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In our daily life, toothpaste is necessary, but more or less we can not control the amount of use, resulting in waste. Medically, everyone 's daily use of toothpaste should not be excessive , is not only a waste of excess toothpaste but also it will destroy the enamel and harm the teeth . This design will replace the traditional circular cap into a flat shape, so that the daily use toothpaste to decrease by approximately 50% to achieve the same effect.
Southwest Jiaotong University;
Wang Jinglong Cheng Yanyan