Modified Neer Classification (Distal Clavicle Fractures)
Derives the modified Neer type (I, IIA, IIB, III, IV or V) of a distal-third clavicle fracture from the radiograph.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Fracture pattern
- A single main fracture line
- Location against the coracoclavicular ligaments
- Between the conoid and trapezoid…
Result: Modified Neer type IIB: between the conoid and trapezoid ligaments, with the conoid torn and the trapezoid still on the lateral fragment; described as inherently unstable.
The tool opens with these values already filled in. Replace them with your own.
What you enter
- Fracture pattern
- Location against the coracoclavicular ligaments
- Acromioclavicular joint
- Skeletal maturity
How this is calculated
Citation
Neer CS II. Fractures of the distal third of the clavicle. Clin Orthop Relat Res. 1968;58:43-50. Stenson J, Baker W. Classifications in Brief: the modified Neer classification for distal-third clavicle fractures. Clin Orthop Relat Res. 2021;479(1):205-209. Read the sources: Neer 1968 ↗, Stenson 2021 ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.