O.P.G and Lateral Cephalogram

What is an OPG?

X-rays use radiation to take pictures of bones and other parts inside the body. An OPG is a panoramic X-ray of the upper and lower jaws, including the teeth. The OPG unit is specifically designed to rotate around the patient’s head during the scan. An OPG will take approximately 20 seconds.

An OPG can be used to look for

  • Fractures
  • Dislocated jaw
  • Infection
  • Dentition (teeth)

It can also be used for surgical planning.

Benefits of an OPG

  • Painless, fast and easy
  • No radiation is left in your body after the OPG is finished

An orthopantomogram (OPG) is a panoramic X-ray of your teeth.

The X-ray machine rotates around your head, resulting in a picture which shows your teeth in a flat line.  The image can also provide some information about your lower face, jaw and TMJs (temperomandibular joints).

A lateral cephalometric radiograph (Lat Ceph) is an X-ray that provides a side view of your face and jaw.  This image includes soft tissue detail such as the chin and tip of nose.  With the aid of a ruler superimposed on the picture, measurements can then be made when planning orthodontic work.

Extraoral Radiographic Views:

Placing the photographic film or sensor outside the mouth, on the opposite side of the head from the X-ray source, produces an extra-oral radiographic view.
A lateral cephalogram is used to evaluate dentofacial proportions and clarify the anatomic basis for a malocclusion, and an antero-posterior radiograph provides a face-forward view.

Lateral cephalometric radiography

Lateral cephalometric radiography (LCR) is a standardized and reproducible form of skull radiographytaken from the side of the face with precise positioning. It is used primarily in orthodontics and orthognathic surgery to assess the relationship of the teeth to the jaws, and the jaws to the rest of the facial skeleton. LCR is analyzed using cephalometric tracing or digitizing to obtain maximum clinical information
Indications of LCR include:
⦁ Diagnosis of skeletal and/or soft tissues abnormalities
⦁ Treatment planning
⦁ Baseline for monitoring treatment progress
⦁ Appraisal of orthodontic treatment and orthognathic surgery results
⦁ Assessment of unerupted, malformed, or misplaced teeth
⦁ Assessment of upper incisor root length
⦁ Clinical teaching and research

Panoramic Films:


       A panoramic film, able to show a greater field of view, including the heads and necks of the mandibular condyles, the coronoid process of the mandible, as well asthje nasal cavity and the maxillary sinuses.

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