The bacteria in the mouth travel throughout the body via inhalation, ingestion and circulation causing adverse effects to it.
Signs and Symptoms of gum disease:
Drifting to a different position
Bad Breath (Halitosis)
Foul Taste in mouth
Elderly people who do not brush at least once per day were up to 65 per cent more likely to develop dementia than those who brushed twice daily. Gum disease is an indication of exposure to inflammation, which in turn can proceed to harm brain tissue and cause dementia.
For further reading and information: (Holmes 2013)