6. Switzerland
DMFT Score: 0.9
Switzerland is the first country on our list to have a DMFT score of less than one. To be specific, Switzerland has a DMFT score of 0.9. This means that on average all the subjects who went through a DMFT checkup had less than a single tooth with problems. Given that developed countries tend to suffer more from tooth decay due to higher sugar intake, it looks like people in Switzerland are not that attached to sweets, or they take really good care of their teeth.