Want whiter, healthier teeth? It's all about increasing salivary flow, according to experts at the American Dental Association.

And crunchy foods high in fiber tend to do just that. They increase salivary flow, which helps wash away lingering bacteria. Over time and if eaten regularly, they can help scrub stains off your teeth.

» RELATED: These 9 healthy-sounding foods have more sugar than a Krispy Kreme doughnut

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Waymo autonomous vehicles operate across 65 square miles inside I-285 and have been involved in six incidents with Atlanta Public School buses since May. Waymo issued a recall because of their cars briefly stopping or slowing down before continuing forward while a bus was stopped and flashing its lights. (Courtesy of Atlanta Public Schools)

Credit: Courtesy of Atlanta Public Schools