(140225) -- BARCELONA, Feb. 25, 2014 (Xinhua) -- A woman shows the Oral-B SmartSeries electric toothbrush at the Mobile World Congress (MWC) in Barcelona, Spain, on Feb. 24, 2014. Users can connect mobile phone with the toothbrush via bluetooth and personalize their brushing experience with the Oral-B app on their phone. The MWC kicked off Monday in the city of Barcelona with the presence of 75,000 delegates from 200 countries and regions as well as 1,800 companies from the mobile telecommunications sector. (Xinhua/Xie Haining) (lmz)
(Photo by Xinhua/Sipa USA)
J Niice saw a co-worker brushing his teeth in the bathroom. He’s either brushing his teeth for the first time or maybe, his second. How many times do you brush your teeth a day?