NDHCB EXAM PRACTICE TESTS QUESTIONS AND
ANSWERS
Reports of randomized controlled trials - CORRECT ANSWER✅✅✅A dental hygienist has been asked
to provide information to clients about a new tooth whitening procedure. The dental hygienist did not
study this procedure at school. Which of the following sources of information should the dental
hygienist consult before providing information to clients about this procedure?
A. The employer regarding the new technique
B. Reports of randomized controlled trials
C. Colleagues regarding technique and efficacy
D. Dental supply companies regarding product available
Have the interpreter explain the procedure by telephone - CORRECT ANSWER✅✅✅Mrs. Sandhu, 58
years old, is a recent immigrant. She does not speak english or french; however, she is accompanied by
an interpreter for assessment and treatment planning. At the follow-up appointment, Mrs. Sandhu
arrives alone. During periodontal debridement, the dental hygienist determines that Mrs. Sandhu needs
local anesthetic. What should the dental hygienist do next?
A. Explain the action of local anesthetic using gestures
B. Have the interpreter explain the procedure by telephone
C. Use pictures to explain the need for this procedure
D. Proceed with the treatment without the local anesthetic
20 seconds - CORRECT ANSWER✅✅✅Following a client's appointment, the dental hygienist is
preparing the operatory for the next client. What is the recommended minimum time that water should
be run through the water lines before the next appointment?
A. 20 seconds
B. 60 seconds
C. 90 seconds
D. 120 seconds
Encourage him to express his concerns regarding today's appt - CORRECT ANSWER✅✅✅Mr. Kehoe,
a 24 year old informs the dental hygienist that the reason he missed his previous periodontal
debridement appointment was due to a fear of being hurt. Today, he appears anxious. Clinical findings
,who dental biofilm- induced gingivitis localized to the papillae with light interproximal calculus. What is
the best action for the dental hygienist to take next?
A. Encourage him to express his concerns regarding today's appt.
B. Complete his periodontal debridement during one session
C. Suggest that he consider using an anti-anxiety medication
D. Advise that some discomfort is possible and topical anesthetic can be used if necessary
4 vertical bitewings - CORRECT ANSWER✅✅✅Mr. Ungle, 35 years old, presents for his continuing
care appointment. The dental hygienist records generalized posterior periodontal probing depths of 5-
6mm. He reports some sensitivity on the max left quad. What radiographic views would be most
appropriate to take to assess this area?
A. 4 vertical bitewings
B. 4 horizontal bitewings
C. 2 vertical bitewings
D. 2 horizontal bitewings
No signs of gingival infammation - CORRECT ANSWER✅✅✅Which one of the following factors is
most reliable indicator that oral self-care procedures are effective?
A. Reduction of dental biofilm
B. Change in tissue color
C. No signs of gingival inflammation
D. Absence of calculus
A client with recently diagnosed type 2 diabetes - CORRECT ANSWER✅✅✅Who would benefit more
from shorter continuing care appointments?
A. A client who just completed tobacco use cessation program
B. A client who is starting an at-home whitening program
C. A client with recently diagnosed type 2 diabetes
D. A client with a diagnosis of hyperthyroidism
,Mepivicaine (Carbocaine, Polocaine) 3% and the inferior alveolar nerve block, the lingual and long buccal
nerve injections - CORRECT ANSWER✅✅✅Joey, 11 years old, needs LA for periodontal debridement
in Q3. The procedures will take approximately 30 minutes to complete once anesthetized. What
anesthetic agent and injection(s) would be ideal for this situation?
A. Mepivicaine 3% and the inferior alveolar nerve block, the lingual and long buccal nerve injections
B. Lidocaine 2% and buccal infiltration(s)
C. Articaine 4% with epinephrine 1:200,000 and the inferior alveolar nerve block and long buccal nerve
injections
D. Prilocaine 4% with epinephrine 1:200,000 and the inferior alveolar nerve block and long buccal nerve
injections
Pseudomembranous Candidiasis - CORRECT ANSWER✅✅✅Don, an 18-year-old athlete, has been
taking penicillin for pericoronitis of tooth 38. He presents for repair of a clasp on an ill-fitting maxillary
partial denture. Don reports a metallic taste and a burning sensation in the palatal area. The clinical
assessment reveals a lesion under the partial denture. There is a white, curd-like material with
underlying erythematous mucosa. What condition should the dental hygienist suspect?
A. Denture stomatitis
B. Erosive lichen planus
C. Necrotizing periodontitis
D. Pseudomembranous candidiasis
Heat therapy, warm saline mouth rinses and analgesics - CORRECT ANSWER✅✅✅Ms. Katerinova, 32
years old, has recently received local anesthetic for periodontal debridement by the dental hygienist.
