NBDHE Practice Test Questions with
Certified Solutions
What is the primary role of dental sealants?
a) To whiten teeth
b) To treat gum disease
✔✔c) To prevent cavities in the grooves of the teeth
d) To replace missing teeth
Which bacteria is most commonly associated with periodontal disease?
a) Streptococcus mutans
b) Lactobacillus acidophilus
✔✔c) Porphyromonas gingivalis
d) Actinomyces israelii
What does the term "dental prophylaxis" refer to?
1
,a) Tooth extraction
✔✔b) Professional teeth cleaning
c) Placement of dental crowns
d) Root canal therapy
Which part of the tooth is covered by enamel?
a) Root
✔✔b) Crown
c) Dentin
d) Pulp
What is the best method for preventing dental caries?
a) Using mouthwash
b) Brushing only once a day
✔✔c) Brushing twice a day and flossing daily
d) Rinsing with water after every meal
2
,What is the main purpose of fluoride in toothpaste?
a) To whiten teeth
b) To make the toothpaste foamy
✔✔c) To strengthen enamel and prevent cavities
d) To freshen breath
What type of X-ray is used to assess the entire tooth structure from the crown to the root?
a) Bitewing X-ray
b) Panoramic X-ray
✔✔c) Periapical X-ray
d) Occlusal X-ray
Which instrument is used to measure pocket depths around the teeth?
a) Explorer
3
, b) Ultrasonic scaler
✔✔c) Periodontal probe
d) Air-water syringe
What is the most common type of tooth restoration used to repair a cavity?
a) Dental implant
b) Dental bridge
✔✔c) Dental filling
d) Veneer
What is a common symptom of temporomandibular joint (TMJ) disorder?
a) Bad breath
b) Loose teeth
✔✔c) Jaw pain or discomfort
d) Increased tooth sensitivity
4
Certified Solutions
What is the primary role of dental sealants?
a) To whiten teeth
b) To treat gum disease
✔✔c) To prevent cavities in the grooves of the teeth
d) To replace missing teeth
Which bacteria is most commonly associated with periodontal disease?
a) Streptococcus mutans
b) Lactobacillus acidophilus
✔✔c) Porphyromonas gingivalis
d) Actinomyces israelii
What does the term "dental prophylaxis" refer to?
1
,a) Tooth extraction
✔✔b) Professional teeth cleaning
c) Placement of dental crowns
d) Root canal therapy
Which part of the tooth is covered by enamel?
a) Root
✔✔b) Crown
c) Dentin
d) Pulp
What is the best method for preventing dental caries?
a) Using mouthwash
b) Brushing only once a day
✔✔c) Brushing twice a day and flossing daily
d) Rinsing with water after every meal
2
,What is the main purpose of fluoride in toothpaste?
a) To whiten teeth
b) To make the toothpaste foamy
✔✔c) To strengthen enamel and prevent cavities
d) To freshen breath
What type of X-ray is used to assess the entire tooth structure from the crown to the root?
a) Bitewing X-ray
b) Panoramic X-ray
✔✔c) Periapical X-ray
d) Occlusal X-ray
Which instrument is used to measure pocket depths around the teeth?
a) Explorer
3
, b) Ultrasonic scaler
✔✔c) Periodontal probe
d) Air-water syringe
What is the most common type of tooth restoration used to repair a cavity?
a) Dental implant
b) Dental bridge
✔✔c) Dental filling
d) Veneer
What is a common symptom of temporomandibular joint (TMJ) disorder?
a) Bad breath
b) Loose teeth
✔✔c) Jaw pain or discomfort
d) Increased tooth sensitivity
4
