DHYG 1304 EXAM 4 QUESTIONS & ANSWERS
T/f: panoramic radiography is based on the principles of tomography - Answer -true
Which of the following is most likely to result in a retake of a bitewing radiograph? -
Answer -the patient swallowed during the exposure
Which of the following is the best recommendation when it becomes impossible to place
an intraoral image receptor because of an exaggerated gag reflex? - Answer -substitute
an extraoral radiograph
If a resultant panoramic image shows a reversed smile (frown), the likely cause is that -
Answer -the patient's chin was too high
Each of the following statements regarding fundamentals of panoramic radiography is
correct except one. Which one is the exception? - Answer -the xray source and the film
remain stationary
T/f: periapical radiographs of an edentulous ridge should be exposed with the bisecting
technique - Answer -true
What is the result if a bitewing radiograph is exposed using a vertical angulation of -10
degrees? - Answer -more mandibular teeth and bone are imaged, cutting off a portion
of the maxillary structures
The greatest limitation of panoramic radiographs is the inability to - Answer -produce
image sharpness
What size image receptor is used for occlusal radiographs on most adult patients? -
Answer -4
Each of the following is a patient positioning consideration for producing a quality
panoramic radiograph except one. Which one is the exception? - Answer -the patient
must be in a standing position
Each of the following is a use of an occlusal radiograph except one. Which one is the
exception? - Answer -detecting incipient, interproximal caries
What size image receptor would best image a bitewing radiograph on a 4 year old? -
Answer -0 or 1
Which of the following describes the collimator of the panoramic xray beam? - Answer -
it is a narrow slit
T/f: panoramic radiography is based on the principles of tomography - Answer -true
Which of the following is most likely to result in a retake of a bitewing radiograph? -
Answer -the patient swallowed during the exposure
Which of the following is the best recommendation when it becomes impossible to place
an intraoral image receptor because of an exaggerated gag reflex? - Answer -substitute
an extraoral radiograph
If a resultant panoramic image shows a reversed smile (frown), the likely cause is that -
Answer -the patient's chin was too high
Each of the following statements regarding fundamentals of panoramic radiography is
correct except one. Which one is the exception? - Answer -the xray source and the film
remain stationary
T/f: periapical radiographs of an edentulous ridge should be exposed with the bisecting
technique - Answer -true
What is the result if a bitewing radiograph is exposed using a vertical angulation of -10
degrees? - Answer -more mandibular teeth and bone are imaged, cutting off a portion
of the maxillary structures
The greatest limitation of panoramic radiographs is the inability to - Answer -produce
image sharpness
What size image receptor is used for occlusal radiographs on most adult patients? -
Answer -4
Each of the following is a patient positioning consideration for producing a quality
panoramic radiograph except one. Which one is the exception? - Answer -the patient
must be in a standing position
Each of the following is a use of an occlusal radiograph except one. Which one is the
exception? - Answer -detecting incipient, interproximal caries
What size image receptor would best image a bitewing radiograph on a 4 year old? -
Answer -0 or 1
Which of the following describes the collimator of the panoramic xray beam? - Answer -
it is a narrow slit
