Which of the following is the primary purpose of a mouth guard?

The primary purpose of a mouth guard is to prevent dental injuries. Mouth guards are specifically designed to cushion the teeth and reduce the risk of damage during contact sports or activities where there is a potential for oral trauma. They provide a barrier that can absorb the impact from blows to the face, which in turn helps protect the teeth from fractures, dislocations, or avulsions. Additionally, mouth guards can help prevent injuries to the soft tissues of the mouth, such as the gums and lips.

While mouth guards can provide some level of protection against jaw fractures, their main role centers on safeguarding the teeth. They do not typically enhance breathing or improve athletic performance directly, although they can contribute to a greater sense of safety and confidence in athletes, allowing them to focus on their performance. Thus, the key functional role of a mouth guard lies in its ability to prevent dental injuries effectively.