Orthopaedic Surgery - Phalanx Fracture

Basics

Phalangeal fractures are fractures involving the bones of the fingers.

They are classified according to:

Which phalanx is involved — proximal, middle, or distal

Location within the phalanx

Fracture pattern

Degree of complexity or comminution

Open versus closed injury

Stability during motion

Accurate assessment of alignment and associated soft-tissue injury is important because even a well-healed fracture can produce substantial functional impairment if there is:

Rotation

Angular deformity

Joint incongruity

or

Tendon adhesion.

Epidemiology

Phalangeal fractures occur commonly in:

Males in the third through fifth decades of life

and are frequently associated with:

Sports

Occupational injuries

Machinery

Reported incidence has been approximately:

12.5 per 10,000 person-years.

Sports-Related Injuries

In some series of sports-related hand fractures, approximately:

54% involved the phalanges.

Common sports include:

Basketball

Baseball

Football

and other activities involving:

Ball contact

Falls

Direct trauma to the fingers

Pediatric Considerations

Hand fractures are also common in children.

Approximately:

43% of pediatric hand fractures

have been reported to involve the:

Proximal phalanx.

Children have substantial remodeling potential, but certain injuries, particularly:

Phalangeal neck fractures

and

Physeal injuries

require careful assessment because of the risk of deformity or vascular compromise.

Risk Factors

Risk increases with participation in activities involving:

Power tools

Industrial machinery

Manual labor

Contact sports

Ball-handling sports

In children, common mechanisms include:

Skating

Rollerblading

Scooter riding

and falls during recreational activities.

Etiology

The typical mechanism varies with age and activity.

Children

Children older than approximately 10 years frequently sustain fractures from:

Compression or impact injuries.

Adolescents and Young Adults

Between approximately ages:

10 and 39 years

injuries are commonly associated with:

Sports

Contact activities

Ball-handling injuries

Adults

Adults between approximately:

30 and 69 years

commonly sustain fractures from:

Machinery or occupational trauma.

Older Adults

In patients aged approximately:

60 years or older

falls become an increasingly important mechanism.

Other Mechanisms

Additional causes include:

Crush injuries

Motor vehicle collisions

Direct blows

Twisting injuries

Distal Phalanx Fractures

The most common mechanism for a distal phalanx fracture is:

Crush injury.

This frequently occurs after:

Door injuries

Heavy-object impact

or occupational trauma.

Fracture Pattern and Mechanism

A:

Direct blow

commonly produces:

Transverse

or

Comminuted fractures.

A:

Twisting mechanism

more commonly produces:

Oblique

or

Spiral fractures.

Associated Conditions

Patients may also have:

Additional fractures of the hand

Metacarpal fractures

Wrist or forearm injury

Tendon injury

Ligament injury

Neurovascular injury

Diagnosis

Signs and Symptoms

Typical findings include:

Pain

Swelling

Bruising

Finger deformity

Reduced range of motion

Some patients have:

Lacerations

suggesting a possible open fracture.

Numbness

Numbness or altered sensation may occur, particularly when there is:

Significant displacement

Severe swelling

or

Associated digital nerve injury.

History

Important historical details include:

Mechanism of injury

Time elapsed since injury

Patient age

Hand dominance

Occupation

Sports participation

Hobbies

These factors help determine both injury pattern and functional treatment goals.

Physical Examination

Neurovascular Examination

Document:

Capillary refill

Digital sensation

Motor function

Perfusion

before and after reduction.

Tenderness

Palpate the finger carefully to determine:

The exact fracture location

and whether tenderness extends into an adjacent joint.

Open Injury

Inspect the entire digit for:

Lacerations

Puncture wounds

Nail-bed injury

Any wound communicating with the fracture should be treated as an:

Open fracture.

Soft-Tissue Examination

Assess for injury to:

Flexor tendons

Extensor tendons

Collateral ligaments

Digital nerves

Digital vessels

Soft-tissue injury may have greater long-term functional impact than the fracture itself.

Length and Alignment

Compare the injured digit with neighboring fingers.

