Shared from  Dental Hygiene with Kara RDH

Today were taking it back 9,000 years ago to the ancient Indus Valley civilization (present day India and Pakistan). Mehrgarh, a neolithic site in Pakistan, is one of the earliest sites with evidence of farming, herding, and drilling on teeth.

Archeologists have found drill holes in molars of both lower and upper jaws and thus are not likely to have been done for decorative purposes. The dental techniques have only been discovered on about .3% of the population (11 teeth out of a total of 3880 examined from 225 individuals studied to date), so it seems to be a rare occurrence.

Flint drill bits are known from Mehrgarh, long associated with the bead industry there. Researchers conducted experiments and discovered that using a flint drill bit attached to a bow-drill, it required under a minute to produce similar holes in human enamel.

The bow drill example is an Eskimo drill from the early 20th century, the Neolithic bow would be very similar. The second picture is tooth 15: light microscopy showed the holes were conical, cylindrical or trapezoidal in shape.