Scientists Find discovery of Genes That Shape People's Teeth.
Daniel Molinos
Ever wondered why your teeth are shaped the way they are? Researchers identified 18 genes that influence tooth development, including 17 that had not previously been connected to dental traits. Researchers analyzed data from around 900 volunteers in Colombia, all of whom had a mix of European, Native American, and African ancestry, using 3D scans to measure tooth crowns and compare those measurements with people's genetics. Researchers also found a gene variant likely inherited from Neanderthals that came from interbreeding with early humans. This gene was mainly found in people of European ancestry and is associated with thinner incisors, which are the front teeth you use to bite into food. Researchers also discovered the gene EDAR, typically found in East Asian populations, which is known to influence tooth width. With that information, the study also showed that people of European ancestry tend to have smaller teeth overall. Researchers are still not sure if these genes were selected during evolution, but the findings help researchers gain a better understanding of human evolution. This research also has potential medical benefits, since some genes responsible for normal differences in tooth size can also contribute to dental problems. This research may help dentists use genetics to diagnose dental issues or potentially develop gene therapies to treat their patients.
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