Australian scientists have emerged with the technique as to how the world's oldest filling must have been done, after analyzing the jaw of a 6,500-year-old human. They suggested that tooth was capped using beeswax.

The jaw was discovered from a cave wall in northern Slovenia, which is a richest archaeological site. A team of international researchers from the University of Wollongong and the Australian Nuclear Science and Technology Organisation deployed several techniques and technologies to date the teeth.

This lower portion of jaw included two premolars, initial two molar and a broken canine, which was filled using the beeswax. The analytical methods were not only used to estimate how old the teeth were but also to date the beeswax.

After examining the thickness and size of the jaw and using the radio carbon dating, it was believed that it must be of a male in his late 20s. The male was suggested to have survived during the New Stone Age, longing back between 6440 and 6650 years.

Researchers said, "Detailed CT images of the canine tooth reveal the deep crack exposed the tooth's dentine. The exposed tissue and chewing on a cracked tooth probably made it highly sensitive".

The sensitivity must have hindered with the functioning of the jaw, as a result of which, it might have been capped with beeswax.