http://www.webmd.com/oral-health/guide/fluoride-treatment#1
https://www.washingtonpost.com/national/health-science/what-toxins-have-you-been-exposed-to-your-baby-teeth-may-hold-the-answer/2016/07/11/9cf1d740-1d18-11e6-b6e0-c53b7ef63b45_story.html?utm_term=.e4b15d2fbe05
http://www.webmd.com/oral-health/healthy-mouth-15/kids-teeth/video-preventing-bad-dental-habits
http://www.radiologyinfo.org/en/info.cfm?pg=dentalconect