The wisdom tooth your dentist pulled out and dropped in a bin may have been one of the best sources of stem cells in your body. In a 2000 paper in PNAS, Songtao Shi and colleagues at the U.S. National Institutes of Health showed that adult human dental pulp, the soft pink tissue inside a tooth, contains a population of self-renewing cells able to form bone-like tissue when transplanted into mice.1 They named them dental pulp stem cells, or DPSCs.
Twenty-five years later, those same cells, often harvested from third molars headed for the surgical tray, are being coaxed in laboratories into neurons, cartilage, blood vessel walls, and pancreatic-like tissue. None of that is standard treatment yet. The lab work is real, the early animal results are interesting, and the line between “promising” and “available at your hospital” is still long.
What is a wisdom tooth, biologically speaking?
A wisdom tooth is the third molar at the back of each side of each jaw. Most people erupt them between ages 17 and 25. In modern jaws they often arrive crooked or impacted, which is why an estimated 5 million Americans have them removed every year. From a regenerative-medicine point of view, that frequency is a feature. The tooth comes out anyway. Whatever is inside it is cargo that would otherwise go to medical waste.
What is inside is not, strictly, the cells everyone wants. The hard outer crown is enamel, dentin, and cementum. The interesting tissue is the pulp, a small core of soft connective tissue threaded with nerves and tiny blood vessels. The pulp is where DPSCs live, sitting near the small capillaries.1 Children have a similar population in baby teeth, called SHED (stem cells from human exfoliated deciduous teeth), described by Miura and colleagues in 2003.2 SHED cells share many traits with DPSCs but tend to grow faster in culture, which makes them attractive for research.
How do you get stem cells out of a tooth?
The procedure, in a research lab, is mechanical and unromantic. The extracted tooth is cleaned, cracked open, and the pulp is teased out with fine forceps. The tissue is digested with enzymes, the cells are spun down, and they are plated onto a flask with a basic growth medium. Within days, a small fraction of those cells stick, divide, and form colonies. Those colonies are the stem cells.
Once expanded, DPSCs behave like classic mesenchymal stem cells (MSCs). They self-renew. They can be pushed toward bone, fat, cartilage, and, with the right cues, neuron-like or muscle-like cells. They also share surface markers with MSCs from bone marrow and fat. A 2008 paper in Cell Stem Cell by Crisan and colleagues helped explain why dental pulp is so rich in them. The team showed that mesenchymal stem cells across many human organs originate from cells wrapped around small blood vessels, called pericytes.4 Dental pulp is densely vascularized for its size, so it carries a relatively high pericyte load. That is one plausible reason a tiny scoop of pulp can yield so many usable cells.
Can dental stem cells really turn into neurons?
This is the claim that gets the most attention, and it is also the claim where the evidence has held up best. In dishes, DPSCs and SHED can be nudged toward a neuronal fate using growth factors, retinoic acid, and chemical signals such as elevated potassium chloride to depolarize the cell membrane. The cells extend long thin processes, start producing neuronal markers like beta-III tubulin and neurofilament, and in some studies fire small electrical currents when measured with a patch clamp.
The work moved from dish to animal in 2009, when Arthur and colleagues implanted adult human DPSCs into the brains of immunocompromised chickens during early development. The transplanted cells survived, integrated, and influenced how nearby host axons grew, suggesting they were not just passive bystanders but were releasing signals that shaped the local nervous tissue.3 A 2018 paper in Cytotherapy by Zhang and colleagues went further. The team transplanted human SHED cells into the striatum of rats with chemically induced Parkinson-like motor symptoms. The treated rats showed measurable reductions in motor defects compared with controls.5
That last study is preclinical, in rats, with relatively small group sizes. It is not a human trial. But it is the kind of result that funds more work, and it explains why several research groups are now banking dental stem cells from extracted third molars for future neurological studies.
Bone, cartilage, and the dental side of the story
The least flashy use of dental stem cells is also the closest to the clinic: making bone. DPSCs were originally identified by their ability to form a bone-like, dentin-like material when transplanted into mice.1 In follow-up work, the same cells, embedded in a scaffold and seeded into a surgical jaw defect in animal models, can support new bone growth that integrates with the host. Small early human studies of jaw bone repair using autologous DPSC scaffolds have been reported, mostly out of Italian and Japanese groups, with cautious positive findings on bone density and graft survival. These remain niche procedures, not standard of care.
Cartilage is harder. Cartilage in the body has poor blood supply and limited natural repair. DPSCs can be coaxed into chondrocyte-like cells in a lab, but holding that fate stable inside a damaged joint is an unsolved engineering problem, not a stem-cell shortage. The cells are not the bottleneck.
What about the heart?
The viral version of this story claims wisdom-tooth stem cells can “repair the heart.” The careful version is gentler. In dishes, DPSCs and SHED cells can be pushed toward a cardiomyocyte-like phenotype, expressing some of the right structural proteins. In small animal studies of induced heart attack, injecting dental-derived cells near the injury appears to reduce scar size and improve pumping function in the weeks that follow. The effect is most often attributed not to the cells turning into new heart muscle, but to paracrine signaling: the cells release growth factors and small vesicles that calm inflammation and recruit the heart’s own repair machinery. That distinction matters, because it changes what the eventual treatment might look like. It might not be a transplant. It might be a purified factor cocktail or an exosome preparation.
