Intercondylar Fractures of the Distal Humerus

Bicolumnar Concept:

• Two columns diverge distally from humeral shaft
• Forms triangular structure when viewed end-on
• Supports articular surface (trochlea and capitellum)

Medial Column:

• Supports the trochlea
• Medial epicondyle is non-articular
• Thicker bone posteriorly and medially
• Best plate position: Posteromedial

Lateral Column:

• Supports the capitellum
• Lateral epicondyle is non-articular
• Thicker bone posteriorly and laterally
• Best plate position: Posterolateral

Thin Zones:

• Olecranon fossa (posterior)
• Coronoid fossa (anterior)
• Not suitable for screw placement

The bicolumnar anatomy dictates the dual plating strategy.

Trochlea:

• Spool-shaped articular surface
• Articulates with olecranon
• 300-330° of articular arc
• Lateral ridge more prominent

Capitellum:

• Spherical articular surface
• Articulates with radial head
• Approximately 180° of articular arc
• Anterior and inferior only

Trochlear Ridge:

• Separates trochlea from capitellum
• Key landmark for reduction

Articular Angles:

• Carrying angle: 11-14° valgus
• Trochlear tilt: 3-8° internal rotation

Anatomic restoration of the articular surface is critical for function.

Ulnar Nerve:

• Posterior to medial epicondyle
• Runs in cubital tunnel
• At risk during surgical approach
• Must be identified in all cases

Collateral Ligaments:

• MCL: Medial epicondyle to sublime tubercle
• LCL complex: Lateral epicondyle to ulna
• Usually remain attached to epicondyles

Muscular Attachments:

• Common flexor origin: Medial epicondyle
• Common extensor origin: Lateral epicondyle
• Triceps insertion: Olecranon

The ulnar nerve must be identified and protected in all surgical approaches.

Bone: 13 (Distal Humerus)

Type A - Extra-articular:

• A1: Avulsion
• A2: Simple metaphyseal
• A3: Multifragmentary metaphyseal

Type B - Partial Articular:

• B1: Sagittal lateral condyle
• B2: Sagittal medial condyle
• B3: Coronal plane (capitellum/trochlea)

Type C - Complete Articular (Intercondylar):

• C1: Simple articular, simple metaphyseal
• C2: Simple articular, comminuted metaphyseal
• C3: Comminuted articular

Type C fractures are the focus of intercondylar management.

High T Pattern:

• Fracture line above fossae
• More proximal column involvement
• Easier fixation

Low T Pattern:

• Fracture line at or below fossae
• Less bone for distal fixation
• More challenging

Y Pattern:

• Oblique fracture lines
• Asymmetric column fractures
• Variable difficulty

H Pattern:

• Trochlear comminution
• Most difficult pattern
• Consider TEA in elderly

Lambda Pattern:

• One column fracture exits medially or laterally
• Asymmetric presentation

Jupiter classification describes fracture geometry and guides surgical planning.

Low Complexity:

• C1 fractures with large fragments
• Good bone quality
• Simple fracture pattern
• Standard dual plating

Moderate Complexity:

• C2 fractures
• Metaphyseal comminution
• May need bone graft
• Standard dual plating

High Complexity:

• C3 fractures
• Articular comminution
• Osteoporotic bone
• Consider TEA in appropriate patients

Complexity assessment helps set realistic patient expectations.

History and Physical Examination

Standard Views:

• AP of elbow
• Lateral of elbow
• Oblique views if needed

Key Findings:

• Fracture pattern (T, Y, H, Lambda)
• Degree of comminution
• Articular involvement
• Column fractures

Associated Injuries:

• Radial head fracture
• Coronoid fracture
• Olecranon fracture (terrible triad)

Limitations:

• Overlapping fragments obscure detail
• CT often needed for planning
• May underestimate comminution

Plain radiographs provide initial assessment but CT is usually needed.

Indications:

• All intercondylar fractures for surgical planning
• Assessment of articular comminution
• Fragment size and position

Standard Protocol:

• Thin cuts (1-2mm)
• 3D reconstructions
• Coronal, sagittal, axial planes

Key Information:

• Number and size of articular fragments
• Column fracture patterns
• Trochlear comminution
• Bone quality assessment

Surgical Planning:

• Plate positioning
• Need for bone graft
• Reducibility assessment
• TEA consideration in severe comminution

CT with 3D reconstruction is essential for surgical planning.

MRI:

• Rarely needed acutely
• May help assess ligament injuries
• Useful for chronic cases

Angiography:

• If vascular injury suspected
• Absent pulses after reduction
• Expanding hematoma

Stress Views:

• Not useful acutely
• May be used post-operatively
• Assess stability and ligament healing

Additional imaging is rarely needed for acute fracture management.

