https://www.mouthhealthy.org/en/az-topics/c/chewing-gum
https://www.mouthhealthy.org/en/az-topics/f/fluoride
https://www.youtube.com/watch?v=rtpYi_Tm2Js
http://www.dentistryiq.com/articles/2017/02/the-surprising-link-between-periodontal-disease-and-heart-health-what-dental-professionals-need-to-know.html
https://youtu.be/3SwYRfMc53U
https://www.youtube.com/watch?v=Oj0ZwLhm4EU&feature=youtu.be
https://www.tcdentalpros.com/before-and-after-photos/