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50 Cards in this Set

  • Front
  • Back
In a normally developing occlusion,
spaces between deciduous or permanent
incisors are called
A. physiological spaces.
B. primate spaces.
C. leeway spaces.
D. freeway spaces.
A. physiological spaces.
Mandibular growth
A. is sustained over a longer period of
time in girls.
B. is sustained over a longer period of
time in boys.
C. occurs at the same chronologic age in
both sexes.
D. occurs two years earlier in boys than
in girls.
B. is sustained over a longer period of
time in boys.
Hypothyroidism affects the dental
developmental pattern by
A. interfering with jaw growth.
B. delaying the eruption timetable.
C. causing sclerotic bone to form over
the occlusal surface of erupting teeth.
D. accelerating the eruption timetable.
B. delaying the eruption timetable.
A single tooth anterior crossbite found in a
9 year old should
A. self-correct.
B. be treated with a removable
appliance.
C. have 2 arch orthodontic treatment.
D. be treated in the complete permanent
dentition.
E. be observed and treated when the
cuspids have erupted.
B. be treated with a removable
appliance.
If a patient loses a maxillary first
permanent molar before the age of 10 the
A. premolar drifts distally.
B. maxillary second molar erupts and
moves forward.
C. opposing tooth erupts into the space
created.
D. overbite increases.
B. maxillary second molar erupts and
moves forward.
The Frankfort plane
1. extends from the Porion to the
Orbitale.
2. is parallel with the maxillary plane.
3. describes the cranial base dimensions.
1. extends from the Porion to the
Orbitale.
The facial profile associated with a
Class III malocclusion is
A. concave.
B. convex.
C. either concave or convex.
D. straight.
A. concave.
An 11-year old child has an open bite
caused by active thumbsucking. You
would
A. insert a habit-breaking appliance.
B. refer to a psychologist for evaluation.
C. encourage the child to accept help in
discontinuing the habit and observe
periodically.
D. refer to an orthodontist.
D. refer to an orthodontist.
A space maintainer in the posterior
segment will:
A. prevent extrusion of opposing teeth.
B. prevent the eruption of the
permanent teeth.
C. retard eruption of the permanent
teeth.
D. maintain arch length.
D. maintain arch length.
Occipital and/or cervical extra-oral
anchorage is used to
1. restrict anterior tooth movement.
2. enhance maxillary forward growth.
3. enhance mandibular forward growth.
4. encourage anterior tooth movement.
5. restrict maxillary forward growth.
1. restrict anterior tooth movement.
5. restrict maxillary forward growth.
The roots of the first permanent molar
should be completely formed by the age of
A. six years.
B. seven years.
C. nine years.
D. eleven years.
E. thirteen years.
D. eleven years.
As the mandible grows downward and
forward, bone deposition takes place
A. on all surfaces of the mandible.
B. on the posterior border of the ramus.
C. on the anterior border of the ramus.
D. on the alveolar margins.
B. on the posterior border of the ramus.
D. on the alveolar margins.
Cartilage grows by
A. interstitial growth.
B. appositional growth.
C. both appositional and interstitial
growth.
D. None of the above.
C. both appositional and interstitial
growth.
Bone elements (Wolff's law of bone) will
A. rearrange themselves in the direction
of functional pressures.
B. increase their mass to reflect
functional stress.
C. decrease their mass to reflect
functional stress.
D. All of the above.
D. All of the above.
The roots of primary molars in the absence
of their permanent successors
1. sometimes are partially resorbed and
become ankylosed.
2. may remain for years with no
significant resorption.
3. may remain for years partially
resorbed.
4. are always resorbed.
1. sometimes are partially resorbed and
become ankylosed.
2. may remain for years with no
significant resorption.
3. may remain for years partially
resorbed.
The primary stimulus for growth of the
mandible is
A. genetic.
B. epigenetic.
C. environmental.
D. functional.
A. genetic.
D. functional.
A patient who is jaundiced because of
liver disease has an increased risk of
1. postextraction bleeding.
