AO Foundation EducationMüller AO Classification of Fractures— Long BonesThis leaflet is designed to provide an introduction to the classification of long-bone fractures.r人13-C complete articular fracture13-C1 articular simple, metaphyseal simple13-C2 articular simple, metaphyseal multifragmentary 1313-A extraarticular fracture 13-A1 apophyseal avulsion13-A2 metaphyseal simple13-A3 metaphyseal multifragmentary13-B partial articular fracture 13-B1 sagittal lateral condyle13-B2 sagittal medial condyle13-B3 coronal1 Humerus12 diaphyseal 12-A213 distal 13-A113-A3 13-B213-B3 13-C1 13-C312-A simple fracture 12-A1 spiral12-A2 oblique (>_ 30°)12-C complex fracture 12-C1 spiral12-C2 segmental12-C3 irregularYt11-A extraarticular unifocal fracture 11-A1 tuberosity11-A2 impacted metaphyseal11-B extraarticular bifocal fracture 11-B1 with metaphyseal impaction11-C articular fracture11-C1 with slight displacement11-C2 impacted with marked displacement 11-C3 dislocated12-B wedge fracture 12-B1 spiral wedge4j21-C articular fracture of both bones21-C1 simple21-C2 one artic. simple, other artic. multifragmentary 221-B articular fracture21-B1 ulna fractured, radius intact21-B2 radius fractured, ulna intact21-B3 one bone articular fracture, other extraarticular21-A extraarticular fracture21-A1 ulna fractured, radius intact 21-A2 radius fractured, ulna intact 21-A3 both bonesmmWw23-C complete articular fracture of radius 23-C1 arti23-C2 articular simple, metaphyseal multifragmentary 2323-B partial articular fracture of radius 23-B1 sagittal23-B2 coronal, dorsal rim23-B3 coronal, palmar rim23-A extraarticular fracture23-A1 ulna fractured, radius intact 23-A2 radius, simple and impacted 23-A3 radius, multifragmentary2 Radius/ulna21 proximal 21-A1 21-A221-A3 21-B2 21-B3 21-C3C- - .22 diaphyse...
