They Were Told to Point It With Their Lips

In 1917 a young woman took a job painting watch dials. The paint glowed in the dark, which was the point — the watches were for soldiers who needed to read the time in a trench.

The paint was radium in a zinc sulfide base, and the brushes were fine camel hair that lost their point after a few strokes.

The instruction was to reshape the tip with your lips. Lip, dip, paint.

Radium behaves like calcium

That single chemical fact is the entire tragedy.

Radium sits directly below barium and calcium in the periodic table, and the body cannot tell the difference. Ingested radium is processed as though it were calcium and deposited where calcium goes: into bone.

Once there it stays. The half-life of radium-226 is about 1,600 years, so a dose taken in 1918 continues emitting alpha particles inside the bone for the rest of the person’s life and long past it.

And it was deposited where it entered — closest to the mouth, at the highest concentration, in the jaw.

What it did

The condition became known as radium jaw, and it is one of the more horrifying things in occupational medicine.

Radiation killed the bone from inside. Dead bone cannot resist infection or repair itself, so the jaw became chronically infected and began to disintegrate.

Teeth loosened and fell out. Sockets did not heal — they stayed open, suppurating, for months.

And the jaw came apart. There are documented cases of dentists removing fragments of jawbone by hand while examining a patient, and at least one account of a woman’s lower jaw coming away in pieces.

Several of the women had their entire lower jaw removed in an attempt to stop the infection. Anaemia and bone cancers followed, because the radium had also reached the rest of the skeleton and the marrow inside it.

The women were dying in their twenties.

They were told it was syphilis

The part that makes this a story about power rather than only chemistry.

The company physicians who examined the women knew radium was involved. Internal examinations documented the connection. And the public explanation offered was syphilis — a diagnosis chosen because it was untreatable, socially ruinous, and would prevent anybody from being believed.

One woman’s death certificate recorded the cause as syphilis. It was radium.

Meanwhile the same industry was selling radium as a health tonic. Radium water, radium toothpaste, radium suppositories. Its danger was not unknown — the scientists handling it in laboratories were already using shielding — and the dial painters were told the paint would make their cheeks rosy.

The court case that changed employment law

Five women in New Jersey, sick and running out of time, sued. The press called them the Radium Girls.

The company’s defense strategy was delay, because the plaintiffs were dying and a dead plaintiff ends a case. Hearings were postponed. Medical experts were retained. When the women were too ill to attend court, depositions were taken in their homes.

They settled in 1928 — for money that was small and for an admission that mattered.

And in Illinois, Catherine Donohue went further. Weighing under 30 kilograms and unable to walk, she testified from a bed carried into the hearing room. She won. The appeals were fought all the way to the Supreme Court, which declined to hear the company’s final challenge, and she died before the money arrived.

What those cases established:

That an employer could be liable for occupational disease, not only for accidents.

That latency does not extinguish a claim — an illness appearing years after exposure is still caused by it.

And that industrial safety standards for radioactive material were necessary. The rules written afterwards are credited with protecting the workers on the Manhattan Project two decades later.

They are still radioactive

This is the detail that stays with people.

Radium-226’s half-life means the isotope in those skeletons has barely begun to decay. Exhumations for scientific study through the twentieth century found the bones still measurably radioactive — enough to expose photographic film, decades after burial.

Some of the graves are noted by local authorities. The women are, in a literal sense, still emitting.

Why it belongs in a magazine about mouths

Because of what it demonstrates about the jaw as a route into the body.

The mouth is not a sealed compartment. It is the most absorptive surface most people have and the most direct path to bone, and the dial painters were poisoned by a habit that seemed so trivial nobody thought to write it down as a procedure. They were pointing a brush.

Everything that goes into a mouth goes somewhere. Usually that doesn’t matter. When it does, the jaw finds out first — which is why the jaw is where a great many systemic conditions show themselves before anything else does.

The short version

Women paid to paint glowing dials were instructed to shape the brush with their lips, swallowing radium hundreds of times a day.

Radium is chemically like calcium, so it went into bone, and the jaw got the highest dose. It died, became infected and came apart, and some of them had it removed entirely. They were told it was syphilis.

They sued and won, and employment law changed. Their skeletons are still radioactive.