Dental Radiography Chapter 2 Questions and Answers Graded A+

Dental Radiography Chapter 2 Questions and Answers Graded A+ What is the recommended exposure time for an adult periapical X-ray? It typically ranges from 0.1 to 0.3 seconds, depending on the settings and equipment. How should the X-ray beam be positioned for a bitewing radiograph? The X-ray beam should be directed horizontally, with the film positioned parallel to the teeth. What does the term "bisecting angle technique" refer to in dental radiography? A technique where the X-ray beam is directed at an angle to the bisector of the angle formed by the tooth and film. What is the role of the processing chemicals in dental film development? The developer reduces exposed silver halide crystals to black metallic silver, while the fixer removes unexposed crystals, stabilizing the image. What is the optimal temperature for developing dental X-ray film? 2 The developer solution should be maintained at around 68°F (20°C). How should the X-ray film be positioned in the patient's mouth for a periapical radiograph? The film should be placed parallel to the long axis of the tooth being radiographed. What is the proper method for handling dental X-ray film to prevent contamination? Films should be handled by the edges, using gloves or clean hands to avoid exposure to fingerprints and other contaminants. What is the difference between direct and indirect digital radiography? Direct digital radiography uses a sensor to capture the image, while indirect digital radiography uses a phosphor plate that is later scanned to create an image. What is the purpose of the X-ray film holder during dental radiography? To stabilize the film in the correct position inside the patient's mouth for accurate imaging. What is the effect of overexposure on a dental radiograph? Overexposure results in an image that is too dark, with reduced contrast and detail. 3 What is the recommended technique for taking a panoramic radiograph? The patient should bite on a special bite block while the X-ray machine moves around the head, capturing a wide-angle image. What is the role of the grid in dental radiography? A grid is used to reduce scattered radiation, improving image contrast. What type of imaging system is most commonly used in modern dental radiography? Digital radiography systems What should be done if a dental radiograph shows excessive distortion? The positioning of the film or X-ray beam should be adjusted to improve alignment and reduce distortion. What is the primary advantage of using digital radiography over traditional film-based radiography? Digital radiography provides faster image acquisition and allows for immediate viewing, reducing patient wait times. 4 What is the correct way to store exposed dental radiographs? Exposed films should be stored in a cool, dry, and dark place, away from radiation sources. What is the impact of using a longer source-to-film distance on the radiographic image? A longer source-to-film distance reduces distortion and improves image clarity and sharpness. What is the ideal distance between the operator and the patient during a radiographic procedure? The operator should remain at least 6 feet away from the X-ray source during exposure to minimize radiation exposure. What should be done if a radiograph is underexposed? Increase the exposure time, mA, or kVp to ensure sufficient exposure for proper image quality. What is the role of the X-ray film in capturing the image during dental radiography? The X-ray film contains a photosensitive emulsion that reacts to X-rays, producing an image of the dental structures. 5 How should a patient be positioned for a periapical X-ray? The patient's head should be in a neutral position, with the teeth centered in the X-ray beam. What is the purpose of a lead shield for the patient in dental radiography? To protect sensitive areas of the body, such as the reproductive organs, from unnecessary radiation exposure. What is the effect of using a smaller focal spot size in dental radiography? A smaller focal spot size improves image sharpness and resolution. What is the purpose of using a phosphor plate in