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://www.24-7pressrelease.com/press-release/tooth-pain-a-sign-of-allergy-season-reports-focusedcaredentalcom-220287.php
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/video/is-it-gum-disease
http://www.webmd.com/oral-health/teeth-gums-age#1
https://www.youtube.com/watch?v=xdMIfEHArWs
https://www.youtube.com/watch?v=H2NrqWJkui8