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What Was Dental Hygiene Like During the Middle Ages?

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Answer by Tim O’Neill, M.A. in medieval literature and have studied most aspects of the period for many years:

People in the Middle Ages considered healthy, white teeth a sign of beauty and wrote of sweet-smelling breath as a desirable attribute. So, not surprisingly, we have extensive evidence that people liked to keep their teeth clean and a large amount of evidence of toothpastes and teeth powders, as well as mouth washes and treatments for halitosis.

Contrary to the depiction of medieval peasants with blackened and rotting teeth, the average person in the Middle Ages had teeth that were in very good condition. This is substantially due to one factor—the rarity of sugar in the diet. Most medieval people simply could not afford sugar, and those who could used it sparingly, usually as a seasoning or minor ingredient and almost never as a condiment or the basis of a dish. This means that most people used natural sugars, such as those in fruits and honey; even then, they ate this kind of sugar sparingly. Taken with a diet high in calcium via dairy, high in vegetables and cereals, and low in foods that cause decay, the average medieval person ate the way most modern dentists would recommend for good teeth.

Not surprisingly, tooth decay was actually much less prevalent in the Middle Ages than it became in later centuries, when mass imports of sugar from the tropics made it a staple rather than a rarity. Surveys of archaeological data from the medieval period show that an average of only 20 percent of teeth show any sign of decay, as opposed to up to 90 percent in some early 20th-century populations. A more common dental issue for medieval people was not decay but wear. Eating stone-ground bread daily as part of almost every meal meant medieval people’s teeth saw considerable abrasion from grit that over years led to the teeth being worn down. To an extent this actually helped prevent decay, as their molars had less crevices in which plaque could accumulate. But in the long run it could lead to the complete abrasion of dentine and tooth loss.

Medieval people cleaned their teeth by rubbing them and their gums with rough linen cloths. We have various recipes for pastes and powders that could be put on the cloth to help clean the teeth, to whiten them, and to aid fresh breath. Sage ground with salt crystals was one popular mixture. Powdered charcoal from rosemary stems was another. A crushed paste of pepper, mint, and rock salt was also used, and there were many more. Most consisted of an abrasive and a scented herb, though others included a range of spices such as cinnamon, mace, and cloves.

Mouth washes tended to be wine- or vinegar-based, with herbs and spices steeped in these acidic liquids. Again, mint features heavily in these recipes, along with marjoram and cinnamon. Chewing fennel seeds, parsley, or cloves were the most common recommendations for bad breath.


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