The New Tooth Regrowth Breakthrough Happening in London

Summary

The video describes two emerging approaches to dental regeneration: helping a damaged tooth repair itself and growing a replacement tooth from engineered cells. Both are presented as research in progress, not as established treatments available in routine dentistry.

1. Encouraging a damaged tooth to repair itself

• When decay reaches the dentin, teeth can respond by forming tertiary dentin, a protective layer produced by cells called odontoblasts.
• The video describes a biological “brake” involving GSK3 that limits this natural repair process.
• Researchers in London are investigating whether the small molecule tideglusib can inhibit that brake and encourage additional dentin formation.
• The approach uses a small, biodegradable sponge soaked in the molecule:
  1. The sponge is placed in the cavity.
  2. The pulp is stimulated to produce additional dentin.
  3. The sponge dissolves, leaving the newly formed dentin structure.
• The proposed advantage over a conventional filling is that new dentin could create a more continuous, biologically integrated repair. The narrator contrasts this with fillings, where a microscopic boundary between the filling material and the tooth may allow bacteria to enter and contribute to recurrent decay.

2. Engineering a replacement tooth

• Growing a whole tooth is more complex than repairing dentin. Tooth development depends on different stem-cell tissues receiving the right signals at the right stages.
• The video says that providing all the signals at once can produce disorganized mixtures of tooth and bone rather than a functional tooth.
• London researchers are described as using a complex hydrogel containing growth signals. It acts like a conductor, giving cells staged instructions so they can communicate and develop in sequence.
• This work aims to create dental organoids, or tooth buds, that could potentially be placed in the jaw.
• A major remaining challenge is developing a lab-grown structure into a functional tooth in an adult jaw. It would need a blood supply and nerve connections, and would have to erupt in the correct position and alignment.

3. Research elsewhere

The narrator briefly mentions related work in Japan, China, and at Harvard. The video specifically says that Toregem BioPharma in Japan has entered Phase 2 trials for a tooth-regrowth approach. It does not provide detailed findings about the other projects.

Speakers and sources featured

• Narrator/presenter: An unnamed dental commentator who explains the research.
• London researchers: Described as working on dentin repair and lab-grown tooth development; no individuals or institutions are named in the subtitles.
• Toregem BioPharma (Japan): Mentioned in connection with Phase 2 tooth-regrowth trials.
• Researchers in China and at Harvard: Mentioned as working on related advances, without further detail.