Orthopaedic Surgery - Triangular Fibrocartilage Complex Tear

Basics

The:

Triangular fibrocartilage complex

or

TFCC

is a group of ligamentous and fibrocartilaginous structures located on the:

Ulnar side of the wrist.

It is an important stabilizer of the:

Distal radioulnar joint

during:

Pronation

and

Supination.

Load Transmission

The TFCC also contributes to transmission of axial load across the:

Ulnocarpal wrist.

Approximately:

20% of load across the wrist

may normally be transmitted through the:

Ulnar-sided structures.

Anatomy

The TFCC extends broadly between the:

Distal radius

and

Ulna

with attachments extending from the region of the:

Ulnar styloid and fovea

toward the:

Sigmoid notch of the distal radius.

Components

The TFCC includes the:

Triangular fibrocartilage disc proper

Dorsal distal radioulnar ligament

Volar distal radioulnar ligament

Meniscus homolog

Ulnar collateral ligament

Ulnotriquetral ligament

Ulnolunate ligament

and

Extensor carpi ulnaris tendon subsheath.

Deep Component

The deep portion of the radioulnar ligament complex inserting into the:

Ulnar fovea

has historically been termed the:

Ligamentum subcruentum.

This component is especially important for:

Distal radioulnar joint stability.

Meniscal Variant

Some wrists contain a true:

Meniscal-like structure

with a free edge that may be visible during:

Arthroscopy.

Clinical Importance

TFCC injury may produce:

Acute

or

Chronic ulnar-sided wrist pain.

Symptoms are often aggravated by:

Forearm rotation

Grip

and

Axial loading.

Classification

The:

Palmer classification

divides TFCC lesions into:

Traumatic Class 1

and

Degenerative Class 2 injuries.

Palmer Class 1

Class 1 lesions are:

Traumatic.

Type 1A

Type 1A is a:

Central perforation.

Because the central TFCC is relatively:

Avascular

these tears have limited spontaneous healing capacity.

Type 1B

Type 1B is a tear of the:

Ulnar attachment.

These peripheral injuries may involve the:

Foveal or styloid attachment

and can produce:

Distal radioulnar joint instability.

Type 1C

Type 1C represents detachment of the TFCC from its:

Carpal attachment

including injury to the:

Volar ulnocarpal ligaments.

Type 1D

Type 1D is a tear involving the:

Radial attachment

of the TFCC.

Palmer Class 2

Class 2 lesions are:

Degenerative.

They often result from chronic:

Ulnocarpal loading

and may be associated with:

Positive ulnar variance.

Ulnar Positive Variance

When the ulna projects farther distally than expected relative to the radius, increased loading across the:

TFCC

and

Ulnocarpal joint

may contribute to:

Degenerative tearing.

Epidemiology

TFCC tears are increasingly recognized because of improvements in:

Clinical examination

MRI

and

Wrist arthroscopy.

Age

Symptomatic tears are commonly encountered between approximately:

30 and 60 years of age.

Risk Factors

Activities that repeatedly load the wrist during:

Pronation-supination

Radial-ulnar deviation

or

Heavy lifting

increase stress on the:

TFCC.

Sports and Occupational Exposure

Examples include activities involving:

Racquet sports

Gymnastics

Weight lifting

Manual labor

or repetitive:

Forearm rotation.

Etiology

Traumatic tears may result from forceful:

Hyperpronation

or

Wrist dorsiflexion.

Mechanism

A fall onto the hand or twisting injury can produce excessive stress across the:

TFCC

and

Distal radioulnar joint.

Associated Fractures

TFCC injury may occur with fractures of the:

Distal radius

Distal ulna

or both bones.

Distal Radioulnar Joint

A major TFCC tear may function biomechanically like disruption of the:

Distal radioulnar stabilizers

and produce:

DRUJ instability.

Diagnosis

Diagnosis is based on:

History

Focused physical examination

and

Imaging.

Arthroscopy

Wrist arthroscopy remains the:

Gold standard

for directly identifying and characterizing a:

TFCC tear.

However, many patients can initially be evaluated using:

Clinical examination and MRI.

Signs and Symptoms

The most common complaint is:

Ulnar-sided wrist pain.

Provocative Activities

Pain is often worsened by:

Pronation

Supination

Gripping

and

Axial loading of the wrist.

Trauma History

Many patients recall a specific:

Traumatic event.

Others, particularly those with degenerative tears, may describe more gradual:

Symptom onset.

Clicking

Patients may experience:

Clicking

Snapping

or

Catching

particularly during:

Forearm rotation.

Physical Examination

The examination should carefully localize the source of:

Ulnar-sided wrist pain.

