For this science fair project the independent

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1. For this science fair project, the independent variable is the type of beverage used to stain the teeth. The dependent variable is the degree of staining on the tooth. This is determined by comparing the stains on the teeth after removing them from the beverages. The constants (control variables) are the temperature of the beverages, the whiteness of the teeth used and time the teeth are left in the cup. 2. Brush the 5 loose teeth with the toothbrush and toothpaste until all the teeth reach a similar color. 3. Fill 5 cups with coffee, tea, grape juice, red wine and Coca-Cola. Drop a tooth into each cup and set aside for 3 minutes. Then, remove the teeth, wipe dry, and place on a sheet of paper. Label each tooth for the beverage it was placed in. 4. Compare the discoloration and staining on each tooth. Rank the teeth according the degree of staining, with 1 being the most discolored and 5 being the last discolored. Observation The results show that the grape juice caused the most staining, while the red wine had the least staining effect on the teeth. Beverage Coffee Tea Grape juice Red wine Coca Cola Tooth stain rating 3 4 1 5 2 Conclusion The hypothesis that coffee will leave the most stains on our teeth has not been proven to be true; instead, grape juice caused the most discoloration.
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Having a beautiful smile and white teeth is important to a lot of people. Many people visit dentists to obtain cosmetic whitening for discolored teeth. There are also a lot of teeth whitening products available in the market. Having stained teeth may be embarrassing to some and may affect their self- confidence; hence, it may be advisable to drink in moderation beverages known to stain teeth. Also consider The science fair project may be repeated using different types of food like soy sauce, curry, black pepper sauce or chili sauce. The experiment may also be done to compare stains left on fabric by food or beverages. References Teeth stains and discoloration -
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  • Summer '15
  • curries. Beverages

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