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Growing Teeth with Stem Cell Technology
davidoff404 writes "Lost a tooth lately? Well, a natural cure may be at hand. The BBC is reporting on a grant awarded to researchers at King's College, London, which they say will allow them to develop a technique for growing natural replacement teeth. Using recently developed techniques, stem cells can be programmed to develop into teeth, and then inserted into the gap in a patient's jaw. According to the BBC, the research has already been successfully performed on mice, and clinical trials on humans should begin within two years."
This King's College sure sounds like a front for some true organ cloning, I bet they are running this tooth thing at a loss. Wake up Drucker here we come! Of course how will we tell the hicks apart?
Research on growing teeth? In England? THERE's a fucking surprise, mate.
Finally, a solution to the near-catastrophic lack of Rodent Teeth! I can sleep easy tonight!
"If we let things terrify us, life will not be worth living."
- Seneca
alabama and west virginia?
I understand why they're necessary, but come on, why do they have nerves in them? Fingernails and hair are necessary, and evolution seems to have gotten both of those correct... so why do teeth have nerves? And does this growing of new teeth include the nerves? I have had five root canals and stopped counting my cavities at 40 (I'm half English, that's why - the stereo-type is based in reality), so I am looking to get FAKE teeth (the kind that screw into the jaw - I already have one) and be rid of the miserable real ones I have. I sure as hell don't want them replaced with new real ones. That would just be excruciating.
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Note: This does not mean you can stop brushing your teeth, people! Flossing, okay, maybe, but continue to brush. Please...
No more brushing my teeth and all the Coke I can drink!
Take that, Mother, with all your dire predictions about my teeth rotting out.
This is wonderful news, now I can grow teeth like Tom Cruise's.
Oh wait, this research was done in the UK.
Make that Austin Powers.
John.
Looks like some one has been reading A Gift From Earth.
Old men with baby teeth, that just freaks me out.
It would be the Brits to start doing this though.
"I'm not high, just stupid" --JY
It would be cool if in the future you could have some plasmid novelty joke gum that would alter the stem cell DNA and turn the tooth into a penis or ass. You've been Punk'd, ass mouth!
of all the things to grow are teeth. Why not something like hair. That's where the money is. Look at all the infomercials.
Evolution or ID?
teeth aren't made of the same stuff as hair and nails. teeth are bones, and all bones have blood vessels and nerves in them... unless you want flexible teeth of course...
submission says: According to the BBC, the research has already been successfully performed on mice, and clinical trials on humans should begin within two years.
However the story says: The company Odontis, set up by the college, hopes to develop its research for tests on humans within two years after successful research on mice.
It doesn't sound like they've actually grown MiceTeeth(tm) yet, unless I'm reading that terribly wrong.
I imagine that using this technique that they could grow a tooth anywhere, right? I got a joke in e-mail last week about vagina's with teeth - I could only get to sleep that night by dismissing it as an impossibility. Now what? I'm suffering some serious shrinkage here - tell me it isn't so... Snapping - be careful what you wish for.
Humor from a Genetically Molested Mind
The article doesn't seem to say whether or not these teeth can be grown without fetal stem cells. Expect protest if so.
Rhymes that keep their secrets will unfold behind the clouds.There upon the rainbow is the answer to a neverending story
Since you have root canales than you know that the tooth "dies" when you remove the blood vessels. The tooth is a healthy living organ requiring nutrients. You can remove this but than the tooth starts turning black from the lack of nutrients (any real dentist please step in and fill the voids of knowledge). The nerves are there to let you know when something is wrong. Yeah I wish my legs didn't have nerves when I brook it but I need to know that something was wrong.
What do they need a grant for, can't they just stick all the teeth they grow under their pillows?
It is my understanding that most of the differences in tooth health around the world are due to environmental variance. I grew up in a place where there was a lot of fluoride in the water, and the schools also had programs to provide additional fluoride. This has given me very hard tooth enamel. In the 30+ years of my life, I've only ever had one cavity filled. One would presume that they would grow the teeth in an environment that fosters teeth that are healthy.
When I want your opinion I will beat it out of you.
Correction: teeth are made of enamel, not bone. Enamel is much harder than bone (and in fact living bone tissue is rather flexible IIRC). Teeth have to made of harder stuff than bone in order to grind up some of the different types of foods that omnivores like humans eat.
not the teeth part, but the technology itself.
but the teeth market won't be the market that fuels this research. No, the market is the hair loss market. the same stem cell technology is being used to replace teeth can replace hair follicles.
in traditional hair restoration, hair is transplanted from point A on the bottom of the scalp, where the follicles for some reason don't fall out like they do on the crown. this works, but the hair has to be spread thin, because there's only X amount you can take, and it means there's going to be missing hair from the bottom.
what the cloned hair would do is allow an arbitrary thickness and density of placement, not limited by the donors thickness and supply at the base, since you can take a small amount from the base, clone them to the amount you want, and make a better graft.
i can't wait, being 24 and nearly bald. fight genetics with science.
