1. Teeth Whiteners
By Nathan

2. How Do They Work?
Teeth Whiteners work by removing the stubborn extrinsic stains and the unsightly intrinsic stains that cause your teeth to looked discolored. Opalescence Gels contain an active whitening ingredient (either carbamide peroxide or hydrogen peroxide) that penetrates your enamel to get to discolored molecules.

3. What chemicals are used
Most Tooth whiteners use one of two chemical agents Carbamide peroxide or hydrogen peroxide. When you use it in your mouth the carbamide peroxide breaks down into hydrogen peroxide and urea, with hydrogen peroxide being the active whitening ingredient. The chemicals that are used for teeth whitening are used because they are the safest chemicals for whitening teeth. They will not harm your teeth.

4. What is teeth whitening
Tooth whitening lightens teeth that helps remove stains and discoloration. Tooth whitening is among the most popular cosmetic dental procedures because it can really improve your appearance. Most dentists perform tooth whitening and it is not a one-time procedure.

5. How long does teeth whitening take?
Once your dentist or dental team has started the treatment, you will need to continue the treatment at home or return to your dentist. This means regularly applying the whitening product over two to four weeks, for 30 minutes to an hour at a time. However, there are some new products which can be applied for up to eight hours at a time.

6. Comparison between different brands
Pop Smile teeth whitening kit is a gel substance. The full package it is $ and for a starter package it is $81.71
Aspro Bright Teeth Whitening Kit is a mouth guard that you put in your mouth and you put a light gel cream substance on it. The full Package is $39.95 and for refills it is $13.50.

7. How this product impacts me or relates to my life?
I may in the future use a teeth whitener for whitening my teeth but I will do it with professional help before I do it by myself so I know what I’m doing so I don’t hurt myself.

8. Environmental Issues
It is disposed into garbage and because it is plastic it does not decompose well.

9. Interesting Facts about teeth
On average, you will produce 25,000 quarts of saliva in your lifetime. That’s enough to fill two swimming pools.
Teeth start to form before a baby is born, but won’t become visible until at least 6 months after birth.
Tooth enamel is the hardest substance in your body.
Modern toothpaste has only existed for about 100 years. Older materials for cleaning teeth include charcoal, ashes, chalk, lemon juice, and more

10. Citations www.opalescence.com/en-us/how-does-it-work.aspx
science.howstuffworks.com/innovation/everyday-innovations/tooth-whitening1.html
whitening-safety-and-effectiveness