Invention of the Mouthguard

Before mouthguards existed, boxers bit down on cotton, tape, sponges, and even quartered oranges to protect their teeth. London dentist Woolf Krause changed everything in 1890 when he crafted the first real mouthguard from gutta-percha. His son Philip later swapped it for reusable rubber, and Rodney Lilyquist eventually introduced the vacuum-molded acrylic version you'd recognize today. The full story behind each breakthrough is more fascinating than you'd expect.

Key Takeaways

• Before mouthguards existed, boxers protected their teeth using crude materials like cotton, tape, sponges, wood pieces, and quartered oranges.
• London dentist Woolf Krause invented the first true mouthguard in 1890, crafting it from gutta-percha to prevent lip lacerations in boxers.
• Philip Krause improved his father's design by replacing gutta-percha with vella rubber, creating the first reusable mouthguard in history.
• Multiple inventors competed for credit, including Jacob Marks, Thomas Carlos, Allen Franke, and Rodney Lilyquist, each advancing dental protection technology.
• Rodney Lilyquist's thin, clear, vacuum-molded acrylic mouthguard earned him recognition as the father of the modern mouthguard.

What Did Boxers Use Before Mouthguards Existed?

Before purpose-built mouthguards existed, boxers relied on crude, makeshift materials to protect their teeth and lips.

In the world of boxing before mouthguards, you'd find fighters biting down on cotton, tape-wrapped teeth, sponges, or small wood pieces to prevent dental damage. Some even used quartered oranges during bare-knuckle bouts.

These improvised dental protection devices required constant jaw tension to stay in place, which divided your focus during fights. Materials degraded quickly, offered minimal reuse, and still couldn't reliably prevent fractures or lacerations. You'd to actively clench throughout every exchange just to maintain basic protection. It wasn't until 1890 that London dentist Woolf Krause fashioned the first true mouthguard out of gutta-percha to shield boxers from lip lacerations.

The driving force behind these early innovations was necessity, as boxers desperately needed a reliable solution to broken teeth that the makeshift materials simply could not provide.

Woolf Krause and the First Real Mouthguard in 1890

These crude makeshift solutions cried out for something better, and in 1890, a London-based English dentist named Woolf Krause answered that call. He crafted the first formal mouthguard, called a gum shield, from gutta-percha, a rigid rubber-like substance derived from Palaquium tree sap. Krause specifically targeted lip cuts that plagued boxers, offering far superior protection compared to tape, cotton, or wood.

The design stuck tightly to the teeth and required clenched jaws to stay in place. Despite material limitations that made it single-use, it effectively prevented lips from getting sliced and stopped teeth from rattling together. Boxers welcomed this structured solution, and Krause's invention laid the groundwork for every mouthguard refinement that followed, including improvements later made by his own son Philip. Philip refined his father's original design by replacing gutta-percha with vella rubber, creating a more practical and improved version of the gum shield. His improved gum shield proved its worth when it was used in a professional bout between Jack Britton and Ted Lewis in 1921.

Who Else Claimed to Invent the Mouthguard?

While Woolf Krause's 1890 gum shield earned him lasting recognition, he wasn't the only dentist staking a claim to the mouthguard's invention. Alternative claims to mouthguard invention came from multiple figures across different eras.

Jacob Marks designed a custom-fitted mouthguard for boxers in early 1900s London, addressing the impracticality of earlier devices. American dentist Thomas A. Carlos made his first mouthpiece in 1916, later suggesting it to Olympian Dinnie O'Keefe in 1919. Then Rodney O. Lilyquist created a transparent acrylic splint in 1947, earning him recognition as the father of the modern mouthguard.

The importance of early mouthguard designs lies in how each inventor independently pushed protective dental technology forward, building on previous limitations to serve athletes better. Allen Franke also claimed to have made and distributed numerous mouthguards for boxers by 1919, further adding to the list of early pioneers disputing sole credit for the invention. Krause's original gum shield was crafted from gutta-percha, a latex rubber derived from the sap of the gutta-percha tree.

