[stavros]

I use an electric toothbrush, and it leaves no sign of plaque (highly recommended over non-electric ones, by the way). When I start feeling plaque over my teeth, I know it's time to change the brush, that happens maybe every three months.

[kaliszad]

That assumes you use a suitable electric toothbrush and technique. If you search my comments I have written about dental hygiene before at length.

I use Philips Sonicare, heard good things about Oral-B iO from a dental hygienist who has patients using both.

Of course, flossing using a super floss (OralB makes those) and interdental brushes by Curaprox/ TP of correct sizes is important to also clean the space between your teeth and significantly lower the likelihood of gingivitis and almost eliminates the progression to periodontitis.