Chapter 38
What type of charge is an electron?
Negative
The most commonly used film size for adult intraoral dentistry is size
#2
Direct and Indirect
Which radiograph is used to detect interproximal decay and early periodontal disease?
Bitewing
What is the horseshoe shaped zone that the patients jaws are positioned in
Focal trough
In dentistry, the __________ the wavelengths of the x-rays, the greater their energy and their usefulness.
Shorter
If you are using size 2 receptors, how many exposures will you need to take of the anterior teeth?
6
The authors recommend using a size ____ receptor for anterior teeth and a size ____ receptor for posterior teeth.
1:2
How many anterior films will you have if you use a size #1 film/sensor?
8
In extraoral radiography the tubehead rotates ____ the patients head
Behind
Restricts the size and the shape of the xray beam
Collimator
If you are taking an anterior image sequence, which tooth do the authors recommend you begin with?
What is the name of the #18?
mandibular 2nd molar
When taking a FMX what is the next exposure after the anterior images have been taken?
Max R premolar
If the patients jaw is positioned to far forward how would the teeth appear?
Skinny
The heart of the x-ray generating system is the
x-ray tube
If the RINN is assembled for the UL quadrant what othre quadrant can you take a x-ray without reassembling the RINN?
LR
What is the maximum permissible dose (MPD) for dental health professionals?
5000 millirem (mrem)
5.0 rems
0.05 Sv
The dentist says she would like to see more areas of black and white. Would you increase or decrease the kVp?
Decrease
You evaluate a panoramic radiograph after exposure and notice a radiolucent shadow that obstruct the anterior teeth. What positioning error could have taken place?
Lips/tongue
Federal regulation require that the maximum diameter of the x-ray beam as it exits the PID should not exceed how many inches?
2.75
Which radiolucent landmark is found near the mandibular premolars that gets mistaken for a periapical abscess?
Mental foramen
The coronoid process may be seen on a ______________ periapical image.
Maxillary molar
Insufficient vertical angulation will create a film that is:
Elongated
If you notice a reversed smile line on the radiograph what error took place?
Chin too high