1. Fluoride

2. What does fluoride do? What is fluoride? Why is fluoride important? Fluoride is a chemical It helps make teeth stronger It helps to fight decay Without it many people would have holes in their teeth!

3. Where can fluoride be found? It occurs naturally in things like tea, fish bones & even beer! Toothpastes and mouthwashes from supermarkets contain small amounts of fluoride It is also found in milk & tap water!

4. How and when can you use fluoride? Brush your teeth twice a day with a fluoride toothpaste Use a mouthwash too but DO NOT swallow it! RINSE & SPIT!!

5. What does fluoride do? It helps weaker teeth to protect themselves from acid & sugar

6. Session Activities: A super science experiment! Design and colour a poster to encourage people to use a fluoride toothpaste and mouthwash

7. Experiment: You will be investigating fluoride to see if it actually DOES help teeth to be stronger. Instead of real teeth, you will be using boiled eggs! You will test to see if using fluoride prevents acid from attacking the teeth (eggs). What do you think will happen?

8. Equipment: Boiled eggs (1 per person) Fluoride toothpaste (any brand) Empty egg boxes Clear jam jars Vinegar Stopwatches Pencils Observation Sheets Permanent marker pen

9. Setting up the experiment: Day One 1.Put fluoride toothpaste into the egg box where the eggs usually sit. 2.Use a permanent marker to draw a line around the middle of your egg. Write an ‘F’ on the bottom section. 3.Dip the egg into the fluoride, making sure the bottom half is covered by the toothpaste. 4.Leave overnight (24 hours)

10. Completing the experiment: Day Two 5.Remove the egg, rinse with water & dry with a paper towel. 6.Pour some vinegar into the jar so that it will just cover the egg – DO NOT OVERFILL. 7.Put the egg into the jar of vinegar for 2 minutes. Use a stopwatch to measure the time. 8.Remove the egg and observe what has happened.

11. Concluding the experiment: The fluoride treated area of the egg has not broken down as much because it was protected from the acid by the fluoride.

12. Does anyone have any questions…?