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ch 41
recall
| Term | Definition |
|---|---|
| What is the difference between a bite wing and a periapical image | bitewing image - shows the upper and lower teeth in occlusion. periapical image - shows the entire tooth from occlusal surface or incisal edge to about 2 to 3 mm beyond the apex. |
| What are two techniques that can be used for exposing images | Bisecting and parallel technique |
| Why is an exposure sequence important | without a planned exposure sequence, you are more likely to omit an area or to expose the same area twice |
| When exposing images, in which area of the mouth should you begin | Maxillary anterior right |
| Which projection should be the first for posterior exposures | Premolar |
| Why is it not recommended to have the patient hold the film or sensor during exposure | Unnecessary radiation |
| What type of film or sensor holders can be used in the bisecting technique | EeZee - grip holder |
| What error occurs when the horizontal angulation is incorrect | Overlapped or unopened contact areas |
| What two error occurs when the horizontal angulation is incorrect | enlongated or foreshortened images |
| In the bisecting technique, how is the film or sensor placed in relation to the teeth | close to the crowns of the teeth |
| What is the purpose of bitewing images | to detect interproximal caries and exam crestal bone level between teeth |
| What horizontal angulation should be used for bitewing images | +10 |
| What size film is used for adults in the occlusal technique | #4 |
| When are occlusal radiographs indicated | To show a wide view of the arch of the upper and lower jaws |
| What physical disabilities may affect dental patients | vision, hearing, and mobility |
| Under what circumstances would you hold a film sensor for a patient | none |
| For partially edentulous patients, how can you modify the technique for using a bite-block | With a cotton roll |
| When exposing images on a pediatric patient, how can you best deceive the tube head for the patient | as a camera |
| What changed must be made in exposure factors when one is exposing dental images on a pediatric patient | milliamperage, kilovoltage, and exposure time |
| What size of film is recommended for a pediatric patient with all primary dentition | #0 |
| Why is the exposure sequence especially important when one is taking x-rags on a patient with a severe gag reflex | in preventing gag reflex and keep track of expose areas |
| What is the definition of a diagnostic-quality image | those that have been properly placed, exposed, and processed |
| When mounting radiographs, what is the ADA's recommendation concerning placement of the raised dog | to use the labial method with the dot facing up |
| Why is it important for the dental assistant to recognize an anatomic landmarks | to mount dental radiographs correctly |
| Why is it important to avoid retakes | to prevent additional exposure of the patient to ionizing radiation |