Dental imaging.

Radiography continues to be the initial test of choice in equine dental imaging for reasons of availability and ability to detect bone and tooth changes. Contrast radiography may be useful to characterize dental involvement in cases with draining tracts. For radiographically occult lesions, other modalities are useful. CT is better than plain radiography due to the inherent avoidance of superimposition of the opposite dental arcade, excellent bone density characterization, and good spatial resolution. Nuclear medicine may be useful to verify bone involvement in the dental region in cases in which the signs are particularly vague or not readily localized. Ultrasonography is an excellent test for soft tissue characterization and may assist with the characterization of suspected bone lysis, pathologic fractures, and abscesses.