Tech Today: Semiconductor Research Leads to Revolution in Dental Care  – NASA

Mar 5, 2024

Tech Today: Semiconductor Research Leads to Revolution in Dental Care  – NASA

Toothpaste based on the mineral hydroxyapatite, popular across Asia and much of Europe today, is finding its first foothold in the U.S. But the idea behind this alternative to fluoride-based toothpaste was conceived here in a short-lived NASA field center more than 50 years ago. 

While working at NASA’s Electronics Research Center – active in Cambridge, Massachusetts, from 1964 to 1970 – Senior scientist Bernard Rubin discovered semiconductor crystals for electronics grew best in a silica gel. He quickly realized this gel diffusion system mimicked how hydroxyapatite crystals grow in bones and teeth, giving them their hardness. Building on this observation, he and a colleague patented a method for repairing a tooth by growing hydroxyapatite crystals on the tooth’s surface

A few years later, a young Japanese businessman named Shuji Sakuma, having just founded Sangi Co. Ltd. in Tokyo, obtained the patented research and set about turning it into a product with the help of dental professionals. Lessons learned from Rubin’s patented methodology inspired the company’s Apadent and Apagard toothpaste lines in the early to mid-1980s. Japan and many other governments now recognize hydroxyapatite as an anticavity agent, and studies have found it to have other benefits, like improving whiteness and reducing sensitivity. 

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Jul 10, 2025

NASA’s Roman Space Telescope Team Installs Observatory’s Solar Panels – NASA

On June 14 and 16, technicians installed solar panels onto NASA’s Nancy Grace Roman Space Telescope, one of the final steps in assembling the observatory. Collectively called the Solar Array Sun Shield, these panels will power and shade the observatory, enabling all the mission’s observations and helping keep the instruments cool. “At this point, the […]

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