A tibial plateau fracture is an intra-articular fracture of the proximal tibia that threatens knee alignment, stability and the joint surface. At the ST3 T&O interview it is managed in stages: the soft tissue envelope decides the timing, a spanning external fixator holds the high-energy injury, and definitive fixation waits until the swelling allows it.
Key takeaways
- The Schatzker classification (1979) groups tibial plateau fractures into six types by fracture line and depression; types I to IV are unicondylar, V and VI bicondylar and high energy.
- Luo's three-column concept (2010) uses CT to add the posterior column, which a lateral plate alone does not address.
- The July 2025 BOAST on compartment syndrome states that patients at risk should be assessed hourly and that immediate decompression should follow a diagnosis.
- Egol's staged protocol (2005) of spanning external fixation then delayed definitive fixation gave 5% deep infection and 4% nonunion in 57 high-energy fractures.
- The COTS randomised trial (2006) found 18% deep infection after dual-plate ORIF of bicondylar fractures, against similar two-year function with a circular fixator.
- The December 2017 BOAST on open fractures sets antibiotics within one hour, debridement within 12 hours for high-energy injuries, and soft tissue cover within 72 hours.
What is a tibial plateau fracture and how is it classified?
A tibial plateau fracture is classified with the Schatzker system, published from the Toronto experience of 1968 to 1975, which divides fractures into six types by fracture line orientation and degree of depression.
Type I is a lateral split, type II a lateral split with depression, type III a pure lateral depression, and type IV a medial condyle fracture; these are the unicondylar, lower-energy patterns.
Type V is bicondylar and type VI is bicondylar with dissociation of the metaphysis from the diaphysis; published series group V and VI together as the complex, high-energy tibial plateau fractures.
Luo and colleagues (2010) added the CT-based three-column concept, dividing the plateau into lateral, medial and posterior columns so that a posterior fragment is recognised and fixed through its own approach.
In practice the panel wants the type, the columns involved, and whether this tibial plateau fracture is low or high energy, because that decides everything that follows.
Why does the soft tissue envelope decide the timing of tibial plateau surgery?
The soft tissue envelope decides timing because a high-energy tibial plateau fracture is a soft tissue injury with a broken bone inside it: swelling, fracture blisters, degloving and compartment syndrome all sit over the surgical field.
Egol's prospective protocol (2005) placed a knee-spanning external fixator on the day of admission and delayed definitive fixation until the soft tissues allowed, reporting 3 deep infections (5%) in 57 fractures.
The authors concluded that the benefits of temporary spanning fixation are osseous stabilisation, access to the soft tissues and prevention of further articular damage.
That said, a low-energy Schatzker I to III tibial plateau fracture with a calm envelope can proceed to early definitive fixation; staging is for the injured envelope, not every plateau.
How should you assess a tibial plateau fracture at presentation?
Assessment of a tibial plateau fracture begins with ATLS for a high-energy mechanism, then the limb: skin integrity, swelling and blisters, compartments, distal pulses and a documented neurological examination.
A medial plateau fracture or a fracture-dislocation pattern carries a risk to the popliteal vessels, and the BOA publishes a separate BOAST on arterial injuries associated with musculoskeletal trauma that applies if pulses are asymmetric.
NICE NG38 states that the Ottawa knee rules should be used to decide whether an X-ray is needed in people over two years with a suspected knee fracture.
Radiographs show the tibial plateau fracture; CT defines the columns, the depression and the posterior fragment for planning, and MRI is reserved for suspected meniscal or ligament injury that would change the operation.
What is the initial management of a tibial plateau fracture?
Initial management of a tibial plateau fracture is analgesia, a well-padded splint or brace for a low-energy injury, elevation, and hourly compartment checks for a high-energy one.
A high-energy, shortened or grossly unstable tibial plateau fracture goes to theatre for a knee-spanning external fixator, restoring length and alignment while the soft tissues recover (Egol 2005).
An open tibial plateau fracture follows the December 2017 BOAST on open fractures: intravenous antibiotics ideally within one hour of injury, photograph and dress the wound, and combined orthoplastic planning.
The same BOAST states debridement should be within 12 hours for solitary high-energy open fractures, within 24 hours for low-energy ones, and immediately for gross contamination or vascular compromise.
How do you recognise and treat compartment syndrome with a tibial plateau fracture?
Compartment syndrome after a tibial plateau fracture is recognised clinically: the July 2025 BOAST names pain out of proportion to the injury and pain on passive stretch of the compartment muscles as the key findings.
