Science Fair Projects on Tooth Decay

Science Fair Projects on tooth decay abstract reveals what causes teeth and gums to become diseased.
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Traumatized Teeth

Tasmiha
Age: 16
Illinois, USA


Purpose The purpose of my experiment is to determine the effect of various liquid substances on the decaying of teeth. I basically want to see which type of liquid increases the risk of cavities. By doing this experiment, I will be able to know how to help keep my teeth healthy and promote dental hygiene.

Hypothesis
I believe that the tooth soaked in orange juice will induce the formation of the cavities the fastest because it is the most acidic. The teeth soaked in Pepsi will decay next because it has the most sugar content. Water will then probably take the longest to incite a cavity because there are no preservatives in water, whereas in orange juice and Pepsi there are. Hence, I think orange juice will induce cavities the fastest, and then Pepsi followed by water.

Why not do science fair projects on tooth decay by testing your fellow students teeth? Make a comparison between what Brand name toothpaste best removes bacteria from their teeth?


Experiment and Materials Used

Materials

  1. Nine teeth of the same size
  2. Nine containers of the same size
  3. 3 different kinds of liquids. (I used Pepsi, Orange Juice, Water)
  4. Old toothbrush
  5. Paper and pen
  6. Refrigerator
  7. Measuring Cup
  8. Ruler
  9. Bleach and bowl
  10. Gloves

Procedure
  1. Gather all the materials needed for the experiment.

  2. Take three teeth and soak them in bleach in a bowl for two minutes.

  3. After two minutes passed, with the use of the gloves and a toothbrush clean the teeth.

  4. Sterilize the containers to remove germs that may be present and let them dry.

  5. Next, take the three containers and three teeth and number them. After the containers are numbered, place each tooth in its allotted position.

  6. Later, take a measuring cup and pour in one liquid at time. Make sure the liquids are all the same amount-100 milliliters. After pouring each type of liquid, wash the measuring cup.

  7. Put Pepsi in container #1, orange juice in #2 and water in #3. Then seal the lids so no air can escape and place them in the refrigerator so that it can remain intact.

  8. Repeat steps 4-7 with the remaining two containers and teeth.

  9. Examine the teeth every week with fragile care. Based on the observations, record the data by measuring the size of the teeth and the appearance. Replace the liquids and repeat steps six and seven.

  10. Stop experimenting the teeth when two out of the three teeth start to show signs of major changing and started to decay.

  11. After experimenting is completed, record the observations and calculate the results.

The controls for this experiment would be the same kind of teeth, same size containers, same amount liquids, same temperature and the amount of time each tooth was exposed to air. The variables for this experiment would the usage of different types of liquids.

DATA

Sizes of Tooth in Millimeters

Click on image to enlarge. Image of Science Fair Projects about Traumatized Teeth - data

Week #      Descriptions of Teeth

Week 1

Pepsi- The tooth became light brown. The upper layer and line was vaguely visible.

Orange Juice- The tooth had a slight change in color. There were a few light yellow spots.

Water- There was no change.

Week 2

Pepsi- The tooth became browner. The enamel was completely visible.

Orange Juice- The tooth became more yellow and seemed to shrink.

Water- There was no change.

Week 3

Pepsi- The tooth became a darker brown and seemed to start decaying. There was a brown portion, which was forming upwards.

Orange Juice- The tooth became much smaller. There seemed to be bits, which were eroding.

Water- There was no change.

Week 4

Pepsi- The tooth became very dark. The cavity seemed to get deeper and there were bits, which were eroding.

Orange Juice- The tooth shrunk a great deal. It also became a darker yellow than before.

Water- There was no change.

Week 5

Pepsi- The tooth became a darker brown. More parts of the tooth were eroding.

Orange Juice- The tooth shrunk more. A cavity formed.

Water- There was no change.

Week 6

Pepsi-The tooth became a very dark brown. The tooth eroded a great deal and shrunk tremendously.

Orange Juice- Half of the material seemed to deteriorate. It shrank a lot and became a darker yellow. The cavity got deeper.

Water- There was no change.


Image of Science Fair Projects about Traumatized Teeth - data -sizes of tooth

I didnít find my results to be completely surprising. However, I was astounded to see that the Pepsi would have a greater change than orange juice. The teeth soaked in Pepsi eroded a greater deal than orange juice in the beginning. But later, the teeth that were soaked in orange juice eroded at the same pace as the teeth soaked in Pepsi. Water however had no change at all. It remained two millimeters since the beginning to the end of the experiment.

Conclusion
My hypothesis was partially correct. I thought that the teeth soaked in orange juice would incite a cavity faster than the teeth soaked in Pepsi. However, I was incorrect about that. The teeth that were soaked in Pepsi induced a cavity faster than the teeth in orange juice.

By doing this experiment, I learned a lot. I now know why it is detrimental for us to take in too much caffeine. It causes great harm in various ways- especially to our teeth.

I also learned that orange juice may be good for you, but too much can harm you.

So basically, water is the best beverage that we should take. It doesnít only help to prevent tooth decay, but it also helps other parts of the body. The most challenging part of my experiment was to measure the liquids and record my data every week accurately.

What I would to Differently Next Time
If I were to redo this experiment, I would use more types of liquids such as milk, coffee and different types of sodas. I would also change the temperature and concentrations of the liquids and test the liquids for a longer period of time. I really learned a lot about teeth and I enjoyed doing my experiment.

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