Phalangeal Fractures Foot

Phalangeal fractures are the most common fractures of the foot. They involve the proximal, middle or distal phalanx of the great toe (hallux) or of a lesser toe (2nd-5th), and most are treated conservatively with a good outcome. The great toe is the exception: it needs better alignment, and its displaced fractures are the ones fixed.

Who and how often. Toe fractures are a frequent emergency-department and fracture-clinic presentation at all ages, with a median patient age around 40-45 years and no strong sex predominance. In a 339-patient cohort the first toe (38%) and fifth toe (30%) were the most commonly fractured.

Mechanism. Crush is the most common, whether from stubbing the toe or dropping an object on it, and stubbing or crush together account for about 76% of cases; barefoot or open-footwear injuries predominate. Direct trauma to the toe and axial loading during push-off are the other mechanisms. Over 95% of these fractures are displaced less than 2mm and are amenable to conservative care.

Associated injuries. Look for a nailbed laceration, which makes a distal phalanx fracture effectively open, an open crush wound, and an injury to the adjacent metatarsal.

The hallux. The proximal phalanx is the largest and articulates with the first metatarsal. The distal phalanx is smaller, and tuft fractures of it are common. Between them lies the interphalangeal (IP) joint.

The lesser toes. Each has a proximal phalanx articulating with its metatarsal, a middle phalanx and a distal phalanx, and tuft fractures of the distal phalanx are common here too. The fifth toe may have only two: one survey of 102 cadaveric feet found a biphalangeal little toe in 26%, a normal variant that the differential diagnosis below returns to.

Deforming forces. The flexor and extensor tendons act on the great toe. In the lesser toes the forces are similar but less significant, and the intrinsic muscles contribute minimal deforming force.

Why the hallux is held to a stricter standard. It is critical for push-off and gait, and its IP joint is the most important joint. Malunion there is taken to cause arthritis, a claim examined under Outcomes. The lesser toes tolerate displacement: their function is less critical, the adjacent toes compensate, and most heal with conservative treatment.

Toe fractures are described by location, pattern and articular involvement. Location comes first because hallux versus lesser toe decides the management: the hallux (proximal phalanx, distal phalanx, IP joint) is treated conservatively or by ORIF, and the lesser toes (proximal, middle and distal phalanx) usually conservatively.

History. The patient reports pain, swelling localised to the toe and pain on weight bearing after a crush, a stub or direct trauma. Most toe fractures are diagnosed clinically and confirmed on radiographs.

View larger

Examination. Inspect for swelling, ecchymosis (which may be delayed) and deformity in angulation or rotation. Tenderness is over the fracture site, with crepitus if the fracture is unstable and a palpable deformity if it is displaced. Toe movement is limited and painful, weight bearing hurts, and in the great toe test the range and stability of the IP joint.

Alignment. Check every toe for angulation and rotation. The great toe requires better alignment, while the lesser toes usually tolerate displacement; the next section sets out what needs reducing.

Differential diagnosis. The mimics below each carry their own pitfall.

Rotation is the villain. Lesser toes tolerate considerable sagittal and coronal angulation. Malrotation makes the toe scissor or override its neighbour, producing painful footwear conflict, callosities and pressure sores, so in the lesser toes rotation is the key operative indication and the angle is not.

Detecting it. Compare the plane of the nail with the adjacent uninjured toes, since a rotated toe's nail faces the wrong way. Look for scissoring or overlap on weight bearing, and check that the toe points straight on standing. Clinical assessment beats the radiograph for rotation.

The hallux is stricter. The great toe tolerates far less. Articular incongruity of the IP or MTP joint, malrotation, or displacement over about 2mm justify reduction or fixation, because the hallux drives push-off and a malunion there is symptomatic.

The practical rule. Reduce for malrotation, scissoring, an intra-articular step-off (especially in the hallux) or an open injury. Accept modest isolated angulation in a lesser toe that sits straight and fits a shoe.

Radiographs are usually sufficient for diagnosis.

• AP - fracture pattern, displacement and alignment
• Lateral - angulation, and the IP joint of the great toe
• Oblique - may show the fracture better; less commonly needed

CT is rarely needed for a simple fracture. It shows the fracture pattern, articular step-off and displacement, and is recommended when:

• Intra-articular involvement is unclear
• Surgery is being planned
• The fracture pattern is complex

The interphalangeal sesamoid. A rounded ossicle near the hallux IP joint may be a normal interphalangeal sesamoid or a fracture fragment, and a radiograph of the contralateral foot clarifies which. Interposed in a distal phalanx fracture, the sesamoid is an uncommon mechanical block to reduction. The case below follows one such fracture through to union.

View larger

View larger

View larger

Most fractures are treated without surgery. Non-operative treatment suits the non-displaced or minimally displaced fracture, the lesser toes, and the great toe if it is non-displaced. The protocol is buddy taping to the adjacent toe with protected weight bearing for 3-4 weeks.

