We think that if we use Colgate, Colgate will have the advantage of whitening our teeth because most of them have whitening strips that can clean and whiten simultaneously. Sensodyne is excellent as well because it has fluoride for sensitivity and whiteness.

The main ingredient in Crest Pro-Health Gum and Sensitivty is fluoride ion .Those stop tooth decay.Colgate MaxFresh with Mini-Breath Strips has 0.24% Soduim Fluoride .That ingredient prevents tooth decay. The main ingredients in Sensodyne Whitening Rapid Relief and long lasting protection are Stannous Fluoride. It sticks on the surface of your teeth and protects your teeth from  erosive acids.The Glycerin PEG-8 and pentasodium Triphosphate keep the toothpaste moist and hydrated in the tube.

Sometimes, the sensitivity will worsen in Crest Pro-Health Gum and Sensitivity.

Based only by our infomation,Crest whitens too much, Colgate is only good for people without toothaste allergies and Sensodyne will always have side affcts. No toothpaste is the best, but if 34% of Crest, 10% of Sensodyne, and 56% of Colgate, maybe the cons will balance and the pros wil get better.

The inavtive ingredients in Sensodyne Repair and Protect Deep Repair are Clycerin, PEG 8, Hydrated Silica, Cocamidropropyl Betaine, Sodium Methyl Cocoyl Taurate, Aroma, Titanium Dioxide, Carbomer and Sodium Saccharin. In Colgate MaxFresh with Mini-Breath Strips, it is Sorbitol, Water, Hydrated Silica, PEG-12, Sodium Lauryl Sulfate, Flavor, Cellulose Gum, Tetrasodium Pyrophosphate, Cocamidopropyl Betaine, Sodium Saccharin, Hydroxypropyl Methylcellulose, Blue 1, Titanium Dioxide and Yellow 5. Im Crest Pro-Health Gum and Sensitvity, the inactive ingredeints are water, sorbitol, hydrated silica, sodium lauryl sulfate, carrageenan, sodium gluconate, flavor, stannous chloride, xanthan gum, cocamidopropyl betaine, zinc citrate, sodium hydroxide, sodium saccharin, sucralose and titanium dioxide.

Independent: Toothpaste such as Crest, Colgate and Sensodyne

Dependent: The cleanliness of the teeth models after getting dirty and cleaned with toothpaste

Controlled: The dirtiness on the teeth models

1. We got the tooth models and stained them with 100% Colombian Coffee

2. Once the coffee was dry and stained, we crushed some Cadbury and pushed the chocolate into tiny spaces

3. Lastly, the candy - Black licorice - was pulled and put in the morals of the teeth models

4. We brushed the teeth

We observed that the strength of brushing impacts the cleaniness of the teeth.If we brushed too light it might not clean well but if brushed too hard it might clean too much.We brushed with the same speed and strength so all the teeth were not differently impacted.We observed that Crest did not clean that well because it was not strong.We also observed that Colgate 

Our hypothesis was correct, Colgate cleaned the best. On the other hand, Sensodyne cleaned the second best. Sensodyne needs lots of toothpaste to clean. If people want to buy toothpaste to have radiant teeth, they can get Colgate Max Fresh with Mini-Breath strips.

With our experiment results, we will be recommending the best toothpaste so everybody can have white and fresh teeth.

• https://shop.colgate.com/products/colgate-max-fresh-toothpaste-with-mini-breath-strips-2-pack
• https://ca.crest.com/en-ca/oral-care-tips/teeth-sensitivity/new-gum-sensitivity-toothpaste
• google.com
• https://www.sensodyne.com/en-gb/about-sensodyne/ingredients/#:~:text=Novamin,helps%20project%20them%20from%20 pain.&text=Daily%20repair%20 for%20 sensitive%20 teeth%20with%20 twice%20daily%20 brushing.

We give a million thanks to our science teacher,Ms.T for helping us whenever we got troubles. We also give thanks to our moms,Mawardi and Safae for helping and giving us support through feedback and love.❤