Lockport Union-Sun & Journal Online

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June 24, 2014

New dental tool could mean the end of fillings as we know them

There may come a time in the near future when fillings for minor cavities are a thing of the past. Researchers at King's College London are developing a procedure that uses low-frequency electrical currents to help teeth "self-heal" lesions, or cavities, without drilling.

The technology, called "electrically accelerated and enhanced remineralization," could put an end to fillings for early-stage lesions and moderate tooth decay. And eventually it could lead to new treatments for more-advanced decay.

Sounds good, right? There's even better news: This technology could make it to dentists' offices in Britain within three years.

By the time a dentist looks at an X-ray and identifies a cavity, he or she is seeing a tooth after it has lost minerals in the enamel and has started to decay.

Teeth can repair themselves by replacing those minerals with ones found in saliva or fluoride through a natural "remineralization" process. Researchers have been trying to figure out how to enhance that process by making it faster and allowing it to work more deeply in the tooth.

"We in the dental research field have known about remineralization for some time," King's College London Professor Nigel Pitts, a dentist, said in an interview. "People were talking about remineralization in the 1980s, but it's been hard to achieve a viable way that will remineralize established, large lesions in depth."

Pitts said his team's eureka moment came when it began focusing on preparing the tooth by minimizing such barriers to the remineralization process as saliva and tissue. The next step involves using electrical currents to help drive minerals into the tooth.

In theory, a dentist would place on the tooth what Pitts calls a "healing hand piece" that emits an imperceptible electric current that drives minerals back into the tooth.

The process would be painless and would cost about as much as or less than a traditional filling, and it would take about as much time, Pitts said.

"Using the electrical method, we can achieve remineralization that would have taken weeks and we can do it an order of magnitude faster and better," he said.

The World Health Organization estimates that 60 to 90 percent of schoolchildren and nearly 100 percent of adults worldwide have dental cavities.

Now it appears that technology might be close to creating pain-free, effective cavity solutions that don't discourage people from coming back to the dentist for serious problems such as gum disease.

"The procedure that's involved in cutting a cavity and giving an injection is in some ways really uncomfortable. For some patients it's a real phobia," Pitts said. "When patients are more relaxed, they'll come for monitoring."

"Dentistry is changing, and quite a lot of what we're doing is about health and well-being, and we need to control the dental decay as much as we can," he added.

Pitts and his partner, Christopher Longbottom, formed a company called Reminova to raise money and run patient trials of the technology in partnership with King's College. Academic research supporting the validity of the remineralization technology is expected to be published in industry journals in coming months.

The pair is aiming to have the devices in dentists' offices - beginning in Britain - within three years.

Pitts acknowledged that the regulatory environment for medical treatments in the United States is a little different. But he and his team have been working with international dentistry organizations throughout the process of developing the technology.



 

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