I have some blood tests quarterly for years which show the vitamin D level. It goes much lower each fall and winter. Now it doesn't. It stays consistently higher. Thankyou. I do take magnesium and many others minerals. A couple of years ago I went way low in Boron and caused tooth decay "wildfire" as my dentist called it.. I had to have all the top teeth out.
Yes the boron mentioned on the first page of this thread enhances the body's ability to use calcium, magnesium, as well as vitamin D.
One other nutrient that has a great impact on teeth is zinc. Here is info on zinc and oral health. In the oral cavity, zinc is found in saliva, dental plaque and in the hydroxyapatite of the dental enamel. It contributes to healthy teeth formation. Clinical trials have demonstrated that zinc ions decrease the rate of enamel demineralization
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7230687/ Even with taking zinc there may be other things such as reducing pro inflammatory cytokines at the same time which would otherwise bring zinc into the cell and not just reduce its uptake/absorption so becomes a big problem during chronic inflammation and infection. Checking inflammation markers like c-reactive protein may point then to this being involved.
Another nutrient for teeth was magnesium which also is involved with vitamin D. a number of studies have now established that it is magnesium, not calcium, that forms the kind of hard enamel that resists decay. And no matter how much calcium you take, without magnesium only soft enamel can be formed. If too soft the enamel will lack sufficient resistance to the acids of decay.
For years it was believed that high intakes of calcium and phosphorus inhibited decay by strengthening the enamel. Recent evidence, however, indicates that an increase in these two elements is useless unless we increase our magnesium intake at the same time, It has even been observed that dental structures beneath the surface can dissolve when additional amounts of calcium and phosphorus diffuse through the enamel at different rates. Thus milk, poor in magnesium these days for the most part, but high in the other two elements, not only interferes with magnesium metabolism, but also antagonizes the mineral responsible for decay prevention.
https://www.mgwater.com/rod10.shtml