Enamel can be worn away by abrasion, decay or teeth-grinding, and it can't be repaired by natural processes as it's the only non-living tissue in our bodies. In recent years, the rise in peroxide-based dental whitening products has exacerbated the issue of enamel wear. The only way to treat dentin hypersensitivity currently is to treat the symptoms. But researchers at the University of Washington have developed a novel treatment that can rebuild lost tooth minerals, offering a permanent fix to the problem of dentin hypersensitivity.