The World – Science and Technology
A study by American scientists found that a substance in the teeth, called “cementum”, developed a new layer every year.
A study of subtle changes in their growth can provide key details such as when a woman was pregnant, or information about serious diseases.
The results showed that the skeleton is not a fixed member, but is constantly changing, according to researchers in the study.
The researchers examined approximately 50 human teeth, ages 25 to 69, drawn from a structural group with known medical history and lifestyle data.
This included details such as age, disease, and movement, for example from urban to rural environments, with much of this information obtained from the relatives of the people.
The researchers then used a series of imaging techniques that illuminated the “mortar” rings.
The researchers tested whether the important events in a person’s life could have a noticeable effect on the composition of the substance. They also found that the main events in a person’s life can be timed using dental rings.
Physiologically important events, such as pregnancy, menopause and systemic diseases, leave permanent changes in the exact structure of the “slurry.”
“Just like tree rings, we can look at” tooth rings, “which are the ever-increasing layers of tissue on the surface of the tooth root. These rings are a faithful archive of experiments,” said Paula Cerrito, PhD student at NYU. The individual’s physiology, stress from pregnancy, and diseases that all leave a distinctive permanent mark. Age adjusts and constantly responds to physiological processes. “
The study, published in Scientific Reports, focused on “slurry” tissue, which is tooth tissue covering the molar root, while growing reliably.
From the moment the tooth appears in the mouth, it begins to form annual layers that resemble tree rings.