Experimental School of University of Macedonia

By the following students: Kaouni Anna,Miliadou Athanasia,Gavridis Dimitris, Zachariadis

Simos,Vakouftsis Dimitris,Christoforidou Athina,Psounou Evaggelia,

Taousiani Georgia , Vareljis George and Koronidis Dimitris

Supervisor teacher: Georgolios Nikolaos, Chemist

Translated in English by: Anna Kaouni and Athanasia Miliadou

People tend to have a more healthier life.

So, daily needs adjust to these models.

As the teeth cleaning is a daily need, more scientists research toothpastes which have simple and natural ingredients.

The toothpaste came from Egypt and consisted of powdered pumice and vinegar.

Then toothpaste

was changed by Greeks and

Romans.

In 19th century toothpaste

started to have a standard form. It was

usually consisted of

chalk, pulverized

brick and salt.

In1892, Dr Washington

Sheffield was the first who

put the toothpaste into

a tube.

Glycerin

Artificial sweeteners

Fluorine

Titanium oxide

First, we preferred

recipes which have simple and cheap ingredients.

After experiments

we ended up to two

recipes, based on

baking soda.

Baking soda acts as

whitening, whereas it creates an

alkaline environment,

which is preferable.

The acidity

The whitening

power Investigated two basic properties of homemade

toothpaste.

Main Ingredients: Also, we added:

7gr baking soda 1ml orange flavour

3gr salt Little clove

4ml glycerin -

1,5ml water -

The final result, in which we ended up, it

was a mixture with sandy

texture.

The add of orange flavour

made our mixture liquid.

In a purpose to improve our

product we added some baking soda.

1st recipe

Baking Soda

Salt

Glycerin

Water

45,18% baking soda

16,72% salt

29,73% glycerin

8,36% water

Main ingredients: Also, we added:

20 gr baking soda 2,5ml food coloring

9 ml glycerine A little citric acid (xino), which

lowers the pH.

1-2 gr Cyamopsis

tetragonolobus Little clover

In order to discern the whitening power:

•We choose to use white eggs' shells because the composition of eggs’ shells looks like this on our teeth.

So we boiled

white eggs

into the water,

in which we

put different

foods, such as

black tea,

onions,

cabbage etc.

And here is the result…

• We separated the eggs in two parts with a black marker. First

• In the one side we brush with our homemade toothpaste and in the other side with the commercial one.

Then

• We noticed that the homemade toothpaste has a better whitening power. Finally

The acidity (pH) of the toothpaste

was measured with small electronic

pHmeters or pH-paper

First the homemade toothpaste’s and after the commercial’s

one.

Toothpastes pH measured

with a pH-

meter

pH

measured

with pH-

paper

Homemade 9,4 9

Commercial 7,2 7

Toothpastes pH measured

with a pH-

meter

pH

measured

with pH-

paper

Homemade 7,5 8

Commercial 7,2 7

The most successful recipe was the second one,

because we noticed that it’s pH looks like the

commercial toothpaste’s pH.

Content of materials in amounts% w/w:

60,6% baking soda,

6,3% Cyamopsis tetragonolobus,

27,3% glycerin

and 6% food coloring.

2nd recipe

Baking Soda

Cyamopsis

tetragonolobus

Glycerin

Food Coloring

We warehoused our toothpastes into airtight jars and we noticed that they can stay invariat for a long time in the frigde.

Finally

In the homemade toothpaste the

whitening power was better,the reason why this happen is the fine granules.

The homemade toothpaste’s

pH is approximately

8.

Slightly basic (alkaline)

environment…

…is needed to neutralize the acidity

produced by the transformation of the sugars to acids into

the mouth.

Cheap and healthy ingredients.

Without chemicals which focus on the appearance of the product.

It doesn’t look attractive.

It doesn’t have creamy texture.

Deficiency of fluoride.

Do you think it’s time

to use the homemade

toothpaste instead of

the commercial one?

By the following students:

Kaouni Anna,

Miliadou Athanasia,

Gavridis Dimitris,

Zachariadis Simos,

Vakouftsis Dimitris,

Christoforidou Athina,

Psonou Evagelia,

Tausani Geogia ,

Vareljis George

Koronidis Dimitris

Supervisor teacher:

Georgolios Nikolaos, Chemical

Translated by:

Kaouni Anna

Athanasia Miliadou Nice teeth!