Using a mouth guard is important for several reasons, especially in situations where there is a risk of impact to the face or mouth. Here are some key reasons why people use mouthguards:

1. Protection of Teeth: It is designed to absorb and distribute the forces generated by a blow to the face. They act as a barrier between the upper and lower teeth, helping to prevent fractures, chips, and other injuries to the teeth.

2. Prevention of Jaw Injuries: It can reduce the risk of jaw injuries by providing a cushioning effect during impact. They help stabilize the jaw and protect against fractures and dislocations.

3. Soft Tissue Protection: It also protects the soft tissues of the mouth, including the lips, tongue, and cheeks, from cuts, abrasions, and other injuries that can result from contact.

4. Concussion Prevention: While not a primary function, some studies suggest that wearing a properly fitted mouth guard may help reduce the risk of concussions in certain situations by absorbing and dissipating impact forces.

5. Compliance with Sports Regulations: In many contact sports and activities, the use of mouthguards is mandatory. Athletes may be required to wear mouth protection as a part of the rules and regulations set by sports organizations.

6. Facial Fracture Prevention: It can also reduce the risk of facial fractures by providing a protective layer between the teeth and the bones of the face.

7. Customization for Comfort: Custom-fitted mouth guard, in particular, provide a comfortable and secure fit, which encourages regular use. This is important because an ill-fitting or uncomfortable mouthguard is less likely to be used consistently.