NBDHE EXAM WITH CASE STUDIES VERSION 1
NBDHE EXAM WITH CASE STUDIES VERSION 1 NEWEST
2025/2026 COMPLETE 500 QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+||BRAND
NEW VERSION!!
A dental hygienist notices a 4mm probing depth changed to 2mm at the 4-week
evaluation after periodontal debridement. The most likely reason for this is:
A. decrease in vasculitis in the connective tissue
B. gain in periodontal attachment to the tooth surface
C. decrease in edema within the tissue
D. formation of long junctional epithelium
E. increase in collagen production - ANSWER-C. decrease in edema within the
tissue
The two earliest signs of gingival inflammation preceding established gingivitis
are:
A. increased collagen fibers and vascularity
B. gnawing discomfort and ulceration of the marginal gingiva
C. presence of calculus and bone loss
D. gingival recession and increased bleeding on probing the sulcus
E. increased gingival fluid and bleeding on probing the sulcus - ANSWER-E.
increased gingival fluid and bleeding on probing the sulcus
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, NBDHE EXAM WITH CASE STUDIES VERSION 1
Fetid breath odor, pseudomembranous ulceration at the marginal gingival and
interdental papillae, gingival bleeding, and the presence of spirochetes and
fusiform bacteria are associated with:
A. nectrotic ulcerative gingivitis (NUG)
B. periapical abscess
C. apthous ulceration
D. pericoronitis
E. herpes simplex I - ANSWER-A. nectrotic ulcerative gingivitis (NUG)
A patient had gingival tissue between teeth #25 and #26 that is erythematous and
bleeds easily on probing. The patient says it has been "very tender" the past
couple of days. Which of the following BEST describes what is happening in this
area?
A. chronic gingivitis
B. acute gingivitis
C. chronic periodontitis
D. acute periodontitis - ANSWER-B. acute gingivitis
Early bacterial biofilm is associated with:
A. vibrios
B. gram-positive cocci and rods
C. gram-negative filamentous forms
D. spirochetes
E. anaerobic microflora - ANSWER-B. gram-positive cocci and rods
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, NBDHE EXAM WITH CASE STUDIES VERSION 1
Lipopolysaccharides or endotoxins associated with gram-negative bacteria are
known to:
A. stimulate corticosteroid formation
B. stimulate osteoclast-mediated bone resorption
C. increase the quantity of albumin in the cementum
D. cause spontaneous bleeding at the marginal gingiva
E. decrease the production of sulcular fluid - ANSWER-B. stimulate osteoclast-
mediated bone resorption
Inflammatory response to bacterial plaque occurs:
A. within 4-6 days
B. 2-4 days
C. within 24 hours
D. 7-14 days - ANSWER-B. 2-4 days
Gram positive cocci enter the bacterial biofilm in how many days?
A. 1-2
B. 10-14
C. 14-21
D. 4-7 - ANSWER-A. 1-2
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, NBDHE EXAM WITH CASE STUDIES VERSION 1
Gingival tissues that are inflamed and bleed upon probing because of certain
changes taking place in the pocket epithelium. Which of the following represents
these changes?
A. hyperplasia
B. keratinization
C. microulceration
D. invasion - ANSWER-C. microulceration
Which of the following make up the periodontal attachment apparatus: 1. gingiva
2. periodontal ligament 3. cementum 4. bone
A. 2,3,4
B. 1,2,3
C. 1,3,4
D. 1,2,4 - ANSWER-A. 2,3,4
Which of the following is NOT a cardinal sign of inflammation?
A. redness
B. pain
C. swelling
D. heat
E. infection - ANSWER-E. infection
Rapid progressive periodontal disease is more likely to occur in all of the following
systemic condiitons EXCEPT:
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NBDHE EXAM WITH CASE STUDIES VERSION 1 NEWEST
2025/2026 COMPLETE 500 QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+||BRAND
NEW VERSION!!
A dental hygienist notices a 4mm probing depth changed to 2mm at the 4-week
evaluation after periodontal debridement. The most likely reason for this is:
A. decrease in vasculitis in the connective tissue
B. gain in periodontal attachment to the tooth surface
C. decrease in edema within the tissue
D. formation of long junctional epithelium
E. increase in collagen production - ANSWER-C. decrease in edema within the
tissue
The two earliest signs of gingival inflammation preceding established gingivitis
are:
A. increased collagen fibers and vascularity
B. gnawing discomfort and ulceration of the marginal gingiva
C. presence of calculus and bone loss
D. gingival recession and increased bleeding on probing the sulcus
E. increased gingival fluid and bleeding on probing the sulcus - ANSWER-E.
increased gingival fluid and bleeding on probing the sulcus
1|Page
, NBDHE EXAM WITH CASE STUDIES VERSION 1
Fetid breath odor, pseudomembranous ulceration at the marginal gingival and
interdental papillae, gingival bleeding, and the presence of spirochetes and
fusiform bacteria are associated with:
A. nectrotic ulcerative gingivitis (NUG)
B. periapical abscess
C. apthous ulceration
D. pericoronitis
E. herpes simplex I - ANSWER-A. nectrotic ulcerative gingivitis (NUG)
A patient had gingival tissue between teeth #25 and #26 that is erythematous and
bleeds easily on probing. The patient says it has been "very tender" the past
couple of days. Which of the following BEST describes what is happening in this
area?
A. chronic gingivitis
B. acute gingivitis
C. chronic periodontitis
D. acute periodontitis - ANSWER-B. acute gingivitis
Early bacterial biofilm is associated with:
A. vibrios
B. gram-positive cocci and rods
C. gram-negative filamentous forms
D. spirochetes
E. anaerobic microflora - ANSWER-B. gram-positive cocci and rods
2|Page
, NBDHE EXAM WITH CASE STUDIES VERSION 1
Lipopolysaccharides or endotoxins associated with gram-negative bacteria are
known to:
A. stimulate corticosteroid formation
B. stimulate osteoclast-mediated bone resorption
C. increase the quantity of albumin in the cementum
D. cause spontaneous bleeding at the marginal gingiva
E. decrease the production of sulcular fluid - ANSWER-B. stimulate osteoclast-
mediated bone resorption
Inflammatory response to bacterial plaque occurs:
A. within 4-6 days
B. 2-4 days
C. within 24 hours
D. 7-14 days - ANSWER-B. 2-4 days
Gram positive cocci enter the bacterial biofilm in how many days?
A. 1-2
B. 10-14
C. 14-21
D. 4-7 - ANSWER-A. 1-2
3|Page
, NBDHE EXAM WITH CASE STUDIES VERSION 1
Gingival tissues that are inflamed and bleed upon probing because of certain
changes taking place in the pocket epithelium. Which of the following represents
these changes?
A. hyperplasia
B. keratinization
C. microulceration
D. invasion - ANSWER-C. microulceration
Which of the following make up the periodontal attachment apparatus: 1. gingiva
2. periodontal ligament 3. cementum 4. bone
A. 2,3,4
B. 1,2,3
C. 1,3,4
D. 1,2,4 - ANSWER-A. 2,3,4
Which of the following is NOT a cardinal sign of inflammation?
A. redness
B. pain
C. swelling
D. heat
E. infection - ANSWER-E. infection
Rapid progressive periodontal disease is more likely to occur in all of the following
systemic condiitons EXCEPT:
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