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Language: en

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The dentist is clocking out after an 
especially long day- a root canal,  

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a wisdom tooth extraction, too many cavities to 
count - when her cell phone rings. She answers,  

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and is surprised to hear the panicked 
voice of her wife on the other line.

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Her heart stops for a moment as she imagines the 
worst- a car accident? A house fire? But after  

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listening for a moment, she is able to gather 
enough context to relax. Their son lost his first  

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tooth today. There was a bit of blood on his face, 
which had sent her wife into a bit of a state,  

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but now, as they both realize it was nothing more 
than a standard right of passage, the moment of  

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terror is over. When the dentist arrives home, 
she finds her wife and son sitting at the kitchen  

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table with dinner ready, and her wife is in the 
middle of a story. She is telling their son,  

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who listens wide-eyed and rapt, all about the 
magical creature known as The Tooth Fairy.

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Later that night, after they've read the boy 
a story and put him to bed, the two mothers  

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remind him to put his freshly lost tooth under 
his pillow. When he wakes up, they promise,  

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the tooth fairy will have left him a surprise! 
They wait for him to fall asleep, and then,  

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when they hear his gentle snoring, it's time for 
the swap. The mother who works with teeth all  

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day opts to do the honors. It only seems fair. She 
sneaks into the room, careful not to wake the boy,  

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and lifts the edge of his pillow. Hang on...what 
happened to the tooth? She can't see it anywhere.

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She lifts the pillow just a bit more, but 
she can't find it. What she sees instead  

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is a fluttering motion as something small and 
winged darts out from underneath the pillow.  

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She covers her mouth to stifle a startled 
scream. It's just a moth, she realizes,  

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as the little winged shape darts around the 
darkened room. Nothing to worry about. The  

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tooth probably got lost in the sheets. Nothing to 
worry about. She slips a quarter under the pillow  

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and sneaks back out of the room. She doesn't stay 
long enough to see the little winged creature,  

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the thing she thinks is a moth, fly toward 
her son's face, landing in his open mouth.

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The next morning, the boy is delighted to find 
a shiny quarter under his pillow! He is less  

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delighted to find that he has come down 
with a sudden case of the sniffles and  

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sneezes. As the dentist heads 
off for another day of work,  

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her wife calls out her own job, opting to keep 
the boy home from school today- just in case.

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Meanwhile, the dentist is hard at work once more. 
Today is a bit less stressful than yesterday,  

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but not by a wide margin. Her first patient 
of the day refuses to sit still while she  

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checks for cavities, nearly kicking 
her in the process. After they leave,  

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she takes a moment in the back with 
a cup of coffee, centering herself.  

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When she walks back into the waiting room, she 
sees her wife sitting there with their son. What  

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are they doing here? She asks her wife, and sees 
tears in her eyes as she struggles to answer.

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She turns to their son and asks him what's 
wrong. He doesn't say a word. Instead,  

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he just opens his mouth. The tooth he lost the 
day before has grown back- but that's not all.  

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His mouth is full of teeth, and that is not 
hyperbole. There are teeth all across the  

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roof of his mouth, the insides of his cheeks, 
covering his tongue. The dentist suspects that,  

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if she shone a light down his throat, 
she would see teeth all the way down.

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She had better call in a specialist,  

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because this is no job for an ordinary 
dental practitioner. It isn't her fault,  

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she could never have been prepared for her 
son to come down with a case of SCP-478.

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SCP-478 is a species of small entities, of varying 
size and shape, which resemble a darkly-colored  

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butterfly or moth when in flight. Though they have 
been encountered in the wild frequently, they are  

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elusive and difficult to capture. Instances of 
SCP-478 that have been contained do not appear to  

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have a need for food, sleep, air, or reproduction. 
There is still little known about the nature  

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and motives of SCP-478, but this much is clear: 
they are predatory in nature, and tend to target  

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humans under the age of 25, especially those who 
have not yet lost all of their deciduous teeth.

