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Osteoradionecrosis develops due to damage rendered to which of the
following structures? Ans✓✓✓blood vessels
____________________disrupts normal blood circulation within the
bone, causing severe damage to the blood vessels by endarteritis and
thrombosis that eventually results in the blockage or obliteration of the
blood flow. Ans✓✓✓Osteoradionecrosis
A periapical radiograph suggests an opaque mass over the apex of the
maxillary right second molar. A second periapical radiograph is made
with the x-ray head adjusted in a more mesial direction. The second
periapical suggests that the object in question has moved distally
compared to the first radiograph. Which of the following directions
describes the location of the object? Ans✓✓✓Buccal to the tooth
The same lingual, opposite buccal (SLOB) rule suggests that the object
is buccal to the tooth.
If the object moved mesially with the head of the x-ray head also being
moved mesially, it would have demonstrated lingual/palatal positioning.
, Which of the following describes why lead is used in x-ray machines?
Ans✓✓✓collimation
or shaping of the beam, due to its ability to block x-ray photons going in
unnecessary directions.
What does collimation allow? Ans✓✓✓Collimation allows the clinician
to keep the radiation dose as low as reasonably achievable (ALARA) so
excess radiation is blocked before it reaches the patient.
What is aluminum used for in x-ray machines? Ans✓✓✓aluminum is
used to filter out low-energy x-ray beams
The anode of an x-ray machine is composed of which of the following
materials? Ans✓✓✓Tungsten
tungsten because it has a high atomic number and is highly resistant to
heat.
What is europium used for ? Ans✓✓✓often used in digital radiograph
sensors