Arthrofibrosis is unpleasant if not treated.
What Is Arthrofibrosis?
After surgery, trauma, or prolonged immobility, excessive scar tissue accumulates inside or around a joint—usually the knee—causing stiffness, limited range of motion, and persistent pain. Known as "joint contracture" or "frozen knee/shoulder," it can be controlled but has no cure.
Key Arthrofibrosis Facts
Fibrous scar tissue in a joint restricts movement. Knee (particularly after ACL surgery or replacement), shoulder (frozen shoulder), elbow, hip, and ankle.
Quick Compare
- Knee arthrofibrosis and adhesive capsulitis (frozen shoulder).
- Causes include surgery (ACL, TKA), trauma, inflammation, diabetes, and idiopathic causes.
- Pain, stiffness, a limp, and edema. Hurt, stiffness, and restricted ROM.
- Treatments: PT, MUA, scar removal. PT, anti-inflammatories, and injections.
- Early post-surgery mobilisation. Prevent extended immobility.
Vital Considerations
- Untreated arthrofibrosis might be more debilitating than the injury or surgery.
- Although there is no cure, early discovery and treatment enhance outcomes.
- Managing inflammation and rehabilitation requires close collaboration with orthopedic specialists.
The cause of arthrofibrosis?
Main Arthrofibrosis Causes
- Surgical procedures:
- Often following ACL repair and TKA.
- Extensive scar tissue after healing limits joint mobility.
Injury or trauma:
- Joint injuries cause inflammation and scarring.
Long-term immobilisation:
- Long-term joint immobility following surgery or injury increases risk.
Immune response, inflammation:
- Abnormal collagen deposition is caused by overactive fibroblasts and cytokines like TGF-β1.
Complications like infection:
- Infections after surgery can slow recovery and exacerbate scarring.
Basic conditions:
- Obesity, diabetes, autoimmune diseases, and chronic inflammation raise risk.
Biological Mechanism
- Fibroblast migration and ECM protein production are normal healing processes.
- Arthrofibrosis dysregulates this mechanism, causing:
- Myofibroblast activation persists
- High collagen deposition
- Thickening/contracting capsules
- Pain and limited range of motion can last long after the accident or surgery.
Possible Risks
- ACL, knee, and meniscus repairs are high-risk operations.
- Injury to the shoulder, elbow, or knee.
- Up to 24% of diabetics develop shoulder contracture.
- Excessive exercise might cause inflammation and fibrosis.
Arthrofibrosis signs
Arthrofibrosis causes joint stiffness, intense discomfort, and limited range of motion. After surgery or injury, especially in the knee, these symptoms might be more debilitating.
- Key symptoms include acute, continuous pain that worsens with activity.
- Stiff joints:
- Restricted joint movement.
- ROM reduction:
- Trouble bending or straightening a joint.
Additional Symptoms
- Leg straightening difficulty might lead to a limp.
- Inability to fully bend the joint restricts daily activities like sitting or climbing stairs.
- Swelling or warmth in the joint signals persistent inflammation.
- Move the joint and hear crepitus.
- Disuse-weakened surrounding muscles.
Effect on Daily Life
- Driving or rising up from a chair can be difficult.
- Symptoms often continue after physical therapy, making rehabilitation challenging.
- Scar tissue may pull the kneecap into an unnatural position (patella infera), worsening discomfort and movement.
Know if your knee has scar tissue?
- Signs of Knee Scar Tissue
- Pain worsens after surgery or damage.
- The knee is stiff and challenging to move.
- Limited knee flexion and extension.
- Walking with a bent knee: The quadriceps are unable to straighten the leg.
- Joint swelling or warmth: Chronic inflammation.
- Knee grinding or clicking is crepitus.
- The joint may be red, throbbing, or sore.
Why It Happens
- Failure to heal: Collagen and fibrous tissue accumulate following ACL reconstruction or total knee replacement.
- Repeated trauma causes aberrant scarring.
- Immobilising the knee for too long after surgery increases danger.
Doctors Verify It
- Physical exam: Knee flexibility, discomfort, and straightening/bending.
- MRI/X-rays can show thick fibrous tissue inhibiting movement.
- Clinical criteria: Constant stiffness and discomfort after rehabilitation.
