Which of the following best describes a compound fracture?

A compound fracture is specifically defined as a type of fracture in which the bone breaks and punctures through the skin. This breaks the protective barrier of the skin, creating an open wound that can lead to an increased risk of infection and complications. The term "compound" indicates that there is an exposure to the external environment, which is a critical distinction from other types of fractures, such as simple fractures, where the skin remains intact.

In addition to the physical characteristics of a compound fracture, the potential for complications necessitates a more rigorous medical intervention compared to other fractures. Proper treatment often involves not only stabilizing the fracture but also addressing the open wound to prevent infection.

The other options describe different concepts that do not capture the essence of a compound fracture accurately. For example, a fracture that does not break the skin is a simple fracture, while a partial fracture that heals quickly does not reflect the severity of a compound fracture. Similarly, a fracture requiring no intervention does not align with the treatment needs typically associated with compound fractures. Therefore, the choice that indicates a fracture where the bone has pierced through the skin accurately identifies the critical characteristics of a compound fracture.