Monteggia Fracture: Definition, Types, Causes, Diagnosis & Management

Monteggia Fracture: Definition, Types, Causes, Diagnosis & Management

Introduction

A Monteggia fracture is a severe and complex forearm injury characterized by a fracture of the proximal ulna along with dislocation of the radial head at the elbow.
It was first described by Giovanni Battista Monteggia in 1814 and remains one of the most challenging injuries to diagnose and treat because the fracture and joint dislocation must be addressed together.

Monteggia fracture-dislocations are particularly common in children but also occur in adults, typically due to high-energy trauma.

Monteggia fracture


What is a Monteggia fracture?

A Monteggia fracture has two major components:

1. Fracture of the Proximal Ulna

  • Usually in the upper one-third or middle one-third of the ulna

  • Often angulated or displaced

2. Dislocation of the Radial Head

  • Radial head is displaced from its normal articulation with the capitellum

  • Can be anterior, posterior, or lateral depending on injury mechanism

This combination makes the Monteggia fracture unstable and potentially dangerous if not diagnosed early.

Mechanism of Injury

Monteggia fractures commonly result from:

  • Fall on an outstretched hand (FOOSH) with forced pronation

  • Direct blow to the ulna

  • Road traffic accidents (RTA)

  • High-energy trauma

  • Hyperpronation or hyperextension of the elbow

Different mechanisms produce different types of Monteggia injuries.

Classification: Bado Classification (Most Common)

The Bado classification categorizes Monteggia fractures into 4 types based on the direction of radial head dislocation and type of ulnar fracture.

Type I (Most common – 60%)

  • Anterior dislocation of radial head

  • Fracture of proximal or mid-ulna with anterior angulation

Type II

  • Posterior or posterolateral dislocation of radial head

  • Fracture of proximal ulna with posterior angulation

Type III

  • Lateral dislocation of radial head

  • Fracture of ulnar metaphysis

Type IV

  • Fracture of both radius and ulna

  • Anterior dislocation of radial head

Understanding the type is essential for proper treatment planning.

Clinical Features

Symptoms

  • Severe forearm pain

  • Swelling around elbow and proximal forearm

  • Limited elbow movement

  • Pain during forearm supination or pronation

Signs

  • Tenderness along ulna

  • Visible deformity

  • Restricted elbow flexion-extension

  • Radial head prominence near elbow

  • Possible nerve involvement (posterior interosseous nerve palsy)

Diagnosis

1. X-rays

  • Standard AP and lateral X-rays of elbow and forearm

  • Check for ulnar fracture + radial head dislocation

  • Essential to ensure radiocapitellar alignment in ALL views

2. CT Scan

  • Useful in complex fractures

  • Helps surgical planning

3. MRI

  • Rarely used

  • Helpful if ligament injuries are suspected

Treatment & Medical Management

Treatment depends on age, fracture pattern, and stability of the radial head.

1. Management in Adults

Monteggia fractures in adults require surgical stabilization.

A. ORIF (Open Reduction and Internal Fixation)

  • Anatomical reduction of ulna using plating system

  • Radial head often reduces spontaneously once ulna is fixed

  • If radial head remains unstable, ligament repair or pinning may be needed

B. Immobilization

  • Long-arm cast or splint

  • Elbow at 90° flexion

  • Forearm in supination or neutral depending on type

Adults require rigid fixation for optimal healing.

2. Management in Children

Children heal well with less invasive measures.

A. Closed Reduction + Casting

  • Most cases managed non-operatively

  • Closed reduction of ulna, which reduces radial head automatically

  • Above-elbow cast for 4–6 weeks

B. Surgical Fixation

Indicated when:

  • Closed reduction fails

  • Severe displacement

  • Associated radius fracture

Complications

Monteggia fractures can lead to:

  • Chronic radial head dislocation

  • Loss of elbow mobility

  • Malunion or nonunion of ulna

  • Nerve injury (PIN palsy)

  • Elbow instability

  • Persistent pain or stiffness

Early diagnosis prevents long-term deformities.

Prognosis

  • Children: Excellent, especially with closed treatment

  • Adults: Good outcomes with accurate surgery + physiotherapy

  • Delay in diagnosis increases complications

Physiotherapy Management of Monteggia Fracture

Physiotherapy is essential after casting or surgery to restore elbow and forearm function.

🔵 Phase 1: Immobilization Phase (0–4 weeks)

Goals

  • Control pain and swelling

  • Maintain ROM of shoulder, wrist, and fingers

  • Protect fracture fixation

Interventions

  • Elevation and ice

  • Active finger movements

  • Shoulder ROM exercises

  • Wrist flexion/extension exercises

  • Elbow isometrics (if allowed)

  • Gentle grip strengthening

🟡 Phase 2: Early Mobilization (4–8 weeks)

(After cast removal or when cleared by surgeon)

Goals

  • Restore elbow ROM

  • Improve forearm rotation (pronation/supination)

  • Start light strengthening

Interventions

  • Elbow flexion/extension ROM

  • Pronation and supination exercises

  • Passive and active-assisted ROM

  • Gentle stretching

  • Isotonic exercises with theraband

  • Soft tissue mobilization

🟢 Phase 3: Strengthening Phase (8–12+ weeks)

Goals

  • Improve strength, stability, and function

  • Prepare for return to work/sports

Interventions

  • Dumbbell strengthening (1–2 kg)

  • Wrist curls and reverse curls

  • Pronation/supination with resistance stick

  • Closed-chain exercises (wall push-ups)

  • Plyometric and functional drills

  • Coordination/proprioception training

Return to Activities

  • Light activities: 6–8 weeks

  • Heavy work: 12–16 weeks

  • Sports: 3–6 months depending on strength and stability.

Refrences

  1. Ring D, Jupiter JB, Simpson NS. “Monteggia fractures in adults.” J Bone Joint Surg Am. 1998 Dec;80(12):1733-44. PMID: 9875931. PubMed

  2. Perez ML, Lamas C, Martínez I, Pidemunt G, Mir X. “Monteggia fractures in adults. Review of 54 cases.” Chir Main. 2002 Oct;21(5):293-7. PMID: 12491706. PubMed

  3. Beutel BG. “Monteggia fractures in pediatric and adult populations.” Orthopedics. 2012;35(2):e198-205. PMID: 22300997. PubMed

  4. He JP, et al. “Comparison of treatment methods for pediatric Monteggia fracture: Met vs missed radial head dislocation.” Medicine (Baltimore). 2019 Jan;98(2):e13942. PMID: 30633171. PubMed

  5. Kim JM, London D. “Complex Monteggia Fractures in the Adult Cohort: Injury and Management.” J Am Acad Orthop Surg. 2020 Oct;28(19):e839-e848. PMID: 32649440. PubMed

  6. Yıldırım A, Nas K. “Rehabilitation of neglected Monteggia fracture: Dislocations in children.” J Back Musculoskelet Rehabil. 2017;30(6):1251-1257. PMID: 29154266. PubMed

  7. Mathur N, et al. “Monteggia fracture: an easy fracture to miss.” Skeletal Radiol. 2020;49(10):1605-1611. PMID: 32086608. PubMed

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