In which area is ultrasound NOT typically used for evaluation?

Ultrasound is a versatile imaging modality that plays a significant role in medical diagnostics, particularly in evaluating various organs and systems. In the context of the options provided, dental examinations represent an area where ultrasound is not typically utilized.

While ultrasound is effective for imaging soft tissues, such as the liver, heart, and pelvic organs, it is not commonly used in dentistry. Dental assessments usually rely on radiographic techniques, such as X-rays, for diagnosing conditions related to teeth and surrounding structures. These X-rays provide high-resolution images necessary for detecting cavities, assessing bone health, and planning orthodontic treatments, which ultrasound cannot achieve effectively due to its limitations in resolving fine details of hard tissues like enamel and dentin.

Thus, while ultrasound serves vital functions in assessing liver function, measuring heart size, and investigating pelvic organs, its application does not extend to dental examinations, making this the correct answer.