Core Concept
"Pilon" = French for pestle (havan eli) — coined by Etienne Destot in 1911
High-energy axial compression drives the tibia into the talus like a pestle
Account for 1–10% of all tibial fractures
Defining challenge: bone comminution + severe soft tissue compromise — both must be addressed
Classification
Rüedi-Allgöwer
Type | Description |
|---|---|
I | Non-displaced cleavage fracture |
II | Displaced, minimal comminution |
III | Displaced + significant comminution |
AO/OTA 43
Type | Description |
|---|---|
43-A | Extra-articular |
43-B | Partial articular |
43-C | Complete articular (C1→C3 increasing comminution) |
CT is mandatory — plain films underestimate comminution and fragment displacement. Axial CT 1 cm above the ankle joint guides approach selection.
The Staged Protocol — Standard of Care
Staged protocol significantly reduces complication rates versus immediate ORIF through swollen, compromised soft tissues.
Stage 1 (Day 0–1):
Spanning external fixator → restore length, alignment, rotation
Open fractures: irrigation + debridement at same setting
Fibula fixation if it aids alignment
Stage 2 (Day 7–14):
Wait for: skin wrinkling, decreased swelling, wrinkle sign
Definitive ORIF or MIPO once soft tissue biology permits
Early ORIF (<24 h) acceptable only in Tscherne 1–2 closed fractures in ideal settings
Approach Selection — Four-Column Framework
Distal tibial plafond has 4 columns: anterior, medial, lateral (posterolateral), posterior (posteromedial). Match the approach to the dominant fracture column on CT.
Approach | Indication |
|---|---|
Anterolateral | Anterolateral column fragments; interval between EDL and EHL — protect superficial peroneal nerve |
Anteromedial | Medial column fragments |
Posterolateral | Posterior column — often combined with fibula fixation |
Posteromedial | Posterior + medial columns; tarsal tunnel involvement — most versatile posterior approach |
Pearl: Posteromedial approach first opens the tarsal tunnel to protect neurovascular structures before reducing posterior + medial malleolar fragments.
Outcomes Data
Treatment | Key Outcome |
|---|---|
Staged ORIF | Deep infection ~9% even with soft tissue protocol |
MIPO (43-B/C) | AOFAS 85.2, union 93.9%, complication 9.1% |
Circular Ex-Fix | Union 21 weeks, malunion 12.4%, pin infection 54% |
Open # ORIF vs Ex-Fix | AOFAS comparable (p=0.682); deep infection ORIF 13.8% |
Primary arthrodesis (C3) | Consider in severely comminuted C3 — high ORIF revision rates |
Pearls & Pitfalls
Skin wrinkling = green light. Definitive fixation before the wrinkle sign = unacceptably high wound complication risk.
Don't ignore the posterior column. Posterior pilon variant fractures (PPVF) mimic trimalleolar fractures but are more severe — higher articular impaction, higher incongruency rate. CT confirms.
Fibula first — but not always. Fibula fixation restores lateral column length and aids tibial reduction in most cases, but it is not mandatory in all patterns.
In severely comminuted C3 pilon fractures, primary ankle arthrodesis should be considered as a viable alternative to staged ORIF.
MIPO + staged = best of both worlds. Pre-contoured locking plates via minimally invasive incisions after initial ex-fix: good AOFAS, acceptable complication rates, minimizes soft tissue stripping.
Ideal Surgical Candidate Profile
Soft tissue biology resolved · Wrinkle sign present · CT-based preoperative planning complete · Staged protocol completed if initial swelling precluded early fixation