Dental Assistant Practice Exam

In the bisecting angle technique, what is the purpose of the film holder?

1. To stabilize the film and ensure correct positioning

2. To protect the patient from radiation

3. To enhance image contrast

4. To allow for easier digital imaging

The correct answer is: To stabilize the film and ensure correct positioning

In the bisecting angle technique, the primary purpose of the film holder is to stabilize the film and ensure correct positioning. This technique involves aligning the film along the plane of the tooth while the central ray of the x-ray beam is directed perpendicular to an imaginary line that bisects the angle formed between the long axis of the tooth and the film. Using a film holder is crucial for achieving accurate radiographs, as it helps maintain the proper distance and angle required to capture a clear image. By stabilizing the film, the film holder minimizes movement during exposure, which could distort the image and lead to misinterpretation by the dentist or oral healthcare professional. This accurate positioning is vital for diagnosing dental conditions effectively. The other options, while important for various aspects of dental imaging, do not specifically relate to the primary function of the film holder in this technique. For instance, protecting the patient from radiation and enhancing image contrast are important factors in radiography but are not directly linked to the role of the film holder itself. Similarly, while digital imaging techniques have become more common, the film holder's main function in the bisecting angle technique remains focused on stabilization and positioning of the film.