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When an instance of SCP-478 finds its 
prey, it will enter the victim's mouth  

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while they sleep and attach itself to the 
soft palate in the upper nasal cavity,  

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blocking one of the nostrils. After the creature 
has embedded there, the victim's body will begin  

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to produce an excess of mucus. With the 
stuffy nose and increased mucus production,  

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the victim will wake to believe they have come 
down with a cold. A bit of an annoyance, sure,  

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but nothing some rest, lots of fluids, and a 
bit of grandma's chicken soup recipe can't cure.

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That would be true, if it were in fact a cold.

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But as the condition progresses, the 
victim soon realizes that they have  

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come down with more than a case of 
the sniffles. Soon after waking up,  

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the victim's palate will begin to generate teeth, 
at a rate far faster than ordinary tooth growth.  

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The more teeth grow in, the faster they 
grow, and the more quickly they spread.

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These teeth will continue to sprout from 
the palate, more and more teeth emerging  

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through the skin, until the entire palate 
has been covered. But it doesn't stop there,  

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oh no. It continues down the victim's throat and 
into the esophagus. Over the next several days,  

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usually between two and four, the growth of 
teeth will continue down into the stomach lining,  

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filling the stomach. Then, teeth will begin to 
grow in the lungs, making it difficult to breathe,  

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then will grow from the subcutaneous layer of 
skin. The law of conservation of matter comes into  

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play as these teeth sprout. The calcium required 
to produce them can't just come from thin air.

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It must come from somewhere in the body. In this 
case, that would be the skeleton. Skeletal calcium  

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is leached away to provide new teeth with the 
material they require. As you might imagine,  

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this process is extremely painful, 
and downright unpleasant in every way.

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Now, there is no polite way to put this. 
The ultimate stage of the infestation  

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involves teeth growing downward, through the 
digestive tract. The growth stops once the  

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entire digestive tract has been filled with 
teeth. Then the SCP-478 instance will fly  

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out through the victim's mouth, leaving the 
tooth-filled victim behind. These teeth are,  

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aside from their placement, ordinary. 
They contain a root, nerve, enamel,  

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just like any tooth you might find in a mouth. 
You know, where teeth are ordinarily found. The  

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parts of the body where the teeth have formed may 
expose them to unusual conditions, such as the  

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high concentration of acid in the stomach. Teeth 
that form within the skin, on the other hand,  

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group together and form large, hard masses of 
dental material beneath the surface of the skin.

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The method by which SCP-478 induces 
this heightened growth of dental  

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tissue is currently a mystery. At first, 
Foundation research into the nature of  

00:06:34.080 --> 00:06:40.040
the anomalous beings resulted in few leads. But 
then, one potential lead emerged in an unlikely  

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place. In order to understand the nature of 
this lead, then I must first take us back in  

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time to the year 1956. Dr. Rasmin Yelkov was 
issued a task by his comrade, Dr. Grigori.

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Grigori asked Yelkov to develop a method 
that would allow him to produce perfect  

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specimens of human teeth. New, authentic 
specimens, not taken from a cadaver,  

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or made from an alternative material. It seemed 
like an impossible task, until a fellow doctor  

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told him stories of an unnamed man who had 
found something impossible: tooth faeries.

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Dr. Yelkov's colleague brought him to the 
man with no name, who told him all about  

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these faeries. While traveling during the war in 
search of remedies, the man said that he met and  

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captured a faerie called Isabella. This Isabella 
taught the unnamed doctor the faerie language,  

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and appointed herself his assistant. From 
there, Isabella taught the unnamed doctor  

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about the methodology of the faeries- how 
they could draw enamel from human bones,  

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and how they used that enamel as a source 
of nutrients to sustain themselves.

