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NBDHE Most Common Questions | Complete Study Guide, Practice Questions & Dental Hygiene Board Exam Prep

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Prepare for the **NBDHE with this comprehensive study resource featuring commonly tested dental hygiene concepts and exam-focused practice questions. This guide covers essential topics including patient assessment, oral health care, preventive dentistry, clinical procedures, radiography, pharmacology, infection control, and professional dental hygiene principles. Designed to support dental hygiene students preparing for the National Board Dental Hygiene Examination, this resource helps reinforce key knowledge, improve retention, and build confidence for board exam preparation.

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NBDHE MOST
COMMON
QUESTIONS

(2025-2026)
(Final Exam Questions With 100% Correct
Answers | Verified Answer Guaranteed
Pass | Latest Update (2026-2027) | Already
Graded A+)FIBA Agent Test

,cholinergic drugs agents that stimulate the parasympathetic nervous system in the same manner as
acetylcholine



adverse reaction to cholinergic drugs SLUD:

Salvation
Lacrimation
Urination
Defecation


Cholinergic Agonist that treats xerostomia Pilocarpine (Salagen)




Anticholinergic drugs Drugs that acts opposite PANS, mydriasis, reduce secretions




Anticholinergic drug used pre-op to decrease salivary flow Atropine
for dental procedures



Anticholinergic drug that treats COPD Ipratropium




An cholinergic antagonist used to treat motion sickness Scoplamine
and decrease salivary flow



What vitamin B is found in milk? Riboflavin (Vitamin B2)




What are the advantages of photopolymerized sealants? -No mixing is required

-Working time is increased
(added color - pink or green, turns tooth color/opaque when light cured)


supine hypotensive syndrome Low blood pressure resulting from compression of the inferior vena cava by the
weight of the pregnant uterus when the mother is supine.



Which premolars have 2 roots? Maxillary first premolars




Two teeth developed from single root/tooth bud? Germination
(two teeth one root)



Two teeth fused together, two roots Fusion




Most congenitally missing tooth in the mouth? Maxillary lateral incisors

,Longest tooth in the dentition Maxillary canines




Tooth with distinct MESIAL root concavity/depression? Maxillary first premolars




Maxillary second premolars have? 1 root
2 cusps



Tooth with nonfunctioning cusps? Mandibular first premolar




Cusp of carabelli? Maxillary first molar (additional 5th cusp)




Only premolar with 3 cusps? Mandibular second premolar (can have 2 or 3)
3 cusp type= 1 buccal and 2 lingual cusps



Maxillary molars have ? roots Max= 3
Mandibular molars have ? roots Mand= 2
(except for thirds)


Largest tooth in the mouth with 5 cusps? MANDIBULAR FIRST MOLAR




The state of teeth joined together ONLY by cementum is? concrescence
(cementum/concre)



An x-ray shows that the roots of a lower molar are severely Dilaceration
curved to almost 90degrees. This is called?



What is the most common site for supernumerary teeth? Btw maxillary central incisors




Recurrent aphthous ulcers appear to be associated with ? stress




Clinically and microscopically, an epulis fissuratum is most irritation fibroma
similar to what lesion?



3 conditions in which the papilloma virus (HPV) has been 1. Oral papilloma
found? 2. Condyloma acuminatom (spelling?)
3. squamous cell carcinoma


Epstein Barr Virus -----> E.B.V= Burkitts lymphoma
Varicella Zoster Virus -----> V.Z.V= Shingles (chickenpox)
Human Herpes Virus-8 -------> HHV-8= Karposi sarcoma
Herpes Simplex 1 Virus -------> HSV1= herpes labialis

, Carcinoma that does not invade the connective tissue is carcimona in situ
referred to as?



Which vesiculobullous disorder features an auto anti-body Pemphigus vulgaris
that localizes in the intracellular cementing substance of (nikosky)
stratified squamous epithelium?


MOST common type of skin cancer that does NOT occur Basal cell carcinoma
in the mouth- related to the sun?



The most common malignancy in the oral cavity? squamous cell carcinoma
also known as "epidermoid carcinoma"



Pyogenic granuloma "pregnancy tumor"




aphthous ulcer




Aspirin burn




An oval radiolucent area is discovered on x-rays above Nasopalatine duct (canal) cyst
maxillary central incisors. Teeth are vital, roots not
absorbed. Pt has?


x-ray shown of unerupted mandibular 3rd molar with a 3cm dentigerous cyst
PERICORONAL radiolucency. DX? Pericoronal= around the crown of tooth



4 conditions that appear white? leukoplakia
leukoedema
linea alba
pseudomembranous candidiasis

(Mucocele would not) ^Image**


Most common location for AIDS related hairy leukoplakia? lateral borders of the tongue




Loss of what papilla occurs with benign migratory filiform
glossitis?



The first clinically observable reaction to radiation erythema of the skin
overexposure is?



A specific presentation of oral candidiasis, sometimes seen median rhomboid glossitis
in otherwise healthy patients is?

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