MDS PREP
Compared to lathe cut alloy, spherical dental amalgam alloy
1) Require less amalgamation time
2) Require higher forces for condensation
3) Require more mercury for trituration
4) Have longer setting times
Conservative Dentistry
Answer: 1
During the isthumus preparation for a MOD cavity, it extends beyond 1/3rd the intercuslpal distance and cusp is undermined. Restoration of choice is
1) MOD amalgam
2) MOD inlay
3) MOD onlay
4) Full crown
Conservative Dentistry
Answer: 3
Retentive grooves in the proximal box for a class II amalgam should be
1) Sharp elongated at dentinoenamel junction
2) Sharp elongated placed in the dentin
3) Round elongated in the dentin
4) Round and short in the dentin
Conservative Dentistry
Answer: 3
For maximum strength, amalgam should have
1) Maximum of matrix phase and minimum of gamma phase
2) Maximum of gamma phase and maximum of gamma II phase
3) Maximum of gamma phase and minimum of matrix phase
4) Maximum of gamma II phase and minimum of gamma phase
Conservative Dentistry
Answer: 3
The distal wall (axial wall) in MO class II cavity for amalgam
1) Right angles to the pulpal wall
2) Obtuse angles to the pulpal wall
3) Acute angles to the pulpal wall
4) No axial wall at all
Conservative Dentistry
Answer: 2
Which of the following is not a pulpal irritant
1) Phenol
2) Silver nitrate
3) Prednisone
4) Chloroform
Conservative Dentistry
Answer: 3
The most common cause of the fracture at the insthumus region in class II amalgam cavities
1) Rounded axiopulpal line angle
2) Inadequate depth of the cavity
3) Inadequate width of the cavity
4) Delayed expansion
Conservative Dentistry
Answer: 2
Surface hardness of gold foil during condensation
1. Always increases
2. Always decreases
3. Increased followed by a decrease
4. Not correlated