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Flashcards in Sample Questions 2009 Deck (160)
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1

Carcinoma in situ implies that the lesion shows:

a) encapsulation of cell mass
b) metastasis of malignant cells
c) dysplasia of cells confined within the epithelium
d) extensive invasion of malignant cells to surrounding tissue

C) DYSPLASIA OF CELLS CONFINED WITHIN THE EPITHELIUM

2

Gingival curettage serves to do each of the following EXCEPT one. Which one is the EXCEPTION?

a) to shrink shallow pockets
b) to reduce fibrotic tissue
c) to remove ulcerated epithelium
d) to improve tissue tone

B) TO REDUCE FIBROTIC TISSUE

3

Inadvertent soft-tissue curettage removes which of the following?

a) Oral epithelium
b) Sulcular epithelium
c) Cervical fibers of the periodontal ligament
d) Horizontal fibers of the periodontal ligament

B) SULCULAR EPITHELIUM

4

Which of the following conditions occurs more often in women than in men?

a) Cirrhosis
b) Oral cancer
c) Rheumatoid arthritis
d) Pancreatic cancer
e) Atherosclerosis

C) RHEUMATOID ARTHRITIS

5

A maxillary left lateral incisor has a 7-mm pocket on the mid-palatal aspect of the tooth. Which of the following represents the most likely secondary etiologic agent involved in the formation of this pocket?

a) Enamel pearl
b) Accessory canal
c) Overhanging restoration
d) Palatal gingival groove
e) Cervical enamel projection

D) PALATAL GINGIVAL GROOVE

6

Scavenger systems in nitrous oxide/oxygen sedation equipment function to:

a) minimize gas leakage
b) collect the gas for re-use
c) reduce microbial contamination
d) eliminate errors in the tank hook-up
e) limit the concentration of the mixture

D) ELIMINATE ERRORS IN THE TANK HOOK-UP

7

The median palatine raphe is found on the:

a) uvula
b) oropharynx
c) hard palate
d) soft palate

C) HARD PALATE

8

An accumulation of which of the following cells suggests that a patient has had an immunologic response to plaque?

a) Lymphocytes
b) Macrophages
c) Mast cells
d) Monocytes
e) Neutrophils

A) LYMPHOCYTES

9

The tensor veli palatini muscle is innervated by which of the following nerves?

a) Maxillary division of the trigeminal
b) Mandibular division of the trigeminal
c) External laryngeal branch of the vagus
d) Internal laryngeal branch of the vagus

B) MANDIBULAR DIVISION OF THE TRIGEMINAL

10

Which of the following represents the recommended millimeter thickness of lead for a protective lead apron?

a) 0.10
b) 0.15
c) 0.20
d) 0.25
e) 0.30

D) 0.25

11

Following gingival curettage, healing begins with (a):

a) collagenation
b) lymphocytic infiltration
c) blood clot formation
d) mitosis of epithelial cells
e) fibroblastic proliferation and capillary budding

C) BLOOD CLOT FORMATION

12

The most predominant WBC in the healing gingiva 12 hours after soft tissue cartilage is the:

a) basophil
b) mast cell
c) neutrophil
d) eosinophil
e) macrophage

C) NEUTROPHIL

13

In pregnancy gingivitis, which of the following bacteria would you expect to see in increased numbers?

a) Actinobacillus actinomycetemcomitans
b) Prevotella intermedia
c) Streptococcus mutans
d) Actinomyces israelii
e) Capnocytophaga

B) PREVOTELLA INTERMEDIA

14

If the clinical attachment level and the probing depth measurements of a tooth were equal, then the margin of the gingival tissue would be located:

a) apical to the contact point.
b) coronal to the contact point.
c) at the cementoenamel junction.
d) apical to the cementoenamel junction.
e) coronal to the cementoenamel junction.

