Orthopantomogram
Pronunciation: or-thoh-pan-TOM-oh-gram
Also written as: OPG — Orthopantomogram
A panoramic extraoral radiograph that produces a single, flat image of the entire dentition, jaws, temporomandibular joints, and surrounding structures.
Full Definition
An orthopantomogram (OPG) is a type of panoramic radiograph produced by a rotating X-ray source and detector that moves around the patient's head, capturing all teeth, the mandible, maxilla, temporomandibular joints, and adjacent osseous structures in one image. It is a cornerstone extraoral imaging modality in dentistry, used for treatment planning, orthodontic assessment, implant evaluation, and pathology screening. The term is often abbreviated as OPG in clinical and editorial contexts; however, the full term should appear on first reference in formal documents. Editors should note the correct spelling — 'orthopantomogram' — and not confuse it with 'orthopantomograph,' which refers to the machine itself. The plural is 'orthopantomograms.'
Usage
Usage note: Spell out 'orthopantomogram' on first reference before using the abbreviation OPG. Do not confuse with 'orthopantomograph,' which refers to the machine, not the image.
In Context
- "An orthopantomogram was obtained prior to surgical extraction of the impacted mandibular third molars." — Oral surgery referral letter
- "The orthopantomogram revealed generalised horizontal bone loss consistent with chronic periodontitis." — Periodontal assessment report