Selected Cervical Pathologies, Dysfunctions, and Treatments 1 Practice Test

Open-mouth radiographs are designed to visualize the upper cervical spine, specifically the C1–C2 region. This view places the atlas (C1) and axis (C2) in profile and lets the dens (odontoid process) be seen clearly relative to the anterior arch of C1. Because of this orientation, the dens and its junction with the atlas are the structures best assessed on this projection, making it the go-to view for evaluating dens integrity and odontoid fractures as well as atlantoaxial alignment. The other structures listed are not the primary focus of this view; the spinous processes, posterior arches, and vertebral bodies are better evaluated on other angles or lateral views.