DAMB RHS EXAM
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Why do we take x-rays? | To determine the dental health status of a patient beyond the oral exam (clinical exam).
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| What is a periapical (PA) | The tissues surrounding the apex of the root of a tooth 2-3mm
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| Who benefits from dental x-rays? | Patient, Practice, Insurance
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| What is the primary benefit of an xray? | To detect disease. Decay and Periodontal disease
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| What can be found in an xray | Developing teeth, missing teeth, supernumary teeth (extra), impacted teeth, caries, recurrent caries, periodontal disease, dilacerated roots (abnormal curves), retained root tips, periapical lesions/infections
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| Define radiopaque | The light or white areas of the film. The more dense the tissue or material, the whiter it will appear
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| Radiolucent | Dark areas that x-rays pass through easily
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| Difference between interpretation and diagnosis | Interpretation- ability to read and explain what is revealed by a radiograph.
Diagnosis- Giving a disease or condition to the image that is seen
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| Define Density | The overall darkness of the x-ray picture
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| Define contrast | Level of differentation between the black/white/gray areas of the film. Higher contrast is very black and white, lower contrast has more shades of gray
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| What are the three factors for an x-ray | Time, kilovoltage, and miliamperage
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| Within the x-ray tube, electrons are generated by the | tungsten filament in the cathode
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| The "Guidelines for Prescribing Dental Radiographs" states that | Dentulous adult recall patients who are not at increased risk for caries should have posterior bite-wing examinations at 24-36 month intervals
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| You are going to take dental images on your patient/ He is larger than average. What machine setting adjustment should you make prior to taking dental images | Increase impulses
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| Stochastic biologic effects from radiation | occur as a result of exposure, but severity is not determines by dose
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| When the film exits the film processor, you notic that is appears foggy and tacks detail. What could be a possible solution to prevent this from occuring with the next patient's film | Eliminate light leaks
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| The stepwedge technique for evaluating developer strength relies on exposing one exposed stepwedge film | each day
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| To test the automatic film processor, {BLANK} in the automatic processor. | Unwrap two unexposed films, expose one to light and then process both films
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| What is true about the development step in film processing | Developing is the first step in processing film
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| The overall apperance of your film is too dark. Which of the following is the cause of this error | Film was in the developer too long
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| To create a reference radiograph, what needs to be fresh | FIlm, developer, fixer
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| In order to perform the safelighting test, you would use {BLANK} | a coin
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| When a stepwedge technique is used to evaluate developer strength, and the density on the daily radiograph differs from that on the standard radiograph by more than one {blank} steps, the developer solution is depleted | Two
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| Generally, there are {blank} elements to informed consent | Four
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| Your former patient has moved and would like his records including the original radiographs sent to his new dentist. What would you do? | Keep the original films, and send the news dentist a duplicate set
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| The bite-wing image is used in the | interproximal examination
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| Your patient has no clinical sign of disease, how frequently should you take a CMS on your patient | You CANNOT take a CMS
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| your new adult patient has no clinical sign of disease and no restorations. What type of images should you take | Bite-Wings
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| Mounted radiographs increase | accessibility for interpretation
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| In the labial mounting method, radiographs are placed with the {blank} side of the identification dot facing the viewer. They are then viewed from the {blank} aspect | Raised Labial
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| According to your text , when viewing radiographs in sequential order, the third step in viewing radiographs should begin with the | mandibular left side
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| Which of the following areas would appear the most radiopaque on a dental image | Enamel
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| If the operating kilovoltage is increased, the receptor density {blank} because the average energy of the x-rays is raised | increases
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| A stepwedge will reveal that images taken at a lowes kV will have {BLANK} than images taken at a higher kV | a higher contrast
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| the geometric characteristic of {BLANK} referes to an image that appears larger than the actual size of the object it represents | Magnification
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| What are the influencing factors would degrade sharpess | Larger silver halide crystal size AND Larger focal spot
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| What is a true statemtnt reguarding the use of lead aprons and throid collars | The apron should cover from the neck to just above the patient's knees
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| A dental assistant experiencences an occupational exposure. A patient's blood has splased into the employee's eye. What is an appropriate step to take? | Document the incident, including the source individual, the employee, route of exposure, and how it happened
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| What is flase regarding handwashing | Alcohol-based hand gel can be used in place of soap and water on hands that are visibly dirty
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| A new patient has recently moved to the area and arrives for her first appointment in the detal practice. She is 6 months pregnant. She is complaining of a tootache. She does not bring dental records with her. What would be the most appropriate? | Only x-ray the area she is complaining about using the lead apron and thyroid collar for protection
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| How does the use of photostimulable storage phosphor (PSP) plates affect digital radiography | PSP plates do not offer immeditate access to the digital image
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| What would NOT be a reason for the dental x-ray image to come out black? | Processing time is too short
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| What will happen to an x-ray film that is left in the processing solution too long | The image with be either partially or completely missing
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| During manual processing, how long should the film remain in the developer solution if the temperature of the solution is 65F | 6 minutes
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| What can be disposed of in the regular trash or down the drain | Developer
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| What do NOT include anatomical landmarks of the mandible | Incisive foramen, mental foramen, genial tubercle
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| When identifying anatomical structures and dental materials on radiograph, what is TRUE | The dentin is not as radiopaque as enamel
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| For manual duplication of x-ray films, what conditions is incorrect | Film duplication can be done in the regular office setting without any special conditions
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| What is the function of the collimator | It forms the shape and size of the x-ray beam upon leaving the tubehead
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| What best describes the effects of long-term low-dose radiation exposure | The effect of long-term low-dose radiation exposure can cause changes at the cellular level in the human body that would b be observed for many years
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| A young patient is having difficulty holding still for x-rays. What is the most appropriate step for the dental assistant to take? | Ask the parent to have the child sit on his or her lap with both covered by the lead apron
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