Range of Motion

Assess wrist and forearm:

Flexion

Extension

Radial deviation

Ulnar deviation

Pronation

and

Supination.

Crepitus and Snapping

Examine for:

Crepitus

Clicking

Painful snapping

and

Instability.

TFCC Compression Test

The TFCC compression test is a provocative maneuver.

The examiner applies:

Axial load

while rotating the:

Ulnar-deviated wrist.

Positive Compression Test

Reproduction of:

Ulnar-sided pain

or a painful:

Click

supports TFCC or ulnocarpal pathology.

Foveal Tenderness

Tenderness in the soft spot between the:

Ulnar styloid

and

Flexor carpi ulnaris tendon

near the ulnar fovea may support a:

Peripheral TFCC injury.

DRUJ Examination

Assess the distal radioulnar joint for:

Translation

Pain

and

Instability

in:

Neutral

Pronation

and

Supination.

ECU Examination

The:

Extensor carpi ulnaris tendon

should be palpated during wrist flexion-extension and:

Pronation-supination.

This helps identify:

ECU tendinitis

or

ECU tendon subluxation

as alternative causes of:

Ulnar-sided pain.

Imaging

Plain Radiographs

Standard:

AP

and

Lateral wrist radiographs

are obtained initially.

Purpose of Radiographs

Radiographs help identify:

Fracture

Arthritis

Malalignment

and abnormalities of:

Ulnar variance.

DRUJ Instability

Radiographs obtained in different forearm positions may occasionally help assess:

Distal radioulnar joint alignment.

Ulnar Variance

Ulnar variance should be measured on appropriately positioned:

Neutral-rotation radiographs.

A standardized:

90-90 view

may also be used, with the shoulder abducted approximately 90° and the elbow flexed:

90°.

CT

CT of both wrists may help assess:

DRUJ congruity

and

Rotational instability

particularly when comparison with the contralateral side is useful.

MRI

MRI is commonly used for detailed evaluation of:

TFCC morphology

and associated:

Wrist pathology.

3-Tesla MRI

High-resolution:

3-Tesla MRI

may improve visualization of:

TFCC tears.

MR Arthrography

MR arthrography may be useful when conventional MRI is:

Equivocal.

Arthrography

A full-thickness TFCC tear may permit contrast to pass between the:

Radiocarpal joint

and

Distal radioulnar joint.

Normally, these spaces do not freely:

Communicate.

Differential Diagnosis

The differential diagnosis for ulnar-sided wrist pain includes:

Distal radius fracture

Distal ulna fracture

Carpal fracture

ECU tendinitis

ECU subluxation

FCU tendinitis

Lunotriquetral ligament injury

Ulnocarpal arthritis

Pisotriquetral arthritis

DRUJ arthritis

Ulnar impaction syndrome

and

Ulnar artery thrombosis.

Treatment

Treatment depends on:

Traumatic versus degenerative origin

Fracture association

DRUJ stability

Tear location

and

Ulnar variance.

Associated Fracture

If a TFCC injury occurs with a distal forearm fracture, the fracture should first be:

Reduced and stabilized.

DRUJ Assessment

After reduction of a distal radius or ulna fracture, the:

Distal radioulnar joint

should be checked for:

Congruity and stability.

Acute Repair With Fracture Surgery

When operative fracture fixation is required and significant TFCC instability remains, acute:

TFCC repair

may be performed.

Injury Without Fracture

Initial treatment for an isolated stable TFCC injury is usually:

Nonoperative.

Immobilization

A:

Below-elbow cast or brace

may be used with the forearm near:

Neutral rotation.

Duration

Immobilization may continue for approximately:

4–6 weeks

depending on symptoms and:

Stability.

Long-Arm Immobilization

When control of:

Pronation and supination

is particularly important, some clinicians use:

Long-arm immobilization

or a brace that limits:

Forearm rotation.

Analgesia

Short-term:

Analgesic medication

may be used during the acute phase.

Range of Motion

After immobilization, gentle:

Wrist

and

Forearm range of motion

is gradually reintroduced.

Corticosteroid Injection

In chronic stable TFCC pain, a:

Corticosteroid injection

may provide temporary:

Symptom relief.

Persistent Symptoms

Continued:

Pain

or

Instability

despite adequate conservative treatment should prompt further:

Assessment

and consideration of:

Surgery.

Physical Therapy

Hand therapy is useful when injury or immobilization has caused:

Wrist stiffness

or reduced:

Forearm rotation.

Rehabilitation Goals

Therapy focuses on restoring:

Wrist ROM

Pronation-supination

Grip strength

and controlled return to:

Activity.

