What is the primary use of a Birault probe?

The primary use of a Birault probe is to find cavities in interproximal areas. This instrument is specifically designed for detecting decay that may not be visible to the naked eye, particularly in the tight spaces between teeth, known as interproximal areas. The probe has a slender, pointed tip that allows dental professionals to gently explore and assess these areas for carious lesions. Its design facilitates access to hard-to-reach spots, making it an essential tool in early cavity detection and preventive dentistry.

In contrast, the other options refer to different dental assessment tools and purposes. While checking for gum disease and measuring tooth sensitivity are important aspects of dental care, they involve different instruments designed for those specific purposes. Polishing the tooth surface pertains to a different procedure focused on oral hygiene rather than cavity detection. Understanding the functions of each instrument helps dental nurses choose the appropriate tools for various clinical situations.