Outcome validation of the AO/OTA classification system Conclusions Ctype fractures had a significantly worse functional performance and impairment compared with Btype fractures, but Btype fractures were not statistically different from Atype fractures MF Swiontkowski et al 00 AO Classification 0 05 1 15 2 25 3 35 4 45 Impairment ROM Chapter 62 AO/ASIF Fracture Classification Fig 621 AO/ASIF fracture classification Proximal Humerus Fig 622 AO/ASIF fracture classification proximal humerus Humeral Shaft Fig 623 AO/ASIF fracture classification humeralProximal humerus fractures (PHFs) are common, accounting for Neer classification on 3D CT images are mixed24,25,27 In an attempt to improve on the Neer classification, multiple other classification systems have been published The AO group described a more detailed classification system in 1990 with more fracture configurations than Neer's
6 2 1 Humerus Proximal Musculoskeletal Key
