Which extractions should generally be avoided in the field?

The correct choice focuses on the extraction of teeth associated with pericoronitis. Pericoronitis is an inflammation of the soft tissue surrounding a partially erupted tooth, most commonly the third molars (wisdom teeth). This condition can lead to significant complications, including infection and systemic involvement.

When a tooth is involved in pericoronitis, the surrounding tissue may be inflamed and infection may be present. Extracting a tooth under these circumstances can pose a higher risk of complications, such as excessive bleeding or the spread of infection. Additionally, the inflammation can make the extraction more difficult due to the increased sensitivity and the anatomical changes that might occur in the area.

In contrast, extracting teeth with caries, teeth that have previously had fillings, or endodontically treated teeth may be more straightforward procedures. While these conditions may require careful management and consideration, they do not inherently present the same level of risk as extracting a tooth associated with an active inflammatory condition like pericoronitis. Thus, avoidance of extractions in the field should prioritize situations that pose a higher risk of complications, making pericoronitis a primary concern.