芬兰牙科总院对一些人紧握牙刷使劲刷牙的方法提出了警告。因为这样过分用力地刷牙会引起牙龈萎缩、牙根磨损。芬兰的研究人员研究出一种科学的刷牙方法：用大拇指、食指和中指像握住一支钢笔那样握住牙刷。正确的刷法能使人的牙龈少受磨损，而清洁度照样合格。选择牙刷的标准? The Finnish General Dental Hospital warned of some people holding their toothbrushes to brush their teeth vigorously. Because this brushing too hard will cause gingival recession, root wear. Finnish researchers have developed a scientific method of brushing their teeth: hold the toothbrush with your thumb, forefinger and middle finger like a pen. Correct brushing can make people’s gum less wear and tear, and cleanliness is still passing. Choose the standard toothbrush?