Assess:

Finger length

Coronal alignment

Sagittal alignment

Rotation

Rotational Deformity

Rotation is particularly important because even small rotational errors can cause substantial functional problems.

Ask the patient to make a:

Composite fist.

Normally, the fingers converge toward the:

Scaphoid region.

If one finger crosses over or under an adjacent finger, this:

Scissoring

indicates rotational deformity.

Rotational deformity is generally:

Poorly tolerated and should be corrected.

Nail Plate Examination

Inspect and compare the nail plate with the adjacent digits.

Look for:

Subungual hematoma

Nail displacement

Nail-bed laceration

Seymour fracture in children

Imaging

Plain Radiographs

Initial imaging should include:

AP

Lateral

and usually

Oblique views.

Whenever possible, radiographs should be centered specifically on the injured finger rather than relying only on a general hand film.

Oblique Views

Oblique radiographs are useful for identifying:

Intra-articular extension

Condylar fractures

Oblique fracture lines

CT

CT is not routinely required for simple fractures.

It may be helpful for:

Complex intra-articular fractures

Comminution

Surgical planning

For suspected radiolucent foreign bodies such as:

Wood or thorns, CT may occasionally assist, although ultrasound can also be useful depending on the material and location.

MRI

MRI can identify:

Soft-tissue injuries

and many types of:

Foreign bodies

but is rarely required for routine phalangeal fracture assessment.

Pathophysiology

The direction of fracture displacement depends heavily on:

Muscle and tendon attachments.

Proximal Phalanx Shaft Fractures

Proximal phalanx shaft fractures often angulate:

Volar or palmar at the apex.

The proximal fragment is typically pulled into:

Flexion by the interosseous muscles

while the distal fragment is influenced by the extensor mechanism.

This can produce a characteristic deformity if reduction is not maintained.

Middle Phalanx Shaft Fractures

Middle phalanx fracture angulation depends on the fracture’s relationship to the:

Flexor digitorum superficialis insertion.

Fractures may therefore angulate:

Volar

or

Dorsal

depending on their location.

Importance of Soft-Tissue Injury

Finger function depends not only on fracture union but also on preservation of:

Tendon gliding

Ligament stability

Neurovascular integrity

Joint motion

This explains why even relatively small fractures can cause prolonged disability when accompanied by severe soft-tissue injury.

Pediatric Phalangeal Neck Fractures

Phalangeal neck fractures in children deserve particular attention because the distal fragment may have a relatively limited blood supply.

These injuries can therefore be associated with:

Avascular necrosis

Malunion

Motion loss

Differential Diagnosis

An important alternative diagnosis is:

Pathological fracture through an underlying bone lesion.

In the hand, the most common benign tumor associated with pathological fracture is:

Enchondroma.

Treatment

General Principles

Most phalangeal fractures can be treated:

Nonoperatively

provided they are:

Stable

Extra-articular

Acceptably aligned

and have:

No rotational deformity.

Treatment usually consists of:

Closed reduction when needed

Splinting or buddy taping

Early protected motion

Operative Indications

Surgery is considered for:

Open fractures

Displaced intra-articular fractures

Fractures with severe soft-tissue injury

Unstable fractures after closed reduction

Rotational deformity

Unacceptable angulation or shortening

Angulation

Marked palmar angulation may cause:

Functional impairment

Extensor lag

Cosmetic deformity

Older criteria considered more than approximately:

25° of palmar angulation

unacceptable in many situations, although acceptable deformity depends on:

Which phalanx is fractured

Which finger is involved

Fracture level

Buddy Taping

Stable nondisplaced or impacted fractures may be treated with:

Buddy taping

in which the injured finger is taped to an adjacent finger that acts as a functional splint.

This is appropriate only when the fracture is:

Truly stable

with:

Minimal angulation

and

No rotation.

Closed Reduction

When reduction is required, a:

Digital nerve block

may be used.

The distal fragment is manipulated to restore:

Length

Rotation

Angular alignment

The reduction must remain stable enough to be maintained with:

Splinting or buddy taping.

