Experts from the University of Heidelberg (Germany) analyzed data collected in 2013 from 35,000 people aged 50 and older in 14 European countries and Israel.
We brush our teeth every day, but not everyone has the habit of cleaning the tongue during oral hygiene.
Permanent teeth or wisdom teeth can all be used to develop into a fully functional tooth.
Research in 273 subjects aged 55 and over, the scientists found a relationship between the number of natural human teeth and the performance of memory tests.