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ndaeb exam 2 questions and answers
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ndaeb exam 2outlining the tray - ANS margins of the cast where the finished tray will be seated are outlined in pencil
2-3mm beyond last tooth
mucogingival junction
spacer - ANS Creates room for impression material
paper towel or baseplate wax
spacer stops - ANS What is placed to prevent a tray from seating too deeply onto the arch or quadrant?
triangle or round holes
4 minimum for edentulous
crowns are - ANS filled with cement
With regard to tissues most sensitive to radiation, which of the following is the correct order from most
sensitive to least sensitive tissue? - ANS skin, oral mucosa, thyroid gland, nerve
Critical organ - ANS eyes
bone marrow
salivary gland
thyroid gland
skin
gonrads
radiation sensitivity - ANS high- small lymphocyte
,- bone marrow
- reproductive cells
fairly high- skins
- lens of eye
- oral mucosa
medium- connective tissue
- small blood vessels
- developing bone and cartilage
fairly low- mature bone and cartilage
-salivary gland
- thyroid gland
- kidney
- liver
low- muscle tissue
- nerve tissue
Even though the dental laboratory disinfects impressions and appliances that are received from the
dental office, the responsibility of the dental office is to: - ANS disinfect every item that is sent to the
laboratory
When does a laboratory coat or protective gown need to be changed? - ANS if it becomes visibly soiled
with blood
When a dental assistant is cleaning instruments, what type(s) of personal protective equipment should
be worn? - ANS safety glasses, examination gloves, and protective gown
Which type of film is used in panoramic imaging? - ANS screen
, A removable denture prosthesis can be cleaned in the dental office by all of the methods listed except -
ANS with routine prophylaxis instruments and brushes in the patient's mouth
SDS - ANS 16 sections
The dental assistant will mix the glass inomer to a ________ or ________ consistency for a core build-
up. - ANS base, secondary
You have a new dental x-ray machine. The length of the PID is changing from 16 to 8 inches. How does
this affect the intensity of the x-ray beam? What adjustment will you need to make to keep the density
of your images consistent? - ANS The resultant beam will be four times as intense. You will need to
decrease the exposure time
How should instruments with hinges (e.g., scissors, forceps, pliers) be positioned in the sterilizer? - ANS
Hinged instruments should be positioned with the hinges open.
Hand lotions with petroleum- or oil-based ingredients should not be used in a dental office because
these products can: - ANS weaken the glove material, especially latex
Which of the following is not a protocol for standard precautions? - ANS relying on the patient's health
history as an indication of risk
You are destroying old patient records. How do you dispose of the dental radiographs? - ANS as normal
office waste
Surgical curette - ANS Resembles a large spoon excavator
On average, processing solution should be changed ____________ - ANS 3-4 weeks
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