Loose Body Treatment in Germany

Loose body (joint mouse, Gelenkkörper) is a fragment of cartilage, bone or their combination freely moving in joint cavity. Causes sudden joint locking, pain and progressive cartilage surface damage. Most commonly found in knee, elbow and ankle joints. German clinics remove loose bodies arthroscopically with simultaneous treatment of cause — cartilage regeneration by MIBRAR® method.

What is loose body

Loose body is a tissue fragment detached from articular surface and "floating" in synovial fluid. Size varies from few millimeters to 2–3 cm. Body can be:

• Cartilaginous — hyaline cartilage fragment. Not visible on X-ray, detected only on MRI or during arthroscopy.
• Osteochondral — cartilage fragment with underlying bone. Visible on X-ray and CT.
• Bony — bone fragment (in fractures, osteophytes). Well visualized on X-ray.
• Fibrous / synovial — in synovial chondromatosis (synovial membrane metaplasia).

Loose body can periodically become trapped between articular surfaces, causing acute locking (jamming) of joint, and when moving — damage healthy cartilage, accelerating osteoarthritis development.

Causes

1. Osteochondritis dissecans (Koenig's disease) — detachment of cartilage fragment with underlying bone due to subchondral zone blood supply disruption. More common in young athletes. Typical location — medial femoral condyle, talar dome.
2. Osteoarthritis — osteophyte fragments and destroyed cartilage fragments. Most common cause in elderly.
3. Trauma — intra-articular fractures, chondral fractures in dislocations and contusions.
4. Synovial chondromatosis — synovial membrane metaplasia with multiple cartilaginous bodies formation. Can be primary or secondary.
5. Meniscus tear — torn meniscus fragment can behave as loose body (in "bucket-handle" tear).
6. Rheumatoid arthritis — cartilage and bone destruction with loose fragments formation.

Symptoms

• Joint locking (jamming) — main symptom! Sudden inability to flex or extend joint. Resolves after "unlocking" (shaking, careful movements).
• Intermittent pain — acute pain at moment of body entrapment, pain-free periods between episodes.
• Swelling and effusion — reactive synovitis after locking.
• Foreign body sensation — patient can feel body "rolling" in joint. Sometimes body is palpable under skin.
• Clicking and crunching — when body moves between articular surfaces.
• Instability — sensation of joint unreliability under load.

Diagnosis

1. Clinical examination — locking history, loose bodies palpation (with superficial location), range of motion assessment, crepitation.
2. Radiography — radiopaque bodies detection (osteochondral, bony). Multiple rounded shadows — chondromatosis sign.
3. MRI — method of choice! Cartilaginous bodies visualization (invisible on X-ray), donor defect assessment (area from which fragment detached), cartilage and meniscus condition.
4. CT — precise assessment of calcified bodies quantity, size and location. 3D reconstruction for surgery planning.
5. Ultrasound — rapid effusion and superficially located bodies detection.

Conservative treatment

Conservative therapy can be justified only for asymptomatic or minimally symptomatic bodies found incidentally:

• Observation — for incidental MRI finding without locking and pain.
• NSAIDs — pain and inflammation relief during exacerbations.
• Joint aspiration — effusion evacuation in reactive synovitis.
• Physical therapy — muscle strengthening, joint stabilization.

Important: with recurrent locking conservative treatment is ineffective — loose body continues to damage cartilage. Arthroscopic removal is indicated.

MIBRAR® therapy

Loose body (Freier Gelenkkörper) is included in the list of indications for MIBRAR® technology (individual assessment). Prof. Babayan's method aims at cartilage defect regeneration — area from which fragment detached.

MIBRAR® for loose body:

• Donor defect regeneration — after loose body removal a "crater" remains on articular surface. ARK (autologous regenerative concentrate) stimulates defect filling with regenerative cartilage.
• MIBRAR® microperforations — targeted subchondral bone microtraumas open access to stem cells from bone marrow. Combined with ARK — powerful regenerative effect.
• Articular cartilage regeneration — ARK mesenchymal stem cells and growth factors differentiate into chondrocytes, restoring cartilage coating.
• Anti-inflammatory effect — reactive synovitis elimination without cortisone.

Procedure performed outpatient, under Sono Control Arm™ guidance (0.1 mm accuracy). MIBRAR® can be applied as supplement to arthroscopic body removal or independently for small cartilage defects.

Surgical treatment

Arthroscopic removal — standard treatment for symptomatic loose bodies:

1. Arthroscopic loose bodies removal — minimally invasive surgery through 2–3 punctures (5 mm). Body is grasped and extracted. Simultaneously cartilage, menisci, ligaments condition is assessed.
2. Osteochondral fragment refixation — in Koenig's disease, if fragment is sufficiently large and viable. Fixation with biodegradable pins or compression screws.
3. Microfracture / mosaic chondroplasty — for residual cartilage defect after body removal.
4. Synovectomy — affected synovial membrane removal in chondromatosis to prevent recurrence.

Treatment cost

All treatment prices in Germany.

Clinics