http://onlinelibrary.wiley.com/doi/10.1111/jopr.12504/full
https://www.carefreedental.com/resources/13-dental-health/90-why-sports-drinks-are-destroying-athletes-teeth
http://www.cnn.com/2016/03/04/health/when-to-replace-toothbrush-sick/index.html
http://www.webmd.com/oral-health/guide/dental-health-dental-care-products#1
https://thedoctorweighsin.com/easy-diet-tips-for-beautiful-strong-teeth/
http://www.deardoctor.com/articles/implant-timelines-for-replacing-missing-teeth/
http://www.smithsonianmag.com/smart-news/george-washington-didnt-have-wooden-teeth-they-were-ivory-180953273/
