Developing Skill and Expertise in the Use of Panoramic Radiography

Developing Skill and Expertise in the Use of Panoramic Radiography Developing Skill and Expertise in the Use of Panoramic Radiography

28.12.2014 Views

5/13/2013 Head Twisted: One side of the mouth is magnified and ramus is distorted, more of the spine appears on one side of film Frankfort Plane: • An imaginary line from the floor of the orbit (eye) to the external audiology meatus. • Should be parallel to the floor Controls chin positioning (high/low) Ala-Tragus Line • *An imaginary line from the ala of the nose to the external auditory meatus Controls chin positioning (high/low) 5

5/13/2013 Common Positioning Requirements: Bite Block Anterior teeth should be positioned in the proper groove(s). Common Positioning Requirements: Bite Block • Biting too far forward: • Anterior teeth appear narrow and smaller • The spine appears in radiograph • Biting too far back: • Anterior teeth appear widened and blurred • Condyles of mandible are not visible Common Positioning Requirements: Bite Block • Biting too far forward: • Anterior teeth appear narrow and smaller • The spine appears in radiograph • Biting too far back: • Anterior teeth appear widened and blurred • Condyles of mandible are not visible Courtesy of Mosby, Inc., Elsevier Pub, 2009.. 6

5/13/2013<br />

Head Twisted: One side <strong>of</strong> <strong>the</strong> mouth is magnified <strong>and</strong> ramus<br />

is distorted, more <strong>of</strong> <strong>the</strong> sp<strong>in</strong>e appears on one side <strong>of</strong> film<br />

Frankfort<br />

Plane:<br />

• An imag<strong>in</strong>ary l<strong>in</strong>e from<br />

<strong>the</strong> floor <strong>of</strong> <strong>the</strong> orbit<br />

(eye) to <strong>the</strong> external<br />

audiology meatus.<br />

• Should be parallel to<br />

<strong>the</strong> floor<br />

Controls ch<strong>in</strong> position<strong>in</strong>g<br />

(high/low)<br />

Ala-Tragus L<strong>in</strong>e<br />

• *An imag<strong>in</strong>ary l<strong>in</strong>e from<br />

<strong>the</strong> ala <strong>of</strong> <strong>the</strong> nose to<br />

<strong>the</strong> external auditory<br />

meatus<br />

Controls ch<strong>in</strong> position<strong>in</strong>g<br />

(high/low)<br />

5

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