If the patient's lips are not closed on the bite-block during the exposure of a panoramic film, a ____ shadow results that obscures the anterior teeth.

Name: If the patient's lips are not closed on the bite-block during the exposure of a panoramic film, a ____ shadow results that obscures the anterior teeth.
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Question

Quizplus · Accepted Answer

The dark radiolucent shadow is caused by the open mouth, which allows the X-rays to pass through the air and create a dark area on the film.

If the Patient's Lips Are Not Closed on the Bite-Block