Knee osteoarthritis at 50+: after physio and injections
This is a composite decision situation, not a real patient, testimonial or individual treatment recommendation.
You are in your fifties or sixties, the knee has been grinding for a few years, and you have done the responsible things: physiotherapy blocks, weight work, maybe hyaluronic acid or a corticosteroid shot that helped for a while. A surgeon has mentioned that a replacement is likely one day — just not yet. Somewhere between those two facts, an ad for “stem cell knee repair” found you.
This is the single most common situation in which people research cell therapy, and it is also the best-studied one.
What the data says for this situation
Knee osteoarthritis is the most-trialled orthopaedic use of mesenchymal stromal cells: our registry snapshot counts 124 MSC studies, with 9 recruiting right now. Published results show something consistent but unglamorous: pain and function scores often improve for months, similar in size to what good PRP or exercise programmes achieve — while claims of cartilage regrowth remain unproven on imaging in controlled work. No cell product is approved for knees by FDA or EMA; everything on offer is investigational or practised under looser rules abroad.
The cheaper comparator matters: PRP has a far larger published human record for this exact joint (about 1,800 papers, 1,000+ human). A clinic quoting ten times PRP’s price for cells should be able to show registry-grade outcome data for that gap.
Questions worth asking any provider
- Which exact cell product and dose would I receive, and is it culture-expanded?
- What did YOUR last 50 knee patients look like at 12 months — measured how?
- Why would this beat PRP or a structured exercise programme for my grade of arthritis?
- If it fails, does anything about my future replacement surgery get harder?
Red flags specific to this situation
- Guaranteed cartilage regrowth or “avoid surgery forever” language
- One price for every knee regardless of arthritis grade
- No orthopaedic imaging review before quoting — diagnosis by phone
Cost context
Published market ranges for orthopaedic cell injections run roughly €5,000–€15,000 per knee abroad; PRP courses typically cost a tenth of that. See our cost index for country-level figures with dates.
FAQ
Can stem cells regrow knee cartilage?
Controlled human evidence has not demonstrated cartilage regrowth; measured benefits are in pain and function scores, typically over months.
Is it better than a knee replacement?
It does not treat what a replacement treats. For end-stage arthritis, delaying a needed replacement has its own costs.
→ Build questions for a specific provider · → Cost calculator
Interactive/editorial page by the StemCellAtlas research team. Where registry or literature counts appear, they use the dated 2026-08-29 snapshot. Browser-only tools do not send or store answers. Page generated 2026-08-29. See our editorial standards.