Intrinsic-Plus Position

When immobilization of the hand is required, it is generally placed in the:

Intrinsic-plus or safe position.

This typically involves:

MCP joints flexed approximately 70–90°

and

Interphalangeal joints near full extension.

This position helps minimize:

Collateral ligament contracture

and later stiffness.

Immobilization

Stable closed fractures are often protected for approximately:

3–4 weeks.

Children may occasionally require approximately:

4 weeks or slightly longer

depending on fracture pattern and healing.

Adults tend to develop joint stiffness more readily than children.

Importance of Early Motion

Prolonged immobilization is one of the major causes of poor finger outcomes.

When stability permits, motion should begin:

As early as safely possible.

Delaying active motion beyond approximately:

3 weeks

substantially increases the risk of persistent stiffness in many adult injuries.

Physical Therapy

Hand therapy is important when stiffness, swelling, or complex injury is present.

Early Motion

Joints not included in the splint should begin:

Active range-of-motion exercises immediately.

The fractured finger can begin protected motion once sufficient stability is present.

Clinical Healing

Soft-tissue mobilization and more active motion can usually advance when:

Fracture-site tenderness is minimal

and

Gentle manipulation is no longer painful.

This commonly occurs around:

3–4 weeks in uncomplicated fractures.

Postoperative Motion

After surgical fixation, range-of-motion exercises are often started at approximately:

2–4 weeks or earlier

when fixation stability allows.

The purpose of stable fixation is frequently to permit:

Earlier rehabilitation.

Medication

Most patients can be managed with:

Acetaminophen

or

NSAIDs, when appropriate.

Stronger analgesia is rarely required except after:

Severe crush injuries

Open fractures

or

Surgery.

Surgery

Surgical Indications

Operative treatment is appropriate when closed treatment cannot maintain:

Rotation

Length

Angular alignment

or when joint congruity cannot be restored.

Intra-Articular Fractures

Displaced intra-articular fractures require accurate restoration of:

The joint surface

because residual step-off or instability may lead to:

Stiffness

Post-traumatic arthritis

Severe Soft-Tissue Injury

Unstable fractures associated with major tendon or soft-tissue injury may require fixation so that:

Early soft-tissue rehabilitation can proceed safely.

Rotational Deformity

Persistent rotational malalignment is a strong indication for:

Operative correction, because remodeling does not reliably correct clinically significant rotation.

Distal Tuft Fractures

Distal tuft fractures are usually associated with:

Crush injuries.

Treatment often focuses on:

Nail-bed repair

Protection of the fingertip

Management of associated open injury.

The nail plate itself may act as a:

Natural splint.

Pin fixation is occasionally needed when the fracture is:

Markedly displaced or unstable.

Mallet Fracture

Bony mallet injuries involving the dorsal distal phalanx can often be treated with:

Continuous DIP extension splinting, traditionally for approximately 6 weeks or longer.

Surgical indications depend on:

Fragment size

Joint subluxation

Failure of splint treatment

and remain somewhat controversial.

Shaft Fracture Fixation

Options include:

Kirschner wires

Lag screws

Mini-plates

Intramedullary devices

The choice depends on:

Fracture configuration

Soft-tissue condition

Need for early motion.

Plate and Screw Fixation

Open fixation can provide:

Direct visualization

More precise reduction

Stable fixation

This may permit early rehabilitation but can also increase the risk of:

Tendon adhesion

because of additional soft-tissue dissection.

Volar Lip and PIP Fracture-Dislocations

Intra-articular volar fractures involving the base of the middle phalanx may be treated with:

Pinning

Plate fixation

Volar plate arthroplasty

or

Hemihamate reconstruction

depending on:

Fragment size

Joint stability

Percentage of articular surface involved.

Large defects involving approximately:

40% or more of the joint surface

are particularly prone to instability.

Dynamic External Fixation

Dynamic external fixation may be used for:

Severely comminuted

or

Impacted intra-articular fractures

when standard internal fixation would not adequately restore stability.

It allows:

Joint distraction

while maintaining some controlled motion.

