NASA NTRS · 20020087639
Invisible Braces
Abstract
Ceradyne, Inc., and 3M Unitek were assisted in the development of Ceramic braces by NIAC/USC. The braces are marketed by Unitek/3M, and are made from translucent polycrystalline alumina (TPA). They are designed for each tooth, connected by a thin metal wire, are strong, aesthetically appealing and as effective clinically as plastic or metal appliances.
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1989-01-01. Invisible Braces. https://ntrs.nasa.gov/citations/20020087639
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