Representational image
For many people, losing a tooth affects not only oral health but also confidence, appearance, and overall quality of life. Traditionally, individuals with missing teeth have relied on dentures, bridges, or dental implants. However, scientists in Japan are now exploring a revolutionary alternative — the possibility of naturally regrowing human teeth.
Researchers at Kyoto University Hospital have begun clinical trials of an experimental drug called TRG-035, which aims to stimulate the growth of new teeth by activating the body’s natural tooth-forming mechanisms.
Regenerative Dentistry Opens New Possibilities
The innovation falls under the emerging field of regenerative dentistry, which focuses on biologically restoring teeth instead of replacing them with artificial substitutes.
Scientists developed TRG-035 to target a protein known as USAG-1, which normally suppresses the formation of additional teeth after adulthood. By inhibiting this protein, researchers hope to activate dormant tooth buds and encourage the growth of a new set of teeth.
According to a 2021 study published in the National Library of Medicine, blocking USAG-1 could potentially allow humans to grow extra teeth beyond the two natural sets developed during childhood and adolescence.
The treatment is administered through intravenous injection.
Experts Call the Approach Promising
Angray Kang, Professor at Queen Mary University of London, described the approach as highly promising and innovative. However, he noted that significant time and further research would still be required before the technology becomes widely available.
Animal Studies Show Encouraging Results
Before moving to human trials, scientists tested the drug extensively on animals, including mice, ferrets, and dogs.
Researchers observed successful tooth growth in mice without serious adverse effects. Similarly, ferrets developed new teeth after receiving the treatment. Scientists consider ferrets particularly important for such research because their tooth development closely resembles that of humans.
In addition, dogs also showed successful tooth regrowth during testing. Researchers believe that the consistent outcomes across different species strengthen the possibility that the treatment could work in humans as well.
Human Clinical Trials Focus on Safety
Kyoto University Hospital has currently enrolled 30 participants between the ages of 30 and 64 who have one or more missing teeth.
At this stage, researchers are primarily focusing on evaluating the safety of TRG-035 rather than its effectiveness. Scientists administered limited doses of the drug to participants and carefully monitored their responses.
As reported by TOI, the team is also studying how the medication behaves inside the human body and determining the optimal dosage required for future treatment.
Furthermore, upcoming phases of the clinical trials will examine the drug’s effects on individuals with congenital dental disorders that affect normal tooth development.
Tooth Regeneration Could Transform Dental Care
If successful, the technology could significantly transform modern dentistry. Currently, treatments for missing teeth often involve surgical procedures, prosthetics, or implants, all of which may carry certain risks and limitations.
In contrast, regenerated biological teeth could naturally integrate with the jawbone and surrounding tissues, potentially offering a more durable and personalised solution.
Dr. Chengfei Zhang described the innovation as potentially revolutionary for dental care. However, he emphasised the need for additional research to ensure the treatment’s safety and effectiveness across diverse populations.
Scientists Continue to Address Key Challenges
Despite the excitement surrounding the research, scientists still face several important challenges before the treatment can reach the public.
Researchers must ensure that newly formed teeth grow correctly and align properly within the mouth. In addition, regulatory approval from agencies such as the United States Food and Drug Administration (FDA) will require extensive clinical evidence demonstrating both safety and long-term benefits.
Ethical considerations and informed consent also remain critical aspects of the development process.
Public Availability May Still Take Several Years
Scientists believe the treatment may take several more years to become commercially available. Some projections suggest that, if future clinical trials prove successful, tooth regeneration therapy could potentially reach the public by 2030.
If realised, the concept of naturally regrowing teeth could mark a major breakthrough in regenerative medicine and reshape the future of dental healthcare worldwide.
AloJapan.com