She reports pain and some difficulty opening her mouth the day after treatment. What post care
recommendations should the dental hygienist consider?
A. Heat therapy, warm saline mouth rinse and analgesics
B. Cold therapy, antimicrobial mouth rinse and analgesics
C. Antibiotic therapy and warm saline rinses
D. Analgesics and referral for physiotherapy
Candida albicans. - CORRECT ANSWER✅✅✅Which one of the following oral microorganisms may
overgrow with the use of broad-spectrum antibiotics?
A. Porphyromonas gingivalis.
, B. Streptoccocus mutans.
C. Actinomyces viscosus.
D. Candida albicans.
Generalized periodontitis stage II, grade A - CORRECT ANSWER✅✅✅The periodontal assessment of
Mr. Stevens, 30 years, includes a dental biofilm score of 60%, a BOP score of 30% and generalized
clinical attachment loss of 3 mm with no gingival recession. The radiographs indicate generalized
horizontal bone that account for a % of bone loss/age of 0.20. What is Mr. Stevens's periodontal
classification?
A. Generalized periodontitis stage I, grade B
B. Generalized periodontitis stage III, grade B
C. Generalized dental biofilm-induced gingivitis on an intact periodontium
D. Generalized periodontitis stage II, grade A
Elder abuse - CORRECT ANSWER✅✅✅Mrs. Ridley, 81 years old, is now living with her daughter's
family. When she presents for her 9-month continuing care appointment, she appears withdrawn and
anxious even though she has been a longstanding client in the practice. During the intraoral assessment,
the dental hygienist notes poor oral hygiene, a fractured upper denture, and bruising of the edentulous
ridge. What should the dental hygienist suspect?
A. Iron deficiency
B. Dementia
C. Self-neglect
D. Elder abuse
Fluoride varnish - CORRECT ANSWER✅✅✅Mr. Applebaum, 29 years old, presents for his annual
continuing care appointment. He reports extreme sensitivity to cold in the mandibular right quadrant.
Intraoral findings reveal localized gingival recession of 4 mm on teeth 43 and 44. What should the dental
hygienist recommend for Mr. Applebaum?
A. Acidulated phosphate fluoride
B. Fluoride varnish
C. Composite restorations
D. Gingival graft
ANSWERS
Reports of randomized controlled trials - CORRECT ANSWER✅✅✅A dental hygienist has been asked
to provide information to clients about a new tooth whitening procedure. The dental hygienist did not
study this procedure at school. Which of the following sources of information should the dental
hygienist consult before providing information to clients about this procedure?
A. The employer regarding the new technique
B. Reports of randomized controlled trials
C. Colleagues regarding technique and efficacy
D. Dental supply companies regarding product available
Have the interpreter explain the procedure by telephone - CORRECT ANSWER✅✅✅Mrs. Sandhu, 58
years old, is a recent immigrant. She does not speak english or french; however, she is accompanied by
an interpreter for assessment and treatment planning. At the follow-up appointment, Mrs. Sandhu
arrives alone. During periodontal debridement, the dental hygienist determines that Mrs. Sandhu needs
local anesthetic. What should the dental hygienist do next?
A. Explain the action of local anesthetic using gestures
B. Have the interpreter explain the procedure by telephone
C. Use pictures to explain the need for this procedure
D. Proceed with the treatment without the local anesthetic
20 seconds - CORRECT ANSWER✅✅✅Following a client's appointment, the dental hygienist is
preparing the operatory for the next client. What is the recommended minimum time that water should
be run through the water lines before the next appointment?
A. 20 seconds
B. 60 seconds
C. 90 seconds
D. 120 seconds
Encourage him to express his concerns regarding today's appt - CORRECT ANSWER✅✅✅Mr. Kehoe,
a 24 year old informs the dental hygienist that the reason he missed his previous periodontal
debridement appointment was due to a fear of being hurt. Today, he appears anxious. Clinical findings
,who dental biofilm- induced gingivitis localized to the papillae with light interproximal calculus. What is
the best action for the dental hygienist to take next?
A. Encourage him to express his concerns regarding today's appt.
B. Complete his periodontal debridement during one session
C. Suggest that he consider using an anti-anxiety medication
D. Advise that some discomfort is possible and topical anesthetic can be used if necessary
4 vertical bitewings - CORRECT ANSWER✅✅✅Mr. Ungle, 35 years old, presents for his continuing
care appointment. The dental hygienist records generalized posterior periodontal probing depths of 5-
6mm. He reports some sensitivity on the max left quad. What radiographic views would be most
appropriate to take to assess this area?
