Program includes hands-on community clinic, and opportunities at local dental practices Cradling a tiny, hollowed-out acrylic dental crown in her palm, McKenzie Scott proudly holds up her handiwork. "It's number 19, a first molar," the student said as if making an introduction. In dental care, every tooth (and corresponding crown) has an assigned number — much like a street address. This one lives on the lower left, two-thirds back, in a wider neighborhood of 32 teeth.