When to Seek Medical Help
- Surgery or injury-related pain that intensifies.
- Despite physical therapy, knee mobility remains abnormal.
- Long-lasting swelling, warmth, or redness.
Is arthrofibrosis permanent?
- If not diagnosed and treated early, arthrofibrosis might become permanent.
Why It May Last
- Extra scar tissue: Joints can become immobile when dense fibrous tissue accumulates.
- Joint capsule contracture: The capsule may shrink and tighten, locking the joint.
- Delaying treatment: Ignoring stiffness and pain thickens scar tissue, making removal tougher.
When Reversible
- Physical therapy and regulated exercise can restore mobility after surgery or injury if discovered early.
- Anesthetized manipulation or arthroscopic scar tissue removal improves range of motion.
- Regular rehabilitation: Gentle, guided activities keep the joint mobile and avoid recurrence.
May Be Permanent
- Severe cases: Hardened scar tissue from long-term arthrofibrosis.
- Multiple surgeries increase scar tissue risk.
- Diseases like diabetes, autoimmune disorders, and persistent inflammation might hinder recovery.
Diagnosis
- The clinical evaluation checks joint flexibility and discomfort.
- Imaging: MRI or X-rays to confirm scar tissue.
- Despite conservative rehabilitation, stiffness and pain persist.
Treatment Choices
- Conservative management:
- Rest, ice, and anti-inflammatories.
- Physical therapy and gentle range-of-motion exercises.
- Procedures (if conservative care fails):
- A joint is aggressively flexed to break scar tissue during manipulation under anaesthesia.
- Arthroscopic surgery: Scar removal.
- Physical rehabilitation after treatment is essential to prevent recurrence.
Arthrofibrosis therapy
Main Treatment Methods
The video is about the arthrofibrosis treatment.
1. First-line conservative management
- PT: Gentle, regulated activities that enhance the range of motion without irritation.
- CPM: A machine that slowly moves the joint to prevent adhesions.
Medications:
- Reduce swelling and discomfort with NSAIDs.
- Currently being studied are metformin, losartan, pregabalin, anti-TNF-α antibodies, and JAK inhibitors for inflammation control.
- Lifestyle support: Sleep, stress reduction, massage, and diet to minimize systemic inflammation.
2. Minimal Invasive Methods
- MUA breaks adhesions by gently moving the joint while the patient is asleep.
- Minimally invasive arthroscopic adhesion lysis removes scar tissue.
- Be cautious and targeted—aggressive surgery or therapy can aggravate fibrosis.
3. Experimental/Advanced Therapies
- Researchers are investigating medications that disrupt TGF-β signalling or alter epigenetic pathways to prevent scar tissue formation.
- Relaxin-2 microparticles: Scar tissue relaxation may reverse fibrosis in preclinical investigations.
- Myofibroblast-targeted cell therapies: Reversing scar tissue production.
Prevention
- Within hours or days of surgery, encourage exercise to minimize scar tissue.
- Avoid vigorous therapy: Overexercising worsens inflammation and fibrosis.
Risks and Factors
- Overtreatment: Excessive PT or surgery might increase inflammation and scarring.
- Damage to the knee's infrapatellar fat pad might cause fibrosis.
- Scar tissue can return after surgery if rehabilitation isn't done properly.
Comparison of Treatments
- PT/CPM: Restore motion, prevent adhesions. Non-invasive, safe, slow improvement requires consistency.
- Drugs: Reduce inflammation/fibrosis. User-friendly, systemic. Limited proven efficacy
- MUA breaks adhesions quickly. Improved ROM immediately. Risk of tissue damage
- Arthroscopic surgery: Remove scar tissue. Intervene directly. Recurrence, invasive threat
- Experimental treatments: Target cell-level fibrosis. Possible long-term remedy Still being tested
Conclusion
Usually, after surgery or trauma, excessive scar tissue production causes arthrofibrosis, a dangerous joint ailment. It causes discomfort, stiffness, and limited mobility and can become permanent and devastating if untreated.
Arthrofibrosis is a failed healing process. Early diagnosis, gentle therapy, and professional care can help many people regain mobility and avoid lifelong disability.