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Naturally, Dr. Yelkov had his doubts about the 
strange man's claims. He asked for proof, as any  

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of us might in the face of faerie tales, and the 
doctor with no name was happy to provide it. He  

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took Dr. Yelkov to his workshop, and upon stepping 
through the door, the doctor was met with the  

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sight of at least fifty faeries fluttering around 
the room, their dark, iridescent wings beating as  

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they flitted to and fro. This was it. The secret 
key he had been looking for, the way to unlock  

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the seemingly impossible task he had been issued. 
The man offered Dr. Yelkov a room for the night,  

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and he accepted, with the intent of learning more 
about the secrets of the faeries in the morning.

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But the events of the evening did not go 
according to plan. When Dr. Yelkov offered  

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to purchase some of the faeries from the man, 
in order to use them for his own research,  

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the offer was refused. Dr. Yelkov, ever 
the ruthless pragmatist, drew his weapon  

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and fired one single shot through the unnamed 
doctor's heart. With no one left to top him,  

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he grabbed a large jar and began to capture 
the faeries. He managed to catch thirty  

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of them in total before setting off on 
the journey back to his own laboratory.

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Once Dr. Yelkov was back in his laboratory, he 
examined the faeries more thoroughly. They looked  

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like ordinary butterflies at first glance, but 
a closer look revealed humanoid characteristics-  

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arms, hands, legs, and faces. While 
inspecting (and performing autopsies  

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on) several of the creatures, Dr. Yelkov 
determined that the specimens contained  

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unidentified chemicals which react with 
the oral environment. He isolated these  

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chemicals for further study. 
Now the real work could begin.

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Dr. Yelkov analyzed the way in which 
the faeries' physiology interacted  

00:09:22.760 --> 00:09:24.748
with sodium monofluorophosphate and 
hexofluorosilic acid, and in doing so,  

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was able to reproduce the effects a 
faerie might have on a human body-  

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recreating it on a common fungus. This was 
not enough for a finished product, however,  

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as the fungus had no source of calcium that would 
allow for the formation of human teeth. He would  

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have to test his new research on human subjects 
in order to truly gauge its effectiveness.  

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For his first test subject, he selected an 
eight year old child from a camp in Moscow.

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She was injected with 20ml of the serum he 
had managed to develop, and observed for ten  

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days without any notable changes. Then, on the 
eleventh day of the trial, the patient was short  

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of breath and complaining of abdominal pain. An 
X-ray showed a large mass beneath her left lung.  

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Two days later, the patient was dead, and Dr. 
Yelkov extracted a large mass of calcium from  

00:10:13.640 --> 00:10:20.400
her lower left abdomen. The cause of death was 
massive internal bleeding caused by this very mass

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Over the course of several more human trials,  

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Dr. Yelkov fine-tuned his serum. It was producing 
calcified masses in the bodies of the subjects,  

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sure, but Dr. Grigori was expecting teeth. 
He was getting closer though. By trial four,  

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he had managed to create teeth, though they 
were undeveloped and had not fully grown to  

00:10:38.680 --> 00:10:45.440
the proper size and shape. But it was progress, 
grim and gruesome as the process was. By trial 19,  

00:10:45.440 --> 00:10:49.960
he had cracked it. The test subject was the 
teenage daughter of an American businessman  

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named Kyle Schrader, a man so greedy and craven he 
had sold his own child for medical testing all for  

00:10:56.400 --> 00:11:03.600
a hefty chunk of change: 2.6 million dollars, 
courtesy of Dr. Yelkov's patron, Dr. Grigori.

00:11:03.600 --> 00:11:10.320
This trial was...frankly, horrific to read. I have 
pored over some disturbing scientific documents in  

00:11:10.320 --> 00:11:15.800
my time, but never something that distressed me 
quite so much as the tale of a teenage girl sold  

00:11:15.800 --> 00:11:22.000
by her father, made a lab rat by a mad doctor, 
treated without anesthesia, and lobotomized when  

00:11:22.000 --> 00:11:28.560
she complained. But Dr. Yelkov did not see it 
as a horror. He was simply elated that his labor  

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had yielded that most calcium-rich of fruits: 
teeth. He packaged the extracted tooth specimens  

00:11:34.680 --> 00:11:40.080
and sent them to Dr. Grigori for approval, 
along with seven other dental practitioners.

