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Not brushing properly? Oral-B's latest smart brush, the Genius 9000, is here to teach you the key to sparkling gnashers.

It ropes in your smartphone to help -- stick your phone on your mirror with the included bracket, and the toothbrush's app uses the front-facing camera to gauge whereabouts in your mouth you're brushing, and for how long.

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Your mouth is represented by these six zones on the app, each of which turns white when the brush thinks you've cleaned that area enough.

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You even get rewards for good brushing.

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This is handy: Pressure sensors in the brush can tell if you're pushing too hard and damaging your gums. It'll glow red to warn you to ease off a bit.

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Here's the brush itself.

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My dentist would be proud.

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It shows you brushing stats over the past days, weeks or months.

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The idea is that it'll encourage you to learn how to brush properly and to maintain the technique.

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You can customise the glowing colours of the brush to suit your tastes. Of course I chose hot pink.

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