Methods to prevent tooth decay were investigated and documented in Sweden back in the 30's and 40's. Studies were carried out at a mental hospital where patient

Methods to prevent tooth decay were investigated and documented in Sweden back in the 30's and 40's. Studies were carried out at a mental hospital where patients were force fed sugary sweets to provoke caries. I believe fluoridation was one of the things found to help prevent caries. https://en.wikipedia.org/wiki/Vipeholm_experiments https://en.wikipedia.org/wiki/Vipeholm_experiments