A fractured bone has a tension side – which tends to move apart due to the distraction forces applied during the action of muscles. According to the tension band principle, the tension side is fixed by using a wire or a plate. Then the distraction forces tend to compress the bone, helping in healing.

Ref: Maheshwari - Orthopedics , p24,25

1. Sequestrum
2. Cambium layer
3. Involucrum
4. Blount’s disease