Although I haven't personally tried it, I have friends outside of the US that rave about Sensodyne Repair & Protect original with the "Powered by NovaMin" badging. NovaMin is composed of special ceramic particles that coat the teeth with a compound that reacts with the saliva to form a durable physical barrier.
The problem is that the stuff with NovaMin is not typically available in the US. I just searched Amazon and found that they do sell small tubes of the real thing for about $14 each. Looks like it is coming from Canada.
The problem is that the stuff with NovaMin is not typically available in the US. I just searched Amazon and found that they do sell small tubes of the real thing for about $14 each. Looks like it is coming from Canada.
https://www.amazon.com/Sensodyne-Protect-Whitening-Toothpast...
Here is a 2013 article:
https://ceramics.org/ceramic-tech-today/biomaterials/gsk-dro...