Daily tooth brushing became a widespread habit in the United States and much of the Western world in the late 1940s, after World War II soldiers brought home the strict oral hygiene routines they’d been required to follow in the military. Before that, most people rarely brushed at all. The path from ancient twig-chewing to the twice-a-day routine we know today took thousands of years and depended on a surprisingly small number of turning points.
Ancient Origins: Chew Sticks and Frayed Twigs
People have been cleaning their teeth in some form for over 5,000 years. The Babylonians and Egyptians created the earliest known “toothbrushes” between 3500 and 3000 B.C. by fraying the ends of twigs to create rough fibers that could scrub the teeth. These weren’t mass-produced tools. They were simply sticks, often from aromatic trees, chewed and rubbed against the gums. Versions of these chew sticks are still used in parts of Africa and the Middle East today.
The Chinese are credited with inventing something closer to the modern toothbrush in the 1400s: pig hair bristles attached to handles made from bone or bamboo. This was a real leap, giving people a dedicated tool with a handle and replaceable bristles, but it stayed regional and was far from a daily habit for ordinary people.
The First Mass-Produced Toothbrush
In 1780, an Englishman named William Addis created the first mass-produced toothbrush in Europe, using cattle bone for the handle and swine fibers for the bristles. The story goes that Addis came up with the idea while in prison, where he fashioned a brush from a saved animal bone and bristles. After his release, he turned it into a business. His company, Wisdom Toothbrushes, still exists today.
Even with commercial toothbrushes available, brushing remained uncommon through the 1800s and into the early 1900s. The brushes were expensive, the bristles were stiff and prone to falling out, and most people simply didn’t see the point. Tooth decay was treated as an inevitable part of life rather than something preventable.
Pepsodent and the Power of Advertising
The first major shift in public behavior came not from dentists but from an ad man. In the early 1900s, advertising pioneer Claude Hopkins launched a campaign for Pepsodent toothpaste that reframed brushing as a beauty habit rather than a health chore. He told people to run their tongue across their teeth and feel the “film,” then promised that Pepsodent would remove it and give them a whiter smile.
The results were staggering. Before the campaign, only about 7% of Americans used toothpaste. By the time it ended, that number had jumped to 65%. Hopkins didn’t invent tooth brushing, but he made millions of people want to do it for the first time by appealing to vanity rather than health. The “Pepsodent smile” became a cultural touchstone.
Nylon Bristles Changed Everything
One reason brushing had been slow to catch on was the brush itself. Boar hair bristles were rough, dried slowly, and harbored bacteria. In 1938, DuPont introduced nylon bristles, which were smoother, dried faster, and could be manufactured cheaply and consistently. This was the first truly modern toothbrush, and it made the tool far more pleasant to use and affordable to buy.
Still, even with nylon brushes on the market, daily brushing wasn’t yet a universal habit in America. That required one more push.
World War II: The Real Turning Point
The event that cemented brushing as a daily American habit was World War II. The military required soldiers to brush their teeth every day as part of their hygiene regimen, recognizing that dental problems could sideline troops just as effectively as injuries. For millions of young men who had never brushed regularly, it became as routine as shaving.
When those soldiers came home in the mid-to-late 1940s, they kept the habit. According to the Smithsonian Institution, returning servicemen brought their new oral hygiene routines with them into civilian life, and their families adopted them too. Combined with the now-affordable nylon toothbrush, daily brushing finally became normal across American households. By 1940, the American Dental Association was already publishing materials recommending brushing twice a day, giving the public a clear standard to follow.
Fluoride Toothpaste Sealed the Deal
Even as brushing became common in the late 1940s, toothpaste itself wasn’t doing much beyond cleaning. Until the mid-20th century, most toothpastes were little more than pleasant-smelling abrasives. Companies made bold claims about preventing cavities, but none of their products actually delivered, which frustrated the American Dental Association. Meanwhile, cavities were developing at a rate of hundreds of millions per year in the U.S.
That changed in 1955, when Procter & Gamble introduced Crest toothpaste with stannous fluoride, developed through a partnership with Indiana University. For the first time, a toothpaste could genuinely help prevent cavities. In 1960, the ADA formally recognized Crest as effective against tooth decay, the first time it had endorsed any toothpaste. Crest quickly outsold every competitor, and the idea that brushing was medically important, not just cosmetic, became firmly established in public consciousness.
This was a pivotal moment. Brushing shifted from a cleanliness ritual to a proven health practice backed by scientific authority. Parents who might have been casual about their own brushing started insisting their children do it, creating the generational habit that persists today.
Electric Brushes and Modern Standards
The first electric toothbrush, the Broxodent, appeared in 1954, originally designed for people with limited motor skills or orthodontic braces. It took decades for electric brushes to gain mainstream popularity, but they added another layer of accessibility, making effective brushing easier for people who struggled with manual technique.
By the 1960s, the basic framework of modern oral hygiene was in place: affordable nylon brushes, fluoride toothpaste with ADA backing, and a cultural expectation that everyone brushes twice a day. What had been a niche habit practiced by less than 10% of Americans at the start of the century had become one of the most universal daily rituals in the developed world, all within roughly 50 years.
The timeline is shorter than most people expect. Your great-grandparents likely grew up without brushing their teeth at all. The habit that feels ancient and obvious is, in historical terms, barely two generations old.