Powers: Dental Materials, 10th Edition
Chapter 03: Preventive Dental Materials
Test Bank
MULTIPLE CHOICE
ANS: B
REF: Pg. 29
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ANS: C
ANS: A
ANS: E
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ANS: D
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SHORT ANSWER
ANS:
Current evidence indicates that sealants should not be used on the teeth of a patient who does not cooperate in maintaining good oral hygiene, on occlusal surfaces where pits and fissures do not exist, on teeth that have been free of caries for several years, and on teeth with many proximal lesions.
One concern is what happens to dental caries that are purposely or inadvertently left beneath sealed pits and fissures. Several studies have reported that the number of cultivable microorganisms from carious dentin left in situ in sealed pits and fissures for up to 5 years was considerably less than before sealant was applied. Sealing a suspected carious pit and fissure appears to be a reasonable clinical service if appropriate clinical observation is maintained.
Chapter 05: Dental Amalgam
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This phases remains in a high-copper amalgam setting.
Gamma-2 () is absent in a high-copper amalgam.
REF: Pgs. 57-58
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The overall dimensional change of an amalgam restoration is determined by the sum of:
REF: Pg. 63
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