★ NEWEST ★
NATIONAL BOARD DENTAL HYGIENE EXAMINATION
NBDHE
Exam Version 2 – Study Guide
Complete Questions & Correct Detailed Answers
✔ Verified Answers | Brand New Version!!
✔ Actual exam questions — 2025/2026 edition
✔ All answers verified with full explanations
✔ Covers ALL high-yield NBDHE exam topics
✔ Microbiology, radiology, perio, materials & ethics
✔ Instant download — study anytime, anywhere
PROFESSIONAL TITLE:
NBDHE National Board Dental Hygiene Examination 2025/2026 | Version 2 Complete Study Guide –
Actual Exam Questions & Verified Correct Answers | Brand New Edition
For educational purposes | Exam Preparation Material | All answers verified
National Board Dental Hygiene Examination (NBDHE) – 2025/2026 Preparation
, NBDHE Exam Version 2 – National Board Dental
Hygiene Exam 2025/2026
PROFESSIONAL TITLE
NBDHE National Board Dental Hygiene Examination 2025/2026 | Version 2 Complete Study Guide – Actual
Exam Questions & Verified Correct Answers | Brand New Edition
DESCRIPTION
Prepare with confidence for the National Board Dental Hygiene Examination (NBDHE) using this
comprehensive, exam-ready study guide. Version 2 contains the complete set of actual exam
questions paired with verified, detailed correct answers — fully updated for the 2025/2026 testing
cycle.
Topics covered include: • Radiology & periodontal ligament pathology interpretation • Fluoride
therapy — water fluoridation, varnish, supplements & toxicology • Periodontal disease staging,
furcation classification & mobility assessment • Dental caries, calculus, stain types & CAMBRA risk
assessment • Infection control — OSHA, CDC, sterilization methods & disinfectants • Dental
instruments — Gracey curets, ultrasonic scalers & implant care • Dental materials — cements,
impression materials, composites & amalgam • Community dental health, epidemiology, indices &
program planning • Microbiology — bacteria, viruses, hepatitis, immunity & hypersensitivity •
Dental ethics, law, informed consent, HIPAA & scope of practice • Oral pathology — leukoplakia,
erythroplakia, oral cancer & lesion identification • Local anesthesia, pharmacology & medical
emergencies
Each question-and-answer pair has been carefully reviewed and verified for accuracy. Whether
you are sitting for the NBDHE for the first time or refreshing your knowledge before recertification,
this guide gives you the targeted, high-yield practice needed to pass with confidence.
✔ Newest 2025/2026 version ✔ Brand new questions ✔ Detailed verified answers ✔ Instant
download
This study guide is intended for exam preparation purposes only.
,1|Page
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
NATIONAL BOARD DENTAL HYGIENE EXAMINATION
NBDHE
Exam Version 2 – Study Guide
Complete Questions & Correct Detailed Answers
✔ Verified Answers | Brand New Version!!
✔ Actual exam questions — 2025/2026 edition
✔ All answers verified with full explanations
✔ Covers ALL high-yield NBDHE exam topics
✔ Microbiology, radiology, perio, materials & ethics
✔ Instant download — study anytime, anywhere
PROFESSIONAL TITLE:
NBDHE National Board Dental Hygiene Examination 2025/2026 | Version 2 Complete Study Guide –
Actual Exam Questions & Verified Correct Answers | Brand New Edition
For educational purposes | Exam Preparation Material | All answers verified
National Board Dental Hygiene Examination (NBDHE) – 2025/2026 Preparation
, NBDHE Exam Version 2 – National Board Dental
Hygiene Exam 2025/2026
PROFESSIONAL TITLE
NBDHE National Board Dental Hygiene Examination 2025/2026 | Version 2 Complete Study Guide – Actual
Exam Questions & Verified Correct Answers | Brand New Edition
DESCRIPTION
Prepare with confidence for the National Board Dental Hygiene Examination (NBDHE) using this
comprehensive, exam-ready study guide. Version 2 contains the complete set of actual exam
questions paired with verified, detailed correct answers — fully updated for the 2025/2026 testing
cycle.
Topics covered include: • Radiology & periodontal ligament pathology interpretation • Fluoride
therapy — water fluoridation, varnish, supplements & toxicology • Periodontal disease staging,
furcation classification & mobility assessment • Dental caries, calculus, stain types & CAMBRA risk
assessment • Infection control — OSHA, CDC, sterilization methods & disinfectants • Dental
instruments — Gracey curets, ultrasonic scalers & implant care • Dental materials — cements,
impression materials, composites & amalgam • Community dental health, epidemiology, indices &
program planning • Microbiology — bacteria, viruses, hepatitis, immunity & hypersensitivity •
Dental ethics, law, informed consent, HIPAA & scope of practice • Oral pathology — leukoplakia,
erythroplakia, oral cancer & lesion identification • Local anesthesia, pharmacology & medical
emergencies
Each question-and-answer pair has been carefully reviewed and verified for accuracy. Whether
you are sitting for the NBDHE for the first time or refreshing your knowledge before recertification,
this guide gives you the targeted, high-yield practice needed to pass with confidence.
✔ Newest 2025/2026 version ✔ Brand new questions ✔ Detailed verified answers ✔ Instant
download
This study guide is intended for exam preparation purposes only.
,1|Page
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
