A Nanosilver Bullet against Tooth Decay?

We’re often overwhelmed by choice. Just think of your local supermarket and its aisles brimming with so many dozens of kinds of breakfast cereal, soup, crackers, cookies and other products. Most of the time when we do our shopping, we don’t pay attention to the plentitude. When we do become aware of it, it can be truly mind-boggling.

Of course, the matter of too much choice isn’t restricted to groceries but a whole array of consumer goods, from cars to computers, TVs to toothpaste. Anymore, it seems any innovation is glommed onto as quickly as possible to create new products that can stand out amidst the glut of old, familiar ones. And we all know newer is better, right?

Not necessarily. “New” isn’t always “improved.” And sometimes we rush to embrace new things without asking whether they’re really an improvement or what their potential drawbacks might be.

One new technology in dental care products that we may want to ask these questions about is the use of nanosilver in toothpastes.

The first question, though, is why nanosilver – very tiny bits of silver used to coat an item or be suspended in it? The answer is simple: it’s been shown to have antibacterial qualities. So considering that pathogenic microbes – “bad” oral bacteria – play a role in tooth decay and gum disease, it would seem to make good sense to use nanosilver to kill those “bad germs.”

But nanosilver – like other nanomaterials – has other qualities, as well. As noted in an article posted at The Wealthy Dentist,

Nanoparticles behave quite differently from their regular-sized counterparts. Their comparatively large surface area increases their biological activity. Moreover, the particles themselves are much smaller than cells. Nanoparticles can be absorbed through the skin, eyes or nose. They can even cross the blood-brain barrier.

For example, although titanium dioxide is biologically inert, nano-titanium dioxide particles have been shown to damage DNA. Nano-titanium dioxide is estimated to be in over 10,000 consumer products today, including cosmetics, medicines and toothpaste.

Another major nanotech invention, carbon nanotubes have amazing strength. Unfortunately, they can also cause more lung damage than asbestos.

What biological effects might nanosilver have? We don’t really know yet, though some animal studies – such as this one – have shown potential for harm. Much research remains to be done – not just on nanosilver but the full array of nanomaterials.

And what do dentists think about all this? According to a Wealthy Dentist survey, only 6% would recommend it, while 26% would recommend against it and 69% say they don’t know enough about it to say. But caution does seem to be called for. As one Texas dentist put it, “There is not enough scientific evidence that it is more efficacious than other more proven products, and there’s some disturbing evidence that it might do harm.”

Besides, in the world of too much choice, there are already plenty of effective, nontoxic toothpastes available – including ones that contain no fluoride or sodium lauryl sulfate.

What’s more, toothpaste itself plays a minor role in fighting tooth decay, serving mainly as an abrasive to help break up the biofilm (plaque) that forms on your teeth between cleanings. More important is how you brush, as well as whether or not you floss.


Image credits: 1) Toothpastes via Coming Home, 2) Nanosilver via NanotechnologyNow


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3 Comments

Filed under Dentistry, Oral Hygiene

3 responses to “A Nanosilver Bullet against Tooth Decay?

  1. I really do not know about this. It does make the skeptical side of me come to light. I always thought that metals like these should stay out of your mouth. I am however interested to know of it’s full affect. I will consult with my dentist to see what he thinks. Thanks for the article!

  2. i didn’t know that silver has antibacterial effects. Thanks for supplying that info.

  3. Pingback: Does It Matter What Kind of Toothpaste You Choose? » Dentists in LA