This article reviews the Tscherne classification of soft tissue injury, developed in 1982 for both closed (C0–C3) and open (O1–O4) fractures. It examines the evidence for the system's reproducibility, prognostic utility, and role in guiding fixation timing. The classification grades injury severity based on energy imparted to the soft tissue envelope and associated physiologic consequences.
The Tscherne grade you assign in the trauma bay directly determines your fixation strategy. For closed grades 0–1 and open grades 1–2, primary fixation is safe and supported by evidence. For grades C2–C3 and O3–O4, the data are unambiguous: attempting primary ORIF produces osteomyelitis in more than half of patients.
When you see a high-energy tibial plateau or pilon fracture with blistering, extensive contusion, or circumferential swelling, the plan is a spanning external fixator now and return to the OR in 10–14 days when the soft tissue envelope has recovered. This staged approach is why modern pilon series report wound complication rates under 5%.
One practical caveat: do not grade the injury only on arrival. Tscherne reliability is lower at initial evaluation than at 24–72 hours, meaning the true grade often declares itself over the next day or two as the zone of injury evolves. A fracture that looks like a C1 at midnight may be a C3 by morning rounds.
The classification does not account for host factors like diabetes, smoking, or neuropathy, all of which independently worsen wound outcomes. Use the Tscherne grade as a floor for your risk estimate, not a ceiling.
This article reviews the Tscherne classification of soft tissue injury, developed in 1982 for both closed (C0–C3) and open (O1–O4) fractures. It examines the evidence for the system's reproducibility, prognostic utility, and role in guiding fixation timing. The classification grades injury severity based on energy imparted to the soft tissue envelope and associated physiologic consequences.
The Tscherne grade you assign in the trauma bay directly determines your fixation strategy. For closed grades 0–1 and open grades 1–2, primary fixation is safe and supported by evidence. For grades C2–C3 and O3–O4, the data are unambiguous: attempting primary ORIF produces osteomyelitis in more than half of patients.
When you see a high-energy tibial plateau or pilon fracture with blistering, extensive contusion, or circumferential swelling, the plan is a spanning external fixator now and return to the OR in 10–14 days when the soft tissue envelope has recovered. This staged approach is why modern pilon series report wound complication rates under 5%.
One practical caveat: do not grade the injury only on arrival. Tscherne reliability is lower at initial evaluation than at 24–72 hours, meaning the true grade often declares itself over the next day or two as the zone of injury evolves. A fracture that looks like a C1 at midnight may be a C3 by morning rounds.
The classification does not account for host factors like diabetes, smoking, or neuropathy, all of which independently worsen wound outcomes. Use the Tscherne grade as a floor for your risk estimate, not a ceiling.