Apparently, Catherine Zeta Jones uses strawberries to keep her teeth white and bright...
Recently, a reader emailed me asking if I had heard of using strawberries to whiten teeth. "Do mushing strawberries on your teeth really work or should I go the bleaching route? And if I do, is it safe? Do those whitening strips work? Or should I spend the bucks for professional bleaching? Help!" she wrote.
I have heard of the strawberries-for-whitening-teeth trick -- apparently, some Hollywood actors use it -- but I've never tried it. And I don't know much about teeth bleaching -- but I knew the perfect person to ask: Dr. Wilson Kwong. Dr. Kwong is a top cosmetic dentist who has been helping people achieve healthy beautiful smiles for the past 20 years. Based in Vancouver, he shares his expertise in New York, London and California, and has earned an international reputation as a leader in the industry. In other words, this man knows teeth. We chatted recently on what makes a smile beautiful. Here's part of our interview, where I got the scoop on teeth bleaching and side-effects; do-it-yourself-versus-professional treatments; and how white is too white!
BeautyCosmopolite
Teeth bleaching is so popular these days! Is it a big part of your practice?
Dr. Wilson Kwong
Teeth whitening is a big part of my practice because people want it. In my office, it's a non-profit endeavour -- it's so competitive now, there's just not a lot of profit to do it. What we're trying to do is motivate people, through the use of bleaching, to keep their teeth healthy. Appearance is an emotional trigger-point for most people -- if someone is happy with their smile, they are more apt to take care of it.
BC
I've heard that teeth bleaching can lead to problems. How safe is it really, and are there side-effects?
WK
What we call teeth "bleaching" has been in use for about 20 years -- the active ingredient is hydrogen peroxide, not bleach. Hydrogen peroxide breaks down into oxygen and water. Are there free radicals being released? Yes. There are also free radicals in barbecued foods, for example. Overall, the safety of this procedure is pretty good.
The number one side effect is irritation to the tooth, which means sensitivity. That can be controlled through the use of desensitizing agents.
BC
How about compromising the actual tooth enamel?
WK
Science hasn't shown that to occur. Obviously, ill-use and abuse can cause damage, probably more to the soft tissue than the teeth themselves. I had one patient use a whole dentist-office prescribed kit in three days! It was not something that was instructed. Sometimes people go a little overboard in what they feel is 'white' and use too much.
BC
Speaking of, can teeth be too white? I met someone a while back who had such stark-white teeth that they were actually a distraction from her pretty features. I don't think her super-bright level of whiteness could have been a result of bleaching, though -- I'm guessing veneers?
WK
If someone asked for veneers, for example, that were really icy-white, I would counsel them about it. Most patients listen. Together, we take into consideration everything from complexion to personality. That being said, people have different ideas about how they want their teeth to look. I think teeth look really good when the person is comfortable with them. The goal is to create a smile that makes the person feel confident, because a confident smile is what makes a beautiful smile!
BC
Are the drugstore, over-the-counter whitening kits safe and do they work?
WK
Yes, they're very safe. They are weaker than the ones we prescribe in the office. They work better on younger people who still have fairly white teeth and just want some brightening. The effects will last a few months. The over-the-counter kits don't work as well for older people who have more staining.
BC
When would you advise professional teeth-whitening versus a do-it-yourself kit?
WK
It really depends on budget. The office procedure is faster and better, and the results last longer, up to a year. Over time it can actually be less expensive. And you can't really get the same result with drugstore kits. But there is no big difference in safety between the two options.
BC
How can we keep our teeth white naturally?
WK
Teeth age with us, and generally get a little darker due to the micro-fractures we create as we use our teeth that allow staining. I've heard of people using lemon and other acidic foods to naturally bleach their teeth. I have no problems with people trying that if they want to. If it works, great!
BC
Have you heard of whitening your teeth with strawberries? Apparently, the malic acid acts as an astringent to remove the surface discolouration. The suggestion is to mash one strawberry with baking soda and apply for five minutes. How safe is this -- assuming you thoroughly brush your teeth afterward of course!
WK
Acid will corrode and erode teeth and teeth matter -- that's how cavities occur. I'm not really recommending that people use anything acidic because it does break down enamel. That being said, our saliva has a natural buffering action against acid. And thoroughly flossing and brushing your teeth after trying something like this is really important. I wouldn't suggest using this method very often.
BC
Speaking of natural methods to remove stains, what do you think about brushing with baking soda?
WK
What you're trying to do with this is use an abrasive source to physically scratch off any debris. However, microscopically, you might be creating little fractures, which will then enhance staining possibilities. You want the teeth to be as smooth as possible, and to use a non-abrasive toothpaste.
BC
You have a great smile and beautiful teeth -- do you bleach them?
WK
Yes!
So there you go. If anyone has tried any of these whitening methods, I'd love to hear how you felt about the results! Thanks to the reader who asked about a topic that a lot of people are interested in. And many thanks to Dr. Wilson Kwong! You can find out more about Dr. Kwong on his Smiles Are Beautiful website.