Follow-up. Serial radiographs monitor healing. Stable, undisplaced fractures, however, need no routine fracture-clinic review, and many units discharge them from the emergency department with self-care advice (Eves and Oddy, below).

Surgical indications. Surgery is rare, and when it is indicated it is done within 1-2 weeks.

• Absolute - great toe displacement greater than 2mm; intra-articular step-off greater than 2mm; open fractures
• Relative - failed conservative treatment; severe displacement in a lesser toe

How firm is 2mm? The threshold is pragmatic, not trial-derived. No randomised data define the cut-off, and in the largest series cited here articular involvement did not predict a worse outcome, although almost every fracture in it was undisplaced. Displaced intra-articular hallux fractures are nonetheless usually fixed, by screw or K-wire, when the step-off exceeds about 2mm, the great toe IP joint being the one that matters. In the lesser toes ORIF is rarely needed, only for severe displacement or open fractures.

ORIF of the great toe is for the displaced or intra-articular fracture above and for an unstable fracture pattern.

1. Exposure - medial or dorsal approach, exposing the fracture and protecting the neurovascular structures
2. Reduction - anatomic, restoring IP joint congruity if the fracture is intra-articular
3. Fixation - screws (1.5-2.0mm) or K-wires (1.0-1.5mm)
4. Verification - reduction and hardware position confirmed fluoroscopically

What fixation offers. It restores alignment and allows early motion. It is also intended to prevent post-traumatic arthritis, but that is a mechanical rationale rather than a demonstrated outcome: no study on this page measured arthritis after either treatment.

K-wire fixation. An alternative to screws for the unstable fracture, and a means of temporary fixation. After closed or open reduction, percutaneous K-wires (1.0-1.5mm) hold the fracture and are removed at 3-4 weeks. The technique is minimally invasive and leaves less hardware.

Anaesthetise first. For a displaced or painful reduction use a digital (ring) block, or a hallux block, at the base of the toe. A bloodless, pain-free field lets you feel the reduction.

The reduction manoeuvre. Apply longitudinal traction, then re-create and reverse the deformity. For a dorsally angulated proximal phalanx, a pencil or a finger placed in the web space acts as a fulcrum to lever the fragment down. Confirm rotation and length clinically, then re-image.

Buddy taping done properly. Strap the injured toe to the adjacent, longer, more stable toe with a gauze or felt spacer between them to prevent skin maceration and pressure sores. Add a rigid-soled or post-operative shoe that offloads toe-off, and encourage early protected weight bearing.

Pitfalls.

• Taping skin-to-skin, which macerates
• Buddy taping across an open or nailbed wound
• Forgetting to re-check neurovascular status and rotation after taping

Immediately after surgery the toe is buddy taped or splinted, weight bearing is protected and toe movement starts early. Physiotherapy is not usually needed.

Arthritis is the number to handle carefully. A post-traumatic IP arthritis rate of around 10-15% is widely repeated for the great toe after intra-articular injury with proper treatment, but it is not established by any study cited on this page, and no series here measured radiographic or symptomatic arthritis at all. Quote it as conventional teaching, not as a figure you can give a patient. The risk factors are intra-articular malunion and displacement.

The comparison that does not hold. A higher figure of 20-30% without treatment is often set beside it. Neither number is sourced here, so the apparent halving of arthritis risk by operating is an untested comparison between two unsourced estimates; do not present it to a patient as a benefit of surgery.

View larger

Global epidemiology. Toe phalangeal fractures are among the most common foot fractures worldwide. The first and fifth toes account for roughly two-thirds of cases, and about three-quarters arise from stubbing or crush in barefoot/open-footwear settings - a pattern reproduced across high- and low-resource populations. Over 95% are minimally displaced.

Related pages: Metatarsal Fractures and Fifth Metatarsal Stress Fractures for the neighbouring forefoot injuries with genuinely different rules - the base of the fifth metatarsal is where a stubbing mechanism often actually breaks; Turf Toe for the hyperextension injury to the same first MTP joint that produces pain without a fracture line; Sesamoid Disorders for the bones under the hallux that fracture, are bipartite in about a tenth of people, and are the other great mimic on a hallux radiograph; Hallux Rigidus for the arthritis this page's fixation is meant to prevent, and for what it actually costs the patient when it develops; Hallux Valgus for the deformity that changes toe loading and footwear tolerance afterwards; Physeal Injuries and the Salter-Harris Classification for the growth plate injured in the paediatric Seymour-equivalent fracture carded here; Stress Fractures Overview for the bone-stress spectrum behind the second proximal phalanx case series; Lisfranc Injuries for the midfoot injury that must not be missed in a "stubbed foot"; and Foot Anatomy and Biomechanics for why the hallux is the toe that matters at push-off.