How Phillip Krause Made Mouthguards Actually Wearable

Woolf Krause's original gum shield worked, but barely. It was rigid, single-use, and required you to clench your jaw constantly just to keep it in place. His son Philip, a trained dentist and amateur boxer, recognized these flaws and set out to fix them.

Philip swapped gutta-percha for vella rubber, a far more pliable material that fit better without demanding constant jaw tension. That single change delivered increased comfort and drove wider acceptance among boxers throughout the mid-to-late 1920s. The rubber version also became the first reusable mouthguard, eliminating the hassle of replacing it after every use.

Philip's firsthand boxing experience shaped every refinement he made. He wasn't just improving a product — he was solving a problem he'd personally felt during competition. By 1950, acrylic resin had entered the picture, marking the next major leap in mouthguard materials after Philip's foundational work.

How Rodney Lilyquist Gave Us the Mouthguard We Recognize Today

Philip Krause's rubber mouthguard was a genuine step forward, but it still looked like something a boxer wore — bulky, obvious, and far from elegant. That changed in 1947 when Los Angeles dentist Rodney Lilyquist introduced something entirely different.

Dentist Lilyquist's invention used transparent acrylic resin, vacuum-molded over a teeth model to create a thin, clear, comfortable fit. You could speak normally while wearing it, and nobody would easily notice it. Lilyquist's groundbreaking contributions earned him nationwide recognition as the father of the modern mouthguard, with his procedure published in the January 1948 Journal of the American Dental Association.

Early adopters included UCLA basketball player Dick Perry and San Francisco 49ers quarterback Frankie Albert, helping launch broader adoption across American sports. This wider recognition was further cemented when the American Dental Association formally acknowledged the importance of mouthguard use in sports, bringing the issue into the national conversation. Before Lilyquist's innovation, the most significant design leap had come in 1930 when Jacob Marks patented a custom-made mouth guard using rubber molds of the upper and lower teeth, offering athletes greater comfort and stability than anything previously available.

When the ADA Made Mouthguards Mandatory Across Contact Sports

Lilyquist's invention had proven what was possible, but turning possibility into policy took decades of organized effort.

The ADA's advocacy for mouthguard adoption began in the 1950s, and by 1962, that push succeeded in making mouthguards mandatory for all U.S. high school football players. From there, sports associations' mandates on mouthguard use expanded steadily.

Today, the National Federation of State High School Associations requires them in football, field hockey, ice hockey, and lacrosse. The NCAA enforces similar rules across those same sports. The ADA now recommends mouthguards in 29 different sports, and four states have extended requirements to include soccer, wrestling, and basketball.

Despite progress, complaints about comfort and interference with play still limit how far mandates reach. During the 1950s, the ADA began formally recognizing the protective value of mouthguards, and that organized promotion effort laid the groundwork for every mandate that followed.

Research consistently shows that the risk of orofacial sports injury is 1.6 to 1.9 times higher when a mouthguard is not worn, reinforcing why governing bodies have pushed so hard to make their use universal.

How Mouthguard Mandates Slashed Dental Injuries in Contact Sports

Once mouthguard mandates took hold, the injury numbers told a stark story. Taekwondo, which mandates mouthguards, recorded only a 3.5% dental injury rate compared to 17.2–21.8% in non-mandated sports like handball and karate.

You'd also find evidence for decreased concussion rates, with one logistic regression study reporting an odds ratio of 0.10 for frequent mouthguard users sustaining sports-related concussions. In college basketball, custom-fitted mouthguards drove dental injury rates five times lower than among non-users.

The science behind it's straightforward — mouthguards absorb and dissipate forces across a wider surface area, reducing concentrated stress on individual teeth and the surrounding structures. The ADA estimates these devices prevent roughly 200,000 injuries annually in high school and college football alone. Individuals who do not wear mouthguards face more than twice the risk of sustaining an orofacial injury compared to those who do.

Among the three types available, custom-made mouthguards offer the highest level of protection, as their precise fit ensures optimal shock absorption and coverage across all teeth and jaw structures.