Periodontitis – a form of gum disease – could affect people with expatriate medical insurance.
This condition is closely linked with diabetes, according to British Society of Periodontology president elect Philip Greene.
It is believed the inflammatory compounds produced by periodontitis increases the insulin-resistance of diabetics, so these two conditions can improve alongside each other when controlled, he explained.
Stress is also believed to be a risk factor and can affect the oral diseases' progress, although it is not thought to cause it, the expert continued.
Mr Greene recommended using toothpaste with fluoride, which increases enamel's acid resistance and reduces the likelihood of tooth decay.
He noted that electrically operated brushes perform just as well as manual ones but are "much easier" to utilise.
Gum disease is also related to conditions including respiratory and kidney ailments, heart problems, strokes, difficulty conceiving and dementia, chief executive of the British Dental Health Foundation Dr Nigel Carter recently claimed.