Samples of Questions Examination

• المقرر الدراسي: RDS 213

The reverse "S" curve of the class II amalgam preparation:a.     enhances retention form
b.     makes it easier to restore contact with the proximal tooth
c.     provides a butt joint (90°) of amalgam at the occlusal proximal line
      angle
d.     diminishes resistance form
1)       a, c and b
2)       a, c and d
3)       c only
4)        b and c

2.   Rounding the axio-pulpal line angle will increase the bulk of amalgam
 restoration and prevent stress concentration.
a)             True                     b)    False

3.   Where is the usual position for the beginning lesion for premolars and
molars with respect to the interproximal contact area?
a.     occlusally
b.     lingually
c.     cervically
d.     bucally
e.     none of the above
 
4.         In a class V cavity preparation for amalgam, the axial wall should usually be convex in order to: 
             a.             not to encroach the pulp
             b.             have even depth

 5.       What dictates the external outline form of the class V amalgam cavity  preparation?
                                 Extension of decay
6.         Why will the proximal (mesial and distal) walls of class V amalgam cavity preparation not be parallel?
                                Follow the direction of enamel rods resistance

  7.     The form of a class II cavity preparation for a dental amalgam restoration includes:
a.     extending the cavity to the line angles of the tooth or beyond
b.     extending the cavity proximally to clear contact to the adjacent tooth
c.     beveling all enamel rods
d.     removing unsupported enamel along the gingival wall
e.     rounding the axio pulpal line angle
1)     a, b and c
2)     a, b and d
3)     b, c and e
(4)   b, d and e
5)     c, d and e
6)     all of the above

8.       The occlusal isthmus of an MO dental amalgam restoration is more resistant to fracture if the:
a.                pulpal depth is 1 mm.
b.               occlusal dovetail is present
c.                axio pulpal line angle is rounded
d.               unsupported enamel at the gingival cavosurface face margin is planed

9.          Give two (2) retention features in a class II cavity preparation including the occlusal cavity and proximal box.
                a.             retention grooves, axio-buccal and axio-lingual line angles
                b.             doveetal occlusally, B & L convergence of box walls

10.        In class 1 amalgam preparation on a mandibular first premolar, the pulpal floor should be in a flat plane parallel to a line drown from the tip of the buccal cusp to the tip of the lingual cusp of that tooth.  The reason(s) being:
a.                    to avoid exposing the buccal pulp horn
b.                   to increase retention
c.                    to insure proper depth of the pulpal floor
d.                   to maintain integrity of the marginal ridge

1.                    a, b, c
2.                    a
3.                    a and c
4.                    b and c
5.                    a, b and d
6.                    all of the above