noun, noun or participle which takes 'suru', intransitive verb
brushing teeth; dental brushing
Refers to the act of brushing one's teeth. Can be used as a noun or with する as an intransitive verb.
毎日、寝る前に歯磨きをする。
I brush my teeth every day before going to bed.
歯磨きの後は、口の中がさっぱりする。
After brushing my teeth, my mouth feels refreshed.
noun
toothpaste; tooth powder; dentifrice
Refers to the substance used for brushing teeth, such as toothpaste or tooth powder. This usage is less common than 歯磨き粉 (はみがきこ).
この歯磨きはミントの味が強い。
This toothpaste has a strong mint flavor.
昔は歯磨きに粉を使っていた。
In the past, people used tooth powder for brushing teeth.