Does gum disease have a link to cancer, dementia, stroke?

Researchers are looking at whether mouth bacteria is connected to many other diseases.
Read more: https://www.washingtonpost.com/national/health-science/scientists-search-for-link-between-gum-disease-and-cancer-dementia-stroke/2016/09/30/bb966cba-7e9d-11e6-8d0c-fb6c00c90481_story.html?tid=pm_national_pop_b?source=Snapzu