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Questions and Answers
What is the main purpose of stabilizing devices in extraoral imaging?
Which of the following is NOT a component of an extraoral x-ray machine?
What is the role of the PID in an extraoral x-ray machine?
How can the exposure time be controlled in an extraoral x-ray machine?
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Which extraoral imaging technique is specifically used for diagnostic purposes in orthodontics?
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What feature does the XCP beam alignment device include?
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What is the purpose of a collimating device in extraoral imaging?
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What type of imaging technique involves a comprehensive view of all upper and lower teeth?
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Which component of the dental x-ray machine restricts the size of the x-ray beam?
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What regulates the manufacturing and installation of dental x-ray equipment?
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Which feature is NOT typically found on a dental x-ray control panel?
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Which of the following statements about handheld x-ray units is true?
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Which part of the dental x-ray machine contains the x-ray tube?
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What is generally required for the use of dental x-ray equipment by state and local governments?
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What feature minimizes operator exposure to radiation during x-ray procedures?
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Which of the following is a requirement for dental x-ray machines manufactured after 1974?
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Study Notes
Dental X-ray Equipment Regulations
- All dental x-ray machines manufactured after 1974 must meet specific federal guidelines.
- The federal government regulates the manufacture and installation of dental x-ray equipment.
- State and local governments regulate how dental x-ray equipment is used, dictating codes related to x-radiation.
- Periodic registration, inspection, and monitoring of dental x-ray equipment is required, with fees involved.
Handheld X-ray Units
- Handheld x-ray units are battery-powered and approved by the FDA for use in dentistry.
- These units can produce high-quality diagnostic images.
- They are approved in many states, but each state radiation control board determines the use and protection requirements.
- Operator exposure is limited by a lead acrylic disk shield surrounding the PID.
X-ray Machine Components
- The tubehead contains the x-ray tube that generates dental x-rays.
- The position-indicating device (PID) extends from the tubehead and restricts the x-ray beam size.
- The extension arm holds the tubehead and electrical wires for movement and positioning.
- The control panel allows the dental radiographer to regulate the x-ray beam, often mounted on a floor pedestal, wall, or remote location.
Control Panel Features
- A single control panel can operate multiple x-ray units in adjacent rooms.
- Control panel components include an on-off switch, exposure button, exposure light, and control devices for time, kilovoltage, and milliamperage.
Extraoral Imaging Techniques
- Common extraoral techniques include panoramic, cephalometric, skull imaging, and cone-beam computed tomography.
- Extraoral x-ray machines consist of a tubehead, positioning devices for the head, chin, forehead, and teeth, and an exposure control panel.
- The tubehead contains the x-ray tube, and the PID can be round or rectangular.
- Exposure times range from a few moments to 20–30 seconds.
- Stabilizing devices help position the patient correctly and keep them still during exposure.
Receptor Holders and Beam Alignment Devices
- Receptor holders help align intraoral receptors and eliminate the need for patient stabilization.
- Beam alignment devices indicate the PID position in relation to the tooth and help with accurate image capture.
- Examples include XCP and BAI beam alignment devices.
- Some devices are designed for traditional film or digital sensors.
Collimating Devices
- Collimating devices, like the IDI Tru-Image™ and Rinn Universal collimator, are used in conjunction with beam alignment devices to restrict the x-ray beam size and limit radiation exposure.
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Description
Test your knowledge on the regulations surrounding dental x-ray equipment, including federal guidelines and state-specific rules. Learn about the components of x-ray machines and the requirements for handheld x-ray units. This quiz provides insights into the necessary standards for safe dental x-ray practices.