A. 4 vertical bitewings
B. 4 horizontal bitewings
C. 2 vertical bitewings
D. 2 horizontal bitewings
No signs of gingival infammation - CORRECT ANSWER✅✅✅Which one of the following factors is
most reliable indicator that oral self-care procedures are effective?
A. Reduction of dental biofilm
B. Change in tissue color
C. No signs of gingival inflammation
D. Absence of calculus
A client with recently diagnosed type 2 diabetes - CORRECT ANSWER✅✅✅Who would benefit more
from shorter continuing care appointments?
A. A client who just completed tobacco use cessation program
B. A client who is starting an at-home whitening program
C. A client with recently diagnosed type 2 diabetes
D. A client with a diagnosis of hyperthyroidism
,Mepivicaine (Carbocaine, Polocaine) 3% and the inferior alveolar nerve block, the lingual and long buccal
nerve injections - CORRECT ANSWER✅✅✅Joey, 11 years old, needs LA for periodontal debridement
in Q3. The procedures will take approximately 30 minutes to complete once anesthetized. What
anesthetic agent and injection(s) would be ideal for this situation?
A. Mepivicaine 3% and the inferior alveolar nerve block, the lingual and long buccal nerve injections
B. Lidocaine 2% and buccal infiltration(s)
C. Articaine 4% with epinephrine 1:200,000 and the inferior alveolar nerve block and long buccal nerve
injections
D. Prilocaine 4% with epinephrine 1:200,000 and the inferior alveolar nerve block and long buccal nerve
injections
Pseudomembranous Candidiasis - CORRECT ANSWER✅✅✅Don, an 18-year-old athlete, has been
taking penicillin for pericoronitis of tooth 38. He presents for repair of a clasp on an ill-fitting maxillary
partial denture. Don reports a metallic taste and a burning sensation in the palatal area. The clinical
assessment reveals a lesion under the partial denture. There is a white, curd-like material with
underlying erythematous mucosa. What condition should the dental hygienist suspect?
A. Denture stomatitis
B. Erosive lichen planus
C. Necrotizing periodontitis
D. Pseudomembranous candidiasis
Heat therapy, warm saline mouth rinses and analgesics - CORRECT ANSWER✅✅✅Ms. Katerinova, 32
years old, has recently received local anesthetic for periodontal debridement by the dental hygienist.
She reports pain and some difficulty opening her mouth the day after treatment. What post care
recommendations should the dental hygienist consider?
A. Heat therapy, warm saline mouth rinse and analgesics
B. Cold therapy, antimicrobial mouth rinse and analgesics
C. Antibiotic therapy and warm saline rinses
D. Analgesics and referral for physiotherapy
Candida albicans. - CORRECT ANSWER✅✅✅Which one of the following oral microorganisms may
overgrow with the use of broad-spectrum antibiotics?
A. Porphyromonas gingivalis.
, B. Streptoccocus mutans.
C. Actinomyces viscosus.
D. Candida albicans.
Generalized periodontitis stage II, grade A - CORRECT ANSWER✅✅✅The periodontal assessment of
Mr. Stevens, 30 years, includes a dental biofilm score of 60%, a BOP score of 30% and generalized
clinical attachment loss of 3 mm with no gingival recession. The radiographs indicate generalized
horizontal bone that account for a % of bone loss/age of 0.20. What is Mr. Stevens's periodontal
classification?
A. Generalized periodontitis stage I, grade B
B. Generalized periodontitis stage III, grade B
C. Generalized dental biofilm-induced gingivitis on an intact periodontium
D. Generalized periodontitis stage II, grade A
Elder abuse - CORRECT ANSWER✅✅✅Mrs. Ridley, 81 years old, is now living with her daughter's
family. When she presents for her 9-month continuing care appointment, she appears withdrawn and
anxious even though she has been a longstanding client in the practice. During the intraoral assessment,
the dental hygienist notes poor oral hygiene, a fractured upper denture, and bruising of the edentulous
ridge. What should the dental hygienist suspect?
A. Iron deficiency
B. Dementia
C. Self-neglect
D. Elder abuse
Fluoride varnish - CORRECT ANSWER✅✅✅Mr. Applebaum, 29 years old, presents for his annual
continuing care appointment. He reports extreme sensitivity to cold in the mandibular right quadrant.
Intraoral findings reveal localized gingival recession of 4 mm on teeth 43 and 44. What should the dental
hygienist recommend for Mr. Applebaum?
A. Acidulated phosphate fluoride
B. Fluoride varnish
C. Composite restorations
D. Gingival graft