It also matters for the regulatory story. A live cell product is treated by the FDA and its European counterparts as a different category of medicine than a bottled solution of growth factors, and it has to clear a higher safety bar. Several research groups, faced with that wall, have begun studying the secretome (the soup of proteins and tiny vesicles the cells release) instead of the cells themselves. If a wisdom-tooth-derived therapy reaches the cardiology clinic in the next decade, there is a real chance the active ingredient will be something the cells made, not the cells.
Alzheimer’s, amyloid, and where the hype gets ahead of the data
Some early reports describe dental stem cells reducing amyloid plaque in mouse models of Alzheimer’s disease, or secreting neurotrophic factors that protect dying neurons. These are mostly small, single-lab studies, often without independent replication, and the effect sizes vary. The biology is plausible. MSCs in general are known immune-modulators and can release a wide menu of signaling molecules. But “plausible” is not “proven,” and Alzheimer’s has a long graveyard of treatments that worked beautifully in mice and failed in humans.
If you read a headline saying dental stem cells “cure” Alzheimer’s, that headline is ahead of the evidence. If you read one saying they “show promise in early animal studies,” that is closer to honest.
Should you bank your wisdom teeth?
This is the practical question most people ask after reading a Facebook post like the one this article is based on. Several private companies will, for a fee, collect the extracted tooth, process the pulp, freeze the cells, and store them indefinitely on the chance you might want them later for some future therapy.
What you are paying for, in 2026, is a bet on a future that has not arrived. The cells inside a properly stored tooth do appear to remain viable for years; long-term cryopreservation of DPSCs has been reported in multiple studies. What is not clear is whether any of the therapies the marketing pages mention will be approved during your lifetime, whether they will need your own cells specifically, or whether off-the-shelf donor cells will work just as well. For most people, the cost is real and the benefit is speculative. For a family with a known genetic risk for a condition where dental stem cells are in active human trials, the math may shift. A genetics counselor or the clinical-trials registry, not the company’s brochure, is the better source.
It is not just one study
One thing the original viral post got right: this is not a single sensational paper. The body of dental-stem-cell literature now runs into the thousands of articles, with consistent findings across multiple independent labs on what these cells are and what they can do in dishes and small animals. The gap between that research and a Tuesday-afternoon hospital visit is the slow, expensive, well-regulated journey of a Phase I trial, then a Phase II, then a Phase III. That journey is happening for several conditions, including spinal cord injury, periodontal regeneration, and corneal damage. None of it is fast.
The original Power Mindset post ended with a flourish: “That tooth your dentist pulled might have more potential than anyone realized.” That is true. It has potential. Potential is not yet a treatment.
Common questions about wisdom-tooth stem cells
Are dental pulp stem cells the same as bone marrow stem cells?
They are both classified as mesenchymal stem cells and share many surface markers and abilities, but they are not identical. DPSCs tend to be more neurally inclined in lab studies, possibly because the dental pulp itself is innervated and shares developmental origin with neural crest cells.
Can adults still use their wisdom teeth for stem cells?
Yes. The original DPSC paper used adult human teeth, including third molars from young adults.1 Cell yield and proliferation rates do tend to drop with donor age, which is why some banking services emphasize collecting in your late teens or twenties.
Is wisdom-tooth stem cell therapy currently available?
Not as a routine, approved treatment for systemic conditions like Parkinson’s, Alzheimer’s, or heart attack. Some dental and oral-surgery applications, especially for jaw bone defects, are in clinical use in a few centers under research protocols.
What if my wisdom teeth were already removed and thrown away?
Then that opportunity is gone for those teeth. You still have other potential sources, including bone marrow and adipose tissue, that are commonly used for MSC-based research and clinical trials.
Is there any risk to having dental stem cells stored?
The medical risk is low. The procedure is the standard tooth extraction you would have anyway, plus a courier step. The bigger risk is financial: paying year after year for storage of cells whose future use may never come.
Where this leaves things
Dental pulp stem cells are real, well-characterized, and genuinely interesting. They are not a magic kit for repairing the brain, the heart, and the skeleton on demand. Twenty-five years of research has converted a curious finding into a serious subfield with active clinical trials in narrow indications, mainly in dentistry and orthopedic regeneration. The headline-grabbing applications, including Parkinson’s and Alzheimer’s, sit further out, supported by animal data and a handful of early-stage human studies.
If you are about to lose a wisdom tooth, you do not need to bank it to be a healthy person. If you find the science interesting, the honest move is to follow the trials registry, not the marketing.
Sources
- Gronthos S, Mankani M, Brahim J, Robey PG, Shi S. Postnatal human dental pulp stem cells (DPSCs) in vitro and in vivo. Proceedings of the National Academy of Sciences of the United States of America. 2000. PubMed: 11087820
- Miura M, Gronthos S, Zhao M, Lu B, Fisher LW, Robey PG, Shi S. SHED: stem cells from human exfoliated deciduous teeth. Proceedings of the National Academy of Sciences of the United States of America. 2003. PubMed: 12716973
- Arthur A, Shi S, Zannettino AC, Fujii N, Gronthos S, Koblar SA. Implanted adult human dental pulp stem cells induce endogenous axon guidance. Stem Cells. 2009. PubMed: 19544412
- Crisan M, Yap S, Casteilla L, Chen CW, Corselli M, et al. A perivascular origin for mesenchymal stem cells in multiple human organs. Cell Stem Cell. 2008. PubMed: 18786417
- Zhang N, Lu X, Wu S, Li X, Duan J, et al. Intrastriatal transplantation of stem cells from human exfoliated deciduous teeth reduces motor defects in Parkinsonian rats. Cytotherapy. 2018. PubMed: 29576501
