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1.The toothbrush can replace brushing instead of the whole brush head.That's cheaper and environmental.
2.The toothbrush can detect degree of cleanliness and show on the toothbrush when you brush your teeth.That make teeth cleaner ,and people can do brushing efficient with knowing information of cleaning this area.
3.With the information of cleaning,people can participate to game about that with friends.That make it interesting and attractive.
China Agricultural University