2010 Released Qs And Ans44

Front 1

The vibrating line of the palate is
A. a line or area which marks the
movement of the soft palate.
B. always on the hard palate.
C. a well defined line across the palate.
D. not a useful landmark in complete
denture fabrication.

Back 1

A. a line or area which marks the
movement of the soft palate.

Front 2

One week following the placement of a
small, Class II composite resin, the patient
returns with pulpitis. The most likely
cause is
A. microleakage.
B. hyperocclusion of the restoration.
C. polymerisation expansion of the
restoration.
D. incomplete curing

Back 2

A. microleakage.

Front 3

The pulpal floor of a Class II cavity is cut
perpendicular to the long axis of the tooth
EXCEPT in the
A. maxillary first premolar.
B. maxillary second premolar.
C. mandibular second premolar.
D. mandibular first premolar.

Back 3

D. mandibular first premolar.

Front 4

Which of the following is immediately
distal to the intermaxillary suture?
A. Mandibular central incisor.
B. Mandibular canine.
C. Maxillary central incisor.
D. Maxillary canine.

Back 4

D. Maxillary canine.

Front 5

Trephination is indicated when
A. a soft tissue swelling is fluctuant and
pointing.
B. an acute pulpitis is present.
C. pus is trapped within bone.
D. a chronic periapical lesion is present.

Back 5

C. pus is trapped within bone.

Front 6

The premolar with the occlusal groove
pattern simulating the letter “Y” is the
A. maxillary first premolar.
B. mandibular first premolar.
C. maxillary second premolar.
D. mandibular second premolar.

Back 6

D. mandibular second premolar.

Front 7

Lichen planus occurs most frequently on
the
A. buccal mucosa.
B. tongue.
C. floor of the mouth.
D. gingiva.

Back 7

A. buccal mucosa.

Front 8

The epithelial lining of a radicular cyst is
derived from
A. the epithelial cell rests of Malassez.
B. oral epithelium proliferating apically
from a periodontal pocket.
C. endothelial proliferation of
capillaries in the area.
D. metaplasia of histiocytes and/or
cementoblasts.

Back 8

A. the epithelial cell rests of Malassez.

Front 9

The primordial cyst probably results from
A. cystic degeneration of the stellate
reticulum early in the formation of
the tooth.
B. epithelial remnants in the periodontal
ligament.
C. an extension of pulpal inflammation
after death of the pulp.
D. failure of formation of the enamel
matrix.
E. the dental lamina

Back 9

A. cystic degeneration of the stellate
reticulum early in the formation of
the tooth.

Front 10

Secondary dentin formation may be
stimulated by
A. pulp necrosis.
B. fluorosis.
C. attrition.
D. vitamin D therapy.

Back 10

C. attrition.

Front 11

A 15-year old presents with hypoplastic
enamel on tooth 1.5. All other teeth are
normal. This was most probably caused
by a/an
A. vitamin D deficiency.
B. generalized calcium deficiency.
C. high fever encountered by the patient
when he had measles at age 3.
D. infection of tooth 5.5 during the
development of tooth 1.5.
E. hereditary factor.

Back 11

D. infection of tooth 5.5 during the
development of tooth 1.5.

Front 12

The characteristic colour seen in the
crowns of teeth with internal resorption is
due to
A. deposition of pigment in the cells of
the odontoblast layer.
B. the presence of hyperplastic vascular
pulp tissue.
C. a peculiar change of consistency of
the dentin.
D. an optical phenomenon related to the
difference in the refractive indices of
the normal and affected areas.
E. the degeneration and necrosis of the
pulp tissue.

Back 12

B. the presence of hyperplastic vascular
pulp tissue.

Front 13

Presence of periodontal pockets, increased
tooth mobility, pus formation and bad
breath are most frequently associated with
A. necrotizing ulcerative
periodontitis (NUP).
B. herpetic gingivostomatitis.
C. advanced chronic periodontitis.
D. avitaminosis B complex.
E. aplastic anemia.

Back 13

A. necrotizing ulcerative
periodontitis (NUP).

Front 14

Recurrent herpes labialis is
A. caused by a different organism than
is primary herpetic stomatitis.
B. a form of disease which heals by
scarring.
C. seen more frequently in adult
patients.
D. not a contagious lesion.
E. a venereal disease.

Back 14

C. seen more frequently in adult
patients

Front 15

The radiographic image of the incisive
foramen is located between the roots of
the maxillary
A. incisors above their apices.
B. central and lateral incisors below
their apices.
C. central incisors below their apices.
D. central and lateral incisors above
their apices.

