A hands-free toothbrush that takes just 10 seconds to clean teeth could save people hours every year.

The Amabrush looks a bit like a mouth guard and can brush teeth automatically. Users place it in their mouths and press a button. The device then dispenses toothpaste and vibrates for 10 seconds, long enough to clean every tooth, according to the creators.

"Even in this 10 seconds, every tooth surface is cleaned longer compared with common toothbrushes," the makers said on Kickstarter. "If you brush your teeth for the recommended 120 seconds with a regular toothbrush, every surface gets brushed for just 1.25 seconds. Amabrush brushes all your surfaces for the whole 10 seconds."

On average people spend 108 days brushing their teeth across their lifetime, according to Amabrush.