4.You're brushing too hard.

　　4.你刷牙太用力了。

　　The chances of enamel breakage are greater when you brush too hard.

　　刷牙力气过大更容易损伤你的牙釉质。

　　5.You're using the wrong brush.

　　5.你用错了牙刷。

　　Be sure to buy soft or ultrasoft brushes to minimize damage. Electric toothbrushes are great tools if they help you brush longer and get you to the right places.

　　确保你使用的是柔软的或超软的牙刷，这样能使损伤降到最低。如果电动牙刷能帮助你刷的更久，并且刷对了位置，那么它就是最好的。

　　6.You have the wrong toothpaste.

　　6.你用错了牙膏。

　　Baking soda toothpastes are good at getting stains out because they are abrasive -- but that also means they're hard on enamel.

　　小苏打牙膏能很容易把污渍刷出来是因为它们有研磨作用—但是这也意味着它们比较坚硬会伤害牙釉质。

　　7.You're failing at flossing.

　　7.你不会用牙线清理。

　　Start with a full foot of floss, twirling the ends around the middle finger on each hand. Use your thumb and forefinger to gently work the floss between two teeth, being careful not to pull it roughly or saw it back and forth, both of which can injure the gum. Wrap the floss around one tooth and wipe up and down to loosen and remove plaque. Then do the same on the next tooth and repeat.

　　开始用一段牙线，将线的两段缠在左右手中指上。用你的食指和拇指轻轻地在两齿之间拨动牙线，小心一点不要太粗鲁或前后牵动，这样会伤害到牙龈。将牙线缠在牙齿上，上下前后拉动，清除附着在牙齿上的菌斑。然后换旁边的牙齿，重复相同的动作。

　　8.You don't rinse after.

　　8.刷完牙后未冲洗。

　　Effective brushing and flossing unbind bacteria-laden plaque from the surface of teeth. Rinsing afterward is a key step to make sure that bacteria leave your mouth for good.

　　有效的刷牙和使用牙线能使细菌斑快速从牙齿表面脱离。在洗完后再次漱口是很关键的一步，确保细菌已从嘴里离开。

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（责任编辑：何莹莹）