Waters Projection Radiographic Technique Quiz
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Questions and Answers

Which area is most likely to elicit the gag reflex when stimulated?

  • Anterior receptors
  • Posterior lateral third of the tongue
  • Soft palate
  • Maxillary molar region (correct)

    • What are the two reactions that occur before the gag reflex is initiated?

  • Softening of the palate and relaxation of the tongue
  • Cessation of respiration and contraction of the muscles in the throat and abdomen (correct)
  • Increased salivation and swallowing
  • Contraction of the jaw muscles and closing of the eyes

    • What should be done to avoid stimulating the gag reflex when placing receptors in the maxillary posterior areas?

  • Place the receptor as quickly as possible
  • Slide the receptor along the palate
  • Limit the amount of time the receptor remains in the mouth (correct)
  • Expose the receptors at the beginning of the procedure

    • Which of the following is NOT a purpose of extraoral imaging?

    <p>To evaluate growth and development</p> Signup and view all the answers

    What is the size of the most commonly used extraoral film?

    <p>8 x 10 inch</p> Signup and view all the answers

    Which type of screens emit green light in film-based extraoral imaging?

    <p>Rare earth screens</p> Signup and view all the answers

    When should a grid be used in extraoral imaging?

    <p>When improved image quality and high contrast are necessary</p> Signup and view all the answers

    Which of the following is NOT a recommended technique to help suppress the gag reflex during receptor placement and exposure?

    <p>Placing a small amount of ordinary table salt on the tip of the tongue</p> Signup and view all the answers

    What should the dental radiographer do if the patient starts gagging upon receptor placement?

    <p>Remove the receptor as quickly as possible</p> Signup and view all the answers

    What is the recommended sequence for receptor placement in a patient who has a severe gag reflex?

    <p>Anterior, premolar, molar</p> Signup and view all the answers

    How should the dental radiographer communicate with a blind or visually impaired patient?

    <p>Face the patient and speak clearly and slowly</p> Signup and view all the answers

    Which projection is used to evaluate the maxillary sinus area and also demonstrates the frontal and ethmoid sinuses, the orbits, and the nasal cavity?

    <p>Waters projection</p> Signup and view all the answers

    Which projection is used to identify the position of the condyles, demonstrate the base of the skull, and evaluate fractures of the zygomatic arch?

    <p>Submentovertex projection</p> Signup and view all the answers

    Which projection is used to identify fractures of the condylar neck and ramus area?

    <p>Reverse Towne projection</p> Signup and view all the answers

    Which projection is used to evaluate the superior surface of the condyle and the articular eminence, and can also be used to evaluate movement of the condyle when the mouth is opened?

    <p>Transcranial projection</p> Signup and view all the answers

    Which of the following is NOT considered a developmental disability?

    <p>Epilepsy</p> Signup and view all the answers

    What is the recommended technique for taking dental images in children with primary or transitional dentition?

    <p>Bisecting technique</p> Signup and view all the answers

    Which type of dental sensor is preferred for intraoral placement in young children?

    <p>Wireless sensor</p> Signup and view all the answers

    What is the purpose of an intraoral periapical projection in the edentulous patient?

    <p>To examine root tips</p> Signup and view all the answers

    Which structures are examined in temporomandibular joint tomography?

    <p>Condyle, articular eminence, and glenoid fossa</p> Signup and view all the answers

    What is the purpose of tomography?

    <p>To show structures within a selected plane of tissue</p> Signup and view all the answers

    How is the selected plane of tissue achieved in TMJ tomography?

    <p>By moving the receptor and x-ray tubehead in opposite directions around a fixed rotation point</p> Signup and view all the answers

    Which projection is used to evaluate impacted third molars, large lesions, and fractures that extend into the ramus of the mandible?

    <p>Lateral Jaw – Ramus of Mandible</p> Signup and view all the answers

    Which projection is used to evaluate facial growth and development, trauma, and disease and developmental abnormalities, and demonstrates the bones of the face and skull as well as the soft tissue profile of the face?

    <p>Lateral Cephalometric Projection</p> Signup and view all the answers

    Which projection demonstrates the mandibular premolar and molar regions as well as the inferior border of the mandible, and is used to evaluate impacted teeth, fractures, and lesions located in the body of the mandible?

    <p>Lateral Jaw – Body of Mandible</p> Signup and view all the answers

    Which projection is used to evaluate facial growth and development, trauma, and disease and developmental abnormalities, and demonstrates the frontal and ethmoid sinuses, the orbits, and the nasal cavity?

    <p>Posteroanterior Projection</p> Signup and view all the answers

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