Heather Powell got a big surprise when she took her 4-year-old son for a routine dental checkup — young Eli had several cavities and needed eight crowns on his back teeth.
The Baltimore mom worried about her child undergoing such a complex medical treatment, which the doctor said would require general anesthesia.
"I could not wrap my head around the fact that my kid would have to go through a procedure of this magnitude," Powell said.
Desperate for an alternative, Powell began searching the Internet for other options. She discovered a handful of dentists around the country who use a mixture called silver diamine fluoride to freeze cavities, preventing the...