The BOAST states that patients at risk should be assessed hourly with documentation, and that circumferential dressings should be released, the limb elevated and the patient re-evaluated within 30 minutes.
Where the examination is inconclusive or impossible, the BOAST asks for pressure monitoring: a difference between diastolic pressure and compartment pressure under 30 mmHg indicates increased risk.
The July 2025 BOAST states that immediate surgical decompression should follow a diagnosis, using a two-incision four-compartment fasciotomy, with plastic surgery discussion within 24 hours and re-exploration within 72 hours.
What is the definitive management of a tibial plateau fracture, and what does the evidence say?
Definitive management of a tibial plateau fracture aims to restore the joint surface, the mechanical axis and stability so the knee can move early. Depressed fragments are elevated and supported, and the condyle is buttressed.
A lateral split or split-depression fracture is fixed through a lateral approach with a buttress or locking plate; a medial or posteromedial fragment needs its own medial or posteromedial approach and plate.
Bicondylar tibial plateau fractures are fixed with dual plating through two incisions, or with a circular external fixator combined with limited percutaneous reduction.
The Canadian Orthopaedic Trauma Society trial (2006) randomised 83 bicondylar fractures to dual-plate ORIF or a circular fixator. Reduction quality was similar and two-year function did not differ.
However, 7 of 40 ORIF patients (18%) developed deep infection, hospital stay was 23.4 versus 9.9 days, and unplanned reoperations were 37 against 16, all favouring the fixator.
Luo's 29-patient cohort of three-column fixation through combined posterior and anterolateral approaches reported no infections and no revision surgery, supporting a column-specific approach for posterior fragments.
Which BOAST standards frame the care of a tibial plateau fracture?
Three clinical BOASTs frame a tibial plateau fracture: open fractures (December 2017), compartment syndrome (July 2025) and arterial injury associated with musculoskeletal trauma, plus the process BOAST on mobilisation and weight-bearing.
The open fracture BOAST states that definitive internal stabilisation should only be carried out when it can be immediately followed by definitive soft tissue cover, and cover within 72 hours of injury.
The compartment syndrome BOAST states that a delayed diagnosis carries high surgical risk, that two consultants should decide, and that non-operative management with renal protection is an option in that setting.
What are the complications of a tibial plateau fracture?
The complications of a tibial plateau fracture are compartment syndrome, infection and wound breakdown, stiffness, malunion with axis deviation, nonunion of the metaphysis and post-traumatic osteoarthritis.
Infection is the complication that the evidence quantifies: 18% deep infection after dual-plate ORIF in the COTS trial, against 5% with a staged protocol in Egol's series.
A 2026 cohort of 106 operated tibial plateau fractures reported that 19.8% already showed Kellgren-Lawrence grade 3 to 4 osteoarthritis at 12 months, with lower KOOS scores in that group.
The COTS authors noted that, regardless of treatment, patients with a bicondylar tibial plateau fracture had substantial residual limb and general health deficits at two years.
What is the interviewer listening for on tibial plateau fractures?
The interviewer is listening for you to put the soft tissues before the bone: compartment checks by name from the BOAST, a spanning fixator for the high-energy tibial plateau fracture, and a CT before you plan.
They want to hear the Schatzker type and the column, why a posteromedial fragment cannot be fixed from the lateral side, and what the COTS trial changed about bicondylar fractures.
A strong candidate quotes numbers: hourly assessment and a 30 mmHg differential from the compartment BOAST, 12 and 24 hours from the open fracture BOAST, and 18% infection from COTS.
What are the common mistakes with tibial plateau fractures?
The commonest mistake with a tibial plateau fracture is rushing a swollen, blistered high-energy knee to plating, which is exactly the wound complication the COTS and Egol data warn about.
Others are describing the fracture without a CT, missing the posterior column, forgetting the popliteal artery in a medial or fracture-dislocation pattern, and documenting compartments as "soft" without a time.
Candidates also forget that a nerve block, per the BOAST, needs joint decision-making and a documented plan for who monitors the compartments afterwards.
How this comes up at the ST3 interview
A tibial plateau fracture arrives at the ST3 T&O clinical station as a radiograph of a bicondylar injury in a 45-year-old motorcyclist, with a swollen knee and a question about what you do tonight.
The follow-ups are what you look for on the ward, when you would measure compartment pressures, what a spanning fixator achieves, when you convert to definitive fixation, and which approach reaches a posteromedial fragment.
orthointerview's question bank runs to 782 questions across 100 scenarios with AI-marked spoken practice, so this sequence can be rehearsed aloud until the BOAST timings come without hesitation.