2. Cambodia
DMFT score: 5.5
We have now stepped into the top 3, and at number 2 of our list of countries with the worst teeth, oral health and hygiene in the have Cambodia, a country in Southeast Asia. Cambodia is a well known tourist destination and vacation spot for the wealthy, but Cambodian dental health and oral hygiene is rather bad. Cambodia has a DMFT score of 5.5 meaning that the group of Cambodian children subjected to the survey on an average had 5.5 teeth that needed immediate medical attention or had already been removed or treated. Unfortunately, things will get only worse from here.