Assertion: electric toothbrush's bristle | /r/AtLocation | contact
Facets:
value: with the gum
type: OTHER
value: with tooth surface
type: OTHER
Source sentences:
text: Angle the brush at 45 degrees to the gum line so the bristles are in contact with the gum and tooth surface.
text: No matter what we're doing, the mechanical toothbrush only works when the bristles of the head of the toothbrush are in contact with all the places around the teeth and along the gumline...