DENTAL HYGIENE EXAM 4 ACTUAL QUESTIONS WITH 100%
VERIFIED SOLUTIONS-2024-2025- GRADED A+
Which of the following statements regarding dental caries are true EXCEPT one, which of the following
statements is incorrect?
A. Caries is an infectious disease
b. Caries is a transmittable disease
c. Caries is an eradicated disease
d. Caries is a preventable disease
C. Caries is an eradicated disease
Which of the following bacteria are the infectious organisms that colonize the teeth, help form dental
biofilm, and are responsible for the dental caries process?
A. Bacteroides forsythus
b. Streptococcus mutans
c. Prevotella intermedia
d. Eubacterium nodatum
e. Streptococcus intermedius complex
B. Streptococcus mutans
All of the following are considered fermentable carbohydrates EXCEPT one. Which of the following is not
a fermentable carbohydrate?
A. Xyitol
b. Sucrose
C. Fruscotse
D. Cooked starch
E. Glucose
A. Xyitol
Acids are a byproduct of metabolic processes. All of the following acids are produced during metabolic
processes except one. Which acid is not a byproduct of metabolic processes?
A. Acetic acid
b. Lactic acid
c. Formic acid
d. Phosphoric acid
D. Phosphoric acid
Saliva has many protective functions in the oral cavity. Which of the following is the most important
protective property of saliva in the caries process?
,A. Buffering of acids
b. Aid in digestion
c. Aid in speech
d. Carrier of antibiotics
A. Buffering of acids
All of the following are mechanisms of action of fluoride in the prevention of caries EXCEPT one. Which
of the following actions of fluoride is not associated with the prevention of caries?
A. Inhibits demineralization
b. Passes through diffusion channels to increase acid levels
c. Enhances reminerralization
d. Inhibits bacteria in the biofilm
e. Interferes with enzyme activity in bacteria
B. Passes through diffusion channels to increase acid levels
Bitewing radiographs should ne recommended every ___ for the moderate risk patient
a. 6 months
b. 24-36 monts
c. 18-24 months
d. 6-18 months
C. 18-24 months
Remineralizing tooth surfaces should not be scratched or altered in any way. Which of the following
techniques would be the most acceptable way to detect coronal caries on a demineralized surface?
A. Panorex radiograph
b. Sharp explorer
c. Irrigating syringe
d. Curing light
e. Blunt probe
E. Blunt probe
Which of the following radiographs is the best choice to detect caries on proximal tooth surfaces?
A. Periapical radiograph
b. Occlusal radiograph
c. Panorex radiograph
d. Bitewing radiograph
D. Bitewing radiograph
Your patient presents with a definitive carious lesion diagnosed by the dentist. Which is the treatment
plan for a cavitated carious lesion?
, A. Take a "wait and see" approach
b. Send the patient for a second opinion
c. Expose a radiograph just to be sure
d. Wait until symptoms develop before treatment
e. Appoint for a restoration
E. Appoint for a restoration
There has been a reduction in caries in the U.S since 1945, attributed to the fluoridation of the water
supplies in certain communities. Which of the following is the percentage reduction in caries found?
A. 80%
b. 10%
c. 40%
d. 30%
C. 40%
A habit, behavior, lifestyle. Or condition that when present increases the probability of a disease
occurring is a term often used is a term often used in medical research. Which of the following best fits
this description?
A. Risk factor
b. Common factor
c. Likely factor
d. Arbitrary factor
A. Risk factor
An individual can be the "high-risk" or "low-risk" category for development of dental caries. All of the
following factors are low-risk factors in the development of dental caries for adults EXCEPT one. Which
one of the following factors is not low risk?
A. Normal salivary flow
b. Uses xylitol gum
c. Sealants in pits and fissures
d. Poor manual dexterity
e. Regularly scheduled dental visits
D. Poor manual dexterity
You have been hired as a dental hygienist at the Health Department dental clinic in your county. The
patient population in this facility is predominately low-income. There is no community water
fluoridation in the area. Most of your patients do not follow a healthy lifestyle through diet and exercise.
VERIFIED SOLUTIONS-2024-2025- GRADED A+
Which of the following statements regarding dental caries are true EXCEPT one, which of the following
statements is incorrect?
A. Caries is an infectious disease
b. Caries is a transmittable disease
c. Caries is an eradicated disease
d. Caries is a preventable disease
C. Caries is an eradicated disease
Which of the following bacteria are the infectious organisms that colonize the teeth, help form dental
biofilm, and are responsible for the dental caries process?
A. Bacteroides forsythus
b. Streptococcus mutans
c. Prevotella intermedia
d. Eubacterium nodatum
e. Streptococcus intermedius complex
B. Streptococcus mutans
All of the following are considered fermentable carbohydrates EXCEPT one. Which of the following is not
a fermentable carbohydrate?
A. Xyitol
b. Sucrose
C. Fruscotse
D. Cooked starch
E. Glucose
A. Xyitol
Acids are a byproduct of metabolic processes. All of the following acids are produced during metabolic
processes except one. Which acid is not a byproduct of metabolic processes?
A. Acetic acid
b. Lactic acid
c. Formic acid
d. Phosphoric acid
D. Phosphoric acid
Saliva has many protective functions in the oral cavity. Which of the following is the most important
protective property of saliva in the caries process?
,A. Buffering of acids
b. Aid in digestion
c. Aid in speech
d. Carrier of antibiotics
A. Buffering of acids
All of the following are mechanisms of action of fluoride in the prevention of caries EXCEPT one. Which
of the following actions of fluoride is not associated with the prevention of caries?
A. Inhibits demineralization
b. Passes through diffusion channels to increase acid levels
c. Enhances reminerralization
d. Inhibits bacteria in the biofilm
e. Interferes with enzyme activity in bacteria
B. Passes through diffusion channels to increase acid levels
Bitewing radiographs should ne recommended every ___ for the moderate risk patient
a. 6 months
b. 24-36 monts
c. 18-24 months
d. 6-18 months
C. 18-24 months
Remineralizing tooth surfaces should not be scratched or altered in any way. Which of the following
techniques would be the most acceptable way to detect coronal caries on a demineralized surface?
A. Panorex radiograph
b. Sharp explorer
c. Irrigating syringe
d. Curing light
e. Blunt probe
E. Blunt probe
Which of the following radiographs is the best choice to detect caries on proximal tooth surfaces?
A. Periapical radiograph
b. Occlusal radiograph
c. Panorex radiograph
d. Bitewing radiograph
D. Bitewing radiograph
Your patient presents with a definitive carious lesion diagnosed by the dentist. Which is the treatment
plan for a cavitated carious lesion?
, A. Take a "wait and see" approach
b. Send the patient for a second opinion
c. Expose a radiograph just to be sure
d. Wait until symptoms develop before treatment
e. Appoint for a restoration
E. Appoint for a restoration
There has been a reduction in caries in the U.S since 1945, attributed to the fluoridation of the water
supplies in certain communities. Which of the following is the percentage reduction in caries found?
A. 80%
b. 10%
c. 40%
d. 30%
C. 40%
A habit, behavior, lifestyle. Or condition that when present increases the probability of a disease
occurring is a term often used is a term often used in medical research. Which of the following best fits
this description?
A. Risk factor
b. Common factor
c. Likely factor
d. Arbitrary factor
A. Risk factor
An individual can be the "high-risk" or "low-risk" category for development of dental caries. All of the
following factors are low-risk factors in the development of dental caries for adults EXCEPT one. Which
one of the following factors is not low risk?
A. Normal salivary flow
b. