Interpreting An Orthopantomogram

Interpreting An Orthopantomogram

Describe in detail technique of orthopantomography and also write its advantages and disadvantages comparing it with full mouth periapical dental radiography.
Answer.

Synonyms: Panoramic imaging or rotational radiography or pantomography.

Definition: It is a technique for producing a single tomographic image of the facial structures that induces both the maxillary and mandible dental arches and their supporting structures.

Orthopantomography Procedure

• Explain the procedure to the patient.
• Make the patient wear a lead apron and remove all objects from the head which will interfere with film exposure, e.g. ear rings, necklace, nose rings.

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interpreting orthopantomogram

• Special attntion must be paid for proper positioning of patient along focal trough area.
• Patient is instructed to look straight rather than following movement of tube.
• Patient is positioned such that dental arches are located in middle of focal trough area.
• Mid-sagittl plane is kept perpendicular to flor.

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• Patient back and spine is adjusted in erect position and the occlusal plane adjusted so that Frankfurt plane is parallel to flor done by asking the patient to place central incisor into a notched incisal device using a bite block.
• Mark on fim: Lef and right with lead marker.

Panoramic X-ray interpretation

• Center the lower border of mandible on the chin rest and is equidistant.
• Instruct the patient to position the tongue on the palate.
• After the exposure is complete, then film is subjected to routine processing.

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