C) AT THE CEMENTOENAMEL JUNCTION

15

Which of the following medications used to prevent rejection in patients with solid organ transplant might result in gingival overgrowth?

a) Prednisone (Sterapred)
b) Cyclosporine (Neoral)
c) Azathioprine (Imuran)
d) Cyclophosphamide (Cytoxan)
e) Phenytoin (Dilantin)

B) CYCLOSPORINE (NEORAL)

16

A carious developmental pit is most likely found on the lingual surface on a:

a) mandibular central incisor.
b) mandibular lateral incisor.
c) maxillary canine.
d) maxillary central incisor.
e) maxillary lateral incisor.

E) MAXILLARY LATERAL INCISOR

17

The only frenulum which does NOT contain any muscle fibers is the:

a) lingual.
b) maxillary.
c) mandibular.
d) buccinator.

B) MAXILLARY

18

A patient presents with necrotizing ulcerative gingivitis. Which of the following microorganisms most likely predominate?

a) Gram-(+) rods
b) Gram-(-) cocci
c) Spirilla and Porphyromonas gingivalis
d) Spirochetes and Prevotella intermedia
e) Fusobacteria and filamentous rods

D) SPIROCHETES AND PREVOTELLA INTERMEDIA

19

Nutrients are carried throughout all tissues of the human body by which of the following systems?

a) Digestive
b) Lymphatic
c) Excretory
d) Circulatory
e) Respiratory

D) CIRCULATORY

20

Which of the following cysts forms around the crown of an impacted tooth?

a) Residual
b) Primordial
c) Periapical (Radicular)
d) Dentigerous (Follicular)
e) Odontogenic

D) DENTIGEROUS (FOLLICULAR)

21

Soft tissue gingival curettage is most likely to cause which of the following?

a) Shrinkage
b) Reattachment
c) A decrease in fibrotic tissue
d) Rekeratinization

A) SHRINKAGE

22

The uptake of water in a reversible hydrocolloid is by:

a) syneresis.
b) hysteresis.
c) imbibition.
d) absorption.
e) adsorption.

C) IMBIBITION

23

A composite resin restoration has a gingival overhang. This defect can most easily be identified by:

a) exploration.
b) radiographs.
c) transillumination.
d) visual inspection.
e) disclosing solution.

A) EXPLORATION

24

A patient indicates on her medical history that she frequently takes aspirin. Which of the following reasons best describes why a dental hygienist should question the patient further about her use of aspirin?

a) Interfere with the effectiveness of antibiotics.
b) Cause an elevation in the patient's blood pressure.
c) Increase blood clotting time if taken recently.
d) Increase the possibility of a post-treatment infection.
e) Interfere with the effectiveness of oral contraceptives.

C) INCREASE BLOOD CLOTTING TIME IF TAKEN RECENTLY

25

Each of the following is a recommended chemical disinfectant EXCEPT one. Which one is the EXCEPTION?

a) Iodophor
b) Isopropanol
c) Glutaraldehyde
d) Chlorine dioxide
e) Sodium hypochlorite

B) ISOPROPANOL

26

The lymphatics draining the maxillary teeth usually empty directly into which of the following nodes?

a) Parotid
b) Sublingual
c) Deep cervical
d) Submandibular
e) Superficial cervical

D) SUBMANDIBULAR

27

Which of the following muscles is attached to the articular disc?

a) Masseter
b) Mylohyoid
c) Temporalis
d) Medial pterygoid
e) Lateral pterygoid

E) LATERAL PTERYGOID

28

The crevicular epithelium of a periodontal pocket consistently differs from that seen in normal gingiva. Which of the following describes the epithelial lining of a periodontal pocket?

a) Thicker
b) Atrophic
c) Ulcerative
d) Keratinized

C) ULCERATIVE

29

The mandibular condyle is different from most other joints because the articular surface is covered with which of the following?

a) Elastic cartilage
b) Synovial membrane
c) Hyaline cartilage
d) Fibrous connective tissue

D) FIBROUS CONNECTIVE TISSUE

30

Vasoconstrictors are combined with local anesthetics for all of the following reasons EXCEPT one. Which one is the EXCEPTION?

a) Reduce toxicity.
b) Prolong duration of action.
c) Reduce rate of vascular absorption.
d) Increase concentration at the nerve membrane.
e) Prevent penetration at the nerve membrane.

E) PREVENT PENETRATION AT THE NERVE MEMBRANE