Reason, free market capitalism, and individualism
Too bad Bush won't allow the U.S. to fund this fantastic, useful research because it clashes with his religious ideals
Step back, oh, sixty-seventy years.
"Too bad the UK won't allow this stunning new Eugenics research, because it clashes with their religious ideals. I mean, it's not like they're PEOPLE or anything."
Stopping research because of religiously-based morals has a long and time-honored tradition, that didn't start with Bush and won't go away when he leaves office.
That said, Bush is just fine with companies doing research with "morally obtained" stem cells. I don't recall what the criteria is, but I do believe that "not from abortion" is a big one, and that about twenty (out of 100 or so) of the extant stem-cell lines qualify.
After watching the icehockey world championship this week I am sure there's a demand for them.
According to the BBC, the research has already been successfully performed on mice, and clinical trials on humans should begin within two years.
With all these advancements we keep performing on mice (mice with human breasts and gigantic ears. Mice that can control things with their mind and are cancer proof...Mice that produce sperm for monkeys,mice that glow in the dark, etc...), it's only a matter of time before we build a renegade breed of super-supergenius mice who become our leaders and take over the world.
It's just like marijuana legalization. The people missing the most teeth tend not to vote.
The CB App. What's your 20?
How do the stem cells know when to *stop* growing the tooth? I mean, clearly there's something telling them when they're done but what happens if something goes wrong? What happens if you drop these things in someone's gum, and it starts growing a tooth, but the shutoff mechanism for the stem cells never activates.. so it just keeps growing.. and growing.. and growing...
LONDON, ENGLAND... A HUGE, WHITE MASS LOOMS OVER THE BUILDINGS ON THE HORIZON
WOMAN, FRIGHTENED AND DRAWING BACK: My God... what is it??
MAN, STANDING BACK DRAMATICALLY: It is... The Tooth.
Irritable, left-wing and possibly humorous bumper stickers and t-shirts
While the growing of teeth is certainly an interesting and useful application of this technology, I personally would like to see how they handle connecting the nerves in the new teeth to the roots in the host.
Depending on how it's handled, it could possibly be applied to a number of other useful medical advances, such as helping repair nerve damage, prosthetic limbs, and spinal cord injuries.
Aren't stem cells wonderful things?
The tooth is a healthy living organ requiring nutrients. You can remove this but than the tooth starts turning black
A more signficant issue is that a dead tooth (ie, post root canal) tends to become brittle over time, and much more likely to suddenly break when stressed.
can they grow hair with stem cells? If they can do that, now THAT would be a goldmine.. fake teeth dont look as fake as fake hair.
I have lived 28 out of 29 years in New York (and one in California). I can tell you that it has nothing to do with environment and everything to do with genetics.
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Correction. It is supported by the vocal population. I bet 90 % of the people in this country could care less. They are too worried trying to find jobs and keep paying the rent.
Humans already have a first and second dentition, why not simply encourage a third with hormones or something? You'd have baby teeth, teenage teeth, and over-the-hill teeth. When your third set started coming in, it would officially be time to go buy that Corvette and get a blonde bimbo for the passenger seat.
On the subject of teeth: Dental care is good enough lately that people don't lose enough teeth to make room in the jaw for the rear molars, the "wisdom" teeth that come in later. It seems obvious to me, that we could tell in the early teens whether an individual's wisdom teeth will be in the way, and then simply prevent their growth with a squirt of botox. It would eliminate their costly and painful removal later.
I recently got a couple of crowns; some 12 year-old fillings had failed, as they often do when they reach that age. I have a number of other fillings that will probably need to be replaced with crowns over the next few years.
At first I wished that the teeth could be replaced with new ones, but then I realized something. The originals lasted 10-12 years before succumbing to decay, and the filled teeth lasted another 12 years. The crowns are made of porcelain-coated steel. They look great, are impervious to decay, and will probably last for the rest of my life. Why would I want to replace them with the troublesome things that were there before?
1. Grow new teeth using stem cell technology.
2. Set up office in Arkansas.
3. PROFIT!
Nope, Vagina dentata are real, although exremely rare (scroll down).
The previous sig has been removed due to
I've been longing for the opposite: a complete replacement. Give me fake teeth that will never break or stain. Teeth that I can just roll down the window at the automated car wash and smile at the colored wax jets :) Teeth that can handle the abuse.
There is nothing more annoying for me than to be constantly reminded to brush and floss and visit the wallet-raping dentist twice a year. Heck, make them snap-on so I can take them out, toss them in a polishing machine for 30 seconds and be good for the day.
But don't go reinventing what's been broke since the dawn of time.
