DANB RHS Patient Positioning Questions

If the patient’s midline is tilted during a maxillary central incisor periapical exposure, what is the most likely error?

C. Midline structures appear asymmetrical

The patient’s chin is tipped too far down during a mandibular premolar PA. What happens?

B. Roots foreshortened

A bitewing receptor is positioned too far lingual in a maxillary premolar bitewing. What error occurs?

A. Overlapping contacts

Patient’s chin tipped too far up for a mandibular incisor PA. Result?

A. Roots elongated

A patient tilts their head during a posterior bitewing exposure. Expected error?

A. Overlapping contacts on one side

Patient’s tongue not touching roof of mouth during panoramic exposure. Artifact?

A. Dark radiolucent band across maxillary teeth

A PA of the mandibular molar is blurred with double outlines. Cause?

A. Patient movement during exposure

Receptor too far anterior during posterior bitewing. Likely error?

A. Distal of last molar missing

Receptor too far anterior during posterior bitewing. Likely error?

A. Distal of last molar missing

Head rotated to the left. Effect?

A. Right molars elongated

Adult posterior bitewing: vertical angulation?

A. +10°

If a patient moves receptor during exposure, artifact?

A. Blurred image or double outline

Chin tipped too low → error?

A. Mandibular incisors blurred / “v-shaped”

Tongue not on roof of mouth during PA → artifact?

A. Dark radiolucent band along maxillary teeth

For correct bitewing positioning, mid-sagittal plane must be

A. Perpendicular to floor