Courtesy:
Pierre Laumonerie MD, Paris, France

Elbow Ligament Reconstruction: Current Concepts and Minimally Invasive Techniques

Introduction

Elbow stability depends on a delicate balance between:

Static stabilizers
- Ligament complexes
- Joint capsule
- Osseous congruency
Dynamic stabilizers
- Surrounding musculature

When this balance is disrupted, elbow instability develops. Successful reconstruction therefore requires an understanding of the underlying anatomy and biomechanics, followed by restoration of stability while preserving soft tissues and minimizing surgical morbidity.

1. Anatomy and Biomechanics of Elbow Stability

Lateral Ligament Complex

The lateral side consists of several important structures.

Radial Collateral Ligament (RCL)

Originates from the lateral epicondyle.
Blends distally with the annular ligament without a direct radial insertion.
Contributes to varus stability, although its contribution is limited.
Primary stability against varus stress is provided predominantly by the coronoid and anterior capsule.

Lateral Ulnar Collateral Ligament (LUCL)

Originates from the lateral epicondyle.
Inserts onto the supinator crest of the ulna.
Acts as a primary restraint against posterolateral rotatory instability (PLRI).
Failure of the LUCL can result in rotational instability.

Posterolateral Ligament

More recently described as an additional component of the lateral stabilizing complex.
Appears to contribute to:
- Posterolateral rotatory stability
- Resistance to external rotation
- Resistance to posterior translation
Its specific role in current reconstructive techniques remains uncertain.

2. Medial Ligament Complex

Anterior Bundle of the Ulnar Collateral Ligament (UCL)

Originates from the medial epicondyle.
Inserts onto the sublime tubercle.
Acts as the primary restraint to valgus stress.
Particularly important between approximately 30° and 90° of elbow flexion.
Failure results in valgus instability.

Posterior Bundle of the UCL

Extends from the medial epicondyle toward the posteromedial ulna.
Becomes increasingly tensioned with elbow flexion.
Contributes to valgus stability beyond 90°.
Also contributes to posteromedial stability, particularly with combined valgus and rotational loading.
Its importance increases when primary stabilizers are deficient, such as with coronoid deficiency.

Although the posterior bundle is a secondary stabilizer compared with the anterior bundle, it remains clinically important when reconstructing a chronically unstable elbow.

3. Patterns of Elbow Instability

Three major patterns of instability can be identified.

3.1 Medial Elbow Instability

Primarily caused by anterior UCL failure.
Results in valgus laxity.
Under pure varus loading, stability relies predominantly on:
- Ulnohumeral congruency
- Secondary capsular support near extension.

3.2 Posteromedial Rotatory Instability

Occurs when valgus stress is combined with internal rotation.
Involves:
- Posterior bundle of the MCL/UCL
- Lateral ligament complex
Coronoid deficiency can further compromise stability.
Progressive posteromedial instability may develop when these restraints are deficient.

3.3 Posterolateral Rotatory Instability

Primarily driven by LUCL failure.
May be associated with medial-sided injury.
Supination, valgus and axial loading produce:
- External rotation
- Posterior subluxation
LUCL reconstruction is essential.
UCL reconstruction may be added when medial insufficiency persists.

Chronic Multidirectional Instability

Following severe elbow dislocation or chronic instability, these patterns may coexist.

A patient may demonstrate:

Significant valgus instability
Posterolateral rotatory instability
Medial and lateral ligament insufficiency

This can be considered chronic multidirectional elbow instability.

4. Principles of Ligament Reconstruction

Three major considerations are emphasized:

Graft choice
Fixation technique
Anatomic versus non-anatomic reconstruction

5. Graft Selection

Palmaris Longus

Traditionally considered a preferred graft because of:

Availability
Long harvest site
Ease of use

Limitations

Absent in some patients.
Variable size.
May be insufficient for combined ligament reconstruction.

Peroneus Longus

Advantages:

Reliable size and strength.
Useful when other grafts are unavailable.

Limitations:

Potential common peroneal nerve injury.
Donor-site morbidity.
Reported sensory and neurological complications.
The speaker avoids it in athletes because of concerns regarding ankle stability.

Triceps Tendon

Can be used for lateral ligament reconstruction when other graft options are limited.
Provides adequate strength.

