Periodontics, Preparation for NBDE Part II

  • Category: Periodontics
  • Aim: Revising for NBDE Part II
  • Questions: 25
  • Hint: No
  • Mutiple Opportunites: No
  • Time Limit: No
  • Answer Explaining: Yes

Periodontics

Congratulations - you have completed Periodontics. You scored %%SCORE%% out of %%TOTAL%%. Your performance has been rated as %%RATING%%
Your answers are highlighted below.
Question 1
Which class of bony defect responds best to regenerative therapy?
A
One-walled
B
Two-walled
C
Three-walled
D
Shallow crater
Question 1 Explanation: 
C. Three-walled defects respond best to regenerative therapy.
Question 2

Which of the following is am important constituent of gram-negative microorganisms that contributes to initiation, of the host inflammatory response?

A
Exotoxin
B
Lipoteichoic acid
C
Endotoxin
D
Peptidoglycan
Question 2 Explanation: 
C. Endotoxin or lipopolysaccharide is an important constituent of the gram-negative outer membrane that contributes to initiation of the host inflammatory response.
Question 3

Polymorphisms in which of the following genes have been associated with severe chronic periodontitis ?

A
IL-6
B
IL-1
C
TNF
D
PGE2
Question 3 Explanation: 
B. Polymorphisms in the IL-1 genes have been associated with severe chronic periodontitis.
Question 4
Which of the following is most important in determining the prognosis for a tooth?
A
Probing pocket depth
B
Bleeding on probing
C
Clinical attachment level
D
Level of alveolar bone
Question 4 Explanation: 
C. The amount of clinical attachment loss is most important in determining the prognosis. Deep pocket depths and bleeding on probing can be found in both gingivitis and periodontitis. Although the level of alveolar bone is usually con¬sistent with the amount of clinical attachment loss, there are circumstances under which these two measures are not comparable.
Question 5

Which of the following are part of Preliminary Phase therapy?

a. Treatment of emergencies b. Extraction of hopeless teeth c. Plaque control d. Removal of calculus
A
a, b, and c
B
b, c, and d
C
a and b only
D
b and d only
Question 5 Explanation: 
C. Preliminary Phase therapy is used to treat emergencies and remove hopeless teeth.
Question 6

Which of the following are antigen-presenting cells?

A
Neutrophils
B
T-lymphocytes
C
Macrophages
D
Plasma cells
Question 6 Explanation: 
C. Neutrophils are one of the primary defense cells of the Innate immune system. T-lymphocytes are important activators of the specific (adaptive) immune system. Macrophages are antigen- presenting cells. Plasma cells produce anti¬bodies.
Question 7
The inorganic component of subgingival plaque is derived from ____.
A
Bacteria
B
Saliva
C
Gingival crevicular fluid
D
Neutrophils
Question 7 Explanation: 
C. Saliva is the source of inorganic components (calcium, phosphorous) for supraginglval plaque. Gingival crevicular fluid is the source of inorganic components of subgingival plaque.
Question 8

In general, what species are predominant in supragingival tooth-associated attached plaque?

A
Gram-negative rods and cocci
B
Gram-negative filaments
C
Gram-positive filaments
D
Gram-positive rods and cocci
Question 8 Explanation: 
D. Supraginglval plaque Is either tooth-associated or outer layer. Tooth-associated Is composed pri- manly of gram-positive cocci and short rods.
Question 9
Offset angulation is a characteristic feature of
A
Sickle scalers
B
Universal curettes
C
Area-specific curettes
D
Chisels
Question 9 Explanation: 
C. Sickle scalers and universal curettes do not have offset angulation of the blade. The working ends of area-specific curettes are offset at a 60-degree angle relative to the terminal shank. The working ends of sickle scalers and universal curettes are not offset—they are at a 90-degree angle relative to the terminal shank.
Question 10
For most periodontitis-affected patients, what is the recommended interval for maintenance appointments?
A
1 month
B
3 months
C
6 months
D
1 year
Question 10 Explanation: 
B. The majority of patients who have been treated for periodontitis should be seen at 3-month intervals for supportive periodontal therapy (maintenance).
Question 11
The distance from the CEJ to the base of the pocket is a measure of ____
A
Clinical attachment level
B
Gingival recession
C
Probing pocket depth
D
Alveolar bone loss
Question 11 Explanation: 
A. The periodontal examination includes probing pocket depth (distance from the gingival margin to the base of the pocket) and clinical attach¬ment level (distance from the CEJ to the base of the pocket). Both of these measures are made using a periodontal probe. Gingival recession can be measured as the distance from the CEJ to the free gingival margin. Alveolar bone loss is meas¬ured radiographically.
Question 12

Restoration margins are plaque-retentive and produce the most inflammation when they are located

A
Supragingival
B
Subgingival
C
At the level of the gingival margin
D
On buccal surfaces of teeth
Question 12 Explanation: 
B. Supraginglval margins are least detrimental to the gingival tissues; subgingival margins are the most detrimental due to the accumulation of dental plaque.
Question 13

Your examination, reveals a probing pocket depth of 6 mm on the facial of tooth 30. The free gingival margin is 2 mm apical to the CEJ (there is 2-mm recession on the facial% How much attachment loss has there been on the facial of this tooth?

