Mobile Clinic Treats 'Mountain Dew Mouth'

They said the company is "continually expanding our offerings of healthier, more nutritious products" and that they "offer a wide range of sugar-free and caffeine-free products." They also said they are working with schools, non-profits and the government to educate people about healthier lifestyles. CLICK HERE to read the second statement.

The dental dilemma in Kentucky is that nearly one out of every two of the state's children are enrolled in Medicaid, but barely a quarter of dentists accept the insurance. So for the Appalachian families on Medicaid, they often have few options when or if they want to see a dentist.

One of Smith's patients, 11-year-old Anthony, hadn't been able to brush his teeth in several weeks because it hurt too much. He says he drank too much Mountain Dew.

"He wasn't able to brush up there around the gum because it was too painful," Smith said. "It's causing the gums to be inflamed."

But after his appointment, Anthony's smile was as good as new. Those smiles are Smith's gifts to the mountains.