-Billco, Fnarg.com
Fetal stem cell research is almost irrelevant. The Australians have extracted stem cells from baby teeth. It gives new meaning to why the tooth fairy leaves money. Then there is the process for extracting stem cells from body fat. Stem cell research does not need to be used as a reason for killing off unwanted pregnancies. Fetus's are not the only source of stem cells, they are just one of the first sources discovered.
"I went on a diet, swore off drinking and heavy eating. And in fourteen days, I had lost exactly two weeks. Joe E. Lewis
Bush limited fetal stem cell lines eligible for US federally funded research to those available at the time the decision was made. Since then, most of those lines have been found to be so contaminated as to be useless. US researchers were and are crippled by this decision. If you claim that someone has found a way to create clean, pluripotent stem cell lines that do everything new fetal stem cells can do, please provide a citation -- I follow this issue closely and haven't heard about it.
The correlation between ignorance of statistics and using "correlation is not causation" as an argument is close to 1.
I'm sorry, but you are mistaken. While genetics has a some effect on good tooth health, good diet and the presence of fluoride have an even greater effect.
When I want your opinion I will beat it out of you.
Correction to correction: Teeth are not made up of enamel the crown of the tooth is covered with enamel. Check it out here... http://kidshealth.org/kid/body/teeth_noSW.html
Ohana means family. Family means nobody gets left behind or forgotten.
IIAD (American working in England, actually), and I don't see this stuff coming into anyone's mouth for many years to come.
... yeah, they've grown teeth in rats, but in their intestines, IIRC (intentionally in the intestines, but it's still a far cry from functioning dentition in the mouth).
The hurdles here are the same as hurdles for growing ANY tissue from stem cells. You don't just turn stem cells loose and tell them to become teeth. There is a hugely complex interaction of intra- and inter-cellular communication that goes on that tells a given cell whether to become part of the pulp, whether to start secreting enamel matrix, becoming an odontoblast, etc. If this were just five years off, we'd only be five years off from growing *hands*, etc.
Even if we could grow *a* tooth, we would have to grow the *right* tooth, especially in the "esthetic zone". How do we make sure that it *looks* like a central incisor with 11mm of enamel showing above the gingiva? How do we make the color right? Do we just grow something that is sort of tooth-like and put a crown on it automatically? Do we grow it in vitro and implant it in a surgical site? Do we grow it in situ? If so, how do we maintain the delicate balance of cellular influences in a mouth where someone ostensibly couldn't even keep their natural teeth in order?
I think that this is waaaaaay off in the distance. Their five year estimate is pie-in-the-sky pulled-out-of-their-ass.
In addition
I may just stop using email completely... :-\
--- Ban humanity.
Stem cell research does not need to be used as a reason for killing off unwanted pregnancies.
When was it ever used as such? Abortions get chucked in biohazard bags and incinerated like any other sort of medical waste.
You're living in a fantasy world if you think that Superhero Bush stopped legions of money-grubbing women who were clamoring to make a quick buck off of their abortions.
This is a non-issue if you take the time to think about it. Trash... or valuable medical research. Trash... or valuable medical research. Tough call there.
--grendel drago
Laws do not persuade just because they threaten. --Seneca
I had a class in comparative vertebrate morphology last term, and we talked about this very issue. Highly innnervated teeth is a mammalian trait. Other vertebrates (reptiles, amphibians, birds, fish, etc.) don't have a lot of nerves in their teeth. As you probably know, mammals have only two sets of teeth: the milk (or "baby") teeth and the adult teeth. The milk teeth fall out and are replaced during childhood/adolscence. Other vertebrates typically grow replacement teeth throughout their lives.
Why is this the case? Mammals process their food with their teeth much more than other vertebrates do. This allows us to eat more difficult things like tough plant parts and insects with hard exoskeletons that are unavailable as a food source to other vertebrates. This is one of the keys to mammalian success.
Mastication requires precise occlusion of the upper and lower teeth. Mammalian teeth have highly specialized forms for grinding, shearing, tearing, etc., and different regions of the jaw have different shapes of teeth. This precise occlusion is hard to maintain if teeth are constantly being lost and regrown, so mammals compromised: In exchange for really excellent, highly specialized teeth that allow them to exploit otherwise unavailable food resources, they only have two sets of teeth for their entire lives.
Here's a geek analogy: you have a certain amount of money you can spend on a new computer. Do you spend the big bucks and get a really great piece of hardware (like a G5 PowerMac or something) or do you buy rubbish and get two of them? Mammals decided to spend the big bucks and buy quality. Judging by the success of mammals, I'd say they made a good decision.
Having such awesome, precious teeth, mammals must protect them. The muscles of the jaw are easily strong enough to crush your teeth into powder. Having lots of nerves in teeth is one way that mammals prevent their teeth from premature destruction.