Non-operative Management:

• Reserved for non-ambulatory patients
• Severe medical comorbidities precluding surgery
• "Bag of bones" technique (historical, poor outcomes)

Operative Management:

• Standard of care for displaced fractures
• Options: ORIF or Total Elbow Arthroplasty

ORIF Indications:

• Young/active patients
• Good bone quality
• Reconstructable fracture pattern
• High functional demands

TEA Indications:

• Elderly low-demand patients
• Severe osteoporosis
• Unreconstructable articular comminution
• Pre-existing arthritis or RA

Most intercondylar fractures require operative treatment.

Goals:

• Anatomic articular reduction
• Stable bicolumnar fixation
• Allow early motion

Approach Selection:

• Olecranon osteotomy (best visualization)
• Triceps-sparing approaches
• TRAP (triceps-reflecting anconeus pedicle)
• Paratricipital approaches

Fixation Strategy:

• Dual plate fixation mandatory
• Orthogonal (90°) or parallel (180°) plating
• Minimum 2-3 screws per distal fragment
• Interdigitating screws in distal fragments

Sequence:

• Reduce articular surface first
• Provisionally fix with K-wires
• Fix articular block to shaft
• Apply medial then lateral plates (or vice versa)

Dual plate fixation with early motion is the standard of care.

Indications for Primary TEA:

• Age over 65-70 years
• Severe osteoporosis
• Unreconstructable articular comminution (C3)
• Pre-existing arthritis
• Low functional demands

Contraindications:

• Young active patients
• Open fractures (relative)
• Active infection
• Non-compliant patients

Benefits:

• Reliable pain relief
• Early motion
• Avoids complex reconstruction

Limitations:

• Lifelong lifting restriction (5kg)
• Implant longevity concerns
• Revision surgery difficult

TEA is a reasonable option in appropriately selected elderly patients.

Indications:

• Best articular visualization
• Most intercondylar fractures
• Complex articular patterns

Technique:

• Posterior midline incision
• Identify and mobilize ulnar nerve
• Chevron or transverse osteotomy
• Pre-drill for fixation before osteotomy
• Elevate olecranon with triceps attached
• Direct visualization of trochlea

Advantages:

• Best articular visualization
• Direct access to both columns
• Allows anatomic reduction

Disadvantages:

• Creates additional fracture
• Risk of nonunion (2-5%)
• Hardware prominence

Olecranon osteotomy provides best visualization for complex fractures.

Paratricipital Approach:

• Windows medial and lateral to triceps
• Triceps left intact
• Limited articular visualization

Bryan-Morrey Approach:

• Triceps reflected from medial to lateral
• Good exposure
• Risk of triceps weakness

TRAP Approach:

• Anconeus and triceps reflected as unit
• Preserves blood supply
• Good visualization

Indications:

• Simpler fracture patterns
• When avoiding osteotomy preferred
• TEA approach

Triceps-sparing approaches avoid osteotomy complications but limit visualization.

Orthogonal Plating (90°):

• Medial plate: Posteromedial column
• Lateral plate: Posterolateral column
• Plates at 90° to each other
• Creates stable construct

Parallel Plating (180°):

• Both plates on posterior surface
• Medial and lateral columns
• Biomechanically equivalent
• Easier plate application

Technical Points:

• Reduce articular surface first
• Provisional K-wire fixation
• Contour plates carefully
• Minimum 2-3 screws distal fragments
• Interdigitate screws for stability

Screw Direction:

• Distal screws should interdigitate
• Lock in distal fragments
• Maximum stability

Both plating strategies are acceptable - surgeon preference and fracture pattern dictate choice.

Step 1 - Articular Reconstruction:

• Identify key articular fragments
• Reduce trochlea first (medial to lateral)
• Provisional K-wire fixation
• Lag screws for articular fragments

Step 2 - Column Reconstruction:

• Reduce articular block to medial column
• Reduce articular block to lateral column
• Restore column length and alignment

Step 3 - Plate Application:

• Apply first plate (usually medial)
• Apply second plate
• Final tightening
• Check ROM intraoperatively

Sequence: Articular first, then columns, then plates.

Identification:

• Mandatory in all cases
• Posterior to medial epicondyle
• May be involved in fracture

Options:

• In situ: Leave in cubital tunnel (rarely)
• Subcutaneous transposition: Most common
• Submuscular transposition: More involved

Recommendation:

• Most surgeons transpose
• Protects from hardware irritation
• Allows nerve inspection

Post-operative:

• Monitor for symptoms
• Transposition reduces late ulnar neuritis

Ulnar nerve should be identified in all cases and usually transposed.

