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NBDHE Exam Version 2 / National Board Dental
Hygiene Examination Newest 2025/2026 Complete
Questions And Correct Detailed Answers (Verified
Answers) |Brand New Version!!
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
Answer: C
Which fluoride compound is most commonly used in community water
fluoridation?
A. Sodium fluoride
B. Sodium silicofluoride
C. Stannous fluoride
D. Hydrofluorosilicic acid
Answer: D
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Which type of bacteria initiates dental caries?
A. Streptococcus mutans
B. Lactobacillus acidophilus
C. Actinomyces israelii
D. Porphyromonas gingivalis
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
Answer: D
Which drug is most likely to cause gingival hyperplasia?
A. Nifedipine
B. Metformin
C. Hydrochlorothiazide
D. Atenolol
Answer: A
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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
Answer: A
The recommended brushing method for children under 6 years is:
A. Bass
B. Charter’s
C. Fones
D. Modified Stillman
Answer: C
Which condition is most strongly associated with Epstein–Barr virus?
A. Oral candidiasis
B. Hairy leukoplakia
C. Kaposi’s sarcoma
D. Pemphigus vulgaris
Answer: B
Which radiographic error results in teeth appearing foreshortened?
A. Too little vertical angulation
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B. Too much vertical angulation
C. Film bending
D. Patient movement
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
Answer: A
Which of the following indices is used to measure fluorosis?
A. DMFT
B. Dean’s index
C. Plaque index
D. Gingival index
Answer: B
The first permanent tooth to erupt is usually:
A. Mandibular first molar
B. Maxillary first molar
NBDHE Exam Version 2 / National Board Dental
Hygiene Examination Newest 2025/2026 Complete
Questions And Correct Detailed Answers (Verified
Answers) |Brand New Version!!
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
Answer: C
Which fluoride compound is most commonly used in community water
fluoridation?
A. Sodium fluoride
B. Sodium silicofluoride
C. Stannous fluoride
D. Hydrofluorosilicic acid
Answer: D
,2|Page
Which type of bacteria initiates dental caries?
A. Streptococcus mutans
B. Lactobacillus acidophilus
C. Actinomyces israelii
D. Porphyromonas gingivalis
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
Answer: D
Which drug is most likely to cause gingival hyperplasia?
A. Nifedipine
B. Metformin
C. Hydrochlorothiazide
D. Atenolol
Answer: A
,3|Page
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
Answer: A
The recommended brushing method for children under 6 years is:
A. Bass
B. Charter’s
C. Fones
D. Modified Stillman
Answer: C
Which condition is most strongly associated with Epstein–Barr virus?
A. Oral candidiasis
B. Hairy leukoplakia
C. Kaposi’s sarcoma
D. Pemphigus vulgaris
Answer: B
Which radiographic error results in teeth appearing foreshortened?
A. Too little vertical angulation
, 4|Page
B. Too much vertical angulation
C. Film bending
D. Patient movement
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
Answer: A
Which of the following indices is used to measure fluorosis?
A. DMFT
B. Dean’s index
C. Plaque index
D. Gingival index
Answer: B
The first permanent tooth to erupt is usually:
A. Mandibular first molar
B. Maxillary first molar
