Dental Radiology Exam Practice Questions and Answers (100% Pass)

Dental Radiology Exam Practice Questions and Answers (100% Pass) What is the inverse square law when it comes to radiation - Answer️️ - Standing back by double the distance from a source of radiation (d to 2d) will quarter the dose to the radiologist or radiographer. It means that when you double the distance from the source of radiation, the intensity of radiation is diminished to a 1/4 of what it was originally. which exposure technique do the american academy of oral and maxillofacial radiology and the american association of dental schools recommend? - Answer️️ -parallel why is an exposure sequence important? - Answer️️ -so areas of the mouth are not missed or retaken? when you are exposing images, in which area of the mouth should you begin? - Answer️️ -maxillary anterior When exposing the posterior radiographs which teeth should you start with - Answer️️ -Pre molar area What size film should be used for a bite wing series? - Answer️️ -Size #2 films How many films are in a bitewing series? - Answer️️ -4, 2 premolar images and 2 molar images ©SOPHIABENNET@2024/2025 Tuesday, August 20, 2024 10:21 AM 2 Why are occlusal radiographs ordered? - Answer️️ -When there is a need to view large areas on the maxilla and the mandible. For partial edentulous patients, how can you modify the technique of using a bite block to take x-rays? - Answer️️ -By placing a cotton roll on the bite block where the teeth would have been. which exposure should be the first for the posterior regions? - Answer️️ - mandibular premolar What changes must be made on the exposure factor when taking x rays on a child patient? - Answer️️ -Reductions on the exposure factors What size film is recommended for a child patient with all primary teeth? - Answer️️ -Size #0 When mounting radiographs, where is the recommended placement of the dot? - Answer️️ -The raised dot facing the dental specialist. What is the recommended temperature for the developing solution? - Answer️️ -68degreesF, 20degreesC for 4.5 minutes How long should the film be rinsed after the developer? - Answer️️ -20-30 seconds to remove developer solutions How long should the film stay in the fixer solutions? - Answer️️ -10 minutes ©SOPHIABENNET@2024/2025 Tuesday, August 20, 2024 10:21 AM 3 After the fixer how long should the film be rinsed and why? - Answer️️ - It should be rinsed for at least 20 minutes if not the film could turn yellow and fade over time. FOGGED FILM - Answer️️ -Fogged film may be caused by: Exposure of film to light during storage. Leaving film unprotected (that is, outside the lead-lined box or in the x-ray room during operation of the x-ray machine). Use of film that has been exposed to heat or chemical fumes. Use of improperly mixed or contaminated developer. Defective safelight. No image - Answer️️ -No image may result if no current was passing through the tube at the time of exposure or if the film was placed in the fixing solution before it was placed in the developing solution. How long is the process for automatic processing from beginning to end? - Answer️️ -4-6 minutes 3-11. OVEREXPOSED IMAGE An overexposed image (see figure 3-12), an image that is too dark, may be caused by: ©SOPHIABENNET@2024/2025 Tuesday, August 20, 2024 10:21 AM 4 Too much radiation exposure. Too much development time. Use of developing solution that is too warm. - Answer️️ -An overexposed image appears too dark, may be caused by: Too much radiation exposure. Too much development time. Use of developing solution that is too warm. BLURRED IMAGE - Answer️️ -A blurred image is easily recognized by the appearance of more than one image of the object, or objects, on the film. It may be caused by movement of the patient, film, or tube during exposure. What are the main components of the dental X ray machine - Answer️️ - The tubehead, extention arm, control panel why is it not recommended to have the patient hold the image receptor during exposure? - Answer️️ -the patient receives unnecessary radiation What is the PID - Answer️️ -It is the positioning indicating device it is the cylindrical or rectangular part of the x-ray machine and it is used to aim the x-ray beam at the film in the patient's mouth. ©SOPHIABENNET@2024/2025 Tuesday, August 20, 2024 10:21 AM 5 what type of film holder can be used in the bisecting technique - Answer️️ -BAI, EeZee Grip, Stabe Contrast of an image - Answer️️ -It is the range of shades of gray to black to white. Contrast, it is influenced by the kVp Density of an image - Answer️️ -Is the overall blackness or darkness of a film, it is directly influenced by the mAs Sharpness of the image - Answer️️ -Refers to how well the radiograph reproduces the fine details or distinct outlines of an object. Sharpness is also referred to as detail, resolution or definition . penumbra of an image - Answer️️ -The fuzzy blurred are