Limitations

May cause temporary extension weakness.
Requires an additional or extended incision.
Less commonly used for medial ligament reconstruction.
The speaker questions harvesting a tendon that is itself an important dynamic stabilizer of the elbow in an already unstable joint.

Gracilis/Semitendinosus

The speaker considers hamstring autografts to be robust options.

Semitendinosus

Preferred because of:

Good biomechanical strength.
Consistent diameter.
Adequate length for combined LCL and UCL reconstruction.
Minimally invasive and relatively rapid harvesting.

Limitations

Lower-limb donor-site morbidity.
Potential delay in return to sport.
Possible neuropathic scar pain or hematoma.
Potential sensory deficit related to the saphenous nerve.

6. Allograft

The speaker describes allograft as his current preferred option, particularly with increasing experience in elite athletes.

Potential Advantages

Avoids donor-site morbidity.
Avoids additional tendon-harvesting procedures.
Reduces operative time.
Provides predictable graft length and diameter.
Facilitates surgical planning.
Particularly useful when minimizing morbidity is important in elite athletes.

Limitations

Infection risk.
Higher cost.
Variable availability.

The speaker reports no infections in his series using allograft and considers it a reliable option for elbow ligament reconstruction.

7. Fixation Techniques

Inlay Technique

Graft is positioned within a bone tunnel.
Usually secured using:
- Interference screws
- Sutures
Provides direct tendon-to-bone healing.
Offers strong initial fixation and good biomechanical stability.

Limitations

More extensive bone preparation.
Greater surgical complexity.
Potential tunnel-related complications:
- Fracture
- Persistent pain

Onlay Technique

Graft is fixed directly to the bone surface.
Uses anchors and sutures.
Avoids creation of bone tunnels.

Advantages

Bone-sparing.
Less invasive.
Preserves:
- Bone stock
- Muscle
- Capsule
- Ligamentous structures
Simplifies combined ligament reconstruction.
Can substantially reduce operative time.

The speaker considers this approach a significant evolution in elbow ligament reconstruction.

8. Isometric Versus Anatomic Reconstruction

Isometric Reconstruction

The principle of isometry is to maintain relatively consistent graft tension throughout elbow motion.

Potential advantages:

Avoids excessive graft tension.
Avoids graft slackening.
Optimizes biomechanical behavior.

Earlier biomechanical studies emphasized the importance of accurate tunnel positioning and isometry.

Non-Isometric Techniques

Clinical studies have demonstrated that some non-isometric techniques can produce similar mid-term clinical outcomes, including return-to-sport rates.

Therefore:

Perfect isometry may not be essential for good clinical results.
Modern techniques increasingly prioritize:
- Tissue preservation
- Simplicity
- Reduced operative time
- Muscle preservation
- Capsuloligamentous preservation

9. Tissue Preservation: An Important Modern Principle

The speaker emphasizes a shift away from an exclusive focus on biomechanical perfection.

Key Concept

Preserving muscle and maintaining the capsuloligamentous balance may be more important than achieving perfect isometry and exact anatomic reconstruction.

Minimally invasive approaches have been associated with lower postoperative stiffness compared with more extensive open procedures.

Potential advantages include:

Reduced soft-tissue disruption.
Lower postoperative stiffness.
Faster rehabilitation.
Preservation of muscle balance.
Preservation of capsular and ligamentous structures.

10. Evolution of UCL Reconstruction

UCL reconstruction has evolved considerably since the original Jobe procedure.

Historical Techniques

Jobe procedure.
Figure-of-eight techniques.
Docking techniques.

Docking Technique

Introduced as an evolution toward improved graft tensioning and tissue preservation.
Graft is docked into humeral tunnels and secured on the ulna.

Limitations of Traditional Techniques

Bone tunnels.
Potential tunnel-related complications.
Donor-site morbidity with autografts.
Potential ulnar nerve irritation.
Longer operative time.
Greater surgical invasiveness.

The speaker considers newer tissue-sparing techniques a further step toward minimizing these limitations.

11. Minimally Invasive LUCL Reconstruction

The presented technique aims to reconstruct the LUCL while minimizing disruption of surrounding tissues.

Surgical Technique

Step 1: Identify the Landmarks

The following are marked:

Lateral humeral column
Lateral epicondyle
Radial head

A small longitudinal incision is made over the distal lateral column.

Step 2: Humeral Fixation

Retractors are positioned around the distal humerus.
A guide is positioned at the distal lateral column.
The guide is maintained perpendicular to the humeral cortex.
A knotless anchor is inserted into the posterior cortex.

