Netflix Pulled a Documentary About Root Canals and Cancer in 72 Hours. Here's What They Were Really Protecting.

There is a very short list of things that make the dental industry move fast.

A documentary on Netflix is not supposed to be one of them.

And yet in January 2019, within 48 hours of a film called Root Cause going live on the platform, the American Association of Endodontists and the American Dental Association had already issued formal statements demanding its removal. Netflix pulled it within 72 hours.

No explanation. No statement. Just: gone.

The official reason, delivered through industry press releases, was that the film was "dangerous." Not inaccurate. Not misleading. Dangerous. That single word — chosen by lawyers who know exactly what they're doing — tells you more than anything in the film itself.

The documentary followed an Australian filmmaker named Frazer Bailey, who spent ten years searching for the root cause of his own chronic illness. What he found pointed to the root canal treatments sitting inside his own teeth — and to decades of buried research suggesting they were doing far more damage than anyone in the industry wanted to admit.

The film made uncomfortable claims. It was imperfect. It has been criticised.

But none of that explains the speed of what happened next.

Because here's the thing about pulling a documentary in 72 hours: you don't do that to protect public health. You do that to protect market share.

The Research That Predates the Cover-Up by a Century

The ideas in Root Cause weren't new. They were first published in the 1920s by a dentist named Weston Price — one of the most credentialed dental researchers of his era.

Price's theory was called focal infection theory. The premise was straightforward: bacteria trapped inside a dead, root-filled tooth don't stay contained. The tubules running through each tooth — microscopic channels that number in the millions — create pathways. Bacteria leak through. They enter the bloodstream. They settle elsewhere in the body and cause problems that appear to have nothing to do with teeth.

Price spent decades documenting this. He published. He presented. He built a body of evidence that was taken seriously by the medical establishment of his time.

Then, in the 1950s, it disappeared.

Root canals generate an estimated $22 billion a year globally. The average procedure costs $1,500. Fifteen million are performed in the US alone every year. It is, by any measure, one of the most profitable procedures in the history of medicine.

And it only exists because teeth get infected.

Which raises the question that the documentary stumbled onto — and that the industry needed to bury before anyone thought too hard about it:

What if there was something that prevented teeth from ever getting to that point? Something that rebuilt enamel from the inside, eliminated the bacterial entry point, and made the entire chain of events leading to a root canal far less likely?

There is. It's been used in Japan for 40 years. Your dentist almost certainly hasn't mentioned it.

The Cover-Up Timeline Nobody Mapped Out

Once you see the sequence of events, the shape of what happened becomes hard to dismiss as coincidence.

• 1920s–1940s
  Dr. Weston Price publishes extensive research on focal infection theory. Mainstream medicine takes it seriously. The root canal procedure is still relatively uncommon.
• 1950s
  Root canal procedures begin their rise to become a standard dental treatment. Focal infection theory is quietly reclassified as "discredited" — without a definitive refuting study.
• 1970s
  NASA identifies hydroxyapatite — the exact mineral human teeth are made of — as capable of rebuilding tooth and bone structure. Japanese researchers begin developing it for dental use.
• 1993
  Japan approves nano-hydroxyapatite as a mainstream dental ingredient. It becomes the standard recommendation across Japan and begins spreading through Europe and Asia. No US or Australian adoption.
• January 2019
  Root Cause goes live on Netflix. Millions watch it. Dental associations issue emergency statements within 48 hours. Netflix removes the film in 72.
• Today
  Nano-hydroxyapatite is still called an "alternative" ingredient in Western markets. 15 million root canals are performed in the US every year. Your toothpaste almost certainly still contains fluoride.

What Your Teeth Are Actually Made Of — And Why It Matters

Here is the single fact that the dental industry cannot afford to become common knowledge:

Your teeth are 97% hydroxyapatite.

That's the mineral. That's what enamel is. When acid, bacteria, and daily wear erode your teeth — what's being lost is hydroxyapatite, layer by layer, year by year.

Fluoride — the ingredient that has been in your toothpaste since before your parents were born — works by coating the surface of your enamel. It creates a harder outer shell. It slows the erosion. But it does not rebuild what's already gone. It cannot. That is not its mechanism.

Nano-hydroxyapatite does something different. The particles are engineered to penetrate enamel's microscopic pores and bond to the existing tooth structure at the molecular level. It fills the cracks. It repairs early-stage damage. It rebuilds the tooth using the exact mineral the tooth is made of.

Healthier enamel means fewer entry points for bacteria. Fewer bacterial entry points means less infection. Less infection means fewer root canals.

Follow that chain and you understand why the ingredient that Japan has used for 40 years is still "alternative" here — and why the documentary that started asking questions about root canals was gone in 72 hours.

What People Found After They Started Asking Questions

The people who made the switch weren't naive. They were the ones who watched the documentary before it disappeared. The ones who kept asking questions after it was gone. The ones who found the research themselves.

The Question the Industry Can't Answer

The dental associations that pulled Root Cause have never adequately explained why they moved so fast.

They said the film was dangerous because it might cause people to avoid necessary dental treatment. That's the official position.

But think about what that actually means. A documentary that makes people question whether root canals are safe is called dangerous. An ingredient that rebuilds enamel and reduces the likelihood of needing those procedures is called alternative. The organisations making both of those classifications are funded, in significant part, by the same industry that performs the procedures.

You don't have to believe everything in Root Cause to understand what happened when it was removed.

You just have to ask one question: who benefits from you never seeing it?

And then ask the same question about the ingredient that's been standard in Japan for 40 years — and is still called alternative here.

The answer is the same both times.

Editorial Note: This article is produced by The Daily Science editorial team and contains affiliate links to Herblix. The documentary Root Cause (2019) is referenced for journalistic context. Weston Price's focal infection theory remains contested within mainstream dentistry. Statements about nano-hydroxyapatite are based on published peer-reviewed research. This content is not intended as medical or dental advice. Individual results may vary. Consult a qualified dental professional regarding your individual oral health needs.