新奇事件簿 错误的刷牙方法

Scientists say we clean our teeth the wrong way. Researchers from University College, London found that most of the advice that dentists give us is very different. They add that we have been cleaning our teeth the wrong way. The researchers looked at tooth-brushing advice in dental¹ textbooks, toothpaste instructions and dental clinics. They found five different basic ways of tooth-brushing and decided² all of them were incorrect. Most of the methods involve moving the toothbrush along the teeth, with the brush moving round and round in small circular³ movements. The researchers said we should stop doing this and use a back-and-forth movement instead.

科学家称，我们刷牙的方式是不对的。伦敦大学学院的研究者发现，不同牙医给我们的建议，差别很大。研究人员称，我们一直在用错误的方法刷牙。研究人员查看了牙科书籍、牙膏说明以及牙科诊所的刷牙建议。他们总结了5种不同的基本的刷牙方式，而且认定这5种方式都是错误的。大多数方法包括刷牙时沿着牙齿，而且刷牙的时候要用牙刷做微小的圆周动作。研究人员称，我们应该停止这种刷牙方式，而是采用上下运动的刷牙方法。

Aubrey Sheilam, lead author of the study and professor of dental public health, said: "The public needs to have sound information on the best method to brush their teeth." The research suggests not brushing teeth too much. More than twice a day damages the enamel⁴ on the teeth. The recommended time for brushing is no longer than three minutes each time. The research also says using too much pressure and brushing your teeth too hard will also damage teeth. Researchers also advised not cleaning your teeth immediately after eating. This is when acid⁵ is strongest in your mouth and this acid will damage teeth. A final recommendation⁶ was to clean the tongue too because it also has a lot of bacteria.

奥布里，是本次研究的首席作家和牙科公共卫生学教授，他说，公众需要刷牙方面良好的信息。研究建议不要频繁刷牙。每天刷牙超过两次，就会损坏牙釉质。建议每次刷牙时间控制在3分钟以内。研究还表明，刷牙用力过大，也会损坏牙齿。研究者还建议，不要在吃完东西之后立即刷牙。这是因为，刚吃完东西的时候，口中酸的含量是最多的，这种酸会损坏牙齿。最后一条建议是，刷牙时也要刷一下舌头，因为舌头上面也有很多细菌。

1 dental   

adj.牙齿的，牙科的

参考例句：

• You can get free dental treatment.你可以得到免费的牙齿治疗。
• I had undergone a major dental operation.我经受了一次牙科大手术。

2 decided   

adj.决定了的，坚决的；明显的，明确的

参考例句：

• This gave them a decided advantage over their opponents.这使他们比对手具有明显的优势。
• There is a decided difference between British and Chinese way of greeting.英国人和中国人打招呼的方式有很明显的区别。

3 circular   

adj.圆(形)的，环形的；循环的；n.传单，通报

参考例句：

• The bright boy altered it to a circular form.这个聪明的男孩把它改成了圆形。
• The lamp stands on a circular base.这盏台灯是装在圆形底座上的。

4 enamel   

n.珐琅，搪瓷，瓷釉；(牙齿的)珐琅质

参考例句：

• I chipped the enamel on my front tooth when I fell over.我跌倒时门牙的珐琅质碰碎了。
• He collected coloured enamel bowls from Yugoslavia.他藏有来自南斯拉夫的彩色搪瓷碗。

5 acid   

n.酸；酸性物质；adj.酸的，酸性的

参考例句：

• Handle with care,or the acid may get out.小心轻放，否则酸会溢出来。
• The acid has been eating away the sides of the container.酸腐蚀着容器的四壁。

6 recommendation   

n.推荐（信）建议，优点，长处

参考例句：

• I wrote him a good recommendation.我为他写了一封很好的推荐信。
• This method deserves recommendation.这种做法值得提倡。