http://www.prnewswire.com/news-releases/the-importance-of-mouthguards-as-fall-sports-begin-300510134.html
http://health.usnews.com/health-care/articles/2017-08-18/are-you-ignoring-gum-disease
http://www.npr.org/sections/health-shots/2017/08/14/542830158/navigating-the-aisle-of-confusion-to-whiten-your-teeth
http://www.medscape.com/viewarticle/883628?nlid=117115_2281&src=WNL_mdplsd_170808_MSCPEDIT&uac=268021EG&impID=1403833&faf=1