RADIUS

Which RADIUS brush, for which age?

The children's range steps up in head size and handle shape as a child's mouth and grip change, so the age on the box matters more than it does with most brands.

Why a replaceable head?

Only the bristles wear out, but a conventional brush makes you bin the handle with them. A RADIUS handle is bought once and kept; after that you buy heads, which come in 2-packs and are a fraction of the size of a whole brush.

Check which head fits before ordering: Source and Tour share one type, Big Brush takes its own, and Big Kidz another.

How often should the head be changed?

About every three months, or sooner if the bristles have splayed — once they bend outwards they stop reaching along the gumline, which is the part that matters most.

Replace it after a cold or a throat infection too. Bristles hold bacteria, and there is no way to properly disinfect them at home.

The floss

RADIUS floss is a vegan sponge floss rather than a thin waxed thread, in clove cardamom and vanilla mint. The sponge texture expands slightly in the gap, which suits wider spacing between teeth; it is not the one to choose for very tight contacts.

More in toothbrushes, dental floss and kids' oral care.