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South Korea developed a patch that regrows teeth — ending dentures forever 🦷
Scientists at Seoul National University have created a microneedle patch that stimulates dormant tooth stem cells to regenerate enamel and even grow entirely new teeth in adult humans. The patch contains a drug called tideglusib combined with growth factors that activate dental stem cells still present in the jaw.
Clinical trials showed remarkable results:

Small cavities completely healed in 4-6 weeks
Chipped teeth regrew enamel within 8 weeks
In 30% of participants, completely new tooth buds began forming
No pain, no drilling, no fillings needed

How it works: The patch is applied to the gum above the damaged tooth for 20 minutes daily. Microneedles pe*****te the gum tissue painlessly, delivering the drug directly to the tooth root where stem cells reside. The drug inhibits a protein (GSK-3) that normally prevents tooth regeneration in adults.
This could revolutionize dentistry:

3.5 billion people suffer from oral diseases
Dental tourism generates $10 billion annually
Dentures and implants cost $10,000-$40,000
Regrown teeth are genetically your own—no rejection risk

South Korea plans to commercialize the patches by 2026, pricing them at around $300 per tooth—a fraction of implant costs. The same technology might work for regrowing bone in other parts of the body.
Source: Seoul National University School of Dentistry, Science Translational Medicine 2025