New research has revealed that modern dental hygiene would have no place in ancient Rome.

Scientists appointed by the Archaeological Superintendence of Pompeii have used CAT scans to examine 30 Pompeii inhabitants who were preserved in hardened ash after Mount Vesuvius erupted in AD 79. The group, headed by radiologist Giovanni Babino, released photos of their work on Sept. 29, and revealed in a press conference that the ancient Romans had perfect teeth and “no immediate discernible need for dentists,” according news agency Agenzia Giornalistica Italia.

Though they never used toothbrushes, toothpaste or floss, they had healthy teeth thanks to their low-sugar diet.

Massimo Osanna, superintendent of the World Heritage-listed site, said their diet was “balanced and healthy, similar to what we now call the Mediterranean diet,” according to The Telegraph.

“The inhabitants of Pompeii ate a lot of fruit and vegetables but very little sugar,” said orthodontist Elisa Vanacore, who oversaw the examination of the teeth. “They ate better than we did and have really good teeth.”

Vanacore also noted that the citizens of Pompeii would have benefited from the high levels of fluorine in the air and water near the volcano.

Studying teeth could help determine the age of the bodies examined and reveal more details about life in Pompeii. The scientists are hoping to analyze 86 plaster casts in total from Pompeii, and the research should ultimately uncover the age, sex, diet, diseases and social classes of the preserved Pompeii citizens.

But though the ancient Romans’ healthy teeth may come as a surprise, they aren’t the only historical group who are believed to have had better teeth than people today.

Despite the popular belief that the Tudors had poor dental hygiene (a stereotype largely owed to Queen Elizabeth I, who indeed had rotting teeth), most early Tudors had remarkably healthy teeth—once again because of the lack of sugar in their diet. When sugar production became common in Spain, France and Holland during the 1600s, the price dropped and sugar became a common feature of many Europeans’ diets.

In short, if you want to save yourself a trip to the dentist’s office, cut down on the sugar…or live next a volcano. Start by cutting down on sugar though.