Tension Band Technique:

• Two parallel K-wires
• Figure-of-eight wire
• Converts tension to compression
• Higher hardware prominence/removal rate

Plate Fixation:

• Pre-contoured olecranon plates
• Intramedullary screw option
• Lower prominence
• More expensive

Key Points:

• Pre-drill before osteotomy
• Anatomic reduction essential
• Check stability before closure

Plate fixation of osteotomy has lower hardware removal rate than tension band.

Most Common Complication:

• Incidence: 20-40%
• Worse with prolonged immobilization
• Worse with heterotopic ossification

Prevention:

• Early motion (within 1-2 weeks)
• Stable fixation
• Consider indomethacin for HO prophylaxis

Treatment:

• Aggressive physiotherapy
• Dynamic splinting
• Manipulation under anesthesia
• Arthroscopic or open release

Functional ROM:

• 30-130° arc adequate for most ADLs
• Loss of terminal extension common
• Loss of flexion more functionally limiting

Early motion is the key to preventing stiffness.

Incidence: 10-20%

Types:

• Pre-operative injury (document!)
• Intraoperative injury
• Post-operative compression/traction

Prevention:

• Careful identification
• Gentle handling
• Transposition in most cases
• Avoid excessive traction

Treatment:

• Observation initially (most recover)
• Transposition if persistent
• Neurolysis if tethered

Most ulnar nerve symptoms resolve with time and transposition.

Nonunion:

• Incidence: 2-10%
• Risk factors: Comminution, poor fixation, infection
• Treatment: Revision with bone graft

Malunion:

• Usually articular incongruity
• Results in arthritis
• May need arthroplasty

Hardware Problems:

• Prominence requiring removal
• Higher with tension band wires
• Lower with plates

Heterotopic Ossification:

• Incidence: 5-10%
• May limit motion
• Prophylaxis controversial

Infection:

• Incidence: 1-5%
• Higher in open fractures
• May need hardware removal

Multiple complications possible - careful technique and early motion minimize risk.

Goals:

• Protect fixation
• Begin early ROM
• Control swelling

Week 0-2:

• Posterior splint at 90° flexion
• Elevation
• Active finger, wrist, shoulder motion

Week 1-2:

• Begin active-assisted elbow ROM
• Remove splint for exercises
• Gravity-assisted flexion
• Extension stretching

Week 2-6:

• Progress ROM exercises
• Active motion all planes
• May use hinged brace for protection
• Continue to avoid loading

Early motion is critical - begin within 1-2 weeks.

Goals:

• Restore strength
• Improve ROM
• Functional activities

Week 6-8:

• Progressive ROM
• Light resistance exercises
• Functional activities

Week 8-12:

• Progressive strengthening
• Increase resistance gradually
• Activity modification

Precautions:

• Avoid heavy lifting until union
• No contact sports
• Avoid falls

Strengthening begins once union progressing on radiographs.

Goals:

• Full function
• Return to work/sport
• Long-term maintenance

Week 12-16:

• Progressive loading
• Sport-specific training
• Work hardening

Week 16+:

• Return to full activities
• Contact sports when strength equal
• May have permanent ROM limitation

Long-term:

• Monitor for arthritis
• Hardware removal if symptomatic
• Some patients never regain full ROM

Most patients achieve functional ROM but some limitation is common.

Functional Results:

• Good to excellent: 75-85%
• Fair: 10-15%
• Poor: 5-10%

Range of Motion:

• Average arc: 100-110°
• Extension loss: 20-30° common
• Flexion usually 120-130°

Complications:

• Stiffness: 20-40%
• Ulnar nerve symptoms: 10-20%
• Hardware removal: 15-25%
• Nonunion: 2-10%

Factors Affecting Outcome:

• Fracture complexity (C1 better than C3)
• Quality of reduction
• Early motion protocol
• Patient compliance

ORIF outcomes are generally good with proper technique and rehabilitation.

Functional Results:

• Pain relief: Excellent in 85-95%
• Satisfaction: High in appropriate patients
• ROM: 100-120° arc typical

Complications:

• Wound problems: 5-10%
• Infection: 5-10%
• Loosening: 10-20% at 10 years
• Revision: 10% at 10 years

Limitations:

• Lifelong 5kg lifting restriction
• No impact activities
• Revision surgery difficult

Patient Selection Critical:

• Best in low-demand elderly
• Poor in young/active patients
• Consider carefully in 65-75 age group

TEA provides reliable results in appropriately selected patients.

Good Prognosis:

• Simple fracture pattern (C1)
• Good bone quality
• Anatomic reduction achieved
• Early motion initiated
• Compliant patient

Poor Prognosis:

• Comminuted articular surface (C3)
• Osteoporosis
• Open fracture
• Delayed treatment
• Associated injuries

Age Considerations:

• Young patients: ORIF preferred despite complexity
• Elderly patients: TEA increasingly used
• 65-75: Individual assessment needed

Fracture complexity and patient factors both influence outcome.

Key Studies