Step 3: Radial/Ulnar-Side Fixation

Fluoroscopy is used to obtain a strict lateral view.
The distal fixation point is identified in relation to the supinator crest and radial head.
A second knotless anchor is inserted.

Step 4: Create the Soft-Tissue Tunnel

A clamp is passed between the muscle plane and lateral epicondylar tendons.
A tunnel is created connecting the two anchors.

Step 5: Graft Passage

A passing suture is used to pull the graft through the tunnel.
The graft is positioned within the knotless lasso constructs.

Step 6: Graft Tensioning and Fixation

Traction is applied along the axis of the anchor.
The elbow is positioned at approximately 60° of flexion.
Care is taken to avoid varus positioning.
The lasso construct is locked.
Sutures are cut and the graft ends trimmed.

Construct

The LUCL can therefore be reconstructed through two approximately 1-cm incisions.

12. Postoperative Rehabilitation After LUCL Reconstruction

The presented protocol emphasizes early mobilization.

Rehabilitation Principles

No routine immobilization.
Immediate active motion.
Early stretching.
Early strengthening of:
- Lateral epicondylar musculature
- Triceps

Restrictions

Shoulder forward elevation and abduction are limited for approximately 3 weeks.
The aim is to minimize gravity-induced valgus stress.

Return to Activity

Light sport: approximately 6 weeks.
High-demand activities: approximately 2–3 months, depending on the sport and clinical recovery.

Arthroscopic LUCL Reconstruction

For patients requiring isolated LCL reconstruction, the speaker describes an arthroscopic approach using similar fixation principles.

Proposed advantages

Smaller surgical exposure
Reduced tissue trauma
Lower postoperative morbidity
Faster restoration of motion
Earlier return to sport

The speaker emphasizes the relationship between less invasive surgery and faster rehabilitation.

14. Minimally Invasive UCL Reconstruction

UCL reconstruction presents additional challenges because the UCL contains two functionally important bundles.

Key considerations

The anterior bundle is primarily responsible for valgus stability.
The posterior bundle contributes to stability in flexion and becomes particularly important in multidirectional instability.
Both components may need to be addressed in chronic combined instability.

Surgical principles

The described minimally invasive technique involves:

Identification and protection of the ulnar nerve.
Creation of small medial and distal incisions.
Placement of humeral and ulnar suture anchors.
Fluoroscopic confirmation of anchor positioning.
Creation of a soft-tissue tunnel.
Passage of the graft.
Knotless lasso fixation on the humeral and ulnar sides.
Reconstruction of the anterior component.
Additional fixation to address the posterior bundle.
Tensioning with the elbow at approximately 60° of flexion, avoiding valgus.
Trimming of the graft after fixation.

Postoperative management

The described protocol follows the principle of fixed movement rather than immobilization:

No immobilization
Early active mobilization
Early strengthening of the flexor-pronator mass
Avoidance of passive mobilization

Return to activity

Light activity: approximately 6 weeks
High-demand activity: approximately 3 months

15. Clinical Recovery After Minimally Invasive Reconstruction

According to the speaker’s experience:

Full range of motion may be achieved within approximately 2 weeks following isolated ligament reconstruction in uncomplicated cases.
LCL reconstruction may allow restoration of motion even earlier.
Arthroscopic procedures may permit very rapid recovery of functional range of motion.
Some combat athletes have returned to international competition at approximately 3 months.

The speaker identifies donor-site morbidity from hamstring harvesting as one of the major factors that previously limited rapid return to sport.

The increasing use of allograft may potentially reduce this limitation.

16. Chronic Multidirectional Elbow Instability

The speaker describes three clinical groups in patients presenting with chronic instability after elbow dislocation.

Group 1: Single Dislocation With Persistent Instability

History of a single elbow dislocation.
Persistent instability develops.
No subsequent true dislocations.

Group 2: Recurrent Dislocation

Multiple recurrent dislocations.
Some patients may experience numerous episodes.
Chronic multidirectional instability develops after repeated injury.

Patients with:

Bony dysplasia
Connective tissue disorders

were excluded from the speaker’s described patient group.

Group 3: Chronic Fixed Dislocation

Chronic unreduced elbow dislocation.
Surprisingly, patients may have relatively modest pain.
Some residual range of motion may remain.
Patients may present months or even years after the initial injury.

