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Mr. Carson and Mrs. Dumond are conducting an experiment on Crest Whitestrips. They claim that your teeth are visibly whiter after just three days.

The website for Crest Whitestrips can be found at: http://www.whitestrips.com/whitestrips-home.jsp

Some information about their product:
 * You use white strips on your top and bottom teeth two times a day for thirty minutes each.
 * You can use the white strips for 14 days.
 * The whitestrips use peroxide to whiten your teeth.
 * You can use them every six month to keep teeth white.


 * __Problem__**

The question I would like to answer is: Do Crest Whitestrips actually make your teeth whiter after 3 days?


 * __Information__**

Are tray-based teeth whitening systems utilizing a 10% carbamide peroxide whitener safe to use?
While it is important to know that a teeth whitening system can be effective, it is clearly much more important to know that it is safe to use. At-home tray-based [|teeth whitening] ([|teeth bleaching]) methodology using a 10% carbamide peroxide tooth whitener was first introduced to the [|dental] community in a paper published in 1989. Since that time numerous of dental studies have investigated safety considerations that might be associated with the use of this technique. This research has led to the general consensus that while this technique is not without [|side effects], dentist-dispensed at-home tray-based teeth whitening systems utilizing a 10% carbamide peroxide whitener are safe to use. And, in fact, this type of whitening system has gained wide acceptance by the dental community as a whole. The overwhelming majority of dentists in this country do offer tray teeth whitening systems to their patients because they know it has been time tested to be both safe and effective. 


 * __Hypothesis__**

After reviewing all the information on the Crest whitestrip webpage and doing some research about the active ingredient in Crest whitestrips, my hypothesis would be that Crest whitestrips actually do work and make your teeth whiter due to their active ingredient Peroxide.

I also took a poll of 5 people that have used Whitestrips and they all said that they worked for them.

Here is an online poll: Click Here to take survey

Also, some people talk about the Crest Whitestrips: http://answers.yahoo.com/question/index?qid=20070319044727AAeH36Y


 * __Experiment__**

To conduct my experiment I plan to do the following....

1. Find two people that are roughly the same age, and same teeth color. 2. Take pictures of both people smiling (showing teeth). 3. Have one person continue to eat, drink, and brush the way they have been for 14 days. 4. The other individual will use the crest whitestrips for 14 days. 5. After 14 days, take another picture of both individuals. 6. Compare the teeth for color differences.


 * __Analyze__**

After running the experiment, there was a significant change in color between the two individuals. The person that used the Whitestrips had whiter teeth than the person that did not use Whitestrips.


 * __Conclusion__**

Crest Whitestrips really work! The results indicate that they are successful. In order to make sure that this experiment was valid, I would have to try the experiment on several more people to see if the same results are achieved.