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Dental Materials Test 4

40 Questions  I  By Bfrenkel003
Dental Materials test 4
About gypsum materials and periodontal dressings

  
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Question Excerpt

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1.  Alginate impression material is:
A.
B.
C.
D.
2.  Impression materials that have mechanical properties permitting considerable elastic deformation but that return to their original form are classified as:
A.
B.
C.
D.
3.  Dr Jones requested that you mix alginate and take an impression. While measuring the water, you got involved in conversation and did not notice how warm ir was.  This oversight will:
A.
B.
C.
D.
4.  Which of the following  dental materials is an example of an aqueous elastometric?
A.
B.
C.
D.
E.
5.  The brown paste used in rubber base is called the:
A.
B.
C.
D.
6.  Dental impression compound is known as a/an
A.
B.
C.
D.
7.  Which of the following is an example of an inelastic impression material?
A.
B.
C.
D.
8.  The term used for the setting of hydrocolloid impression materials is
A.
B.
C.
D.
9.  The populatrity of agar impression material is limited by the:
A.
B.
C.
D.
10.  When an agar impression slightly contracts and exudes water, it is termed:
A.
B.
C.
D.
11.  Addition silicones are the most popular type of rubber impression materials.  The reason for this is cost.
A.
B.
C.
D.
12.  Custom impression trays are made on a model of the patient's arch.  Therefore, to make a custom tray, an alginate impression is also needed.
A.
B.
C.
D.
13.  Mrs Smith has not been to the dentist for several years.  It was found that she needed extensive restorative treatment to which she agreed.  You were asked to take impressions as the first step of her care.  The impression material of choice would be:
A.
B.
C.
D.
14.  The impression tray that is used to record the prepared tooth, a bite registration, and an impression of the opposing teeth is a:
A.
B.
C.
D.
15.  Which of the following impression materials set by physcial means?
A.
B.
C.
D.
16.  The desirable strength of gympsum materials is ____ related to the amount of water used.
A.
B.
C.
D.
17.  For gypsum products, a suitable accelerator and retarder, respectively, would be:
A.
B.
C.
D.
18.  The gypsum material known as "high strength stone" may be also referred  to as:
A.
B.
C.
D.
19.  The final setting time for gypsum products is typically:
A.
B.
C.
D.
20.  To make a correct mix for dental stone when using 50 g of powder, the amount of water would be approximately:
A.
B.
C.
D.
21.  Cathy and her parents will meet with an orthodontist to discuss an orthodontic treatment plan. At a previous appt, the orthodontist took impressions of Cathys maxillary and mandibular arches. The replicas made from each impression to discuss the treatment plan are termed:
A.
B.
C.
D.
22.  Decreasing the setting time of a dental material results in a products that:
A.
B.
C.
D.
23.  The weakest gypsum products is:
A.
B.
C.
D.
24.  When excess water is not present in a gypsum product, it is knwon as the:
A.
B.
C.
D.
25.  The best way to mix gypsum products is to:
A.
B.
C.
D.
26.  Initial and final setting times of gypsum can be determined with the use of Gilmore Needles. A practical, wasy method to determine final setting time in a dental office would be to:
A.
B.
C.
D.
27.  When the setting time of a dental material is increased, which of the following is true?
A.
B.
C.
D.
28.  When preparing the patient for an impression the operator should:
A.
B.
C.
D.
E.
29.  When taking a maxillary impression, a right handed operator should be standing in which position?
A.
B.
C.
D.
30.  When mixing alginate impression material:
A.
B.
C.
D.
31.  All of the following statements are true about the "working time" of alginate material except one.
A.
B.
C.
D.
32.  The typical mixing time for alginate is ___ and the setting time for regular-set material is ____
A.
B.
C.
D.
33.  Why would the double pour technique be a preferred method of fabricatin a cast/study model?
A.
B.
C.
D.
34.  Which is the best indicator of the inital set of gypsum products?
A.
B.
C.
D.
35.  The overall, combined height of both maxillary and mandibular models should be ____ inches.
A.
B.
C.
D.
36.  Which of the following would be a purpose for using the noneugenol mineral oxide surgical dressing?
A.
B.
C.
D.
37.  The noneugenol zinc oxide dressing is held in place by:
A.
B.
C.
D.
38.  The finished noneugenol zinc oxide dressing placed after flap surgery should be:
A.
B.
C.
D.
39.  Which of the following statements regarding the noneugenol zinc oxide dressing would NOT be included in post surgical instructions following periodontal flap surgery?
A.
B.
C.
D.
40.  All of the following are proceudre that correctly follow removal of the perio dressing EXCEPT:
A.
B.
C.
D.
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