RHS Exam
What are x-rays - Question and answersradiant energy waves that are produced,
charged, and emitted from a common center in the dental radiation tube.
How are x-rays generated? - Question and answersThe X-ray tube, also known as a
vacuum tube, produces X-rays. The vacuum tube contains these seven elements of
note: cathode, filament, anode, focal spot, aluminum filter, collimator, aperture
what does the cathode do? - Question and answerselectrode in the X-ray tube that is
the electron source.
What does the filament do? - Question and answerstungsten coil in the cathode
focusing cup that heats up to generate the electrons.
what does the anode do? - Question and answersthe target for the electron cloud that
converts the electron force into photons.
what does the focal spot do? - Question and answerstarget area on the anode where
rays are projected to make the primary beam, or central beam; the smaller focal spot
produces a better image.
what does the aluminum filter do? - Question and answersaluminum disks that are
placed between the collimator attachment and the exit window of the tube to absorb
weak radiation.
what does the collimator do? - Question and answersa lead device inside the X-ray
tubehead used to restrict the size and shape of the X-ray beam, helping to avoid stray
radiation.
What does the aperture do? - Question and answersopening in the lead collimator disk
that regulates the size of the primary beam.
What is PID? - Question and answersposition indicating device
What is the purpose of a periapical radiograph? - Question and answerssize 0
(pedodontic size), 1 (adult anterior), or 2 (adult anterior and posterior); used for the
intraoral periapical view of the entire tooth or teeth in a given area along with adjacent
tissues and oral structures.
What is the purpose of a bitewing radiograph? - Question and answersfilm used to
record crown and interproximal views of both arches while in occlusion; used intraorally
with attached bite tab.
, what is the purpose of taking a full mouth series of x-rays? - Question and
answersmultiple exposures of the oral cavity showing crown and root area in a series of
radiographic views. When arranged in proper sequence, these films or images give a
survey or view of the condition of the entire mouth
What is the purpose of an occlusal x-ray? - Question and answerssize 4; film that may
be used intraorally or extraorally to expose large areas
What is the purpose of taking a panoramic x-ray? - Question and answersa special
radiograph capturing a view of the entire dentition with the surrounding structures on
one film.
What is the purpose of a Cephalometric radiograph? - Question and answersalso called
headplates. These extraoral radiographs of the head are used in orthodontic, oral
surgery, and sometimes in prosthodontic dentistry.
What is the purpose of a CBCT (cone-beam computed tomography) - Question and
answers
Identify radiographs used to examine or view specific conditions, teeth or landmarks. -
Question and answers
Technique: Review patient medical and dental histories for contraindications, including
medications - Question and answers
Intraoral techniques, including error correction: Bisecting angle - Question and
answersThe central X-ray beam is directly perpendicular with an imaginary bisecting
line of the angle formed by the plane of the film and the long axis of the tooth. This
technique is also called the short cone technique.
Intraoral techniques, including error correction: paralleling - Question and answersThe
film packet is placed parallel to the long axis of the tooth and at a right (90-degree)
angle to the central X-ray beam. This technique is also called the extension cone or
right-angle technique.
Extraoral techniques, including error correction
a. Panoramic b. Cephalometric c. CBCT (cone-beam computed tomography) basics -
Question and answers
Technique modifications based on anatomical variations and clinical conditions -
Question and answers
positioning terms: sagittal plane - Question and answersalso called midsagittal plane;
imaginary vertical line bisecting the face into a right and left half; important during
exposure to determine positioning of the patient.
What are x-rays - Question and answersradiant energy waves that are produced,
charged, and emitted from a common center in the dental radiation tube.
How are x-rays generated? - Question and answersThe X-ray tube, also known as a
vacuum tube, produces X-rays. The vacuum tube contains these seven elements of
note: cathode, filament, anode, focal spot, aluminum filter, collimator, aperture
what does the cathode do? - Question and answerselectrode in the X-ray tube that is
the electron source.
What does the filament do? - Question and answerstungsten coil in the cathode
focusing cup that heats up to generate the electrons.
what does the anode do? - Question and answersthe target for the electron cloud that
converts the electron force into photons.
what does the focal spot do? - Question and answerstarget area on the anode where
rays are projected to make the primary beam, or central beam; the smaller focal spot
produces a better image.
what does the aluminum filter do? - Question and answersaluminum disks that are
placed between the collimator attachment and the exit window of the tube to absorb
weak radiation.
what does the collimator do? - Question and answersa lead device inside the X-ray
tubehead used to restrict the size and shape of the X-ray beam, helping to avoid stray
radiation.
What does the aperture do? - Question and answersopening in the lead collimator disk
that regulates the size of the primary beam.
What is PID? - Question and answersposition indicating device
What is the purpose of a periapical radiograph? - Question and answerssize 0
(pedodontic size), 1 (adult anterior), or 2 (adult anterior and posterior); used for the
intraoral periapical view of the entire tooth or teeth in a given area along with adjacent
tissues and oral structures.
What is the purpose of a bitewing radiograph? - Question and answersfilm used to
record crown and interproximal views of both arches while in occlusion; used intraorally
with attached bite tab.
, what is the purpose of taking a full mouth series of x-rays? - Question and
answersmultiple exposures of the oral cavity showing crown and root area in a series of
radiographic views. When arranged in proper sequence, these films or images give a
survey or view of the condition of the entire mouth
What is the purpose of an occlusal x-ray? - Question and answerssize 4; film that may
be used intraorally or extraorally to expose large areas
What is the purpose of taking a panoramic x-ray? - Question and answersa special
radiograph capturing a view of the entire dentition with the surrounding structures on
one film.
What is the purpose of a Cephalometric radiograph? - Question and answersalso called
headplates. These extraoral radiographs of the head are used in orthodontic, oral
surgery, and sometimes in prosthodontic dentistry.
What is the purpose of a CBCT (cone-beam computed tomography) - Question and
answers
Identify radiographs used to examine or view specific conditions, teeth or landmarks. -
Question and answers
Technique: Review patient medical and dental histories for contraindications, including
medications - Question and answers
Intraoral techniques, including error correction: Bisecting angle - Question and
answersThe central X-ray beam is directly perpendicular with an imaginary bisecting
line of the angle formed by the plane of the film and the long axis of the tooth. This
technique is also called the short cone technique.
Intraoral techniques, including error correction: paralleling - Question and answersThe
film packet is placed parallel to the long axis of the tooth and at a right (90-degree)
angle to the central X-ray beam. This technique is also called the extension cone or
right-angle technique.
Extraoral techniques, including error correction
a. Panoramic b. Cephalometric c. CBCT (cone-beam computed tomography) basics -
Question and answers
Technique modifications based on anatomical variations and clinical conditions -
Question and answers
positioning terms: sagittal plane - Question and answersalso called midsagittal plane;
imaginary vertical line bisecting the face into a right and left half; important during
exposure to determine positioning of the patient.
