Terminology

• Intra-articular distal tibial fracture – fracture of the distal tibia extending into the tibiotalar joint, commonly called a pilon fracture.
• Extra-articular distal tibial fracture – fracture of the distal one-third of the tibial shaft without extension into the ankle joint.
• Delta frame – a triangular modular external fixator configuration commonly used in distal tibial fractures to provide temporary stabilization while bridging the ankle joint.

Trauma mechanism 

Open distal intra-articular tibial fractures are commonly caused by high-energy trauma, including road traffic accidents, falls from height, occupational injuries, sports injuries, and interpersonal violence. These injuries predominantly affect young adults, more frequently males.

Because these fractures are open and involve the articular surface, they carry a substantial risk of infection, which can negatively affect outcomes. Prompt, appropriate soft-tissue management is therefore essential.

Management in the ER

General initial management principles apply:

Initial evaluation and management in open fractures in the ER

Specific points for open distal tibial fractures are:

• Vascular status – Palpate the dorsalis pedis and posterior tibial pulses before and after realignment, and proceed to urgent surgical exploration if pulses remain absent.
• Neurological examination – test the deep peroneal nerve (EDL/EHL), tibial nerve (FDL/FHL), superficial peroneal nerve (dorsal foot sensation), and sural nerve (lateral foot sensation).
• Compartment syndrome – Consider and manage accordingly if pain persists despite adequate analgesia on the reversed WHO pain ladder.

Temporary stabilisation in the ER can be achieved posterior back slab. If displaced, reduce by traction before splinting. Temporary calcaneal pin traction is a less commonly used alternative.

AP and lateral imaging of the lower leg and foot is essential to identify associated injuries of the calcaneus, talus, Chopart joint, or Lisfranc joint.. A CT, if available, is useful for planning definitive fixation and is often obtained after temporary spanning with an external frame.

Fracture management plan

How to make an Open Fracture Management plan

Non-operative management

As with other open fractures, there is generally no place for definitive non-operative treatment in open distal tibial fractures. Intra-articular (pilon) fractures in particular require accurate reduction of the articular surface, which cannot be achieved or maintained non-operatively. Only undisplaced extra-articular fractures with minimal soft-tissue damage (Gustilo-Anderson grade 1) could be considered for non-operative management. In very limited resource settings where internal and/or external fixation is unavailable, it might be your only option, even for less favourable fracture patterns.

Non-operative management consists of immobilization with a posterior below-knee splint, followed by conversion to a circular below-knee cast once swelling has reduced. Given the limited soft-tissue envelope over the distal tibia, non-operative stabilisation is only feasible if the soft tissues allow a cast; a window in the plaster can be used for wound care where needed. Confirm unchanged alignment during follow-up, as reduction close to the ankle joint is easily lost. Conversion to a walking cast can be considered after about 6–8 weeks, with close follow-up during mobilization. Alternatively, calcaneal pin traction can be used to stabilize open fractures when there is significant soft-tissue injury.

Non-Operative Management of open fractures

Operatieve management

For distal tibial fractures involving the ankle joint, plate osteosynthesis is generally the preferred definitive treatment. In extra-articular fractures with sufficient distal bone stock (typically >4 cm proximal to the ankle joint), intramedullary nailing is usually preferred. Both internal fixation strategies should only be performed in settings with adequate surgical resources, limited wound contamination, and reliable soft-tissue coverage – through primary closure or flap reconstruction – in the same procedure.

Because soft tissues are often severely compromised in distal tibial fractures, a two-stage strategy is frequently preferred: temporary stabilization with a modular external fixator, often combined with temporary soft-tissue coverage using vacuum-assisted therapy, followed – preferably within one week – by conversion to internal fixation with plate osteosynthesis together with definitive soft-tissue coverage using locoregional or free flap reconstruction.

In selected patients unsuited to internal fixation, or with delayed soft-tissue recovery, external fixation may serve as definitive treatment; ring fixation is generally preferred, although in practice the initially applied modular fixator is often used until union. In low-resource settings without internal fixation or advanced soft-tissue reconstruction, external fixation may likewise serve as the definitive strategy – when applied correctly, with adequate stability, this can achieve union without infection, although ankle motion may remain limited.

Amputation
Below-the-knee amputation should ultimately be considered and discussed with the patient in cases of severe fractures with vascular injury, or extensive soft-tissue damage such as crush necrosis. In both high- and low-resource settings, limb salvage in these circumstances often means prolonged, complication-prone treatment, whereas amputation with appropriate prosthetic fitting can offer a shorter, more predictable recovery and, for some patients, a better ultimate quality of life

External fixator for a distal tibial fracture

General principles of external fixation apply:

Applying a temporary external fixator

When applying an external fixator for a distal tibial fracture, follow some specific considerations:

• Safe zones - Keep tibial pins within recognised safe zones, staying medial to the tibial crest on the anteromedial side of the tibia to avoid the tibial artery and deep peroneal nerve, at an angle of up to 20° anterior to posterior relative to the sagittal plane. Use a vertical reference line drawn from the medial malleolus to the plantar edge of the heel. A pin can be inserted medially in the area shown below.

• Construct choice - A modular fixator is preferably applied above the ankle joint to preserve ankle motion, following the standard tibial-shaft technique described in Applying an External fixator — possible only when distal pins can be placed safely in the distal tibial segment without violating the joint. When the fracture involves the ankle joint, or safe distal tibial pin placement is not possible, an ankle-joint-spanning modular external fixator — a triangular delta frame — is indicated instead
• Delta frame - place two 5–6 mm half pins in the tibial midshaft (near–far principle), and a transcalcaneal pin — a 5 mm centrally threaded pin from medial to lateral through the posterior calcaneus, one finger-breadth anterior to the posterior edge and one finger-breadth cranial to the plantar surface (use the uninjured foot as a reference if swelling obscures landmarks). Protect the flexor tendons and neurovascular structures, and use a soft-tissue protector before drilling.

Adding stability 

1 Add an additional pin in the first metatarsal shaft (or medial cuneiform/talar neck), connected to the anterior bars, keeps the foot in a neutral position.

2 Maximise pin spread within each bone segment;

3 Use the thickest pins (6 mm) and bars the system allows;

Technical considerations

Plan ahead - Position pins with future definitive fixation and soft-tissue reconstruction in mind. One connecting bar can be temporarily removed at the wound site to improve access during repeat debridement.

Drill guide - Use a tissue protector for drilling.

Soft Tissue Management

The reconstructive ladder is helpful in deciding your strategy. Start with the simplest effective option, but do not oversimplify.

Soft tissue management in open fractures

For small to medium-sized defects with exposed bone, local transposition or rotation flaps may provide reliable coverage. For larger defects of the lower leg, some locoregional options include:

Aftercare

Postoperative rehabilitation

1  Pin-site care – Because of the soft metaphyseal bone, pins loosen more easily in the proximal tibia, and their proximity to the knee raises the risk of septic arthritis if infected – good pin-site care and monitoring are essential.

2  Early mobilization /  Weight-bearing – 

3 Follow-up - Close clinical follow-up is essential; functional recovery can continue for up to a year, particularly in complex cases, with physiotherapy focused on knee and ankle range of motion to prevent long-term stiffness. Complications of fracture management in open fractures

Aftercare after modular external fixation

Complications of fracture management in open fractures