Oral Radiography DENT-120
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| Ghost Image | image on opposite side, magnified, higher position than the real image | have patient remove all dense objects from the head and neck region
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| Lead apron artifact | radiopaque cone shaped artifact, or a bilateral radiopaque artifact that obscures the mandible | lead apron without thyroid collar
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| Position of lips and tongue | if not closed on the bite block, dark radiolucent shadow obscures anterior teeth. If the tongue is not positioned at the roof of the mouth, dark radiolucent shadow obscures maxillary teeth | close lips around bite block, raise tongue to palate
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| chin tipped up | frankfort plane is angled upward: condyles may not be visible, hard palate may appear superimposed over the roots of maxillary teeth, max incisors may be blurred or magnified. Smile line curved downward | frankfort plane passes from the bottom of the eye socket through the top of the ear canal
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| chin tipped down | condyles are positioned higher on the image, hyoid bone forms single widened line, mandibular incisors appear blurred, roots may appear short, exaggerated smile line appears | frankfort plane parallel to the floor
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| teeth anterior to focal trough | anterior teeth appear narrow and out of focus on the image. Pronounced overlap of the premolars may be seen | teeth end to end and positioned in the groove of the bite block
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| Teeth posterior to the focal trough | teeth appear blurred and widened. roots of anterior teeth may appear to be cut off | teeth positioned in the groove on the bite block
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| head turned | ramus and posterior teeth on one side of the image appear larger than those on the other side. | midsaggital plane is perpendicular to the floor and midline centered on teh bite stick
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| slumped posture | cervical spine appears as a radiopacity in the center of the image and obscures diagnostic information | ask patient to sit or stand 'as tall as possible" or 'step forward slightly closer to the machine
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SonyaP
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