Imagine a future where losing a tooth doesn’t mean implants, bridges, or dentures — your body simply grows a new one. That future is one step closer, thanks to groundbreaking research coming out of Japan.
Researchers at Kyoto University Hospital, in collaboration with startup Toregem Biopharma, have begun the world’s first human clinical trials for a drug designed to regenerate natural teeth. The experimental treatment, known as TRG-035, targets a specific protein called USAG-1 (uterine sensitization-associated gene-1), which acts like a natural “brake” on tooth development after your adult teeth come in.
How It Works
Humans actually have the biological blueprint for a potential “third set” of teeth — dormant tooth buds that never fully develop. By blocking USAG-1 with a monoclonal antibody delivered via intravenous injection, the drug aims to reactivate these buds and trigger new tooth growth.
In earlier animal studies, the approach delivered impressive results: mice and ferrets with missing teeth grew fully functional new ones, complete with roots and the ability to chew normally. No major safety issues were reported in those preclinical tests.
https://www.kyoto-u.ac.jp/en/research-news/2021-03-31
Current Trial Details
The Phase 1 trial, which started in late 2024, involves 30 healthy Japanese men aged 30 to 64, each missing at least one molar. The primary goal at this stage is to evaluate safety and determine proper dosing. Researchers are closely monitoring participants for any side effects while watching for early signs of tooth regeneration.
If successful, the next phases could expand to include children with congenital tooth agenesis (a condition where people are born missing one or more permanent teeth). The team hopes to have a viable treatment available by around 2030.
Tooth Loss Affects Millions of People Worldwide
Tooth loss affects millions of people worldwide, impacting not just smiles but also nutrition, speech, confidence, and overall health. Current solutions like implants are effective for many but involve surgery, cost, and time — and they aren’t always an option for everyone.
A regenerative approach like TRG-035 could transform dentistry from replacement to true regeneration. Dr. Katsu Takahashi, the lead researcher whose team has pursued this for nearly three decades, has called it a potential game-changer for both congenital conditions and general tooth loss.
What’s Next?
While it’s still early days, the excitement in the scientific community is palpable. Positive results from these safety trials could accelerate development and open the door to broader applications.
At practices like ours, we stay on top of emerging technologies because patient care evolves quickly. This kind of innovation reminds us why ongoing research in oral health is so exciting — it holds the promise of even better, more natural solutions down the road.
Would you grow a new tooth if science made it possible? Share your thoughts in the comments! In the meantime, maintaining excellent oral hygiene and regular dental check-ups remains the best way to protect the teeth you have.
Sources include Kyoto University research updates and clinical trial reports.
Judy Chau, D.D.S., dentist in San Rafael