Did you know that teeth are given to us not only to chew food? In the new study, American scientists have found that teeth can tell about the key moments of our lives. For example, examining the composition of the teeth of any person, the researchers can find out if he has children, if he sat in jail and went far from my hometown. And all because of covering the roots of our teeth the bone tissue called the cement reacts strongly to all serious changes in our lives and in response changes its composition. This researchers found in a study of the teeth 15 of the dead people about whom said their relatives and friends.
Cement is the bone that covers the lower part of the teeth of humans and animals. It protects the teeth from damage and gives strength to the teeth and involved in the recovery of damaged areas.
In scientific work the researchers studied 47 teeth taken from dead 15 people aged 25 to 69 years. Scientists chose this group of people because the relatives of the detail recounted their life story. As in contrast to other component parts of the teeth, the cement grows throughout a person’s life, researchers decided to study this bone tissue. In their view, various emotional shocks had to leave on the teeth of people with at least some traces.
Why we need teeth?
The authors were absolutely right. People who suffer from serious diseases, was serving a prison sentence or have moved from the countryside to the city, the structure of the cement was uneven. Studying the lower part of the teeth of dead people under a microscope, the scientists noticed that, throughout a person’s life, the cement forms a new layer. So human teeth are somewhat similar to the trunks of trees, which over time formed the so-called annual rings. Considering the number of them to cut down the tree, you can find out his exact age.
Annual rings are formed on the trunks of trees every year. In fact, it is the response of plants to climate change . In winter, the trees practically grow on their trunks formed a thin ring of dark color. Spring, summer and autumn the trees are active and their trunks formed a wide and bright ring. Counting each pair of these rings, it is possible to know the age of the tree.
Unfortunately, the researchers did not specify which traces are left on the teeth certain life events. It is logical to assume that changes in the structure of cement in pregnancy are very different from the changes happening with the bone while serving a prison term. However, the head of research Paolo Cerrito noted that their research proves that teeth are not “dead” body parts that are only needed for chewing food.
From now on we can assume that the teeth are kind of “memory” that records key moments in the life of every person. If scientists can figure out exactly what changes in the structure of cement occur when certain life situations of the person, they will be able to develop a technology for the recovery of biographies of people. In the meantime, we can only say that if dental “annual rings” of a person no significant changes, so that his life was quite calm. But if changes are many, the man has clearly lived a full life that was rich in stress and trouble.
How to know the biography of man?
In the long term, this discovery may help the archaeologists to recover the biographies of people who lived hundreds of years ago. Or new technology could be applied forensics. Just imagine — somewhere in the forest was found the dead body of a man about which nothing is known. The experts will be able to examine his teeth under a microscope and to know what life events he encountered. Comparing these data with the biographies of the missing people, they can identify the person.