DENTAL HYGIENE NATIONAL BOARD EXAM
SCRIPT 2026 QUESTIONS WITH SOLUTIONS
GRADED A+
◉ What fibers of the PDL are the most prominent. Answer: Oblique
fibers
◉ Stillman's cleft. Answer: v shaped loss of gingiva. Due to bad
flossing habits
◉ McCall's festoon. Answer: innertube shaped swelling at the
marginal gingiva
◉ Drug induced gingival hyperplasia. Answer: Dilantin (Phenytoin)
Procardia (Nifedipine)
Cyclosporin (immunosuppressant)
◉ dihiscence. Answer: loss of alveolar bone
oval shaped root exposure apical to CEJ
,◉ Fenestration. Answer: a window-like opening in the bone covering
the root of a tooth bordered by alveolar bone on the coronal aspect
of the tooth.
◉ Bacteria shape present in early plaque formation. Answer: cocci
shaped, aerobic
◉ Bacteria shape in periodontal disease. Answer: baccilli, anaerobic
◉ Bacteria shape present in NUG/NUP. Answer: spirochetes
◉ periodontal bacteria in health. Answer: aerobic, cocci, gram +
◉ Periodontal bacteria in diease. Answer: anaerobic, baccilli, gram -
◉ Names of the bacteria that cause periodontal disease. Answer: P.
Gingivalis
F. Nucletum
T. Forsythia
A. Actinomycetescomatins
◉ Bacteria responsible for NUG. Answer: P. Gingivalis
T. Dentacolo
,P. Intermedian
Fusobactrium
◉ Bacteria responsible for caries. Answer: S. Mutans
Lactobacillus
S. Sobrinus
◉ What bacteria is most commonly associated with aggressive
periodontitis. Answer: A. Actinomycetescomatins
◉ Is plankton plaque adherent or non adherent?. Answer: non
adherent
◉ how do endotoxins contribute to tissue destruction?. Answer:
Stimulate osteoclast
◉ periodontal disease. Answer: apical migration of the junctional
epithelium
◉ CAL. Answer: measures attachment loss
CEJ to base of pocket
, ◉ What instrument is best to detect a furcation. Answer: Nabers
Probe
◉ Suprabony pocket. Answer: The pocket is located above the level
of the bone, NOT visible on a radiograph.
◉ Infrabony pocket. Answer: base of pocket is apical to crest of
alveolar bone
◉ Does occlusal trauma cause periodontal disease. Answer: No
◉ Primary Herpetic Gingivostomatitis. Answer: HSV type 1
usually affects children younger than 6
Inflamed, enlarged marginal gingiva; gingival bleeding
pin point vesicles -> ulcers throughout the mouth and lips w/ sig
pain
Malise
low grade fever
sore throat, lymphadenopathy
doesnt want to drink water
◉ Is a patient with down syndrome at a greater risk for caries.
Answer: No, but they are at an increased risk for perio
SCRIPT 2026 QUESTIONS WITH SOLUTIONS
GRADED A+
◉ What fibers of the PDL are the most prominent. Answer: Oblique
fibers
◉ Stillman's cleft. Answer: v shaped loss of gingiva. Due to bad
flossing habits
◉ McCall's festoon. Answer: innertube shaped swelling at the
marginal gingiva
◉ Drug induced gingival hyperplasia. Answer: Dilantin (Phenytoin)
Procardia (Nifedipine)
Cyclosporin (immunosuppressant)
◉ dihiscence. Answer: loss of alveolar bone
oval shaped root exposure apical to CEJ
,◉ Fenestration. Answer: a window-like opening in the bone covering
the root of a tooth bordered by alveolar bone on the coronal aspect
of the tooth.
◉ Bacteria shape present in early plaque formation. Answer: cocci
shaped, aerobic
◉ Bacteria shape in periodontal disease. Answer: baccilli, anaerobic
◉ Bacteria shape present in NUG/NUP. Answer: spirochetes
◉ periodontal bacteria in health. Answer: aerobic, cocci, gram +
◉ Periodontal bacteria in diease. Answer: anaerobic, baccilli, gram -
◉ Names of the bacteria that cause periodontal disease. Answer: P.
Gingivalis
F. Nucletum
T. Forsythia
A. Actinomycetescomatins
◉ Bacteria responsible for NUG. Answer: P. Gingivalis
T. Dentacolo
,P. Intermedian
Fusobactrium
◉ Bacteria responsible for caries. Answer: S. Mutans
Lactobacillus
S. Sobrinus
◉ What bacteria is most commonly associated with aggressive
periodontitis. Answer: A. Actinomycetescomatins
◉ Is plankton plaque adherent or non adherent?. Answer: non
adherent
◉ how do endotoxins contribute to tissue destruction?. Answer:
Stimulate osteoclast
◉ periodontal disease. Answer: apical migration of the junctional
epithelium
◉ CAL. Answer: measures attachment loss
CEJ to base of pocket
, ◉ What instrument is best to detect a furcation. Answer: Nabers
Probe
◉ Suprabony pocket. Answer: The pocket is located above the level
of the bone, NOT visible on a radiograph.
◉ Infrabony pocket. Answer: base of pocket is apical to crest of
alveolar bone
◉ Does occlusal trauma cause periodontal disease. Answer: No
◉ Primary Herpetic Gingivostomatitis. Answer: HSV type 1
usually affects children younger than 6
Inflamed, enlarged marginal gingiva; gingival bleeding
pin point vesicles -> ulcers throughout the mouth and lips w/ sig
pain
Malise
low grade fever
sore throat, lymphadenopathy
doesnt want to drink water
◉ Is a patient with down syndrome at a greater risk for caries.
Answer: No, but they are at an increased risk for perio
