揭秘牙齿保健误区:饭后必刷牙

资料图:游泳

　　SWIMMING

　　游泳

　　A study of 500 swimmers found 66 per cent of them had damaged teeth as a result of chlorine.

　　一项由500名游泳爱好者参与的研究发现，其中66%的人牙齿会受到氯的侵害。

　　‘Chlorine affects the pH of the water and makes it acidic, so swallowing it can lead to tooth erosion,’ says a researcher.

　　研究人员称：“氯会改变水的PH值，使之变成酸性，吞咽了这些水会导致蛀牙。”

　　‘This can result in yellowing teeth – because the acid strips the enamel and starts to reveal darker-coloured dentine underneath. It is not a common problem, but may be an issue for regular swimmers who spend a long time in the pool each day.’

　　“此外氯还会导致一口黄牙，因为酸性物会剥蚀掉釉质，致使后层颜色较深的牙质显露出来。尽管这不算是普遍问题，但对于那些每天都泡在游泳池的人来说，这个问题不容忽视。”

　　REDUCE THE RISK: Try to keep your mouth closed while swimming. Don’t brush your teeth straight after your dip because at this time the surface of the teeth could be softened by the acidic chlorine and could be more easily brushed away.

　　如何补救：游泳时紧闭嘴唇，游完之后不要立即刷牙，因为这时牙表面可能正好被酸性的氯软化了，这样釉质会被轻易地刷掉。