The triplane fracture is also known as the Marmor-Lynn fracture and typically occurs in adolescents. The term actually refers to three fractures of the tibia: a vertical fracture through the epiphysis, a horizontal fracture through the physis, and an oblique fracture through the metaphysis. Twisting injuries produce this type of fracture.
| A||AP radiograph of the ankle. The horizontal fracture through the lateral tibial physis is apparent as well as the vertical fracture through the epiphysis.|
| B||Lateral radiograph of the ankle. The metaphyseal fracture line is visible within the tibia.|
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