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Jan 9, 2019, 5:00 am179 pts
Earth911
Braces, expanders, headgear, retainers, and eventually, dentures. Over a lifetime, that’s lots of metal, plastic, and even precious metals and hazardous materials in our mouths. Except for the occasional broken retainer, most of our dental appliances are removed at the clinic. Where do they all go? Hazardous…
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