大多数人喜欢在早上和晚上两个时 间刷牙。其实从科学健康的角度来说，刷牙的最佳时间应该是在每次进餐结束后的两三分钟左右。 医学家们认为，人的口腔内细菌分解重物残渣中的蔗糖、果糖．淀粉，产生的酸性物质会腐蚀溶解牙釉质而引起龋齿，这个过程在饭后３分钟内就开始了。 Most people like to brush their teeth two times in the morning and at night. In fact, from a scientific health point of view, the best time to brush your teeth should be about two or three minutes after each meal. Medical scientists believe that human oral bacteria break down heavy residues of sucrose, fructose. Starch, the resulting acid will corrode the enamel and cause tooth decay, the process begins within 3 minutes after a meal.