NBDHE Exam / National Board Dental
Hygiene Examination Newest 2025/2026 Complete
Questions And 100% Correct Answers With
Rationales(Verified
Answers A+) |Latest update!!!
Mottled enamel results from vigorous toothbrushing with
dentifrice products with significant abrasive levels. Mottled
enamel is a chronic endemic form of hypoplasia of dental
enamel caused by ingestion of excessive amounts of
fluoride. - ANSWER-The first statement is false, the
second is true. I think i misread this one.
Which of the following chemical agents is not a liquid
sterilant: Gluteraldehyde, Hydrogen peroxide, Sodium
hypochlorite, paracetic acid. - ANSWER-Sodium
,hypochlorite aka bleach, is an intermediate level
disinfectant and can't kill spores, thus is not a sterilant.
Which of the following produces the shiny surface on a dry
polished dental amalgam: fine cutting of the surface,
smear layer of amalgam debris, mercury releasing by
melting the matrix phase, heat hardening the surface
phases. - ANSWER-Mercury released by melting the
matrix phase. During dry polishing it is difficult to prevent
increasing the surface temperature since there is no water
to cool it down.
What is the primary purpose of periodontal debridement?
Removal of all clinically detectable calculus, removal of all
plaque retentive factors, removal of diseased cementum
,and calculus, establishment of a smooth root surface,
restoration of gingival health. - ANSWER-Restoration of
gingival health.
Stomatococcus mucilaginosus is part of the normal flora of
which of the following? Lip, palate, cheek, tongue, or pits
and fissures. - ANSWER-Tongue.
Slightly excessive occlusal pressure on the periodontal
ligament results in which of the following changes to the
tissues of the periodontium? Resorption of alveolar bone,
resorption of tooth surfaces, resorption of bone and tooth
surfaces, apposition of the alveolar bone, necrosis of the
PDL. - ANSWER-Resorption of alveolar bone.
, True or False: Use of a vasoconstrictor is advisable if the
concentration is no greater than 1:100,000 epinephrine
and the total dose is no greater than 0.04mg in a patient
who has a history of previous coronary artery disease. -
ANSWER-True.
Which of the following form of streptococci is NOT
common flora of the oral soft tissues: S. oralis, S. mitis, S.
mutans, S. salivarius, S. vestibularis. - ANSWER-S.
mutans - it is predominantly found on hard tissues or
teeth. S. oralis and mitis are cheek/tongue, salivarius on
tongue, vestibularis in the lip vestibule.
Which of the following describe a dental implant that is
placed on the surface of the bone beneath the periosteum:
Periosseous, Endosseous, Transosteal, Subperiosteal. -
Hygiene Examination Newest 2025/2026 Complete
Questions And 100% Correct Answers With
Rationales(Verified
Answers A+) |Latest update!!!
Mottled enamel results from vigorous toothbrushing with
dentifrice products with significant abrasive levels. Mottled
enamel is a chronic endemic form of hypoplasia of dental
enamel caused by ingestion of excessive amounts of
fluoride. - ANSWER-The first statement is false, the
second is true. I think i misread this one.
Which of the following chemical agents is not a liquid
sterilant: Gluteraldehyde, Hydrogen peroxide, Sodium
hypochlorite, paracetic acid. - ANSWER-Sodium
,hypochlorite aka bleach, is an intermediate level
disinfectant and can't kill spores, thus is not a sterilant.
Which of the following produces the shiny surface on a dry
polished dental amalgam: fine cutting of the surface,
smear layer of amalgam debris, mercury releasing by
melting the matrix phase, heat hardening the surface
phases. - ANSWER-Mercury released by melting the
matrix phase. During dry polishing it is difficult to prevent
increasing the surface temperature since there is no water
to cool it down.
What is the primary purpose of periodontal debridement?
Removal of all clinically detectable calculus, removal of all
plaque retentive factors, removal of diseased cementum
,and calculus, establishment of a smooth root surface,
restoration of gingival health. - ANSWER-Restoration of
gingival health.
Stomatococcus mucilaginosus is part of the normal flora of
which of the following? Lip, palate, cheek, tongue, or pits
and fissures. - ANSWER-Tongue.
Slightly excessive occlusal pressure on the periodontal
ligament results in which of the following changes to the
tissues of the periodontium? Resorption of alveolar bone,
resorption of tooth surfaces, resorption of bone and tooth
surfaces, apposition of the alveolar bone, necrosis of the
PDL. - ANSWER-Resorption of alveolar bone.
, True or False: Use of a vasoconstrictor is advisable if the
concentration is no greater than 1:100,000 epinephrine
and the total dose is no greater than 0.04mg in a patient
who has a history of previous coronary artery disease. -
ANSWER-True.
Which of the following form of streptococci is NOT
common flora of the oral soft tissues: S. oralis, S. mitis, S.
mutans, S. salivarius, S. vestibularis. - ANSWER-S.
mutans - it is predominantly found on hard tissues or
teeth. S. oralis and mitis are cheek/tongue, salivarius on
tongue, vestibularis in the lip vestibule.
Which of the following describe a dental implant that is
placed on the surface of the bone beneath the periosteum:
Periosseous, Endosseous, Transosteal, Subperiosteal. -
