生活百科：護牙系列之十——怎樣巧用草莓美白牙齒

Steps 步驟

STEP 1：步驟1
Mash the strawberry with a fork and mix it with the baking soda. The baking soda buffs away stains from coffee, tea, and blueberries that penetrate your enamel over time.

STEP 2：步驟2
Using a soft toothbrush, apply the mixture to the teeth you want to whiten.

STEP 3：步驟3
Let the mixture set for five minutes.

STEP 4：步驟4
Brush your teeth with toothpaste as usual. Floss to get out any seeds from the strawberry.

Rinsing with a little hydrogen peroxide mixed with water after brushing kills bacteria and whitens teeth.

STEP 5：步驟5
Rinse your mouth with mouthwash to wash away residual acid. Your teeth will be gleaming and stain-free.

In the Middle Ages barbers also practiced dentistry.