Tooth decay affects children from all backgrounds, but it’s concentrated among low-income and rural populations, who have the most difficulty accessing and affording dental care. One approach gaining momentum in the United States to extend access to underserved groups is based on an idea that was pioneered in New Zealand 93 years ago, and has been adopted in more than 50 countries - the idea is to train “dental therapists,” who, like dental hygienists, work under the supervision of dentists, but who can also drill teeth and perform non-complex extractions.