Medication

Oral analgesics are generally required only during the:

Acute symptomatic period.

Surgery

Surgical treatment depends heavily on:

Tear location

and whether the DRUJ is:

Stable or unstable.

Peripheral TFCC Tear

A repairable peripheral tear may be treated with:

Arthroscopic

or

Open repair.

Healing Potential

Peripheral TFCC tissue has a better:

Blood supply

than the central disc.

Therefore, peripheral tears are more suitable for:

Repair.

Central Tear

Central TFCC tears without instability are generally treated with:

Arthroscopic debridement

rather than:

Repair.

Reason for Debridement

The central TFCC is relatively:

Avascular

and has limited capacity for:

Biologic healing.

Ulnar Positive Variance

When degenerative tearing is associated with substantial:

Positive ulnar variance

treatment may need to reduce:

Ulnocarpal loading.

Ulnar Shortening Osteotomy

An:

Ulnar shortening osteotomy

may be performed to decrease:

Ulnocarpal contact pressure

and unload the:

TFCC.

Wafer Procedure

When only a small amount of shortening is required, typically less than approximately:

2–3 mm

a:

Wafer procedure

may be considered.

DRUJ Reconstruction

Chronic instability with irreparable TFCC tissue may require reconstruction of the:

Distal radioulnar joint stabilizers

using:

Tendon graft

or

Fascial tissue.

Advanced DRUJ Arthritis

In severe cases with advanced:

Distal radioulnar arthritis

a salvage procedure may be required.

Sauvé-Kapandji Procedure

One option is the:

Sauvé-Kapandji procedure

which combines:

DRUJ arthrodesis

with creation of a proximal ulnar:

Pseudoarthrosis

to preserve:

Forearm rotation.

Follow-Up

Postoperative immobilization varies according to:

Repair type

and

Stability.

Immobilization Duration

Patients may be immobilized for approximately:

2–8 weeks

after surgery.

Rehabilitation

After sufficient healing, therapy progresses through:

Range of motion

Strengthening

and

Functional loading.

Return to Sports

Return to unrestricted sports is often expected at approximately:

5–6 months

after major repair, although timing depends on:

Healing

Strength

and

Procedure performed.

Prognosis

The overall prognosis is generally:

Fair to good.

Persistent Pain

Some patients continue to experience:

Ulnar-sided wrist pain

despite adequate:

Treatment.

Long-Term Degeneration

Posttraumatic degenerative change may develop:

Years or decades

after the initial injury.

Complications

Potential complications of surgery include:

Infection

Nerve injury

Iatrogenic cartilage damage

Tendon injury

Persistent pain

and

Complex regional pain syndrome.

Persistent Instability

Failure of repair or unrecognized deep foveal injury may lead to persistent:

DRUJ instability.

Stiffness

Prolonged immobilization may result in:

Wrist stiffness

or loss of:

Pronation-supination.

Clinical Summary

Typical presentation: Ulnar-sided wrist pain after trauma or repetitive loading, often worsened by pronation-supination, gripping, or axial loading.

Key anatomy: The TFCC stabilizes the distal radioulnar joint and transfers part of the load across the ulnar wrist.

Key examination: Localize ulnar-sided tenderness, perform the TFCC compression test, assess DRUJ stability, and examine the ECU tendon.

Imaging: Start with AP and lateral wrist radiographs and assess ulnar variance; MRI is useful for soft-tissue evaluation, while arthroscopy remains the diagnostic gold standard.

Treatment: Stable injuries are initially treated with immobilization, analgesia, and gradual rehabilitation.

Surgery: Peripheral tears may be repaired, whereas central avascular tears are usually arthroscopically debrided.

Positive ulnar variance: Degenerative tears associated with ulnar impaction may require ulnar shortening or a wafer procedure.

Main complications: Persistent pain, DRUJ instability, stiffness, posttraumatic arthritis, and CRPS.

Key Principle

The TFCC is a complex ulnar-sided stabilizing structure of the wrist and distal radioulnar joint.

TFCC tears typically present with:

Ulnar-sided wrist pain, clicking, and pain during forearm rotation or axial loading.

Diagnosis combines:

Focused clinical examination, radiographs, and MRI, while:

Wrist arthroscopy

remains the most definitive diagnostic method.

Stable acute injuries are usually treated with:

Immobilization and rehabilitation.

When surgery is necessary:

Peripheral vascular tears are repaired, whereas:

Central avascular tears are usually debrided.

Associated:

Positive ulnar variance, ulnar impaction, or DRUJ instability

must be recognized and addressed to optimize long-term outcome.