Olecranon fractures in the adult are a common upper extremity injury. The fractures can be classified into three groups based on the lateral radiograph. Undisplaced fractures can be treated nonoperatively. Type I fractures can be treated by excision or interfragmentary compression with screws. Type II fractures are best treated by tension band wiring. Type III fractures, because of their configuration, are best treated by interfragmentary compression and a neutralization plate.
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