Final answer:
An avulsion fracture occurs when a piece of bone is torn away from the main bone due to a sudden and strong force. This type of fracture is common in sports injuries and can vary in severity, requiring surgical intervention in some cases.
Step-by-step explanation:
An avulsion fracture occurs when a piece of bone is torn away from the main bone due to a sudden and strong force, often caused by a muscle or tendon pulling away from the bone. This type of fracture is common in sports injuries and can also occur in cases of trauma or accidents. The severity of an avulsion fracture can vary, with some cases requiring surgical intervention.