NDAEB Exam Prep Questions and answers, rated A+[LATEST EXAM UPDATES]

NDAEB Exam Prep Questions and answers, rated A+ What two basic methods are used to acquire a digital x-ray image? - -Direct imaging(sensor) & indirect imaging(PSP) Advantages of Digital Radiography - -Immediate viewing of images, less radiation, no chemicals, ability to enhance images, communication with other dentists, no more lost films, remote consultation capability Disadvantages of Digital Radiography - -Cost, converting previous records to digital, learning the computer software, thickness and rigidity of sensors, infection control What is intraoral film composed of? - -Film Base - Clear Cellulose Acetate Thin Adhesive Layer Silver Halide Crystals - absorb radiation A protective layer to protect the emulsion surface. What is a latent image? - -The image on the film that is not yet visible because it has not been processed. What does 'film speed' refer to? - -The amount of radiation that is required to produce a radiograph of standard density. True or false: The larger the silver halide crystals, the faster the film speed? - -True What is the fastest film speed currently available? - -F-Speed. (It reduces patient exposure to radiation by 20-60% compared to E or D speed film) What are the 3 types of x-ray film used in dental radiography? - -Intraoral film, extraoral film, and duplicating film. When does a "Herringbone" pattern occur on dental film? - -When it is placed in the mouth backwards. What are the 5 basic sizes that intraoral film comes in? - -Child Size: 0 Narrow Anterior: 1 Adult Size: 2 Preformed bitewing: 3 (infrequently used) Occlusal: 4 What are two common extraoral radiographs taken? - -Panoramic and Cephalometric. What is an intensifying screen? - -A device that intensifies or increases the effect of radiation and thus decreases the amount of exposure time needed. It is coated with phosphor which gives off light when struck by x-radiation. What are the 5 steps in processing film? - -1. Developing (reduce the silver halide crystals into black metallic silver) 2. Rinsing (remove developer from film) 3. Fixing. (use an acidic solution to remove unexposed silver halide crystals) 4. Washing (wash the film) 5. Drying What are the two techniques that can be used for exposing intraloral images? - -Bisecting & Paralleling 5 Basic Rules of the Paralleling Technique - -1. Placement: it must cover correct teeth to be examined 2. Position: it must be parallel to the long axis of the tooth. 3. Vertical Angulation: Central ray must be directed perpendicular to the receptor & tooth. 4. Horizontal Angulation: Central ray must be directed through the contact areas. 5. Central Ray: it must be centered on th