https://www.medicalnewstoday.com/articles/322577.php
https://oralb.com/en-us/oral-health/conditions/dry-mouth/dry-mouth-causes-remedies-treatments
https://www.nytimes.com/2017/03/23/health/dental-care-older-americans.html?_r=0
http://www.colgate.com/en/us/oc/oral-health/life-stages/oral-care-age-55-up/article/oral-health-for-seniors
http://abcnews.go.com/Health/john-lennons-molar-fight-oral-cancer/story?id=17627303
http://www.colgate.com/en/us/oc/oral-health/conditions/cancer/article/ada-04-take-heed-april-is-oral-cancer-awareness-month
https://www.sleepassociation.org/patients-general-public/bruxism/
http://www.webmd.com/oral-health/video/is-it-gum-disease
http://www.buzzle.com/articles/tips-for-choosing-the-right-toothpaste-for-your-family.html