00:11:40.080 --> 00:11:45.000
Now, I am not one to express a belief 
in karma per se, and Dr. Grigori's exact  

00:11:45.000 --> 00:11:50.320
fate is unconfirmed to this day...but I 
believe we can extrapolate what became  

00:11:50.320 --> 00:11:54.280
of him based on what the Foundation 
learned about Dr. Yelkov's work. And  

00:11:54.280 --> 00:12:00.520
if my guess is correct...then I believe Dr. 
Grigori got exactly what was coming to him.

00:12:00.520 --> 00:12:03.760
When SCP Foundation agents 
raided Dr. Yelkov's laboratory,  

00:12:03.760 --> 00:12:09.320
they discovered a series of phenomena that 
were later designated SCP-1994. These,  

00:12:09.320 --> 00:12:14.520
as we can now surmise, were the results 
of Dr. Yelkov's research with SCP-478.

00:12:14.520 --> 00:12:21.920
SCP-1994-1 is a serum, the chemical makeup of 
which has been rather difficult to pin down. Some  

00:12:21.920 --> 00:12:26.560
samples of the serum have had higher levels 
of sodium monofluorophosphate, while others  

00:12:26.560 --> 00:12:31.960
have had higher levels of hexafluorosilic acid. 
Either way, application of this serum stimulates  

00:12:31.960 --> 00:12:36.600
the growth of both maxillary and mandibular 
tooth structures, all outside of their usual  

00:12:36.600 --> 00:12:43.560
environment of a human mouth. These resulting 
structures are classified SCP-1994-2, and though  

00:12:43.560 --> 00:12:49.080
they appear identical to human teeth at first 
glance, they lack the basic structures of teeth.

00:12:49.080 --> 00:12:54.160
For example, they have no dentin layer, or pulp 
tissue. They are simply solid pieces of dental  

00:12:54.160 --> 00:13:00.760
enamel, and are highly vulnerable to decay. As 
these enamel pieces decay, they release a white  

00:13:00.760 --> 00:13:07.280
powder that is capable of infecting those who 
inhale it with a version of SCP-478's effects.

00:13:07.280 --> 00:13:14.520
Individuals infected with SCP-1994-2 powder, or 
who have been administered a dose of SCP-1994-1  

00:13:14.520 --> 00:13:23.160
serum, are termed SCP-1994-3. Once exposed, the 
infection progresses through five stages. First,  

00:13:23.160 --> 00:13:28.360
there is initial exposure, after which the subject 
has no visible signs of infection for up to two  

00:13:28.360 --> 00:13:35.400
weeks. Notably, this infection works far less 
quickly than a direct infestation of SCP-478.  

00:13:35.400 --> 00:13:40.160
During this two-week period, calcium deposits will 
begin to develop throughout the person's body,  

00:13:40.160 --> 00:13:44.560
as cell structures ordinarily used for 
immune system response will reorient to  

00:13:44.560 --> 00:13:47.800
become capable of gathering the 
components for producing enamel.

00:13:47.800 --> 00:13:51.920
After the two-week period is up, and these 
calcium deposits have been effectively  

00:13:51.920 --> 00:13:56.400
"cooking" under the skin the entire time, 
the subject will begin to develop cysts  

00:13:56.400 --> 00:14:01.440
all over their skin, beginning on the limbs 
before progressing to the head, neck, back,  

00:14:01.440 --> 00:14:07.400
and groin. These cysts are painful to the touch, 
and the subject will be compelled to resist any  

00:14:07.400 --> 00:14:13.160
attempts to remove them in spite of the pain 
and discomfort. As the cysts grow and spread,  

00:14:13.160 --> 00:14:17.960
they will rupture the skin, and slowly decrease 
the metabolic functions of the subject.

