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In the not too distant future your teeth could potentially get a sci-fi upgrade, and it all starts with the hardest stuff in your body.

Tooth enamel is actually stronger than bone, making it the toughest biological material we have. Enamel and bone share the same secret weapon: a mineral called hydroxyapatite.

Hydroxyapatite is a crystal made from calcium and phosphorus that gives teeth and bones their incredible strength and structure.

The first breakthrough came from Japan, where researchers reimagined what toothpaste can do. Instead of just protecting teeth, this NASA-spinoff toothpaste was designed to actively repair microscopic damage in enamel. It works by depositing hydroxyapatite crystals in tiny cracks, effectively rebuilding weakened enamel from the inside out.

In the future, this could mean readily available, fluoride-free toothpaste in the US that slows cavities, strengthens teeth, and reduces the need for fillings.

The second discovery takes enamel repair even further with a new protein-based gel developed by researchers in the UK. The goal of this study was to restore damaged enamel without fluoride by copying how enamel naturally grows in infancy.

When applied, the gel acts as a scaffold, pulling calcium and phosphate from saliva and guiding crystal growth through a process called epitaxial mineralization. The application is similar to brush-on fluoride treatments you get at the dentist.

What results is a newly grown mineral that integrates seamlessly with natural enamel, filling holes and cracks while restoring normal structure. This applies regardless of the level of tooth erosion, which is a key breakthrough! Tests showed this regenerated enamel holds up to brushing, chewing, and acidic foods just like healthy teeth. 

Together, these discoveries point toward a future where dentists may regrow enamel instead of drilling it away. In other words, you might not just be cleaning your teeth—you could be rebuilding them too!

More research is needed to see how the gel behaves in clinical trials, but this is a great example of how we can gain knowledge from asking the right questions and putting in the work! 

A friendly reminder, that the tooth is out there.