So how did mammals get away with only having two sets of teeth? Two ideas: 1) selection is weaker on older organisms that have already reproduced. Problems related to teeth wearing out are generally found among older individuals. 2) Primitive mammals were typically small (like the size of most rodents). Body size is positively correlated with lifespan in mammals, so the early mammals probably idn't live to be very old. Perhaps they didn't live long enough to wear out their teeth. By the time larger mammals evolved the dentition system was sort of set in stone, and they had to make do in other ways (and there are some amazing adaptations found among mammals for preserving their adult teeth as long as possible).
Bah. I take issue with this write-up.
This is exactly what my dentist told me too. However, the problem is with this line:
If a tooth's nerve tissue is present and healthy, wonderful.
No, not wonderful. If I could, I'd have all the nerves removed from my teeth. All they do is hurt every time I eat something cold. Having slightly receding gums makes it much worse than for normal people. I've had one root canal, and that tooth which used to hurt a lot when I ate ice cream now doesn't feel anything at all. Now if I could only have that done easily for the other teeth.
I've researched having implants done, it's quite expensive, and also destructive to your mouth, the process requires filing/drilling of the bone in your mouth in order to insert titanium seats that will then be built-on and capped with false teeth. As someone who's been to the dentist a lot, this prospect is not the most desirable.
BUT, Since I've heard of the work being done with stem-cells, I've always wondered why they've not tried teeth! What's inspiring about this process is:
- It's your OWN stem cells. Your Source-Code. No rejection.
- It's 100% natural, The teeth will continue to behave like real teeth and will wear and change shape along with the rest in your mouth.
- No more fooling with gooey-glop to keep your teeth in.
- No longer afraid to smile "too big" for fear someone might notice that the some of the teeth in your grill don't quite match.
- No fear of flying teeth when you laugh.
- Not having to pull out your teeth when you through the metaldetector at the airport. (they got these metal wires in there)
- Not having to excuse yourself from a restaraunt dinner table because some piece of herb is stuck between the roof of your mouth and your partial.
- being able to taste the full-range of food flavors.
- No more headaches (literally) caused by ill-fitting mouth-gear.
I would gladly volunteer for this. The promise of positive results is just too great.Wrong. An individual who has no teeth will be at a serious disadvantage to even survive, let alone reproduce, especially if they have teeth that are specialized for a particular diet (like eating tough grass or crushing mollusk shells or something). In other words, it impacts the potential to have offspring. If the tooth loss has a genetic basis, then any offspring that the toothless individual does manage to have will be similarly disadvantaged when they reach reproductive age.. However, there would be comparatively little selection on a gene that caused all of their teeth to fall out the minute they finished reproducing.
This is pretty unique to humans in western cultures who eat too much refined sugar. Tooth decay like modern humans get is vanishingly rare in nature.
"Sort of set in stone" refers to phylogenetic inertia. Certain things just don't happen very often in evolution because of the difficulty of redesigning an organism. Why do ostriches have wings? Why do humans have an (apparently) nonfunctional vermiform appendix? Why do vertebrates have two sets of limbs instead of three sets? Why am I feeding a troll?
Maybe you should take a few biology courses yourself, mate.
Amoung dentists, we do consider dentin is a living tissue (or at least, most dentists I know would consider it living). It has microscopic tubules inside in which there are cells or extensions of cells that are in the pulp. If you cut into it (eg. when doing a filling), pain will be percieved. People with recession and exposed root surfaces often temperature sensitivity since the dentin is exposed.
Does dentin require any nutrition? That is a bit of a point of debate still. When a root canal is done, the pulp tissue is removed, and the tooth is essentially dead. Normally, the pressure from inside the pulp causes slow fluid flow through those tubules to the outside. I'm not sure if anybody has determined exactly what that does (perhaps some sort of defensive flushing mechanism has been speculated). I don't know of any studies that have been done about teeth with root canal treatment (and hence lacking this fluid flow) being more vulnerable to anything either.
Teeth which have had root canals do dry out though, and thus the dentin does become slightly more brittle (and hence prone to fracture). More so, the access opening that has to be made to do the root canal weakens the tooth structurally (think of a cylinder with closed ends, and then you put a hole through one end into the hollow center)... hence again root canal teeth being more fragile. And as mentioned, the root canal is often done because of prexisting factors such as large amount of decay or trauma. Therefore, a crown is often highly recommended to reinforce what is left. Much better than having the tooth fracture straight down the root (which I have seen quite often with uncrowned root canaled teeth) and then having to be pulled because you can't fix it.
As to the tooth turning black, that often is a result of the oxidation of the materials that are used to seal the canal up after root canal treatment is performed.
And this technique of growing a new tooth? I hope people are very patient, since the process to grow a new tooth will probably take years (at least, that's how long it takes for you body to form one when you are young).
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