00:14:17.960 --> 00:14:23.400
At a point approximately five weeks after 
initial exposure, the cysts will burst open,  

00:14:23.400 --> 00:14:28.600
revealing the mature adult human tooth that 
has been growing beneath the surface. Once  

00:14:28.600 --> 00:14:33.320
the tooth has emerged, it cannot be removed 
from the skin tissue except via surgery.  

00:14:33.320 --> 00:14:38.240
Once the subject has reached this stage, the 
breakouts of teeth will occur faster and faster,  

00:14:38.240 --> 00:14:42.280
spreading until they have covered all of the 
extremities, and then will begin to manifest  

00:14:42.280 --> 00:14:46.160
in the soft tissues of the palate, 
the inner ear, and ocular tissues,  

00:14:46.160 --> 00:14:52.720
spreading to every orifice. This stage of the 
infection remsembles an infestation of SCP-478,  

00:14:52.720 --> 00:14:58.680
though the teeth are lacking the interior nerve 
and pulp present in those created by SCP-478.

00:14:58.680 --> 00:15:03.920
Though the teeth may be removed through surgery, 
as I mentioned, the surgery is only a temporary  

00:15:03.920 --> 00:15:09.520
fix. After any teeth are removed from the 
body, new growths will form in their place.

00:15:09.520 --> 00:15:13.840
After eight weeks following initial infection, 
the entire body of the subject will be covered in  

00:15:13.840 --> 00:15:21.760
a layer of teeth, or SCP-1994-2. But then, it all 
gets even worse. The teeth will begin to develop  

00:15:21.760 --> 00:15:27.320
carious lesions across all of their surfaces. It 
is unknown how these teeth decay, given the fact  

00:15:27.320 --> 00:15:32.680
that they are not exposed to any acid-producing 
oral bacteria. But they do decay just the same,  

00:15:32.680 --> 00:15:38.120
and the process is highly unpleasant. Over 
the course of no more than seven days,  

00:15:38.120 --> 00:15:43.360
all the thousands of teeth across the subject's 
body begin to show signs of gross decay,  

00:15:43.360 --> 00:15:48.840
and release that aforementioned infectious white 
powder. This is possibly due to the use of fungus  

00:15:48.840 --> 00:15:54.960
in the serum's development phase, as this white 
powder is somewhat reminiscent of fungal spores.

00:15:54.960 --> 00:16:00.000
After the subject's body is covered in fully 
rotten teeth, they will perish in the ultimate  

00:16:00.000 --> 00:16:05.160
stage of infection. The cause of death is due 
to the combination of weakened immune system,  

00:16:05.160 --> 00:16:09.440
exposure to massive amounts of decay, and 
the inability to eat anything or receive  

00:16:09.440 --> 00:16:15.200
nutrition intravenously. No subjects have 
lived longer than two weeks past full decay.

00:16:15.200 --> 00:16:20.640
SCP-1994 was discovered during a raid conducted 
by the Foundation, in collaboration with GRU  

00:16:20.640 --> 00:16:26.440
Division P operatives in the former USSR 
in 1959. When they raided the laboratory,  

00:16:26.440 --> 00:16:33.840
the Foundation discovered nine instances of 
SCP-1994-3. Seven had already died, and two were  

00:16:33.840 --> 00:16:40.560
decaying. Dr. Yelkov was nowhere to be found, but 
the Foundation did recover his notes and journals.  

00:16:40.560 --> 00:16:45.160
The faeries he spoke of in his notes were also 
nowhere to be found, and the Foundation was unable  

00:16:45.160 --> 00:16:50.840
to confirm their existence for several years. 
But then, they discovered an instance of SCP-478  

00:16:50.840 --> 00:16:57.320
in the wild. Dr. Yelkov really had encountered 
these creatures, captured them, studied them.

