This question has plagued many a person...
At Uni it was a soft-bristled small-head brush that could get into all the nooks and crannies. The old Reach compact toothbrush was great: the head of the toothbrush just covered the thumb nail and the bristles were closely packed together. But alas this toothbrush disappeared off the market many, many years ago.
All I wanted was a soft-bristled compact toothbrush. And then a rep from Prime Dental showed me a brush: stroking the bristles with your thumb was wonderful. It was soft and gentle. It still felt there was some resistance to it.
My love affair with the Curaprox CS5460 began.
When I first searched for Curaprox CS5460, I came across the description that it had gained legendary status: this was about 11 years ago. It may have been a marketing ploy. Curaden of Australia still advertises it with that status.
The CS5460 is just a toothbrush with 'billions' of ultra-thin bristles which support each other as they sweep the biofilm (plaque) off the teeth. It is gentle on the hard tooth structure and great next to the edge of the gum. I have suggested that people stroke the teeth from the gum line to biting edge or chewing surface of the teeth and then repeat that same action: almost a slight circular motion away from the teeth. From gum to tooth, from gum to tooth...
I love this diagram, which comes from this website. Just a really simple schematic representation of how a five thousand four hundred and sixty bristled toothbrush works. I usually describe this process as a massaging and not a brushing of one's teeth. And, yes I still need my assistant to count the number of bristles.
And finally, the colours .... I think a the purple with green bristles works best.
Dr Timothy O'Connell-Maritz