The history of dentistry is almost as ancient as the history of humanity and civilization with the earliest evidence dating from 7000 BC to 5500 BC. Skeletal remains from Mehgarh dated to that time show evidence of teeth having been drilled with flint tools to remove decay, a method found to be "surprisingly effective". Dentistry is thought to have been the first specialization in medicine. The modern movement of evidence-based dentistry calls for the use of high-quality scientific evidence to guide decision-making.