5 Questions
True or false: In the AP 'open mouth' projection, if the teeth are superimposed on the upper dens, repositioning by slight hyperextension of the neck is recommended
True
True or false: The AP 'open mouth' projection is used to evaluate the cervical spine at the C1 and C2 level
True
True or false: Rotation of the cervical spine can imitate pathology by causing unequal spaces between lateral masses and dens
True
True or false: The AP 'open mouth' projection requires clear demonstration of soft tissue margins and of bony margins and trabecular markings of cervical vertebrae
True
True or false: In the AP 'open mouth' projection, if the base of the skull is superimposed on the upper dens, repositioning by slight hyperflexion of the neck is recommended
True
Study Notes
AP 'Open Mouth' Projection
- The AP 'open mouth' projection is used to evaluate the cervical spine at the C1 and C2 level.
- In this projection, if the teeth are superimposed on the upper dens, repositioning by slight hyperextension of the neck is recommended.
- Rotation of the cervical spine can imitate pathology by causing unequal spaces between lateral masses and dens.
- The AP 'open mouth' projection requires clear demonstration of soft tissue margins and of bony margins and trabecular markings of cervical vertebrae.
- If the base of the skull is superimposed on the upper dens, repositioning by slight hyperflexion of the neck is NOT recommended (instead, hyperextension is recommended if the teeth are superimposed).
Test your knowledge of the evaluation criteria for the AP 'Open Mouth' Projection of the C1 and C2 cervical spine. Assess your understanding of the anatomy demonstrated, optimal neck position, and superimposition indicators.
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