Joint instability of the elbow

What does elbow instability mean?

We speak of joint instability of the elbow when the passive (ligaments, capsule, bone guide) and/or active (muscles) stabilizers no longer reliably ensure joint contact. This can manifest itself as a subjective buckling, as uncertainty in certain positions, as a snapping/clicking or as a real dislocation.

• Posterolateral rotational instability (PLRI): most common form after ligament injury on the outside (lateral ulnar collateral ligament, LUCL); Complaints v. a. when supporting yourself with your arm stretched out and your hand turned outwards.
• Medial Instability (Valgus Instability): Overload or tear of the medial/ulnar collateral ligament (MUCL/UCL), typical in throwing sports; Pain inside the elbow.
• Generalized (atraumatic) instability: in congenital ligament laxity/hypermobility; Complaints often depend on the stress.
• Post-traumatic instability: after dislocation, fracture-dislocation or bony ligament tears.

Anatomy: Why the elbow is normally stable

The elbow consists of the upper arm bone (humerus), ulna (ulna) and radius (radius). The bony form with joint roller and socket provides guidance; In addition, a solid capsule and ligament complexes ensure stability. The muscle groups around the forearm and upper arm are also important, as they act as dynamic stabilizers.

• Medial ligament apparatus: ulnar collateral ligament complex (MUCL/UCL) for valgus stability (inside).
• Lateral ligament apparatus: lateral ulnar collateral ligament (LUCL) and radial collateral ligament complex for varus stability (external).
• Annular ligament (Lig. annulare radii): holds the radial head on the ulnar part of the ulna.
• Muscular stabilizers: v. a. Flexor-pronators (inside) and extensor-supinators (outside) as well as triceps/biceps.

Causes and risk factors

The causes range from acute injuries to gradual overload. Often several factors come into play.

• Trauma: Fall on an outstretched arm, elbow dislocation, ligament tears or bony avulsions.
• Sports overload: v. a. Throwing and hitting sports (baseball, handball, javelin, tennis), gymnastics, CrossFit/strength training.
• Occupational stress: repetitive heavy lifting, vibration, monotonous force positions.
• Previous operations/consequences of injury: e.g. B. after lateral epicondylitis surgery or incompletely healed dislocation.
• Systemic factors: generalized hypermobility, connective tissue diseases; inflammatory joint diseases.
• Accompanying pathologies: cartilage/bone injuries, loose joint bodies, osteoarthritis.

Typical symptoms

• Bending over or feeling unsteady, especially when getting out of a chair or doing push-ups.
• Clicking/snapping, feeling of blockage in the joint, occasional feeling of being trapped.
• Pain externally (PLRI, varus stress) or internally (valgus stress/UCL), sometimes radiating into the forearm/hand.
• Loss of performance in throwing/hitting sports, “losing the ball”/lack of precision.
• Swelling, irritation, possibly hematomas after dislocation.
• Tingling/numbness on the ulnar side (ring/little finger) with involvement of the ulnar nerve.

Warning signs: seek medical advice immediately

• Acute misalignment or dislocation of the elbow.
• Severe, persistent pain with significant limitation of movement.
• Numbness, signs of paralysis, cold or pale hand.
• Suspected fracture (crunch, axial deviation) after a fall.

Diagnostics: careful and step-by-step

A precise diagnosis is the basis of every therapy. We combine history, physical examination and targeted imaging. Depending on the question, dynamic tests make sense to detect instabilities under functional conditions.

• Anamnesis: Mechanism of the accident, triggering movements (support, overhead throw), noises, feeling of jumping, frequency, sport/job.
• Clinical tests: varus/valgus stress test, moving valgus stress, milking maneuver, posterolateral rotating drawer test, chair push-up and tabletop relocation test; Assessment of ligament laxity (e.g. Beighton score).
• Imaging: X-ray (including stress images if necessary) to exclude/detect fractures, bony avulsions, osteoarthritis.
• MRI/MR arthrography: assessment of ligamentous structures (UCL/LUCL), capsule, cartilage, soft tissues; often crucial for athletes.
• Ultrasound (dynamic if necessary): assessment of ligament continuity and provocation under movement.
• CT: for complex bony injuries or loose joint bodies.
• Neurodiagnosis: if ulnar nerve involvement is suspected (ENG/EMG).

Conservative therapy: standard of first choice

Most elbow instability can initially be treated non-surgically. The aim is to reduce pain, calm irritation and improve dynamic stability across muscles and coordination. The plan is created individually based on the cause, activity level and findings.

