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Bacteria and toothpasteFeatured science projectScience project video

Observation

The results show that all the petri dishes with bacteria samples taken after brushing with toothpaste, had a smaller  amount of bacteria growth. The petri dish with “Colgate – after” toothpaste had the smallest sized bacteria colony.

Condition

Size of bacteria growth after 5 days (mm)

Colgate

Sensodyne

Aquafresh

Crest

Before brushing

48

53

51

46

After brushing

13

24

28

21

 

The chart below represents the results of our science project.

bacteria in teeth science fair project
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Complexity level:
8
Project cost ($):
20
Time required:
1 hour to prepare, 4 days for science fair project
Material availability:
Easily found
Safety concerns:

The bacteria should be destroyed before being disposed of. Pour some bleach into the petri dish to kill all the bacteria before disposal.