Isao Miyoshi, dental technician and leader of the Japan Dent

JAPAN - APRIL 06: Isao Miyoshi, dental technician and leader of the Japan Dentures Recycle Association, poses with a bucket of old dentures bound for recycling, at his office in Saitama, Japan, on Friday, April 6, 2007. Japanese dental technician Isa Miyoshi sees opportunity in the buckets full of old dentures at his office in Saitama. (Photo by Haruyoshi Yamaguchi/Bloomberg via Getty Images)