Dental Materials Midterm 10/21 (200
Questions)
Which statement is NOT true about cleaning instruments after patient care?
Presoak solutions are to be whenever timely cleaning is not possible.
Enzymatic cleaners digest blood proteins and other debris.
Ultrasonic cleaning is necessary for visibly soiled instruments only.
Hand scrubbing is not advised due to increased risk of splatter. - ANS Ultrasonic cleaning is necessary for
visibly soiled instruments only.
A __________ is designed for the purpose of preventing orofacial injury.
Tooth positioner
Nonnutritive sucking appliance
Athletic mouthguard
Sleep apnea appliance - ANS Athletic mouthguard
A __________ mm depth of alginate should extend beyond the occlusal surface in a properly fitting
impression tray.
1 to 2
2 to 3
3
3 to 4 - ANS 2 to 3
A dental material that is classified by longevity of use includes all of the following EXCEPT:
,Temporary restoration
Permanent restoration
Partial restoration
Interim restoration - ANS Partial restoration
A metal matrix band and retainer would most likely be used to place a class_____restoration.
I
II
III
IV
V - ANS II
A(n) __________ reaction is one that gives off heat during the chemical reaction.
Endothermic
Exothermic
Progressing
Monomer - ANS Exothermic
Acid etchant is most commonly which percentage of orthophosphoric acid?
30%
35%
,37%
40% - ANS 35%
After dispensing patient-applied whitening agents for a second round of tooth whitening, when should
the follow-up appointment occur?
1 to 2 weeks
2 to 4 weeks
2 to 3 weeks
3 to 4 weeks - ANS 2 to 4 weeks
After placement, the sealant should be checked for:
Hyperocclusion of occlusal contacts
Interproximal contacts bonded together
Both
Neither - ANS Both
Alginate impression material takes how long to set?
3 to 4 minutes
1 to 2 minutes
2 to 3 minutes
4 to 5 minutes - ANS 3 to 4 minutes
Alginate powder should be allowed to settle for how long after fluffing?
, 10 seconds
15 seconds
30 seconds
60 seconds - ANS 30 seconds
Amalgam __________ is the removal of marginal irregularities, and all surfaces are smoothed.
Smoothing
Carving
Finishing
Polishing - ANS Finishing
Amalgam is strongest in_____strength after it has set.
Shear
Tensile
Compressive
Bending - ANS Compressive
Amalgam may be used for a variety of restorative procedures. ALL of the following pertain to the use of
amalgam EXCEPT:
Good service to patients at a reasonable cost
For cingulum pit areas on the lingual of anterior teeth
Amalgam cores
Questions)
Which statement is NOT true about cleaning instruments after patient care?
Presoak solutions are to be whenever timely cleaning is not possible.
Enzymatic cleaners digest blood proteins and other debris.
Ultrasonic cleaning is necessary for visibly soiled instruments only.
Hand scrubbing is not advised due to increased risk of splatter. - ANS Ultrasonic cleaning is necessary for
visibly soiled instruments only.
A __________ is designed for the purpose of preventing orofacial injury.
Tooth positioner
Nonnutritive sucking appliance
Athletic mouthguard
Sleep apnea appliance - ANS Athletic mouthguard
A __________ mm depth of alginate should extend beyond the occlusal surface in a properly fitting
impression tray.
1 to 2
2 to 3
3
3 to 4 - ANS 2 to 3
A dental material that is classified by longevity of use includes all of the following EXCEPT:
,Temporary restoration
Permanent restoration
Partial restoration
Interim restoration - ANS Partial restoration
A metal matrix band and retainer would most likely be used to place a class_____restoration.
I
II
III
IV
V - ANS II
A(n) __________ reaction is one that gives off heat during the chemical reaction.
Endothermic
Exothermic
Progressing
Monomer - ANS Exothermic
Acid etchant is most commonly which percentage of orthophosphoric acid?
30%
35%
,37%
40% - ANS 35%
After dispensing patient-applied whitening agents for a second round of tooth whitening, when should
the follow-up appointment occur?
1 to 2 weeks
2 to 4 weeks
2 to 3 weeks
3 to 4 weeks - ANS 2 to 4 weeks
After placement, the sealant should be checked for:
Hyperocclusion of occlusal contacts
Interproximal contacts bonded together
Both
Neither - ANS Both
Alginate impression material takes how long to set?
3 to 4 minutes
1 to 2 minutes
2 to 3 minutes
4 to 5 minutes - ANS 3 to 4 minutes
Alginate powder should be allowed to settle for how long after fluffing?
, 10 seconds
15 seconds
30 seconds
60 seconds - ANS 30 seconds
Amalgam __________ is the removal of marginal irregularities, and all surfaces are smoothed.
Smoothing
Carving
Finishing
Polishing - ANS Finishing
Amalgam is strongest in_____strength after it has set.
Shear
Tensile
Compressive
Bending - ANS Compressive
Amalgam may be used for a variety of restorative procedures. ALL of the following pertain to the use of
amalgam EXCEPT:
Good service to patients at a reasonable cost
For cingulum pit areas on the lingual of anterior teeth
Amalgam cores