Condylar Fractures

Intra-articular condylar fractures may require:

Pin fixation

or

Headless compression screws.

Precise restoration of the:

Articular surface

is essential.

Tension-Band Techniques

Tension-band fixation can supplement stabilization of:

Small or relatively unstable fragments

in selected fracture patterns.

Segmental Bone Loss

Segmental defects require restoration of:

Digital length and alignment.

Treatment may include:

Open reduction

Internal fixation

Bone grafting.

Pediatric Seymour Fracture

A Seymour fracture is an open physeal fracture of the distal phalanx associated with:

Nail-bed injury.

It should be treated as an:

Open fracture

with:

Irrigation

Debridement

Nail-bed repair

Appropriate antibiotics

and stabilization when necessary.

Failure to recognize the injury can lead to:

Infection

Osteomyelitis

Growth disturbance

Salvage Arthroplasty

For irreparable interphalangeal joint destruction, salvage procedures may include:

Silicone arthroplasty

or other joint replacement options.

These may be considered after acute injury or later for:

Post-traumatic joint destruction.

Arthrodesis

Fusion may be preferable to arthroplasty when the primary goals are:

Pain relief

Stability

Durable alignment

particularly when motion cannot be restored reliably.

Follow-Up

Post-reduction radiographs should be obtained:

Immediately

to confirm alignment.

Early Repeat Imaging

Radiographs are often repeated within:

3–7 days

to ensure the fracture has not:

Redisplaced.

This is especially important for fractures considered:

Borderline stable.

Subsequent Imaging

Further radiographs may be obtained approximately every:

4 weeks

until adequate healing is demonstrated.

The schedule should be individualized according to:

Fracture type

Stability

Treatment method

Prognosis

Most uncomplicated phalangeal fractures heal well.

A poorer prognosis is associated with:

Age over approximately 50 years

Associated tendon injury

Joint involvement

Multiple fractures in the same digit

Crush injury

Skin loss

Open injury

Complications

Malunion

Malunion may produce:

Rotational deformity

Lateral deviation

Volar angulation

Articular incongruity

Rotational Malunion

Clinically significant malrotation may require:

Corrective rotational osteotomy.

Angular Malunion

Angular deformity may be treated with:

Closing-wedge osteotomy

or another corrective procedure depending on the direction of deformity.

Intra-Articular Malunion

A poorly aligned joint surface may occasionally require:

Corrective intra-articular osteotomy

in selected patients.

Tendon Adhesions

Tendon adherence is particularly common after:

Crush injuries

Open fractures

Plate fixation

It can markedly limit:

Finger flexion or extension.

Hand Therapy for Adhesions

Intensive hand rehabilitation is the first-line treatment.

Surgical:

Tenolysis

should generally be considered only after:

Passive joint motion has been maximized

and the fracture and soft tissues have fully healed.

Nonunion

Nonunion is uncommon.

It occurs more often in:

Open fractures

than in closed fractures.

Potential causes include:

Severe soft-tissue injury

Infection

Soft-tissue interposition

Poor vascularity

Infection

Infection risk is increased in:

Open fractures

Seymour fractures

Crush injuries

Contaminated wounds

Stiffness

Stiffness is one of the most common and important complications.

Risk increases with:

Immobilization beyond approximately 3 weeks

Joint involvement

Crush injury

Open fracture

Extensive surgical dissection

Patient Monitoring

Follow-up should continue until:

Clinical fracture healing is established

and

Finger function is acceptable.

Monitoring should include:

Pain

Tenderness

Alignment

Rotation

Range of motion

Tendon function

Radiographic healing

Key Principle

Phalangeal fractures should be treated with the dual goals of restoring alignment and preserving finger motion.

The most important deformity to recognize is:

Rotation, because even a small amount can produce substantial scissoring and functional impairment.

Most stable extra-articular fractures can be managed with:

Buddy taping or splinting followed by early protected motion, whereas unstable, open, intra-articular, or rotationally displaced fractures often require:

Operative fixation and structured hand rehabilitation.