Regenerative medicine is a field that, instead of replacing damaged tissues with prosthetics, aims to restore them. It sounds like science fiction, but over the past 15 years, science has advanced enough to make this a reality. However, not everything called "regenerative" is equally effective.
What regenerative orthopaedics is
The term covers injections of products made from the patient’s own tissue — blood, bone marrow or fat — for osteoarthritis, tendinopathy and injuries. The aim is to reduce pain and inflammation and support healing. They cannot replace a joint or grow new cartilage.
Main methods
- PRP — platelet-rich plasma; the best-studied procedure.
- CGF — a blood concentrate with a fibrin matrix, similar to PRP; few comparative studies.
- BMAC — bone marrow concentrate from the iliac crest.
- MFAT — microfragmented fat tissue after mini-liposuction.
- SVF — fat cells isolated with enzymes; regulated as a medicinal product in the EU.
An honest comparison
| PRP / CGF | BMAC / MFAT | |
|---|---|---|
| Harvest | Blood from a vein | Bone marrow aspiration or mini-liposuction |
| Evidence | Moderate for knee osteoarthritis and tennis elbow | Limited, small studies |
| Cartilage restoration | Not proven | Not proven |
| Usual duration of effect | Several months | Individual, little data |
| Cost | Lower | Higher |
What these methods can and cannot do
In some patients with early and moderate osteoarthritis, tendinopathies and partial injuries they reduce pain for several months. In severe osteoarthritis, complete tears with loss of function and neurological deficits they do not replace surgery.
Questions to ask a clinic
- Which product exactly is offered, and why this one?
- Is it injected under ultrasound or X-ray guidance?
- What results can be expected, when are they assessed and what happens if there is no effect?
- What are the alternatives, including simpler and cheaper ones?
- What is included in the price?
More on methods in the treatments section.
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Who it is not suitable for and possible risks
Contraindications
- Active infection — at the injection site or systemic, with fever.
- Active cancer or ongoing chemotherapy.
- Blood clotting disorders or a low platelet count. Anticoagulants are discussed with the physician.
- Pregnancy and breastfeeding — the procedure is usually postponed.
- A corticosteroid injection into the same area in recent weeks.
- Severe stage IV osteoarthritis with axial deformity and joint destruction — joint replacement is usually discussed instead.
Possible risks
- Pain and swelling at the injection site for 1–3 days.
- Bruising where blood or fat tissue is taken.
- Rarely, infection. The procedure is therefore performed under sterile conditions with ultrasound or X-ray guidance.
- The effect may be absent or smaller than expected.
If any of these apply to you, mention it in your request. The coordinator will check with the clinic physician whether treatment is possible. Contact a coordinator.
Scientific evidence
Studies of regenerative methods show mixed results. Clinic physicians rely on research including the following:
- Mao AS et al. Regenerative medicine: Current therapies and future directions. Proc Natl Acad Sci U S A, 2015.
- Pas HI et al. Stem cell injections in knee osteoarthritis: a systematic review of the literature. Br J Sports Med, 2017.
Next steps: Treatment methods · Treatment cost · How treatment in Germany is organised
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