Wisdom Teeth

Wisdom Teeth: Why does the wisdom molar come out in humans only after becoming an adult?

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It takes time for a person to become mature. In an attempt to understand the processes of human evolution, our scientists have found that only chimpanzees resemble humans. But they also have one thing different. Their entire teeth are soon fully developed, whereas this does not happen with human teeth. The Wisdom Teeth of a human come out after the passage of a lot of age. The emergence of this molar is closely related to the origin of humans. In a new study, researchers have been able to prove this point.

Researchers from the University of Arizona in the US have done this study. The lead author of this research, anthropologist Helska Gowka, says that the exact combination of the development of wisdom teeth and the history of life was a mystery in the biological evolution of humans. Glowaca studied individual human skulls with the help of anthropologist Gary Schwartz of the University of Arizona’s Institute of Human Origins. By creating 3D models of the bones and teeth of 21 species, the researchers found that the development of wisdom molars is closely related to the biomechanics of the skull.

When Wisdom Teeth comes?

The adult teeth of humans used to chew food and make a paste come out in three stages that work around the age of 6, 12, and 18 years. Whereas in other primates, the Wisdom Teeth comes first. Like in chimpanzees, it comes up to 3, 6, and 12 years. In yellow baboons, it becomes fully developed only by the age of one year. On the other hand, the thesis develops in macaques only at the age of six years. The location of the teeth is also a factor in the reasons for this difference in time.

There is not much space in the mouth of a human. Wisdom teeth are a big problem for our species. But this is not the reason why these molars develop so late in our lives. In the act of chewing, the teeth and the muscles and bones play a role so that enough pressure is created and the food can be broken and chewed.

Our jaws develop slowly

Schwartz explains that our jaws develop slowly due to our quiet life and small face, slow development of safe space. Due to this, our wisdom teeth started coming out very late. In primates, the wisdom molar emerges just in front of the two temporomandibular pairs. It forms the joint between the jaw and the skull. Unlike other joints of our body, it is necessary to coordinate the centripetal points so that the transfer of force can occur properly. In the case of chewing food, this happens at many points.

In biomechanics, this three-point process is determined by the principles of the Constraint Level Model. By placing the teeth in the wrong place, the force can be harmful to the jaws. Skulls in species with longer jaws take less time to develop the correct structure near the muscles for the right teeth. The human face is flat, so this does not happen to him, and it takes time for his wisdom molars to develop.

This has given us new ways of developing the position of teeth. But it will also help zoologists understand the evolution of specialized human jaws in our ancestors. Glovaca says that this study gives us a new way to understand the relationship between teeth and jaw development. This study is published in Science Advances.