history began more than 100 years ago. In the field of dentistry, crude devices by today' s standards were developed in the late 19th century to evaluate the density of the bone in the mandible. The advances in technology continued, albeit slowly, for the first half of the 20th century, gaining some speed in the 1960s and 1970s. The introduction of dual-energy X-ray absorptiometry in the late 1980s truly opened the door to clinicians' offices for bone densitometry. In the last 10 years, the advances in technology and the introduction of new machines of various types has occurred with almost blinding speed compared with the pace of.
