors that help calm the knee and support tissue repair. You can read more on our platelet-rich plasma therapy page.

What are stem cells?

Stem cells are cells found in your bone marrow and fat that help your body repair tissue. In the knee, they release signals that help settle inflammation and support the joint. The doctor collects a small amount of bone marrow from the back of your hip under local anaesthetic, prepares it, and injects it into your knee on the same day.

Because both treatments use material from your own body, no donor cells are involved. Our guide to non-surgical regenerative therapy explains each option we offer.

What Does the Research Say?

Research into regenerative medicine for knee pain has grown steadily over the past decade. Here are some of the key findings.

  • Lasting results for some patients. Researchers at Clínica Universidad de Navarra in Spain followed people who had a single stem cell injection for knee osteoarthritis. Much of the improvement seen at one year was still there at two and four years (Lamo-Espinosa et al., 2021).
  • Less knee pain. A 2025 review of ten studies found that stem cell injections reduced pain in people with knee osteoarthritis (updated review, 2025).
  • Exercise makes a difference. Another 2025 review found that people who followed an exercise programme after their injection had better pain relief and movement (Frontiers in Rehabilitation Sciences, 2025).
  • Safety. NICE in the UK found no major safety concerns with PRP for knee osteoarthritis. It also asks clinics to track results carefully while more high-quality research builds up (NICE guidance).

Research is still growing, and everyone responds differently. That is why a careful assessment before treatment matters so much.

Could Regenerative Treatment Be Right for You?

Doctors describe knee arthritis in stages, using a simple scale called the Kellgren-Lawrence grade.

What is the Kellgren-Lawrence grade?

The Kellgren-Lawrence grade is a score from 0 to 4 that shows how much arthritis appears on a knee X-ray. Grade 1 means very early changes. Grades 2 and 3 mean mild to moderate arthritis, and grade 4 means severe damage where the bones rub together.

Regenerative treatment tends to suit people who:

  • have early to moderate knee arthritis (grades 1 to 3)
  • still have knee pain despite exercise, physiotherapy or weight management
  • are developing arthritis after an old sports injury
  • are happy to follow a rehab programme after treatment

It may not be the right choice if you have severe, bone-on-bone arthritis, a blood disorder, a low platelet count or an active infection. Your doctor will talk this through with you at your consultation.

Questions you might like to ask

  • What stage is my knee arthritis?
  • Which treatment would you suggest for me, and why?
  • What results can I realistically expect?
  • What will my recovery look like?

What to Expect at Medica Stem Cells

Treatment takes place in a single day as an outpatient, so you go home the same day. Here is what your journey usually looks like.

  • Your consultation. A doctor listens to your story, examines your knee and looks at your scans. [CLINIC TO CONFIRM: imaging used.]
  • Preparing your treatment. For PRP, we take a small blood sample. For stem cell treatment, the doctor collects a small amount of bone marrow under local anaesthetic. [CLINIC TO CONFIRM: preparation details.]
  • Your injection. The doctor uses image guidance to place the injection precisely inside your knee. [CLINIC TO CONFIRM: ultrasound or fluoroscopy.]
  • Getting moving again. Our physiotherapy team gives you a tailored exercise plan to support your recovery.
  • Checking your progress. We follow up to see how your pain and movement are improving. [CLINIC TO CONFIRM: follow-up schedule.]

Our clinic experience: [INSERT a specific, documented Medica Stem Cells outcome, such as the average improvement in knee scores at 6 months, with patient numbers. Do not publish without real data.]

Paying for treatment

In Ireland and the UK, people usually access these treatments privately rather than through the HSE or NHS. We welcome a range of health insurers, so check with your provider about your cover before booking.

Frequently Asked Questions:

The main goal of treatment is to ease pain and help your knee move more comfortably. It will not give you a brand new knee, but many people notice a difference in how their knee feels day to day.

Most patients return to normal daily activity within a few days. Sport and heavy exercise usually build back gradually over several weeks, guided by a physiotherapy plan. [CLINIC TO CONFIRM typical timeframes.]

These injections do not usually rule out future surgery. Discuss your own situation with your clinician, especially if you are already on a surgical waiting list.

The treatment uses material from your own body, and NICE found no major safety concerns with PRP for knee osteoarthritis. Some people feel mild soreness or swelling in the knee for a few days afterwards. Your doctor will explain any risks that apply to you.

Next Step

If knee pain is limiting your day and standard treatment has not helped, a clinical assessment can clarify whether regenerative treatment suits your knee. Find out if you are a candidate for regenerative therapy by booking a consultation with our clinical team.

This article is for informational purposes only and does not constitute medical advice. Individual results may vary. Please consult a qualified clinician before making any treatment decisions.

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