DANB Radiation Health and Safety (RHS) Practice Exam

What is the correct film position required during the paralleling technique?

1. 1/2 inch above the occlusal plane

2. Parallel to the long axis of the tooth

3. Horizontal to the long axis of the tooth

4. None of the above

The correct answer is: Parallel to the long axis of the tooth

During the paralleling technique, the film must be positioned parallel to the long axis of the tooth being imaged. This alignment ensures that the image captured is a true representation of the tooth's size and shape. When the film is parallel to the long axis, it minimizes distortion and provides a more accurate radiograph, which is essential for diagnostic purposes. Correct positioning is crucial for creating a proper image. If the film is not parallel, it could result in elongation or foreshortening of the tooth in the image, leading to misinterpretation. The paralleling technique is especially important in dental radiography to achieve the best quality images, which enables accurate assessment and diagnosis of dental conditions.