Chronic gum disease is called periodontitis, which occurs when waste material or plaque collects around the teeth and irritates the gums. Plaque is removed when teeth are looked after properly.
It is not clear how gum disease may trigger heart problems, although it is thought that bacteria released from the infected gums are the key.
The bacteria enter the bloodstream where they may activate the immune system, making artery walls inflamed and narrowed, or attach directly to fatty deposits already present in the arteries which causes further narrowing.
"The most severe teeth disease was associated with the most widespread arterial lesions,"