Orthopantomogram (OPG)

An Orthopantomogram (OPG) is a wide-view panoramic radiograph that displays both the upper and lower jaws, all teeth, the temporomandibular joints and nearby sinuses on one continuous image. It is produced by a rotating X-ray unit that moves around the head, producing a quick examination with relatively low radiation compared with taking multiple intraoral films.

Dentists and oral surgeons use an OPG to evaluate tooth development and eruption, locate impacted or missing teeth, assess wisdom teeth, screen for cysts, tumours, bone changes, fractures and extensive infection, and to help plan orthodontic treatment, extractions and implant placement. Because an OPG is a two-dimensional overview, it may not show fine root detail or complex bone anatomy, and additional imaging such as periapical radiographs or cone beam CT may be requested when more detail is needed.