In Italy archeology found the ancient seal. According to experts, their age could be around 12 thousand years.
Scientists said that the ancient seals were made of bitumen, resembling resin. Despite this, he had a more dense structure, which is in an inert state by strength was the same stone. Even then, to install the seals used metal tools.
Ancient fillings perform the same function as the modern. Due to the fact that they are embedded in the teeth in a molten form, they are also densely covered with enamel, not perceiving the external stimuli to nerve endings.
The specific chemical composition were also allowed to get rid of the risk of developing infections in the oral cavity. An archaeologist from the University of Bologna Stefano Benassi noted that this finding is special, as discovered fillings different from the ancient counterparts.
They can hardly use it now since the installation process itself was very painful. Previously the world’s oldest fillings have been artifacts found in Slovenia. Their age was approximately 6.5 thousand years.