Tibial Plateau Fracture ORIF

Indication. Operate on a displaced tibial plateau fracture — one with articular stepoff or depression, condylar widening, or loss of the mechanical axis — that cannot be reduced and held non-operatively. The thresholds and the drive to operate come from three surgical goals that hold for every pattern: restore articular congruity (most authorities target less than 2 mm of residual stepoff), restore the condylar width and mechanical axis, and build a buttress construct that stops the split fragment from redisplacing. Alignment and joint stability correlate with long-term function at least as strongly as the residual articular stepoff, so the axis is never negotiable. Before committing to fixation, frame the limb through three decisions that change everything about the operation:

Systematic patient assessment. Work through the limb in the same order every time:

• Vascular: foot pulses, capillary refill, ABPI; CT-angiography if ABPI less than 0.9 or any asymmetry.
• Compartment syndrome: serial assessment; pain on passive stretch and pain out of proportion are the earliest reliable signs; measure pressures with any doubt (delta-p less than 30 mmHg means fasciotomy).
• Neurological: document the common peroneal nerve specifically (foot drop, first web-space sensation).
• Soft tissues: blisters, abrasions, degloving (Morel-Lavallee lesion), open wounds — these decide staging.
• Associated injuries: lateral meniscus (split-depression), ACL and collaterals (high-energy), and screen for the dislocation-equivalent injury complex. Imaging.
• Plain radiographs: AP, lateral, and oblique (internal and external) views; a 10-15 degree caudal "plateau" view assesses articular depression and the posterior slope.
• CT with 2D and 3D reconstruction: essential for any displaced fracture — quantifies depression, defines fragment number and the posterior column, and plans approaches and plates.
• CT-angiography: mandatory for a medial (Schatzker IV) fracture or any abnormal pulse or ABPI — the knee-dislocation-equivalent mechanism threatens the popliteal artery.
• MRI: not routine acutely; defines meniscal and ligamentous injury when relevant, but should not delay surgery. Staging and timing. High-energy injuries (Schatzker IV, V, VI, open fractures, or compartment syndrome) get a knee-spanning external fixator on the day of injury to restore length and alignment and to let the soft tissues recover; definitive ORIF follows once the skin wrinkles and blisters epithelialise, typically 7-21 days. This staged protocol substantially reduces deep infection and wound breakdown. Lower-energy patterns (Schatzker I-III) can usually proceed to definitive fixation early once swelling permits and the soft-tissue envelope is acceptable. Consent. Counsel specifically about post-traumatic arthritis, infection (higher in high-energy bicondylar injuries), wound breakdown, compartment syndrome, neurovascular injury, stiffness, nonunion, and the likely need for delayed weight-bearing. Setup. Supine on a radiolucent table with a bump under the ipsilateral hip for anterolateral work; a thigh tourniquet is available and used judiciously; the image intensifier must be confirmed (AP, lateral and plateau views obtainable) before draping. A "floating" or prone position facilitates a posteromedial or posterior approach in bicondylar fractures.

The goal is to expose the injured column through an approach matched to the fracture (dictated by the CT and the three-column concept, not by habit), restore the articular surface and the mechanical axis, and build a buttress construct that holds the reduction while it heals. The historical single midline incision over the subcutaneous tibia is associated with high wound-complication rates in high-energy fractures and is generally avoided.

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Choosing the approach — matched to the columns.

Relevant surgical anatomy.

• Articular surface: the lateral plateau is convex and sits slightly higher; the medial plateau is concave, larger and bears more load — medial malreduction is poorly tolerated.
• Posterior slope: the normal posterior tibial slope is roughly 7-10 degrees; loss or excess of slope after fixation alters knee kinematics.
• Gerdy's tubercle: the anterolateral bony prominence and insertion of the iliotibial band — the landmark for the anterolateral approach.
• Lateral meniscus: held peripherally by the coronary (meniscotibial) ligament; a submeniscal arthrotomy lifts it to view the joint without detaching the body.
• Common peroneal nerve: winds around the fibular neck posterolaterally — at risk in posterolateral dissection, medial and high-energy injuries, and prolonged retraction.
• Popliteal artery: tethered at the adductor hiatus and the soleal arch — vulnerable in the knee-dislocation-equivalent medial plateau fracture.
• Pes anserinus and MCL: the superficial MCL and pes overlie the medial approach; the posteromedial interval runs between them and the medial head of gastrocnemius. Fixation and void-filler principles.
• Buttress or antiglide plating: a plate placed to resist the shear of a vertical split fragment is biomechanically essential for split patterns; locking plates add purchase in osteoporotic and metaphyseal bone.
• Raft screws: a row of subchondral screws spans beneath the elevated articular segment to prevent re-depression.
• Void filler: after elevating a depressed segment the metaphyseal void is filled. Calcium phosphate cement resists axial compression better than autograft or allograft and is associated with less subsidence; autograft and allograft remain options.
• Dual plating: in bicondylar fractures, an unstable medial or posteromedial column requires its own plate to prevent varus collapse — a single lateral locking plate is insufficient for a vertical medial fragment.

