Dental Radiography Exam Questions And Answers. Verified and Updated
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Course
Dental Radiography Principles and Techniques
Institution
Dental Radiography Principles And Techniques
ng, and occlusal.
Periapical radiographs. - answerRecords images of the teeth and supporting structures. it is
critical to obtain an image that contains the entire length of the tooth plus 3 to 4 mm of
supporting tissues beyond the apex of the tooth.
Bitewing radiographs - answerRecords images ...
EXAM STUDY MATERIALS July 24, 2024 1:33:58 PM Dental Radiography Exam Questions And Answers. Verified and Updated Operator protection - answer✔✔Never stand in the direct line of the primary beam. Never hold film receptor in a patients mouth. Never stand closer than 6 feet to the Xray without an acc eptable barrier. Never use damaged equipment. patient protection - answer✔✔Images should only be made if they offer benefit to the patient. Patients should be protected from unnecessary exposure by use of a thyroid shield/leaded apron. (non-pregnant adult s do not technically need this). The paralleling technique is to be used whenever possible. Proper exposure settings and processing should be used to minimize retakes. Intraoral radiographs - answer✔✔Made by placing the x -ray film inside the mouth and projecting the beam through the anatomic structures of interest from a source outside the face. The three types are periapical, bitewing, and occlusal. Periapical radiographs. - answer✔✔Records images of the teeth and supporting structures. it is critical to obtain an image that contains the entire length of the tooth plus 3 to 4 mm of supporting tissues beyond the apex of the tooth. Bitewing radiographs - answer✔✔Records images of the crowns and interproximal regions of the maxillary and mandibular teeth on t he same film. bitewing radiograph purpose - answer✔✔To reveal interproximal carious lesions (cavities) recurrant decay, faulty restorations, the presence of calculus, crestal bone levels, pulp chamber shapes, and occlusal relationships. occlusal radiograph s - answer✔✔Record images of a large portion of a dental arch on one film. BWS stands for - answer✔✔bitewing survey FMX stands for - answer✔✔full mouth survey CMRS stands for - answer✔✔complete mouth radiographic survey EXAM STUDY MATERIALS July 24, 2024 1:33:58 PM CMRS/FMX - answer✔✔composed of a number of periapical images and bitewings that includes every tooth and all tooth bearing areas. Film size used in adults - answer✔✔No 1 and No 2 Film size used in children - answer✔✔No. 0 Endentulous - answer✔✔Areas withou t teeth (still need to be radiographed) long axis of tooth - answer✔✔an imaginary line splitting the tooth into anterior (front) and posterior (back) halves from the apex to the crown (the actual long axis can be different than expected due to the curvatur e of the tooth.) vertical angulation - answer✔✔the movement of the tube head up and down (nodding yes). The angulation is opposite than expected with a +90 degree angulation when pointing at the ground and a -90 degree angulation when the tubehead faces th e ceiling. horizontal angulation - answer✔✔the movement of the tubehead around the patient in a 360 degree circumference. (shaking head no). No patient should be treated without first... - answer✔✔Completing a medical history form. Infection procedures for surfaces - answer✔✔Disinfect any flat surface in which films or the image receptor is placed and cover it with a barrier. Place barriers over all parts of the x -ray machine, chair, and any surface that may come in contact with the patient or operator, Infection procedures for receptors and films that are repeatedly used. - answer✔✔place a plastic bag around receptor. all materials must be protected from all body fluids, Infection procedures for instruments used in the patients mouth. - answer✔✔should be st erilized between after each use and kept in a closed container for future use. Infection procedures for exposed films - answer✔✔should be placed in a disposable container such as a cup, not in the operators pocket. Infection procedures for the operator - answer✔✔Should wear gloves, a mask, protective eye wear, appropriate gown or clothing. Film emulsion - answer✔✔A coating attached to both sides of the base made of a mixture of gelatin and silver halide crystals. Two types of silver halide crystals - answer✔✔Silver bromide (AgBr) and Silver iodide (AgI) Halides - answer✔✔Chemical compounds that change when exposed to light or radiation. film speed - answer✔✔how much radiation is needed to produce an image on a given film. EXAM STUDY MATERIALS July 24, 2024 1:33:58 PM fastest film speed - answer✔✔F Atten uation - answer✔✔Different tissues stop differing numbers of x -rays based on density, composition, and structure. Latent image - answer✔✔The unseen pattern of the energized and non -energized silver halide crystals that form in the film when exposed to ligh t or radiation. Developer effects - answer✔✔Softens and swells the gelatin allowing all silver halide crystals to be reached by the solution which excites energized crystals and causes them to separate into bromide (or iodine) and metallic silver. the meta llic silver precipitates and adhers to the film itself. fixation effects - answer✔✔Non-energized crystals are washed away during this process. creating differing areas of light or dark depending on how many x -rays attenuated through the tissue. Important c onditions during developing film - answer✔✔Temperature of the developer and the amount of time exposed to developer. The higher temperature the quicker the development. The longer time the more crystals that will be developed energized or not. Optimum temp erature for manual processing when developing films - answer✔✔68 degrees Fahrenheit (20 Celsius) Optimum time for developing film - answer✔✔4 1/2 to 5 mins at optimum temperature. Rinsing should be in - answer✔✔Clean circulating water for 30 seconds. Optimum fixing time - answer✔✔At least 10 minutes or twice the developing time purpose of washing film - answer✔✔to remove all chemicals to insure that the film is not discolored or damaged with age. optimum time for washing - answer✔✔20 minutes how often should the processing chemicals be checked - answer✔✔everyday before any films are processed. stepwedge - answer✔✔a device with a graduated increase in thickness of material that is placed on a film that is exposed to x -rays. it produces a practice test fi lm to be developed to check the solutions for quality. First step in manual processing - answer✔✔Stir the solutions with individualized paddles to equalize temperature and evenly mix chemicals. Second step in manual processing - answer✔✔check solution leve ls and add the appropriate chemical to bring it to optimum levels.
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