00:16:57.320 --> 00:17:02.080
Any instances of SCP-478 that are found are 
to be surgically removed from their victims  

00:17:02.080 --> 00:17:06.600
before death, and kept in one piece. After 
they have been recovered, they must be kept  

00:17:06.600 --> 00:17:13.600
in specialized vacuum-sealed lockers in Bio-Site 
66. As instances of SCP-478 do not appear to be  

00:17:13.600 --> 00:17:19.360
able to pass through solid matter, they may be 
held indefinitely (as long as no damage occurs).  

00:17:19.360 --> 00:17:24.560
Victims who have only been mildly affected by 
SCP-478 may be given ordinary treatment in a  

00:17:24.560 --> 00:17:29.040
civilian medical establishment, though Foundation 
surgeons must perform the procedure under the  

00:17:29.040 --> 00:17:34.760
guise of orthodontic surgery. As with 
ordinary surgery, the patient must be sedated.

00:17:34.760 --> 00:17:41.720
Victims who have been severely affected by SCP-478 
must be taken to Bio-Site 16 for study. Because of  

00:17:41.720 --> 00:17:48.200
the unique way in which SCP-478 works, infected 
individuals must not be terminated prematurely.  

00:17:48.200 --> 00:17:52.400
Victims who have been deemed capable of a 
full recovery are to be treated for infection,  

00:17:52.400 --> 00:17:56.560
and released from Foundation custody. 
After recovering, they must be given  

00:17:56.560 --> 00:18:02.600
a Class-B Amnestic, and false memories must 
be planted so avoid arousing any suspicion.

00:18:02.600 --> 00:18:08.440
Though the process of infection that SCP-1994-3 
instances go through shares some symptoms with a  

00:18:08.440 --> 00:18:14.120
SCP-478 infestation, many of the symptoms 
differ dramatically. This, in particular,  

00:18:14.120 --> 00:18:19.560
interests me. It would seem that the chemical 
components produced by SCP-478 are not the  

00:18:19.560 --> 00:18:24.200
only factor in their effects on the human 
body. Something else must be responsible,  

00:18:24.200 --> 00:18:29.200
something that requires the physical presence 
of one of these so-called "faeries" rather than  

00:18:29.200 --> 00:18:34.560
just the compounds they secrete or the chemical 
reactions they cause. Though I disagree deeply  

00:18:34.560 --> 00:18:40.320
with his methodology, I can see why Dr. Yelkov 
was so compelled to study these creatures.

00:18:40.320 --> 00:18:44.960
If the Foundation is ever able to track 
down Dr. Yelkov, provided he is still alive,  

00:18:44.960 --> 00:18:49.360
they may be able to discover more about 
these tooth faeries. If Dr. Yelkov had  

00:18:49.360 --> 00:18:53.640
left the other nameless researcher alive, he 
might have learned even more about them- how  

00:18:53.640 --> 00:18:58.920
to communicate with them, for example. If that 
other man's story is to be believed, these beings  

00:18:58.920 --> 00:19:04.680
are sentient. They have names, their own language, 
and are capable of intelligent communication.

00:19:04.680 --> 00:19:08.880
Maybe, with some further study (and 
some cooperative living specimens),  

00:19:08.880 --> 00:19:13.480
the foundation could learn the secrets of the 
faerie language just as the other doctor did.  

00:19:13.480 --> 00:19:17.680
Imagine the possibilities if we could speak to 
these creatures! Perhaps they could ask them  

00:19:17.680 --> 00:19:22.440
why it is they do what they do to us. Perhaps 
they could broker some sort of peace between  

00:19:22.440 --> 00:19:28.720
the species. Perhaps, and this might be naively 
optimistic of me, they could ask them to stop.  

00:19:29.800 --> 00:19:32.920
In the meantime, if you find 
a quarter under your pillow,  

00:19:32.920 --> 00:19:38.600
make sure to check the inside of your mouth. 
You might just find an uninvited guest.

00:19:38.600 --> 00:19:42.640
Check out the Dr. Bob Patreon and 
become a junior researcher today!  

00:19:42.640 --> 00:19:50.240
Now go and watch another entry from the 
files of Dr. Bob, like "SCP-2450 - TEETH!”