Back 15

C. central incisors below their apices.

Front 16

If hypothyroidism occurs in the adult, it
can be associated with
A. exophthalmos.
B. weight loss.
C. generalized edema.
D. tachycardia.
E. mental defects

Back 16

C. generalized edema.

Front 17

"Tic douloureux" is synonymous with
A. psychogenic facial pain.
B. trigeminal neuralgia.
C. facial paralysis.
D. temporomandibular joint dysfunction
syndrome

Back 17

B. trigeminal neuralgia.

Front 18

Postoperative bleeding in
thrombocytopenic purpura is due to a
deficiency of
A. vitamin C.
B. vitamin K.
C. prothrombin.
D. platelets.

Back 18

D. platelets.

Front 19

Which of the following conditions is most
likely to lead to thrombosis?
A. Stasis of blood.
B. Presence of bacteria in blood.
C. Deficiency of circulating platelets.
D. Increased concentration of plasma.
E. Lowered oxygenation of
hemoglobin.

Back 19

A. Stasis of blood.

Front 20

A decrease in the neutrophil count is
present in
A. granulocytopenia (agranulocytosis).
B. iron deficiency anemia.
C. myeloid leukemia.
D. leukocytosis.
E. thrombocytopenic purpura.

Back 20

A. granulocytopenia (agranulocytosis).

Front 21

In the use of the dental X-ray machine,
patient protection from radiation is MOST
important for
A. patients receiving antibiotics.
B. patients receiving corticosteroids.
C. individuals over fifty-years of age.
D. pregnant women.
E. young adults.

Back 21

D. pregnant women.

Front 22

A stone in the salivary glands or ducts is
called a
A. sialolith.
B. renolith.
C. calcolith.
D. phlebolith.
E. None of the above.

Back 22

A. sialolith.

Front 23

An abnormal decrease in the flow of saliva
is associated with
A. ptyalism.
B. sialomentaplasia.
C. xerostomia.
D. pyroglossia.
E. None of the above.

Back 23

C. xerostomia

Front 24

Unilateral premature eruption of teeth is
characteristic of
A. acromegaly.
B. hemihypertrophy.
C. hemiatrophy.
D. cleidocranial dysostosis.
E. adrenogenital syndrome.

Back 24

B. hemihypertrophy.

Front 25

Which one of the following oral
conditions is NOT caused by a virus?
A. Benign mucous membrane
pemphigoid.
B. Herpetic gingivostomatitis.
C. Leukoplakia.
D. Necrotizing ulcerative gingivitis.

Back 25

D. Necrotizing ulcerative gingivitis.

Front 26

Acute or subacute suppurative
osteomyelitis occurs most frequently in the
A. anterior maxilla.
B. posterior mandible.
C. posterior maxilla.
D. anterior mandible

Back 26

B. posterior mandible.

Front 27

When a diagnosis of a primordial cyst is
made, there is likely to be
A. the normal number of teeth in that
jaw.
B. one less than the normal number of
teeth in that jaw.
C. one more than the normal number of
teeth in that jaw.
D. a squamous cell carcinoma in that
jaw.
E. a primordial cyst situated
symmetrically on the opposite side.

Back 27

B. one less than the normal number of
teeth in that jaw.

Front 28

Fordyce's granules are
A. ectopic sebaceous glands.
B. ectopic sweat glands.
C. small calcified nodules.
D. aberrant mucous glands.

Back 28

A. ectopic sebaceous glands.

Front 29

The normal white cell differential count
for neutrophils is
A. 10-19.
B. 20-29.
C. 30-39.
D. 40-65.
E. 66-90.

Back 29

D. 40-65

Front 30

A biopsy of a clinically suspicious
malignant lesion fails to support the
clinical diagnosis. The most appropriate
management is to
A. assure the patient that there is no
malignancy.
B. take a second biopsy.
C. observe the patient yearly.
D. recall the patient in one month.
E. make a cytological smear.

Back 30

B. take a second biopsy.

Front 31

Radiographically, a primordial cyst will
show
A. mixed radiolucency and radiopacity.
B. a radiolucency around the crown of
an impacted tooth.
C. a radiolucency containing multiple
rudimentary teeth.
D. a radiolucency.
E. None of the above

Back 31

D. a radiolucency.

Front 32

A hemorrhagic bone cyst (traumatic cyst)
is a radiolucency most frequently seen
A. in the mandibular ramus.
B. posteriorly to the maxillary molars.
C. from the symphysis to the ramus of
the mandible.
D. in the maxillary premolar area.
E. None of the above.

