https://www.colgate.com/en-us/oral-health/conditions/dry-mouth/dry-mouth-at-night–the-causes-and-management-tips-?fbclid=IwAR2vTVYpnrS88vB_GA6IXEtI5DsaIjRf019yderzqxwHGyaoz-01gQg6Poc
https://www.colgate.com/en-us/oral-health/basics/brushing-and-flossing/this-is-what-happens-when-you-don-t-brush-your-teeth-?fbclid=IwAR2hl0n5hhtuRg25xZYTbC77K0-_J2eIFJfIKnP-fIhwT-VjEtVmjPoSE8E
https://www.medicalnewstoday.com/articles/326428.php
https://www.mouthhealthy.org/en/oral-cancer-slideshow
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OLYMPUS DIGITAL CAMERAhttps://www.colgateprofessional.com/education/patient-education/video-library/stages-of-periodontal-disease-gum-recession
https://www.onhealth.com/content/1/dry_mouth
https://www.dentalhealth.org/news/which-comes-first-brushing-or-flossing-new-study-shows-that-we-should-clean-between-our-teeth-before-brushing
https://www.medicalnewstoday.com/articles/322577.php
https://www.sciencedaily.com/releases/2018/01/180116111145.htm