DANB Dental Radiology Exam Prep 1 With Complete Solution

If a patient tries to look at the technician during a panoramic radiograph, what will the image look like ? A. The condyles are not even. B. Teeth large on one side of the image and small on the other side. C. The nasal structure appears to be distorted. D. Double exposure. - Answer Teeth large on one side of the image and small on the other side What is used to take a panoramic radiograph? A. Film cassette. B. F speed. C. D speed. Bitewing. - Answer Film cassette A computer used for digital imaging- A. Cannot be used for other office functions. B. Can be used for other office functions. C. Is the most expensive component of the system. D. Is nonessential hardware. - Answer Can be used for other office functions. X-rays: A. Travel in curved lines. B. Travel in straight lines. C. Travel in intermittent lines. D. Do not travel in lines. - Answer Travel in straight lines. A radiograph that is too light is most likely an example of which of the following? A. Double exposure. B. Overexposed. C. Patient movement. D. Underexposed. - Answer Underexposed. A film that is too light is the result of: A. Overexposure. B. Overdeveloping. C. Increasing target-to-film distance. D. Double exposure. - Answer Increasing target-to-film distance. A herringbone pattern on low density film is caused by: A. Static electricity. B. Film bending. C. Backward placement of the film packet. D. Double exposure. - Answer Backward placement of the film packet. Which intraoral radiograph would you use on a patient who needs oral surgery? A. Bitewing. B. Bite block. C. Occlusal. D. Periapical. - Answer Periapical. The speed of film is determined by: A. The film size. B. The amount of radiation emitted from the X-ray machine. C. The size of the silver halide crystals. D. The exposure time. - Answer The size of the silver halide crystals. The thyrocervical collar is positioned to cover the: A. Torso. B. Arms. C. Chest. D. Throat. - Answer Throat. Film speed is not determined by: A. Size of silver crystals. B. Thickness of emulsion. C. Black paper in film packet. D. Special radiosensitive dyes. - Answer Black paper in film packet. How many film sizes do you have to choose from with a bitewing radiograph? A. 1 B. 2 C. 3 D. 4 - Answer 4 What size film is used when taking occlusals? A. Size 1. B. Size 2. C. Size 3. D. Size 4. - Answer Size 4 What is a benefit of using dual film packets? A. It protect patients from unnecessary radiation exposure. B. It is more cost effective. C. It creates two images in one exposure. D. All of the above. - Answer All of the above. What is the best way to prevent fingerprints on film? A. Wash hands. B. Wear gloves. C. Dry hands. D. Do not wash hands. - Answer Wear gloves. What is NOT true of patients who do not have teeth? A. Their facial structures determine film placement. B. Parallel and bisecting techniques may be used. C. Cotton rolls may be necessary. D. They do not need radiographs. - Answer They do not need radiographs. A tissue that lies within primary dental beam and is very radiosensitive is the: A. Tongue. B. Cornea. C. Thyroid. D.Inner ear. - Answer Cornea. What should you do for a nervous patient? A. Sedate the patient. B. Explain the steps of the radiography. C. Restrain the patient. D. Reschedule the radiography for another day. - Answer Explain the steps of the radiography. What will static electricity cause on a panoramic image? A. Black marks. B. White streaks. C. No image. D. Multiple images. - Answer Black marks. The oldest intraoral radiographic technique is the: A. Paralleling technique. B. Full-mouth radiographic technique. C. Bisecting the angle technique. D. Bitewing radiographic technique. - Answer Bisecting the angle technique. The dental assistant is using a size 2 receptor for anterior placements using the bisecting technique. Which of the following radiographs would be exposed first? A. Canine (Tooth number 6). B. Lateral incisor (Tooth number 7). C. Central incisor (Tooth number 8). D. Canine (Tooth number 27). - Answer Canine (Tooth number 6). What option does digital imaging have that traditionally radiography lacks? A. 2-D. B. 3-D. C. Clear pictures. D. Accuracy. - Answer 3-D Long exposure time for dental X-ray film results in: A. Light film. B. Gray film. C. Clear film. D. Dark film. - Answer Dark film. A radiograph with high resolution is: A. Blurry. B. Distorted. C. Sharp. D. Fuzzy. - Answer Sharp. Radiographic images which provide a wider view of either the entire mandibula or maxilla are known as which of the following? A. Bite-wing. B. Periapical. C. Occluded. D. Occlusal. - Answer Occlusal. Less radiation is required by digital radiography than conventional radiography because A. The sensor is smaller. B. The sensor is more sensitive to x-rays. C. Exposure time is increased.. D. Pixels sense transmitted light quickly. - Answer The sensor is more sensitive to x-rays. A device that intercepts the X-ray beam after it has passed through the patient's body and produces an image in digital form is called a: A. Image receptor. B. Artifact. C. Sensor. D. Digital camera. - Answer Image receptor. Which of the following is NOT a historical finding that indicates the need for radiography? A. Implants. B. Previous endodontic therapy. C. Swelling. D. Family history. - Answer Swelling. How much should exposure time for children be reduced in intraoral radiography? A. One-half. B. One-third. C. One-quarter. D. Two-thirds. - Answer One-third. Vertical bitewing radiographs are recommended over horizontal bitewing radiographs when: A. Adults have periodontal disease. B. Adolescents have suspected third molar impactions. C. Adults have misaligned teeth. D. A child has rampant caries. - Answer Adults have periodontal disease. If a safelight filter is used, prolonged exposure can do what? A. Make the image brighter. B. Make the image clearer. C. Not damage film emulsion. D. Still damage film emulsion. - Answer Still damage film emulsion. How many seconds should you allow between films when feeding them into the processor? A. 5 B. 10 C. 35 D. 20 - Answer 10 A film has a streaks and scratches after being processed. What is the cause? A.Roller marks. B. Fixer stain. C. Emulsion tear. D. Developer stain. - Answer Emulsion tear. Light images with a herringbone pattern indicate which of the following? A. The patient moved during the procedure. B. The film was placed in the patient's mouth backwards. C. Water has gotten onto the film. D. The developing solution was too cold. - Answer The film was placed in the patient's mouth backwards. The rollers in automatic processors should be cleaned weekly for: A. 5-8 minutes. B. 30 minutes. C. 10-15 minutes. D. 20 minutes. - Answer 10-15 minutes. Film processing maintenance requires that surfaces of the tanks and countertops should be cleaned with a damp sponge: A. After each use. B. Every 30 days. C. Every 4-6 weeks. D. Every 2 weeks. - Answer After each use.