Term
| The shorter a wavelength of an x-ray the greater the what? |
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Definition
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Term
| What is a focal spot on the anode? |
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Definition
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Term
| What is the portion on the x-ray unti that contains the master switch, the indicator light, the selector buttons and the exposure button? |
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Definition
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Term
| What does ALARA stand for? |
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Definition
| As Low As Reasonably Achievable |
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Term
| What are the somatic effects of radiation responsible for? |
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Definition
| poor health, cause illness and are not passed onto offspring. |
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Term
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Definition
| A very small bundle of pure energy that has no weight or mass. |
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Term
| What is the process by which electrons are removed from atoms, causing harmful effects of radiation in humans called? |
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Definition
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Term
| How is exposure of a radiograph on a child different from exposure of an adult? |
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Definition
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Term
| How does blurred film occur? |
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Definition
| From movement of the patient |
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Term
| What causes cone cutting? |
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Definition
| When the central ray is not accurately aimed at the center of the film. |
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Term
| When taking a full mouth series of x-rays on a patient, where should the mid-sagittal plane of the patient's head be positioned? |
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Definition
| perpendicular to the floor |
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Term
| What is the bisecting angle technique used for and how is it positioned? |
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Definition
Anatomic adnormalities.
The central ray must be directed at the right angles to an imaginary line, which bisects the angle formed by the long axis of the tooth and the plane of the film. |
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Term
| What are the two small circular radiolucency near the roots of the mandibular premolars called |
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Definition
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Term
| What is the material that DOES stop or reabsorb x-rays called? |
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Definition
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Term
| What is the material that DOES NOT stop or reabsorb x-rays called? |
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Definition
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Term
| What are three examples of radiopaque material? |
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Definition
| Alevolar bone, cortical plate and enamel. |
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Term
| What are two examples of materials that appear radiolucent on x-rays? |
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Definition
| Cavities (decay), pulp chamber |
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Term
| What type of film reveals the whole tooth, including the apex? |
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Definition
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Term
| Which is the best x-ray to detect interproximal carries with? |
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Definition
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Term
| What is the purpose of the lead foil in dental film? |
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Definition
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Term
| What does the raised button/dot on the radiograph help with? |
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Definition
| Mounting. The raised dot faces outwards toward you. |
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Term
| What is film speed determined by? |
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Definition
| The size of silver bromide crystals on traditional film. |
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Term
| What each use, what must you do with the lead apron? |
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Definition
| Drape it over a support rod, unfolded. |
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Term
| The amount of radiation a person recieves is what in a human body over time? |
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Definition
| Cumulative (keeps adding up) |
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Term
| What are x-ray processing tanks considered? What must you do to them? |
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Definition
| They are considered secondary containers. According to the OSHA they must b labeled. |
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Term
| The quality, or penetrating power of secondary radiation is what? |
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Definition
| Less than that of primary radiation |
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Term
| What is scatter radiation a type of? |
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Definition
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Term
| Where are the instructions and information for proper disposal of x-ray processing solutions found? |
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Definition
| In the Material Safety Data Sheet (MSDS) |
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Term
| What is the x-ray at the center of the primary beam called? |
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Definition
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Term
| What is the highest point of radiation during an x-ray exposure called? |
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Definition
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Term
| What is the portion of the target that is struck by electrons called? |
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Definition
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Term
| What must the dental assistant use when exposing film? |
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Definition
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Term
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Definition
| The negative electrode in the x-ray tube |
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Term
| What does Milliamperage control? |
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Definition
| The heating of the cathode |
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Term
| A milliampere (mA) is one one-thousandth of an ampere and a measurement to describe what? |
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Definition
| The intensity of an electric current |
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Term
| An exposed x-ray film covered with a plastic barrier envelope is considered to be what? |
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Definition
| Contaminated. (the barrier is contaminated, the film inside is sterile) |
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Term
| A dental assistant may expose radiographs if what? |
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Definition
| If it is permissible in the state in which he/she is employed. |
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Term
| What are the benefits of digital radiology? |
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Definition
| Digital radiography saves time in processing, reduces exposure times, reduces radiation to patient and is much easier for the dentist to diagnose from. |
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Term
| What is lateral jaw radiology used for? |
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Definition
| To view posterior regions of the mandible. |
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Term
| For pediatric patients, what two factors are different? |
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Definition
| The film size is smaller and the exposure factors are reduced. |
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Term
| The horizontal angulations of the central ray ray stay the same for which two techniques? |
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Definition
| Bisecting and Paralleling |
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Term
| What are elongated images a result of? |
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Definition
| Insufficient vertical angulation |
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Term
| Overlapping contact areas are a result of what? |
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Definition
| Incorrect horizontal angulations |
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Term
| Anterior films are always placed in what way in the mouth? |
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Definition
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Term
| Panoramic x-rays are helpful in seeing what? |
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Definition
| Tumors, cysts, and the whole mouth on one film. |
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Term
| How many films does a full mouth series have? |
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Definition
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Term
| How can a dental assistant reduce risk of contamination while taking x-rays? |
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Definition
| Wearing gloves and mask, using plastic barriers, and disinfecting contact areas after use |
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Term
| Film that comes out black indicates what? |
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Definition
| A light leak. The film was exposed to light from the sun or light bulb before the fixer "fixed" the image on the film. |
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Term
| Film that is too light indicates what? |
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Definition
| Inadequate time in developer |
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Term
| How long does it take an automatic processor to develop films? |
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Definition
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Term
| What color is a safe light in a dark room? |
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Definition
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Term
| How often should fixer and developer be changed? |
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Definition
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Term
| What comes after the fixer? |
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Definition
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Term
| Film turning brown is an indicator of what? |
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Definition
| That the film wasn't in the fixer long enough |
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Term
| Pregnant dental patients should always wear what? |
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Definition
| double lead aprons (2 aprons) |
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Term
| To protect themselves from radiation what should an operator do? |
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Definition
| wear a radiation film badge, use fast film, stand 6-8 feet away. |
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Term
| What are the most sensitive cells to radiation? |
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Definition
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Term
| Exposure to radiation can cause what in the body? |
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Definition
| Changes in body chemicals, cells and tissues, and organs |
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Term
| Ionizing radiation is harmful in what amount? |
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Definition
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