Chapter-29 Orthopantomography

BOOK TITLE: Fundamentals of Oral Medicine and Radiology

1. DN Bailoor
2. Keerthilatha Pai
3. B Balaji Rao
Publishing Year
Author Affiliations
1. Yenepoya Dental College and Hospital, Mangalore
2. Manipal College of Dental Surgery, Manipal
3. KLE Institute of Dental Sciences, Bangalore
Chapter keywords


The term Pantomography is derived from the word Panorama ‘an unobstructed view of a region in every direction’; Tomography the Greek word meaning “X-ray technique for making radiographs of layers of tissue in depth, without the interference of tissue above and below that level”. Panoramic radiography does not replace the conventional dental film, but when used as a supplemental aid, it produces a comprehensive radiographic survey never before realized by the dentist. Three different methods have been used in panoramic radiography: in one method, intraoral source of radiation is used to project on to the film positioned on the patient’s face (Reverse-radiography based on Microfocus Principle), in another method, the source of radiation and the film are positioned extraorally (Rotational Panoramic Radiography) and in the third the latest CCD sensor technology makes it possible to have digital images recorded in the computer and displayed on the Visual Display Unit. More and more tertiary level hospitals are going for the digital and filmless imaging systems. OPG view has become more or less a standard view when there is any trauma, large swelling or suspected tumor in any part of the upper and lower jaws. ENT and general physicians are increasingly looking towards this technique as a quick review technique. The midline shadows in the mandible are still not very sensitively visualized since the spine shadow still poses a definite irritation. The space between tongue and the palate also can be a distraction to a new clinician. Keeping in mind the limitations of this curved surface tomographic view it is possible to utilize the knowledge obtained from rationally for treatment planning.

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