DENTAL RADIOLOGY FINAL EXAM QUESTIONS AND ANSWERS VERIFIED 100% CORRECT

DENTAL RADIOLOGY FINAL EXAM QUESTIONS AND ANSWERS VERIFIED 100% CORRECT Which of the following choices would result in increased magnification of the radiographic image? a. Increased target-film distance b. Decreased object-film distance c. Increased object-film distance d. Both a and b - ANSWER -C. Increased object-film distance What is a latent image? - ANSWER -The image on the radiographic film before processing but after exposure. Which type of silver halide crystals are removed from the film? - ANSWER -the unexposed, unenergized crystals What is the recommended distance for the safety light to be away from the film? - ANSWER -4 feet What causes static electricity to affect dental films? - ANSWER -low humidity levels Which of the following statements is true of automatic film processors? a. All automatic film processors are capable of processing a number of different sizes of x-ray film. b. All automatic film processors may be used in a room with white light. c. Only automatic film processors with daylight loaders may be used in a room with white light. d. Both a and c. - ANSWER -C. Only automatic film processors with daylight loaders may be used in a room with white light. An exhausted developer produces a radiograph with what type of density and contrast? - ANSWER -reduced density and contrast What factors can cause underdeveloped film? - ANSWER -An underdeveloped film may result from low developer temperature, inadequate development time, and/or from depleted or contaminated developer solution. Developer cutoff has what kind of appearance? - ANSWER -Straight white border on the film To conduct a film-screen contact test, where is the wire mesh test object is placed? - ANSWER -On top of the loaded cassette. The viewbox should emit a uniform and subdued light when it is functioning properly. Permanently discolored Plexiglas surfaces and blackened fluorescent light bulbs must be replaced. a. Both statements are true. b. Both statements are false. c. The first statement is true; the second statement is false. d. The first statement is false; the second statement is true. - ANSWER -A. Both statements are true How can you test an automatic processor? - ANSWER -Unwrap two unexposed films, expose one to light, and then process both films The stepwedge technique for evaluating developer strength relies on exposing one exposed stepwedge film how often? - ANSWER -every day What is the clearing test used to monitor? - ANSWER -fixer strength How is informed consent obtained? - ANSWER -Informed consent must be presented in a language that the patient will understand, it requires that patients have their questions ANSWERed before x-ray exposure/treatment, that patients receive enough information to make informed choices, and if the patient is a minor it must be obtained from a parent or legal guardian. Which of the following statements is true of radiographs and the patient's dental record? a. Radiographs may be discarded when outdated. b. It is advised to keep patient radiographs in a file separate from patient charts. c. The dental record must include documentation of the number and type of radiographs exposed. d. Dental radiographs are an optional rather than integral part of the dental record. - ANSWER -C. The dental record must include documentation of the number and type of radiographs exposed. Which of the following items should be removed by the patient during preparation for radiographic procedures? 1. Eyeglasses 2. Dentures 3. Chewing gum a. 1, 2, 3 c. 1, 3 b. 2, 3 d. 2 only - ANSWER -A. 1, 2 and 3 What error causes unexposed film? - ANSWER -Failure to turn on the x-ray machine Which of the following films would most likely appear black? a. An unexposed film c. An overexposed film b. A film exposed to light d. An underexposed film - ANSWER -B. A film exposed to light What will cause teeth to look short with blunted roots? - ANSWER -excessive vertical angulation The panoramic film is typically used to evaluate and diagnose what condition? - ANSWER -impacted teeth A ghost image appears larger and ____ than its actual counterpart. - ANSWER More indistinct What patient positioning error during a panoramic will result in an "exaggerated smile line" seen on the radiograph? - ANSWER -Chin is tipped down.