Microfragmented fat (microfat) in orthopedics

What is microfragmented fat (microfat)?

In microfat therapy, a small amount of fatty tissue - usually from the stomach or thigh - is obtained under local anesthesia, then mechanically "microfragmented" in a closed system and reinjected without enzymatic cell separation. In addition to fat cells, the tissue prepared in this way also contains a stromal-vascular compartment with perivascular cells, matrix components and soluble mediators. The application is usually carried out on the target tissue under ultrasound or image converter control.

Important: Microfat is not the same as cell therapy. It is minimally manipulated tissue that does not undergo enzymatic isolation of individual cell populations (as in SVF) or expansion in the laboratory. This results in differences in biology, regulation and possible indications.

• Autologous, minimally manipulated adipose tissue
• Mechanical processing in a closed system (without enzymes)
• Application intra-articular (joint) or peritendinous (tendon)
• Goal: inflammation-modulating and tissue-supporting effects

Biological basics: Why adipose tissue is orthobiologically interesting

Fat tissue is more than just an energy store. The stromal-vascular compartment contains perivascular cells and mesenchymal progenitor cells that can release cytokines, growth factors, and extracellular vesicles via paracrine signaling pathways. Anti-inflammatory, immunomodulatory and matrix-supporting effects are described in preclinical models.

• Paracrine mediators can dampen inflammation.
• Supportive matrix-related components can influence the tissue environment.
• Perivascular cells are considered a potential source of regenerative signals (no guarantee of new tissue formation).

These biological properties explain the interest in microfat for joint wear (osteoarthritis) or tendinopathies. However, clinical effects depend on individual factors and the underlying disease and are heterogeneous.

Possible areas of application in orthopedics

Microfat can be considered as a supplementary option in selected cases - after thorough diagnostics and if basic therapies have not helped sufficiently.

• Osteoarthritis: e.g. B. Knee (early to moderate), ankle, hip (early stages), shoulder
• Focal cartilage damage and post-traumatic irritation states (after individual examination)
• Chronic tendinopathies: e.g. B. Achilles tendon, patellar tendon, gluteal tendon, rotator cuff (peritendinous application)

Microfat is generally not suitable for advanced, final stages of osteoarthritis with significant axial deviation and pain at rest. Here, other concepts (e.g. joint-preserving or endoprosthetic procedures) usually make more sense.

Conservative therapy first: step-by-step plan before orthobiological procedures

Our approach is conservative: We only plan orthobiological treatments once established measures have been consistently implemented. A step-by-step plan helps to realistically classify opportunities and risks.

Evidence and limitations of microfat therapy

The number of studies on microfragmented fat in orthopedics is growing, but is still heterogeneous. Observational studies and smaller randomized studies report a reduction in pain and improved function in some patients, especially in milder stages of osteoarthritis and certain tendinopathies.

• Heterogeneous protocols (volume, target tissue, combination treatments) make comparisons difficult.
• Time horizon: Effects are often observed within 3-12 months; longer courses vary.
• Structural regeneration (e.g. full cartilage regeneration) is not guaranteed.
• Not every person benefits; Pre-existing conditions, activity level and degree of osteoarthritis influence results.

We provide transparent advice: Microfat is not a substitute for necessary operations and is not a guarantee of freedom from symptoms. The aim is a realistic, individually tailored benefit-risk assessment.

Process of treatment: From the indication to aftercare

Duration: The total appointment usually lasts 60-120 minutes. Depending on the activity, incapacity for work can be useful for one to a few days. We do not recommend driving immediately after the procedure.

Aftercare, rehabilitation and behavioral recommendations

• Protection of the removal site for 2-5 days; Compression garments can be useful.
• Joint/tendon protection gradually, then targeted activation in physiotherapy.
• Avoid full baths/swimming pools for 48-72 hours; Showering is usually possible from the following day.
• Anti-inflammatory drugs (NSAIDs) can influence early biological processes - only take them after consulting a doctor.
• Check-up appointments after 2-6 weeks and depending on progress.

A structured rehab plan is crucial. We often combine microfat with evidence-based training programs to improve everyday function and resilience.

Safety, risks and possible side effects

If carried out carefully, microfat therapy is generally considered to be low-risk, but it remains an intervention. In addition to local reactions, complications can occur.

• Hematomas, swelling, tenderness at the donor site
• Temporary joint irritation/increase in pain after injection
• Infections (rare), wound healing disorders
• Nerve/vascular irritation, very rarely injuries to neighboring structures
• Allergic reactions to local anesthetics/dressing materials

Warning signs such as increasing redness, fever, severe pain or sensory disturbances should be clarified promptly.

Who can microfat be useful for?

• Active individuals with early to moderate osteoarthritis or chronic tendinopathy
• Patients who have exhausted basic conservative therapies
• Realistic expectations: The goal is relief and functional gain, not “cure”

Contraindications or relative contraindications can be: acute infections, poorly controlled coagulation disorders, relevant skin diseases at the donor site, pregnancy/breastfeeding, active tumor disease, pronounced immune suppression, unfavorable comorbidities. Blood thinners require individual planning.

Microfat, SVF or Nanofat? Differences at a glance

Regenerative fat tissue procedures differ in preparation and potential application. The choice depends on the indication, evidence and legal framework.

• Microfat: mechanically microfragmented autologous fat; minimally manipulated; common indications in orthopedics.
• Stromal Vascular Fraction (SVF): enzymatically isolated cell fraction; subject to strict regulations in Germany; Used mostly in study/special contexts.
• Nanofat: mechanically emulsified fat with very fine particles; described in aesthetic/dermatological regeneration; orthopedic use should be assessed selectively and with caution.

We will advise you on which procedure makes sense for your problem - and only recommend procedures if the quality of the indication is convincing.

Legal, quality assurance and costs

Autologous, minimally manipulated fat tissue applications are subject to clear regulations in Germany. We only use established, certified systems and adhere to hygienic and organizational standards.

• No laboratory expansion, no enzymatic cell separation in practice
• Documented indication, sterile technique, image-guided application
• Transparent information about opportunities, limits and alternatives

Costs: Microfat is usually an individual health service (IGeL). Statutory health insurance companies usually do not cover the costs; With private insurance, a decision can be made on a case-by-case basis. We prepare a cost estimate in advance.

Your appointment in Hamburg: Individual advice instead of a standard solution

Every complaint situation is unique. In our practice at Dorotheenstrasse 48, 22301 Hamburg, we will clarify with you whether microfat or another therapy is the most sensible next step - always thinking conservatively and acting in an evidence-conscious manner.