Chapter 1
A form of energy carried by waves or streams of particles.
Radiation
The first step in limiting the amount of x-radiation received by a dental patient
Proper prescribing of dental images
The ________ __________ suspends the x-ray tubehead, houses the electrical wires, and allows for movement and positioning of the tubehead
Extension Arm
What vertical angulation should you use when adjusting the PID to take bite-wing images with bite-tabs
+10
Yes or No. The lead apron with thyroid collar is optional at Shoreline Dental Clinic
Yes
A picture on film produced by the passage of x-rays through an object or body
Radiograph
What is a PID
Position-indicating device
What is XCP Rinn?
Beam Alignment Device
You will need to take a retake on your patient’s mandibular right premolars because of overlapping. The overlapping is more excessive toward the mesial of the film than the distal of the film. What do you need to do to prevent this error on the retake?
Correct horizontal angulation, direct the PID more toward the distal
Digital imaging uses a ________ to produce an image
sensor
A recording medium; examples include x-ray film, phosphor plate, or digital sensor
Image receptor
What type of PID is the most effective in reducing patient exposure?
16-inch (long) rectangular
Contains the x-ray tube that produces dental x-rays
Tubehead
Where should you position the mesial/front edge of the receptor when taking a premolar bite-wing image
Midline of the mandibular canine
An extraoral technique for a dental image
Panoramic
Bavarian physicist that discovered x-rays
Wilhelm Conrad Roentgen
What does the collimator do?
Restricts the size and shape of the x-ray beam
3 component parts to the intraoral dental x-ray machine
Tubehead, extension arm, and control panel
What modification in technique is recommended when the patient has an edentulous space causing a problem with bite-wing receptor placement?
Place a cotton roll in the area of the missing tooth or teeth
Added filtration in the dental x-ray tubehead
results in a more penetrating useful beam
The most important uses of dental images
Detection - many dental diseases and condition produce no clinical signs or symptoms
What is MPD?
Maximum Permissible Dose is the maximum dose of radiation that the body can endure with little or no injury
When did federal guidelines come out to regulate diagnostic equipment performance standards?
1974
When determining vertical angulation, if the position-indicating device (PID) is positioned above the occlusal plane and the central ray is directed _______, the vertical angulation is termed _________.
downward; positive
Digital images require ____% less exposure than films.
Exposure times are ____% shorter than that required for conventional radiography
50% and 90%