AO classification
Pronunciation: ay-oh
Also written as: AO — Arbeitsgemeinschaft für Osteosynthesefragen
Comprehensive fracture classification system developed by the AO Foundation for systematic categorization of fractures.
Full Definition
The AO (Arbeitsgemeinschaft für Osteosynthesefragen) classification is an internationally recognized system for categorizing fractures based on anatomical location, fracture pattern complexity, and soft tissue involvement. The system uses alphanumeric codes where numbers indicate bone segments and letters denote fracture types and groups. For example, proximal femur fractures are coded as 31, with subcategories A, B, and C indicating increasing complexity. This standardized classification aids in treatment planning, surgical approach selection, prognostic assessment, and research comparisons across institutions.
Usage
Usage note: Often written as 'AO/OTA classification' to acknowledge both organizations. Ensure consistent formatting of alphanumeric codes (e.g., 32-B2, not 32B2).
In Context
- "The fracture was classified as AO 32-B2 according to the standardized system." — Radiology report
- "Patient outcomes were analyzed by AO classification groups for statistical comparison." — Research manuscript