Oral Radiology Quiz 2 Solution Manual Fully Solved Latest Update 2025
What is the preferred technique - Answers Paralleling
T/F: Film/sensor is closer to teeth, and rays are perpendicular to an imaginary line between the long axis
or tooth and receptor - Answers False.
That is describing bisecting-angle technique. It is not close to teeth, but parallel to the long axis. Central
rays are perpendicular to long axis of teeth and film/sensor.
In bisecting-angle technique, distortion tends to (increase/decrease) along the image toward to apex -
Answers Increase
What are the methods to minimize loss of image clarity (3) - Answers Use small focal spot
Increase distance from focal spot to object
Decrease distance from object to film/sensor
What are the methods to minimize the size distortion (2) - Answers Increase the focal spot to
film/sensor distance
Decrease the object to film/sensor distance
Ways to minimize shape distortion (2) - Answers Position film/sensor parallel to long axis of object
Orient central ray perpendicular to object+film/sensor
Which is more common: tube shift or right-angle technique (object localization) - Answers Tube shift
SLOB - Answers Same lingual, opposite buccal
How to take right-angle technique - Answers 2 radiographs taken at right/angles to one another
What is main anatomic landmark for extraoral projections? - Answers Canthometal line - from external
auditory canal to outer canthus of eye
Canthometal line forms a __ degree angle with frankfurt line - Answers 10
What is most commonly used extraoral projection in dentistry - Answers Lateral skull project/lateral
cephalometric projection
Evaluate relationship between maxilla, mandible + cranial base
Good for ortho, generate measurements to classify craniofacial morphology
, Patient is placed with _____ side toward receptor (lateral skull projection) - Answers Left side
Lateral skull projection - receptor is _______ to mid sagittal plane and xray is ______ to midsagittal
plane - Answers Parallel
Perpendicular
What is the second most common skull radiograph in dentistry - Answers Posteroanterior skull
projection/ PA cephalometric projection
Evaluation of facial asymmetries + assessment of orthognathic surgery outcomes
PAS projection
Image receptor is _________ of patient, ____________ to midsagittal line, __________ to coronal plane
- Answers Front, perpendicular, parallel
Submentovertex base
Image receptor is ________ to patient's transverse plane and _________ to midsagittal and coronal
planes
Central beam is ___________ to receptor - Answers Parallel, perpendicular, perpendicular
What is submentovertex (base) used for - Answers Zygomatic arch fractures
Base of skull lesions
Water's projection
Image receptor is placed in __________ of patient, ___________ to midsagittal plane
Beam is __________ to image receptor - Answers Front, perpendicular, perpendicular
Is patient's mouth is open for waters' projection, what is seen - Answers Sphenoid sinus
What is water's projection mainly used to observe - Answers Paranasal sinus
Reverse town projection
Image receptor is placed ________ of patient, ________ to midsagittal plane and ______ to coronal
plane - Answers Front, perpendicular, parallel
Reverse towne projection
Patient's mouth is opened so ________ are located ________ to articular eminences - Answers Condylar
heads, inferior
What is the preferred technique - Answers Paralleling
T/F: Film/sensor is closer to teeth, and rays are perpendicular to an imaginary line between the long axis
or tooth and receptor - Answers False.
That is describing bisecting-angle technique. It is not close to teeth, but parallel to the long axis. Central
rays are perpendicular to long axis of teeth and film/sensor.
In bisecting-angle technique, distortion tends to (increase/decrease) along the image toward to apex -
Answers Increase
What are the methods to minimize loss of image clarity (3) - Answers Use small focal spot
Increase distance from focal spot to object
Decrease distance from object to film/sensor
What are the methods to minimize the size distortion (2) - Answers Increase the focal spot to
film/sensor distance
Decrease the object to film/sensor distance
Ways to minimize shape distortion (2) - Answers Position film/sensor parallel to long axis of object
Orient central ray perpendicular to object+film/sensor
Which is more common: tube shift or right-angle technique (object localization) - Answers Tube shift
SLOB - Answers Same lingual, opposite buccal
How to take right-angle technique - Answers 2 radiographs taken at right/angles to one another
What is main anatomic landmark for extraoral projections? - Answers Canthometal line - from external
auditory canal to outer canthus of eye
Canthometal line forms a __ degree angle with frankfurt line - Answers 10
What is most commonly used extraoral projection in dentistry - Answers Lateral skull project/lateral
cephalometric projection
Evaluate relationship between maxilla, mandible + cranial base
Good for ortho, generate measurements to classify craniofacial morphology
, Patient is placed with _____ side toward receptor (lateral skull projection) - Answers Left side
Lateral skull projection - receptor is _______ to mid sagittal plane and xray is ______ to midsagittal
plane - Answers Parallel
Perpendicular
What is the second most common skull radiograph in dentistry - Answers Posteroanterior skull
projection/ PA cephalometric projection
Evaluation of facial asymmetries + assessment of orthognathic surgery outcomes
PAS projection
Image receptor is _________ of patient, ____________ to midsagittal line, __________ to coronal plane
- Answers Front, perpendicular, parallel
Submentovertex base
Image receptor is ________ to patient's transverse plane and _________ to midsagittal and coronal
planes
Central beam is ___________ to receptor - Answers Parallel, perpendicular, perpendicular
What is submentovertex (base) used for - Answers Zygomatic arch fractures
Base of skull lesions
Water's projection
Image receptor is placed in __________ of patient, ___________ to midsagittal plane
Beam is __________ to image receptor - Answers Front, perpendicular, perpendicular
Is patient's mouth is open for waters' projection, what is seen - Answers Sphenoid sinus
What is water's projection mainly used to observe - Answers Paranasal sinus
Reverse town projection
Image receptor is placed ________ of patient, ________ to midsagittal plane and ______ to coronal
plane - Answers Front, perpendicular, parallel
Reverse towne projection
Patient's mouth is opened so ________ are located ________ to articular eminences - Answers Condylar
heads, inferior
