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30 Cards in this Set
- Front
- Back
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Difference between bitewing and periapical image |
Bitewings show upper and lower teeth in occlusion Periapical show entire tooth from occlusal surface to incisal edge to about 2-3 mm beyond the apex to show periapical bone. |
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What are the 2 techniques that can be used for exposing images? |
Bisecting and paralleling |
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Why is exposure sequence important? |
More likely to omit an area or expose it twice |
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When exposing images, which area of mouth should you begin? |
Maxillary right quadrant |
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Which projection should be first for posterior exposures? |
Premolar view |
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What type of film or sensor holders can be used in the bisecting technique? |
Any |
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What error occurs when the horizontal angulation is incorrect? |
Overlapped contact areas |
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What 2 errors occur when vertical angulation is incorrect? |
Elongated or foreshortened images |
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In bisecting technique, how is the film or sensor placed in relation to the teeth? |
Close to the crowns of the teeth |
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Purpose of bitewing images |
Detect interproximal caries, early carius lesions that aren't clinically evident, examining crestal bone levels of teeth |
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What horizontal angulation should be used for bitewing images? |
Operator must determine |
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What size film is used in adult in the occlusal technique? |
#4 |
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When are occlusal radiographs indicated? |
When large areas of the maxilla and mandible must be radiographed |
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What physical disabilities may affect dental patients? |
Vision, hearing, mobility |
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Under what circumstances would you hold film sensor for a patient? |
Never |
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For partially edentulous patients, how can you modify the technique for bite block? |
Place cotton roll on bite block where crowns of missing teeth would be |
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When exposing images on a pediatric patient, how can you best describe the tube head for the patient? |
A camera to take a picture of your teeth |
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What changes must be made in exposes factors when one is exposing dental images on a pediatric patient? |
Reduce exposure factors for size of patient and to reduce blurriness if child moves |
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What changes must be made in exposes factors when one is exposing dental images on a pediatric patient? |
Reduce exposure factors for size of patient and to reduce blurriness if child moves |
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What size film is recommended for pediatric patient with all primary dentition? |
Size # 0 |
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What changes must be made in exposes factors when one is exposing dental images on a pediatric patient? |
Reduce exposure factors for size of patient and to reduce blurriness if child moves |
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What size film is recommended for pediatric patient with all primary dentition? |
Size # 0 |
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Why is the exposing sequence especially important when one is taking X-rays on a patient with severe gag reflux? |
Max molar placement is most likely to cause gag reflex. Expose this molar last. |
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What is the definition of a diagnostic quality image? |
Those that have been properly placed, exposed, and processed. |
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When mounting radiographs, what is the recommendation of the ADA concerning placement of the raised dot? |
Labial mounting method - raised dots facing up (convex) |
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When mounting radiographs, what is the recommendation of the ADA concerning placement of the raised dot? |
Labial mounting method - raised dots facing up (convex) |
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Why is it important for the dental assistant to recognize anatomical landmarks? |
For proper mounting of dental radiographs |
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When mounting radiographs, what is the recommendation of the ADA concerning placement of the raised dot? |
Labial mounting method - raised dots facing up (convex) |
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Why is it important for the dental assistant to recognize anatomical landmarks? |
For proper mounting of dental radiographs |
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Why is it important to avoid retakes? |
Errors in dental treatment, waste of time and resources. |