Rehabilitation. Stable fixation is what permits early movement while the articular reconstruction is protected from load.

Special considerations.

• High-energy bicondylar: closer wound surveillance, later weight-bearing, anticipate stiffness and a higher reoperation rate.
• Osteoporotic Schatzker III: locking and raft constructs and void filler; protect from early loading given poor bone purchase.
• Open fractures or prior ex-fix: heightened infection vigilance; plan soft-tissue cover early if needed.
• Associated meniscal repair: may modify range of motion and weight-bearing per the meniscal protocol. Complications.

Epidemiology and burden. Tibial plateau fractures account for roughly 1 percent of all fractures and around 8 percent of fractures in the elderly, with a recognised bimodal distribution. Young patients sustain high-energy mechanisms (road traffic, falls from height, sport) — more often bicondylar (Schatzker V/VI), comminuted, and accompanied by soft-tissue and neurovascular injury. Older patients sustain low-energy falls onto osteoporotic bone — typically lateral split-depression or pure depression (Schatzker II/III). The proximal tibia is largely subcutaneous, so soft-tissue compromise is a defining problem of the higher-energy injuries and drives the staged-management philosophy. Schatzker classification (plain-film, energy and pattern). The Schatzker system describes six patterns on plain radiographs and broadly tracks injury energy; Types I-III are lower-energy lateral injuries, and IV-VI are higher-energy.

Three-column concept (Luo, CT-based). Luo divided the proximal tibia into lateral, medial and posterior columns on axial CT. A column is involved when a separate articular fragment exists within it. The posterior column — especially the posteromedial corner — is the one plain films miss and a lateral plate cannot control.

• Lateral column — anterolateral approach, lateral plate and raft.
• Medial column — medial or posteromedial approach, antiglide or buttress plate.
• Posterior column — posteromedial (inverted-L) approach, posterior buttress plate; a posterior shear fragment fails under axial load if only a lateral plate is used.
• Clinical value: column-specific fixation gives good functional and radiological outcomes in complex (Schatzker V/VI) fractures and reframes the operative plan around the posterior fragment. Key evidence. Luo (2010) introduced the CT-based three-column concept and reported satisfactory reduction in 28 of 29 complex fractures with no secondary articular depression. Selvaraj (2019) confirmed this in a prospective cohort of 115 two-or-more-column fractures, with excellent or good Modified Rasmussen functional results in about 96 percent. Egol (2005) showed that staged management — spanning external fixation then delayed definitive fixation in 57 high-energy fractures — gave only 5 percent deep infection, supporting the wait-for-the-soft-tissue-envelope principle. Chase (2019) reviewed arthroscopic-assisted reduction for appropriately selected simple split-depression fractures, with comparable or improved outcomes and lower infection, wound and thromboembolism rates, emphasising careful fracture selection. Guidelines, registries and global practice.
• Articular reduction threshold: there is broad international agreement that articular incongruity should be minimised, with most authorities targeting less than 2 mm of stepoff; however, evidence consistently shows that the overall mechanical AXIS and joint STABILITY correlate with long-term function at least as strongly as the residual articular stepoff — alignment is not negotiable.
• Staged management: temporary spanning external fixation followed by delayed definitive fixation for high-energy proximal tibia fractures is a widely adopted standard, supported across trauma centres internationally (Egol et al.); the principle — wait for the soft-tissue envelope — is universal even where local timelines vary.
• Weight-bearing trend: traditional teaching mandated protected weight-bearing for around 8-12 weeks; some contemporary series and protocols explore earlier, graduated loading with stable locked constructs, but practice remains cautious and pattern-dependent worldwide.
• Bone void fillers: calcium phosphate cements are favoured in many systems for their compressive strength and reduced subsidence compared with autograft or allograft; availability and cost drive regional variation in filler choice.
• Post-traumatic arthritis and arthroplasty: registry data (AOANJRR, NJR, AJRR) show that a prior tibial plateau fracture is a recognised indication for subsequent knee arthroplasty, which is technically more demanding and has higher complication rates than primary arthroplasty for osteoarthritis — a key counselling point for younger patients.