Final answer:
An open fracture occurs when the bone punctures the skin and carries a high risk of infection.
Step-by-step explanation:
The fracture described in the question is called an open fracture. An open fracture occurs when the broken bone punctures through the skin. It carries a high risk of infection due to the exposure of the bone to the external environment.
An open fracture can cause serious complications and require immediate medical treatment. In this type of fracture, the bone not only breaks all the way through but also breaks through the soft tissues around it so it protrudes from the skin.