Dental Assistant Practice Exam

What is the primary use of an occlusal radiograph?

1. To assess tooth decay

2. To record large areas of the maxilla, mandible, or floor of the mouth

3. To evaluate periodontal disease

4. To analyze bone structure

The correct answer is: To record large areas of the maxilla, mandible, or floor of the mouth

The primary use of an occlusal radiograph is indeed to record large areas of the maxilla, mandible, or floor of the mouth. This type of radiograph provides a broad view that captures the whole arch of teeth, which is particularly useful for assessing the overall layout and orientation of the teeth and supporting structures in a larger context than individual periapical or bitewing radiographs. Occlusal radiographs help in identifying and diagnosing conditions affecting large areas, such as the presence of unerupted teeth, cysts, or other abnormalities in the jawbone. They offer valuable information when examining traumas to the jaw, large lesions, or in planning for ortho- or oral surgery, thus facilitating better clinical decision-making. In comparison, the assessment of tooth decay, evaluation of periodontal disease, and analysis of bone structure are typically better suited for different types of radiographs. While occlusal radiographs can provide some information on these conditions, they are not specifically designed for these assessments, making their primary role centered around larger view points of the oral cavity.