Outlining the tray Right Ans - margins of the cast where the finished tray
will be seated are outlined in pencil
2-3mm beyond last tooth
mucogingival junction
Spacer Right Ans - Creates room for impression material
paper towel or baseplate wax
Spacer stops Right 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 Right 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? Right Ans -
skin, oral mucosa, thyroid gland, nerve
Critical organ Right Ans - eyes
bone marrow
salivary gland
thyroid gland
skin
gonrads
Radiation sensitivity Right 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
Even though the dental laboratory disinfects impressions and appliances that
are received from the dental office, the responsibility of the dental office is to:
Right Ans - disinfect every item that is sent to the laboratory
When does a laboratory coat or protective gown need to be changed? Right
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? Right Ans - safety glasses,
examination gloves, and protective gown
Which type of film is used in panoramic imaging? Right Ans - screen
A removable denture prosthesis can be cleaned in the dental office by all of
the methods listed except Right Ans - with routine prophylaxis instruments
and brushes in the patient's mouth
SDS Right Ans - 16 sections
The dental assistant will mix the glass inomer to a ________ or ________
consistency for a core build-up. Right 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? Right 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? Right Ans - Hinged instruments should be
positioned with the hinges open.
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