Schenck Classification (Knee Dislocation)
Schenck anatomic classification of knee dislocations: maps the torn ligaments to a KD grade.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- ACL torn
- Yes
- PCL torn
- Yes
- Lateral side torn
- Yes
- Neurologic (e.g. peroneal) injury — appends the N modifier
- Yes
Result: Schenck KD-IIIL-N
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Grades
- KD-I one cruciate; KD-II both cruciates, collaterals intact; KD-III both + one collateral (IIIM medial / IIIL lateral); KD-IV both + both collaterals; KD-V dislocation with a periarticular fracture.
- Modifiers
- a "C" suffix marks arterial (popliteal) injury, "N" neurologic (often peroneal), e.g. KD-IIIL-C-N. The grade is inferred from the entered structures; the Stannard KD-V subgrade is not computed.
What you enter
- ACL torn
- PCL torn
- Medial side torn (MCL / posteromedial corner)
- Lateral side torn (LCL / posterolateral corner)
- Periarticular fracture present (makes it KD-V)
- Arterial (popliteal) injury — appends the C modifier
- Neurologic (e.g. peroneal) injury — appends the N modifier
How this is calculated
Schenck RC Jr. The dislocated knee. Instr Course Lect. 1994;43:127-136. (KD-V and C/N modifiers: Wascher DC, et al. 1997.) Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.