2. cardiac arrest.
3. postoperative infection.
4. anaphylactic shock.
1. postextraction bleeding.
3. postoperative infection.
Which of the following factors is(are)
related to a malocclusion caused by
thumbsucking?
A. Duration.
B. Frequency.
C. Intensity.
D. All of the above.
D. All of the above.
Gigantism is caused by
A. a hyperactive thyroid.
B. atrophy of the posterior pituitary.
C. hyperplasia of the anterior pituitary.
D. hyperplasia of the parathyroids.
E. None of the above.
C. hyperplasia of the anterior pituitary.
Maxillary midline diastema can be caused
by
1. a mesiodens.
2. congenitally missing lateral incisors.
3. a tongue thrust habit.
4. a thumb-sucking habit.
E. All of the above.
Alveolar bone is undergoing remodeling
A. through the primary dentition.
B. until the end of mixed dentition.
C. until the complete eruption of
permanent teeth.
D. throughout life.
D. throughout life.
In a patient who has prematurely lost
deciduous molars, you would establish the
Angle classification by
A. profile.
B. molar relation.
C. canine relation.
D. incisor relation.
E. midline relation.
C. canine relation.
In an otherwise acceptable occlusion, an
impacted maxillary canine
A. could be extracted.
B. could be retained and the first
premolar removed to allow the
canine to erupt.
C. could be surgically exposed to speed
its eruption.
D. constitutes a problem requiring
consultation with an orthodontist.
E. All of the above.
E. All of the above.
Primary herpetic lesions of the oral cavity
are MOST LIKELY to occur during
A. 1 to 5 years.
B. 6 to 12 years.
C. 13 to 16 years.
D. Any age.
A. 1 to 5 years.
During orthodontic treatment, poor oral
hygiene may result in
1. marginal gingivitis.
2. gingival fibrosis.
3. ulcerative gingivitis.
4. acute periodontitis.
5. juvenile periodontitis.
1. marginal gingivitis.
2. gingival fibrosis.
A single hypoplastic defect located on the
labial surface of a maxillary central incisor
is most likely due to a/an
A. dietary deficiency.
B. endocrine deficiency.
C. tetracycline therapy.
D. trauma to the maxillary primary
central incisor.
E. high fluoride intake.
D. trauma to the maxillary primary
central incisor.
The term "dental age" refers to the
A. state of dental maturation.
B. eruption time of a given tooth.
C. number of years elapsed since a
given tooth erupted.
D. None of the above.
A. state of dental maturation.
A 3 year old requires the extraction of a
deciduous maxillary second molar. The
local anesthetic technique of choice is
A. a posterior superior alveolar block.
B. buccal and palatal infiltration.
C. a tuberosity block plus subperiosteal
infiltration of the mesio-buccal root.
D. an infra-orbital block.
B. buccal and palatal infiltration
The mechanism of adjustment to maintain
the shape and proportions of bone
throughout its growth period is called
A. remodeling.
B. cortical drift.
C. area relocation.
D. translatory growth.
A. remodeling.
The cause of a cleft lip is failure of the
union of the
A. maxillary processes.
B. maxillary and lateral nasal processes.
C. palatine processes.
D. All of the above.
E. None of the above.
E. None of the above.
The most frequent cause of malocclusion
is
A. thumbsucking.
B. mouth breathing.
C. heredity.
D. ectopic eruption.
C. heredity.
A diastema between two maxillary central
permanent incisors could be
A. normal.
B. associated with the absence of
permanent maxillary lateral incisors.
C. associated with a large labial frenum.
D. All of the above.
D. All of the above.
Orthodontic tooth movement in an
adolescent is easier than an adult because
of
A. differences in tissue/bone reaction.
B. differences in growth.
C. differences in cooperation.
D. all of the above.
B. differences in growth.
Labioversion of maxillary incisor teeth is
associated with
A. thumbsucking.
B. spaced maxillary incisor teeth.
C. lack of normal tonicity of the labial
musculature.
