Participants in contact sports such as football, motocross, BMX, and skateboarding are particularly susceptible to what type of injuries?

The following is the correct term for a "loss of tooth structure due to exposure to acid in the absence of dental biofilm bacteria."

A) Erosion B) Abrasion C) Decay D) Attrition

Which of the following is the best action to take when a person has a spinal column injury that was not caused by sudden acceleration or deceleration?

A. Try to locate the exact area of injury. B. Check the circulation in the hands and feet. C. Call 911. D. Assist the person into a supine position.