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NBDHE EXAM VERSION 2 NATIONAL BOARD
DENTAL HYGIENE EXAMINATION NEWEST
2026 2027 COMPLETE QUESTIONS AND
CORRECT DETAILED FULLY VERIFIED
ANSWERS BRAND NEW VERSION HIGH YIELD
STUDY GUIDE ACTUAL UPDATED PRACTICE
QUESTIONS BOARD EXAM PREPARATION
GRADED A+ SUCCESS REVIEW
A radiograph shows widened periodontal ligament space and tooth
mobility. Which condition is most likely?
A. Pulp necrosis
B. Periodontal abscess
C. Trauma from occlusion
D. Periapical cyst
CORRECT ANSWER: C
Which fluoride compound is most commonly used in community water
fluoridation?
A. Sodium fluoride
B. Sodium silicofluoride
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C. Stannous fluoride
D. Hydrofluorosilicic acid
CORRECT ANSWER: D
Which type of bacteria initiates dental caries?
A. Streptococcus mutans
B. Lactobacillus acidophilus
C. Actinomyces israelii
D. Porphyromonas gingivalis
CORRECT ANSWER: A
Which stage of periodontal disease is characterized by apical migration
of the junctional epithelium?
A. Gingivitis
B. Initial lesion
C. Established lesion
D. Periodontitis
CORRECT ANSWER: D
Which drug is most likely to cause gingival hyperplasia?
A. Nifedipine
B. Metformin
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C. Hydrochlorothiazide
D. Atenolol
CORRECT ANSWER: A
Which instrument is best suited for scaling lingual anterior teeth?
A. Gracey 1/2
B. Gracey 11/12
C. Gracey 13/14
D. Universal 4R/4L
CORRECT ANSWER: A
The recommended brushing method for children under 6 years is:
A. Bass
B. Charter’s
C. Fones
D. Modified Stillman
CORRECT ANSWER: C
Which condition is most strongly associated with Epstein–Barr virus?
A. Oral candidiasis
B. Hairy leukoplakia
C. Kaposi’s sarcoma
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D. Pemphigus vulgaris
CORRECT ANSWER: B
Which radiographic error results in teeth appearing foreshortened?
A. Too little vertical angulation
B. Too much vertical angulation
C. Film bending
D. Patient movement
CORRECT ANSWER: B
Which caries risk factor is most significant?
A. Frequency of sugar intake
B. Toothbrushing frequency
C. Saliva flow rate
D. Type of toothbrush used
CORRECT ANSWER: A
Which of the following indices is used to measure fluorosis?
A. DMFT
B. Dean’s index
NBDHE EXAM VERSION 2 NATIONAL BOARD
DENTAL HYGIENE EXAMINATION NEWEST
2026 2027 COMPLETE QUESTIONS AND
CORRECT DETAILED FULLY VERIFIED
ANSWERS BRAND NEW VERSION HIGH YIELD
STUDY GUIDE ACTUAL UPDATED PRACTICE
QUESTIONS BOARD EXAM PREPARATION
GRADED A+ SUCCESS REVIEW
A radiograph shows widened periodontal ligament space and tooth
mobility. Which condition is most likely?
A. Pulp necrosis
B. Periodontal abscess
C. Trauma from occlusion
D. Periapical cyst
CORRECT ANSWER: C
Which fluoride compound is most commonly used in community water
fluoridation?
A. Sodium fluoride
B. Sodium silicofluoride
,2 | Page
C. Stannous fluoride
D. Hydrofluorosilicic acid
CORRECT ANSWER: D
Which type of bacteria initiates dental caries?
A. Streptococcus mutans
B. Lactobacillus acidophilus
C. Actinomyces israelii
D. Porphyromonas gingivalis
CORRECT ANSWER: A
Which stage of periodontal disease is characterized by apical migration
of the junctional epithelium?
A. Gingivitis
B. Initial lesion
C. Established lesion
D. Periodontitis
CORRECT ANSWER: D
Which drug is most likely to cause gingival hyperplasia?
A. Nifedipine
B. Metformin
,3 | Page
C. Hydrochlorothiazide
D. Atenolol
CORRECT ANSWER: A
Which instrument is best suited for scaling lingual anterior teeth?
A. Gracey 1/2
B. Gracey 11/12
C. Gracey 13/14
D. Universal 4R/4L
CORRECT ANSWER: A
The recommended brushing method for children under 6 years is:
A. Bass
B. Charter’s
C. Fones
D. Modified Stillman
CORRECT ANSWER: C
Which condition is most strongly associated with Epstein–Barr virus?
A. Oral candidiasis
B. Hairy leukoplakia
C. Kaposi’s sarcoma
, 4 | Page
D. Pemphigus vulgaris
CORRECT ANSWER: B
Which radiographic error results in teeth appearing foreshortened?
A. Too little vertical angulation
B. Too much vertical angulation
C. Film bending
D. Patient movement
CORRECT ANSWER: B
Which caries risk factor is most significant?
A. Frequency of sugar intake
B. Toothbrushing frequency
C. Saliva flow rate
D. Type of toothbrush used
CORRECT ANSWER: A
Which of the following indices is used to measure fluorosis?
A. DMFT
B. Dean’s index