Back 32

C. from the symphysis to the ramus of
the mandible.

Front 33

Regardless of the target-film distance
employed for intraoral surveys, the
diameter of the primary beam at the
patient's skin surface should not be greater
than
A. the longest side of the film.
B. the size of the lead diaphragm.
C. 7cm.
D. the size of the filter.

Back 33

C. 7cm.

Front 34

Which of the following combinations of
milliamperage and kilovoltage will give
X-radiation with the maximum
penetration?
A. 10kVp - 65ma
B. 85kVp - 5ma
C. 90kVp - 10ma
D. 65kVp - 15ma
E. 75kVp - 40ma

Back 34

C. 90kVp - 10ma

Front 35

Intensifying screens are used when
exposing extra-oral radiographic films to
A. improve detail.
B. decrease exposure time.
C. decrease scatter radiation.
D. increase the quantity of X-rays
necessary to produce a certain
photographic effect on silver.
E. None of the above.

Back 35

B. decrease exposure time.

Front 36

A zinc phosphate cement base
A. has the same radiopacity as amalgam.
B. is less radiopaque than amalgam.
C. has the same radiopacity as gold.
D. cannot be seen on a radiograph.

Back 36

B. is less radiopaque than amalgam.

Front 37

Bitewing radiographs are most valuable
for detecting
A. hyperemia of the pulp.
B. occlusal carious lesions.
C. proximal surface caries.
D. cervical caries

Back 37

C. proximal surface caries.

Front 38

Papillary hyperplasia under a denture is
usually due to (an)
A. moniliasis.
B. ill fitting denture.
C. allergy to denture cleanser.
D. avitaminosis.

Back 38

B. ill fitting denture.

Front 39

Difficulty in mouth opening, dysphagia,
tongue stiffness and generalized
induration of the skin are characteristic of
A. lupus erythematosus.
B. scleroderma.
C. erythema multiforme.
D. lichen planus.
E. malignant disease.

Back 39

B. scleroderma.

Front 40

A radiopaque area within the alveolar
process containing several rudimentary
teeth suggests a/an
A. periapical cemental dysplasia.
B. ameloblastoma.
C. compound odontoma.
D. complex odontoma.
E. Pindborg tumor.

Back 40

C. compound odontoma.

Front 41

Which of the following conditions
produces a radiolucent image?
A. Sialolithiasis.
B. Osteosclerosis.
C. Odontoma.
D. Internal resorption.
E. None of the above.

Back 41

D. Internal resorption.

Front 42

Digitalis is prescribed for the treatment of
A. nephritis.
B. angina pectoris.
C. coronary occlusion.
D. congestive heart failure.
E. None of the above.

Back 42

D. congestive heart failure.

Front 43

A circumscribed radiolucent area at the
apex of a vital mandibular incisor is
indicative of
A. periapical abscess.
B. periapical cemental dysplasia.
C. granuloma.
D. radicular cyst.
E. follicular cyst.

Back 43

B. periapical cemental dysplasia.

Front 44

Which of the following is most
radiopaque?
A. Calcifying odontogenic cyst.
B. Fibrous dysplasia of bone.
C. Ameloblastoma.
D. Complex composite odontoma

Back 44

D. Complex composite odontoma

Front 45

Basal cell carcinoma
A. metastasizes to the submental lymph
nodes.
B. metastasizes to the submaxillary
lymph nodes.
C. metastasizes to the cervical lymph
nodes.
D. metastasizes to the pre-auricular
lymph nodes.
E. does not normally metastasize.

Back 45

E. does not normally metastasize.

Front 46

The tissue which cannot be seen on dental
radiographs is
A. dentin.
B. enamel.
C. cementum.
D. pulp.
E. periodontal ligament.

Back 46

C. cementum.

Front 47

If the image of a supernumerary tooth
appears in a second radiograph to have
shifted distally from the position shown on
the original radiograph, this indicates that
the supernumerary tooth lies
A. buccal to the premolars.
B. lingual to the premolars.
C. on the same plane as the premolars.
D. mesial to the premolars.
E. distal to the premolars.

Back 47

B. lingual to the premolars.

Front 48

The lamina dura is
A. cortical bone.
B. spongy bone.
C. immature bone.
D. a cribiform plate perforated by
nutrient canals.
E. None of the above.

Back 48

D. a cribiform plate perforated by
nutrient canals

Front 49

It is possible to misdiagnose the midline
palatal suture as a
A. fracture.
B. palatal cyst.
C. granuloma.
D. abscess.

Back 49

A. fracture.

Front 50

Ameloblastomas originate from the
A. odontogenic epithelium.
B. mucous cysts.
C. epithelial rests of Malassez.
D. neural crest cells.

Back 50

A. odontogenic epithelium.