26 Questions
Which area is most likely to elicit the gag reflex when stimulated?
Maxillary molar region
What are the two reactions that occur before the gag reflex is initiated?
Cessation of respiration and contraction of the muscles in the throat and abdomen
What should be done to avoid stimulating the gag reflex when placing receptors in the maxillary posterior areas?
Limit the amount of time the receptor remains in the mouth
Which of the following is NOT a purpose of extraoral imaging?
To evaluate growth and development
What is the size of the most commonly used extraoral film?
8 x 10 inch
Which type of screens emit green light in film-based extraoral imaging?
Rare earth screens
When should a grid be used in extraoral imaging?
When improved image quality and high contrast are necessary
Which of the following is NOT a recommended technique to help suppress the gag reflex during receptor placement and exposure?
Placing a small amount of ordinary table salt on the tip of the tongue
What should the dental radiographer do if the patient starts gagging upon receptor placement?
Remove the receptor as quickly as possible
What is the recommended sequence for receptor placement in a patient who has a severe gag reflex?
Anterior, premolar, molar
How should the dental radiographer communicate with a blind or visually impaired patient?
Face the patient and speak clearly and slowly
Which projection is used to evaluate the maxillary sinus area and also demonstrates the frontal and ethmoid sinuses, the orbits, and the nasal cavity?
Waters projection
Which projection is used to identify the position of the condyles, demonstrate the base of the skull, and evaluate fractures of the zygomatic arch?
Submentovertex projection
Which projection is used to identify fractures of the condylar neck and ramus area?
Reverse Towne projection
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?
Transcranial projection
Which of the following is NOT considered a developmental disability?
Epilepsy
What is the recommended technique for taking dental images in children with primary or transitional dentition?
Bisecting technique
Which type of dental sensor is preferred for intraoral placement in young children?
Wireless sensor
What is the purpose of an intraoral periapical projection in the edentulous patient?
To examine root tips
Which structures are examined in temporomandibular joint tomography?
Condyle, articular eminence, and glenoid fossa
What is the purpose of tomography?
To show structures within a selected plane of tissue
How is the selected plane of tissue achieved in TMJ tomography?
By moving the receptor and x-ray tubehead in opposite directions around a fixed rotation point
Which projection is used to evaluate impacted third molars, large lesions, and fractures that extend into the ramus of the mandible?
Lateral Jaw – Ramus of Mandible
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?
Lateral Cephalometric Projection
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?
Lateral Jaw – Body of Mandible
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?
Posteroanterior Projection
Test your knowledge about the Waters projection, a radiographic technique used to evaluate the maxillary sinus area, frontal and ethmoid sinuses, orbits, and nasal cavity. Learn about proper head positioning and receptor placement in this quiz.
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