http://www.deardoctor.com/inside-the-magazine/issue-34/root-cavities/
http://www.colgate.com/en/us/oc/oral-health/life-stages/oral-care-age-55-up/article/oral-health-for-seniors
https://www.colgate.com/en-us/oral-health/basics/brushing-and-flossing/how-to-floss
https://www.cdc.gov/Features/HealthyMen/
http://www.everydayhealth.com/oral-head-and-neck-cancer/dentures-and-oral-cancer.aspx
http://www.colgate.com/en/us/oc/oral-health/conditions/bruxism/article/do-i-need-a-night-guard-0313