17. Management of Recurrent Elbow Dislocation

Repeated elbow dislocation is considered evidence of injury to both sides of the elbow.

The speaker’s preferred approach in recurrent instability is therefore often triple ligament reconstruction, addressing:

LCL/LUCL
Anterior bundle of the MCL/UCL
Posterior bundle of the MCL/UCL

Alternative: Isolated LCL Reconstruction

In selected patients with:

Mild valgus instability
Predominantly lateral instability

isolated LCL reconstruction may be sufficient.

However, the speaker prefers combined reconstruction in high-demand athletes, particularly those exposed to substantial valgus stresses, such as combat-sport athletes.

18. Single Elbow Dislocation With Ligament Injury

After a single dislocation:

Isolated LCL reconstruction may be appropriate in selected cases.
Isolated MCL/UCL reconstruction may be appropriate when medial instability predominates.
When there is significant valgus instability associated with lateral injury, combined reconstruction may be considered.

The decision depends on the pattern and severity of instability, rather than simply the number of dislocation episodes.

19. Chronic Elbow Dislocation With Bony Destruction

In chronic dislocation, assessment of the osseous and articular structures is essential.

Particular attention should be paid to:

Coronoid height loss
Olecranon deformity
Trochlear deformity
Overall articular destruction

Severe bony deficiency may make reduction extremely difficult or impossible.

Treatment options

In severe cases:

Total elbow arthroplasty may be required.

In other cases, a complex reconstructive procedure may be considered.

20. The “French Elbow Reconstruction”

The speaker describes a series of 12 chronic elbow dislocation cases treated with what he refers to as the French elbow reconstruction, published in International Orthopaedics in 2025.

The procedure consists of:

Extensive release

Complete intra-articular and extra-articular release.

Ligament reconstruction

Reconstruction of:

LCL
Anterior bundle of MCL
Posterior bundle of MCL

Anterior capsular repair

Systematic anterior capsule repair.
The capsule is repaired to the coronoid using an anchor.
The aim is to improve control of varus instability, particularly in extension.

Evolution of fixation

The speaker describes a transition:

Earlier technique

Jobe-style bone tunnels.

Current technique

Extra-anatomic, onlay fixation.
Bone-sparing fixation principles.

Graft selection

The technique has also evolved from:

Hamstring autograft

toward:

Allograft

The rationale is to reduce operative time and avoid additional donor-site morbidity during an extensive reconstruction.

21. Key Take-Home Messages

1. Elbow stability is a balance

Elbow stability depends on the interaction between:

Osseous congruency
Capsule
Ligaments
Dynamic muscular stabilizers

2. Understand the pattern of instability before reconstruction

Different patterns require different strategies:

Medial instability
Posteromedial rotatory instability
Posterolateral rotatory instability
Chronic multidirectional instability

3. LUCL reconstruction is central to PLRI

When posterolateral rotatory instability is present, restoring the LUCL is fundamental.

4. The posterior bundle of the UCL should not be overlooked

Although secondary to the anterior bundle, it becomes particularly relevant in:

Flexion
Posteromedial instability
Coronoid deficiency
Chronic multidirectional instability

5. Graft choice should consider the patient

While hamstring autografts provide excellent mechanical properties, donor-site morbidity can be important—particularly in athletes.

Allografts may offer:

Predictable dimensions
Reduced operative time
No donor-site morbidity

but have disadvantages including cost, availability and infection risk.

6. Bone-sparing fixation is increasingly attractive

Onlay fixation with suture anchors may:

Preserve bone
Reduce surgical trauma
Simplify combined reconstruction
Reduce operative time

7. Perfect isometry may not be essential

Modern reconstruction is moving away from an exclusive focus on:

Exact anatomy
Isometry
Bone tunnels

toward:

Tissue preservation
Functional stability
Early mobilization

8. Minimally invasive and arthroscopic techniques may accelerate rehabilitation

The speaker’s experience suggests that less invasive approaches can facilitate:

Earlier restoration of motion
Lower postoperative morbidity
Earlier return to sport

9. Recurrent dislocation usually implies multidirectional injury

Repeated elbow dislocation should raise suspicion for combined injury of the lateral and medial ligament complexes.

10. The modern goal is functional restoration

“Less obsession with perfect anatomy and isometry, and more emphasis on tissue sparing.”

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