D. All of the above.
D. All of the above.
Premature loss of mandibular deciduous
cuspids in Class I and Class II cases
results in increased
1. overjet.
2. arch width.
3. overbite.
4. leeway space.
1. overjet.
3. overbite.
The maxillary incisors in Angle's Class II,
Division 2 malocclusion are in
A. linguoversion.
B. labioversion.
C. infraversion.
D. supreversion
A. linguoversion.
The interocclusal relationship of the
primary second molars
1. does not affect the resultant
permanent molar relationship.
2. is normal if there is a flush terminal
plane.
3. determines the amount of leeway
space.
4. may aid in the prediction of
permanent tooth malocclusion.
2. is normal if there is a flush terminal
plane.
4. may aid in the prediction of
permanent tooth malocclusion.
Discomfort during orthodontic therapy
could be a result of
A. a low pain threshold.
B. poorly adjusted appliances.
C. heavy forces.
D. All of the above.
D. All of the above.
The radiologic change most suggestive of
multiple myeloma is
A. multiple radiolucent lesions.
B. multiple radiopaque lesions.
C. diffuse “ground glass” appearance.
D. generalized hypercementosis.
A. multiple radiolucent lesions.
The objective of scaling and root planing
during periodontal therapy is to remove
1. plaque.
2. calculus.
3. crevicular epithelium.
4. contaminated cementum.
E. All of the above.
A facebow is used to record the
1. vertical dimension of occlusion.
2. inter-occlusal relationship.
3. horizontal condylar inclination.
4. relationship of the maxilla to the
hinge axis.
4. relationship of the maxilla to the
hinge axis.
Which of the following is/are essential
when using spherical rather than admix
alloy for a routine amalgam restoration?
1. a larger diameter condenser.
2. an anatomical wedge.
3. decreased condensing pressure.
4. a dead soft matrix band.
E. All of the above.
Highly filled, hybrid, posterior composite
resins are CONTRAINDICATED as a
posterior restorative material in cases of
1. cusp replacement.
2. bruxism.
3. lack of enamel at the gingival cavosurface
margin.
4. inability to maintain a dry operating
field.
E. All of the above.
A 7 year old presents having just lost a
maxillary permanent central incisor due to
trauma. The tooth cannot be found. The
treatment of choice is to
1. order a chest x-ray.
2. place an implant.
3. maintain space with a removable
appliance.
4. observe and measure the space for
6 months.
1. order a chest x-ray.
3. maintain space with a removable
appliance.
Which of the following fibre groups are
attached to bone?
1. Apical.
2. Oblique.
3. Alveolar crest.
4. Circular.
1. Apical.
2. Oblique.
3. Alveolar crest.
In health, attached gingiva
A. is bound firmly by the periosteum to
the alveolar bone.
B. is attached by collagen fibres to the
cementum.
C. displays varying degrees of stippling.
D. has a keratinized surface.
E. All of the above.
E. All of the above.
The oral mucosa covering the base of the
alveolar bone
A. is normally non-keratinized but can
become keratinized in response to
physiological stimulation.
B. is closely bound to underlying
muscle and bone.
C. does not contain elastic fibres.
D. merges with the keratinized gingiva
at the mucogingival junction.
E. has a tightly woven dense
collagenous corium.
D. merges with the keratinized gingiva
at the mucogingival junction.
Maintenance care for a patient treated for
periodontal disease includes periodic
assessment of
1. tooth mobility.
2. gingival sulcus depth.
3. signs of gingival inflammation.
4. oral hygiene status.
E. All of the above.
Which one of the following statements is
FALSE?
A. Stippling in healthy gingiva varies
with location.
B. Healthy gingiva does not bleed.
C. The interdental papillae in the
posterior regions are broader than in
the anterior region.
D. Healthy gingiva is bright red in
color.
D. Healthy gingiva is bright red in
color.
When performing a functional analysis of
occlusion, the mandible may be observed
to exhibit a shift from centric relation to
centric occlusion in all but one of the
following directions:
A. forward.
B. backward.
C. upward.
D. lateral.
B. backward.