<unk>  classification The<unk>  is a system for classifying bone<unk>  initially published in 1987 by the<unk>  Foundation as a method of categorizing injuries according to therognosis of the patient's anatomical and functional outcome. "AO" is an initialism for the German "Arbeitsgemeinschaft für Osteosynthesefragen", the predecessor of the<unk>  Foundation. It is one of the few complete<unk> classification systems to remain in use today after validation.
Müller AO Classification of fractures
Gustilo open fracture classification
Classification of distal radius fractures
Hip prosthesis zones
Rockall score
Ottawa knee rules
Ottawa ankle rules
Gartland & Werley classification