What type of fracture is typically caused by an accident or lack of bone mass?

The term that best describes a fracture caused by an accident, especially when referring to circumstances where there may be a lack of bone mass, is associated with the category of an accidental fracture. Accidental fractures result from unforeseen events or trauma that put stress on the bones, leading to a break. This is particularly relevant when considering individuals with reduced bone density, such as those with osteoporosis, as they are more susceptible to fractures from minor falls or accidents.

In contrast, a stress fracture is typically a result of repetitive stress or overuse rather than a singular accident. A simple fracture is a clean break that does not penetrate the skin, while a compound fracture is one where the bone breaks and protrudes through the skin, both of which do not specifically refer to accidents or conditions of low bone mass as the primary cause. Thus, the chosen term encapsulates both the idea of an accidental cause and highlights the influence of bone mass on fracture susceptibility.