• Short-term relief/splint care: after acute injury to calm pain; early functional mobilization follows.
• Orthosis/hinge bandage: guides movements, limits varus/valgus stress in the healing phase; Avoid positions with supination/varus during PLRI.
• Physiotherapy: Strengthening the flexor-pronators (medial) and extensor-supinators (lateral), targeted coordination/proprioception exercises, addressing the scapulothoracic and kinetic chain.
• Activity modification: temporary avoidance of provocative movements (supports, push-ups, explosive throws); Technical training in sports.
• Pain and inflammation management: local cooling, if necessary anti-inflammatory medications (e.g. NSAIDs) - after individual assessment.
• Taping: situationally as feedback and slight additional stabilization.
• Accompanying factors: treatment of loose joint bodies, tendon/muscle imbalances, ergonomic adjustments at work.

Regenerative options: consider carefully

In certain constellations – such as partial UCL ligament injuries in athletes – biological processes can be discussed. The study situation is heterogeneous; a general benefit cannot be derived for all cases. Transparent information about opportunities and limits is therefore essential.

• Platelet-Rich Plasma (PRP): can have a pain-relieving and healing-supporting effect on selected, partial ligament lesions; Evidence moderate, not for complete tears as sole therapy.
• Hyaluronic acid intra-articular: primarily cartilage and synovial oriented; not standard for pure band instability.
• Cortisone injection: can reduce inflammation, but should be assessed cautiously during ligament healing phases; careful indication.

Regenerative measures do not replace structural stabilization if a mechanically relevant ligament is inadequate.

Surgical treatment: when conservative treatment is not sufficient

Surgery is considered if relevant instability persists despite consistent conservative therapy or if combined injuries (e.g. fractures, repeated dislocations) make it necessary. The aim is to restore passive stability to ensure function.

• Ligament suture/refixation (acute/subacute): for recent ruptures or bony avulsions, often with anchors.
• Ligament reconstruction (UCL/LUCL) with tendon graft (e.g. palmaris longus) if the quality of the ligament is inadequate.
• Arthroscopic accompanying procedures: removal of free joint bodies, synovectomy, assessment of cartilage damage.
• Bone procedures for accompanying fractures: e.g. B. Radial head/coronoid process treatment to restore bony guidance.
• External hinge fixators: rare, used as temporary protection in cases of complex instability.
• Nerve surgery: ulnar nerve problems, if necessary with decompression/transposition.

The surgical decision, technique and follow-up treatment depend on the type of sport, profession, tissue quality and accompanying findings. Individual prospects of success are discussed realistically and without guarantees.

Follow-up treatment and rehabilitation

Whether conservative or surgical: rehabilitation is crucial for the result. It combines step-by-step mobilization with structured strength and coordination training.

Guide values ​​vary: everyday resilience after weeks, sport-specific high stress after several months. The individual healing time depends on the type of injury, tissue quality and training consistency.

Self-help and everyday tips

• Support yourself with a neutral/pronated hand instead of supination, increase shoulder width, body weight closer to your body.
• Short-term bandage/orthosis in everyday life if this provides security (not as a permanent solution).
• Warmth before exercise, cold after exercise to control stimuli.
• Regular, symptom-adapted exercises for the forearm and shoulder muscles; Technical training in sports.
• Workplace ergonomics: Support forearms, plan breaks, avoid repeated maximum loads.

Course and prognosis

Many patients achieve good functional improvement with conservative therapy. Accurate diagnosis, adherence to protective measures and consistent rehabilitation are crucial. After severe ligament injuries or repeated dislocations, surgery can restore stability. A safe return to sport and work is based on objective criteria (freedom from pain, strength, control) and not just on time.

Prevention: How to prevent it

• Balanced strength and coordination training for the forearm, shoulder and torso.
• Clean technique in throwing/hitting sports, increasing the load gradually.
• Early treatment of painful irritations instead of “overtraining”.
• Learn protective positions in everyday life (e.g. when getting up from a chair).
• For hypermobility: specific stability training, avoid overstretching.

When to see a doctor in Hamburg?

Seek medical advice if feelings of instability persist, if pain limits activities, or if you are unsteady following a dislocation/injury. If there are warning signs such as severe misalignment, numbness or circulatory problems, please see an emergency immediately. In our practice at Dorotheenstraße 48, 22301 Hamburg, we will advise you individually.

Special cases: sports, rheumatism, osteoarthritis

• Throwing sports (UCL/medial instability): load planning, technique optimization, if necessary PRP for partial lesions; Surgical reconstruction only if relevant instability persists.
• PLRI after dislocation: lateral ligament complex affected; Consistent protection/rehab phase, if instability persists, reconstruction.
• Rheumatoid Arthritis: Inflammation can weaken capsule/ligaments; The goal of therapy is inflammation control and functional stability.
• Osteoarthritis/cartilage damage: can disrupt gliding behavior; arthroscopic rehabilitation or conservative joint therapy depending on the severity.

Costs, sick leave and everyday life

Diagnostics and guideline-based conservative treatment are usually covered by statutory and private health insurance companies. Orthoses, physiotherapy and, if necessary, injections are carried out according to medical indication. The duration of a sick leave depends on your job, injury and course of therapy. We discuss the procedure transparently and based on your individual situation.