The proper length of toothbrush for an adults were suggested as 21.4 to 30.5 mm for males and 20.9 to 29.6 mm for females. The proper width of toothbrush head size were suggested as 7.6 mm, and the height of the toothbrush head were suggested 10.7 mm for males and 10.3 mm for females; 2.
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The proper length of toothbrush for an adults were suggested as 21.4 to 30.5 mm for males and 20.9 to 29.6 mm for females. The proper width of toothbrush head size were suggested as 7.6 mm, and the height of the toothbrush head were suggested 10.7 mm for males and 10.3 mm for females; 2.
so that when you talk to people,the smell of your mouth is pleasant
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