A
6 mm
B
2 mm
C
8 mm
D
4 mm
Question 13 Explanation: 
C. When the free gingival margin Is apical to the CEJ, recession has occurred. Attachment loss is the measure from the CEJ to the base of the peri¬odontal pocket. With the free gingival margin 2 mm apical to the CEJ and the probing pocket depth measurement 6 mm, there has been 8 mm loss of attachment.
Question 14
Patients with which of the following should not he treated with ultrasonic instruments?
A
Deep periodontal pockets
B
Edematous tissue
C
Infectious diseases
D
Controlled diabetes
Question 14 Explanation: 
C. Patients with active infectious diseases should not be treated with ultrasonic instruments because of the aerosol that is created when using this type of instrument.
Question 15
Dental wear caused by tooth-to-tooth contact is ____
A
Abrasion
B
Attrition
C
Erosion
D
Abfraction
Question 15 Explanation: 
B. Wasting diseases of the teeth Include erosion (corrosion; may be caused by acidic beverages), abrasion (caused by mechanical wear as with toothbrushing 'with abrasive dentifrice), attrition (due to functional contact with opposing teeth), and abfraction (flexure due to occlusal loading).
Question 16

Calculus is detrimental to the gingival tissues because it is ____.

A
A mechanical irritant
B
Covered with bacterial plaque
C
Composed of calcium and phosphorous
D
Locked into surface irregularities
Question 16 Explanation: 
B. Calculus is calcified dental plaque. It is always covered by a layer of uncalcified plaque, which is detrimental to the gingival tissues.
Question 17
What are the characteristics of the primary (initial) bacterial colonizers of the tooth in dental plaque formation?
A
Gram-negative facultative
B
Gram-positive facultative
C
Gram-negative anaerobic
D
Gram-positive anaerobic
Question 17 Explanation: 
B. Streptococcal and Actinomyces species are ini¬tial colonizers of dental plaque. They are gram- positive, facultative micro-organisms.
Question 18
Occlusal loading resulting in tooth flexure, mechanical microfractures, and loss of tooth substance in the cervical area is ____.
A
Abrasion
B
Attrition
C
Erosion
D
Abfraction
Question 18 Explanation: 
D. Wasting diseases of the teeth Include erosion (corrosion; may be caused by acidic beverages), abrasion (caused by mechanical wear as with toothbrushing 'with abrasive dentifrice), attrition (due to functional contact with opposing teeth), and abfraction (flexure due to occlusal loading).
Question 19

The predominant inflammatory cells in the periodontal pocket are ____.

A
Lymphocytes
B
Plasma cells
C
Neutrophils
D
Macrophages
Question 19 Explanation: 
C. Neutrophils are the predominant inflammatory cells in the periodontal pocket and have mig¬rated across the pocket epithelium from the subgingival vascular plexus.
Question 20
What is the most important procedure to perform during the initial postoperative visits following periodontal surgery?
A
Plaque removal
B
Visual assessment of the soft tissue
C
Periodontal probing
D
Bleeding index
Question 20 Explanation: 
A. Plaque removal during the initial postoperative visits following periodontal surgery is essential to healing of the periodontal tissues.
Question 21

Which of the following are the most important proteinases involved in destruction of the periodontal tissues?

A
Hylauronidase
B
Matrix metalloproteinases
C
Glucuronidase
D
Serine proteinases
Question 21 Explanation: 
B. Matrix metalloproteinases are the most important proteinases Involved in the destruction of periodontal tissues.
Question 22
When performing a laterally repositioned flap, which of the following must be considered relative to the donor site?
A
Presence of bone on the facial
B
Width of attached gingiva
C
Thickness of attached gingiva
D
All of the above
Question 22 Explanation: 
D. Laterally positioned flaps should only be performed when there is adequate bone and ade¬quate width and thickness of attached gingiva on the facial of the donor site.
Question 23

Given the same amount of attachment loss and 22. same pocket depth, a single-rooted tooth and a multirooted tooth have the same prognosis. The closer the base of the pocket is to the apex of the tooth, the worse the prognosis.

A
Both statements are true.
B
Both statements are false.
C
First statement is true. Second statement is false.
D
First statement is false. Second statement is true.
Question 23 Explanation: 
D. Single-rooted teeth have a poorer prognosis than do multirooted teeth with comparable loss of attachment. Loss of attachment that extends to the apex of the root alters the crown-to-root ratio and makes the prognosis worse.
Question 24
The most common clinical sign of occlusal trauma is ____.
A
Tooth migration
B
Tooth abrasion
C
Tooth mobility
D
Tooth attrition
Question 24 Explanation: 
C. Although tooth migration can be a sign of occlusal trauma, tooth mobility is the most com¬mon clinical sign.
Question 25

Which of the following are cells of the innate immune system?

a. Neutrophils and monocytes/macrophages b. T cells and B cells c. Mast cells and dendritic cells d. Plasma cells

A
a and b
B
a and c
C
b and d
D
b and c
Question 25 Explanation: 
B. Cells of the innate immune system include neutrophils, monocytes/macrophages, mast cells, and dendritic cells. Cells of the specific (adap¬tive) immune system include T cells, B cells, and plasma cells.
Once you are finished, click the button below. Any items you have not completed will be marked incorrect. Get Results
There are 25 questions to complete.
List
Return
Shaded items are complete.
12345
678910
1112131415
1617181920
2122232425
End
Return

One thought on “Periodontics, Preparation for NBDE Part II

Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>