We have adopted a ~15 degree tanned neck~ that makes it easy to see the tip of the brush and the brushed tooth surface. The ~Yamagata Brush~ efficiently scrapes off dirt from the grooves of the back teeth and areas that are prone to tooth decay, which are often left unpolished. ~Rhombus grip~ + ~non-slip~ that fits your fingers makes it easy for moms and dads to use.
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