Avulsion fractures occur where a ligament or tendon attaches to the bone. Upon injury, the tissue pulls on the bone, causing a crack or fracture. These types of fractures are common in tackle sports such as football and rugby. Repetitive motion can also lead to a higher risk of avulsion fractures, as it may stress the tendons and ligaments, putting more force on them and pulling on the bone. They're more common in children and teens than adults, as tendons and ligaments tend to attach to the weaker growth plates of the bone. Most avulsion fractures are closed fractures.
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