Dental Radiography Exam 1 2025

Three components of xray machine - Correct Ans-tubehead, extension arm, and control panel four components of xray film - Correct Ans-film base, adhesive layer, film emulsion, and protective layer ________ in film emulsion absorb the x-radiation during xray exposure and store the energy from the radiation - Correct Ans-silver halide crystals invisible pattern on emulsion - Correct Ans-latent image three types of film used in dental radiography - Correct Ans-intraoral film, extraoral film, duplicating film intraoral film sizes - Correct Ans-0,1,2,3,4--larger the number, larger the size intraoral film speeds - Correct Ans-D, F......f speed film reduces patient exposure to radiation by 60% compared with d speed __________ transform xray energy into visible light, which in turn exposes the screen film - Correct Ans-intensifying screens special type of photographic film used to make an identical copy of an intraoral or extraoral radiograph - Correct Ans-duplicating film 5 steps in film processing - Correct Ans-development, rinsing, fixation, washing, and drying chemical solution used in development process to reduce the exposed, energized silver halide crystals - Correct Ans-developer developer solution 4 basic ingredients - Correct Ans-developing agent, perservative, accelerator, and restrainer fixer solution 4 basic agents - Correct Ans-fixing agent, preservative, hardening agent, and acidifier disease transmission may occur as a result of - Correct Ans-direct contact with pathogens in saliva, blood, respiratory secretions, lesions...indiret contact with contaminated objects or instruments....direct contact with airborne contaminants present in spatter or aerosols or oral and respiratory fluids 3 conditions for infection control to occur - Correct Ans-susceptible host, pathogen with suffiencient infectivity and numbers to cause infection minimum ppe's - Correct Ans-protective attire, care of hands film is placed in mouth, parallel to long axis of tooth, central ray is directed perpendicular to film and long axis of tooth - Correct Ans-paralleling technique anterior teeth film size - Correct Ans-1 posterior teeth size film - Correct Ans-2 5 basic rules of paralleling technique - Correct Ans-film must cover prescribed area, film positioned parallel to long axis of tooth, central ray directed perpendicular to film and long axis of tooth, central ray directed through contact areas between teeth, and xray beam centered over film to ensure all areas of film are being exposed which teeth should you always start with in paralleling technique - Correct Ans-anterior advantages of paralleling technique - Correct Ans-produces images with dimensional accuracy,simple and easy to learn and use, easy to standardize, and can be accurately repeated bisecting technique used to expose - Correct Ans-periapical films in bisecting technique: - Correct Ans-film placed along lingual surface of tooth, where film contacts tooth-plane of film and long axis of tooth form an angle, imaginary bisector divides the angle in half or bisects it, and central ray of xray beam is directed perpendicular to the imaginary bisector film size used with bisecting - Correct Ans-2--positioned vertically for anterior and horizontally for posterior incorrect horizontal angulation results in - Correct Ans-overlapping correct vertical angulation has the tooth... - Correct Ans-the same size as the film Forshortening - Correct Ans-excessive vertical angulation, tooth is shortened elongation - Correct Ans-insufficient vertical angulation, tooth is longer bite-wing includes - Correct Ans-crowns of maxillary and mandibular teeth, interproximal areas, and areas of crestal bone on the same film four sizes of film - Correct Ans-0,1,2,3...size 2 recommended occlusal - Correct Ans-large areas of upper or lower jaw size film used - Correct Ans-4 occlusals used for: - Correct Ans-localization of rooths, impacted teeth, foreign bodies, salivary stones; eval of size fo lesions, boundaries of maxillary sinus, and jaw fractures; exam of patients who cannot open their mouths; measurments of changes in size and shape of jaw