The surgery I observed was to correct a type II fracture of the dens on the axis, a bone articulating with the atlas. The atlas and the axis are the first vertebrae of the spine. The atlas (C1) articulates with the base of the skull. This atlantooccipital joint helps create a head nod (‘yes’ motion). The atlantoaxial articulation rotates along a vertical axis, creating a head shake (‘no’ motion).
The patient had broken their dens, a process on the axis articulating with the atlas. Even though the neck had been braced for some time, the area would not heal. To correct this screws and rods were placed in the pedicle of the vertebra. Being that they are irregular vertebrae, it might be more correct to say the screws were under the articulating facets. This is lateral to the vertebral foramen and away from the vertebral arteries.
For my portfolio I plan to finish filling in the tone of the remaining drawings but for the assignment the first three illustrations were fully rendered in tone. I really like using the toned background. I think it was a good choice, especially since I had so much bone to render! The toned paper gave me more flexibility when rendering the light tones.
I can’t wait to fill in the bone chips and render the suture line!