| Horne and Tanzer Classification of Olecranon Fractures | |
| I | Transverse Intraarticular, Proximal 1/3 of Olecranon Articular Surface or Oblique Extraarticular, Involving the tip of the Olecranon |
| II | Oblique or transverse, Involving Middle 1/3 of Greater Sigmoid notch |
| III | Involving Distal 1/3 of the Greater Sigmoid Notch With or without Coronoid Fracture |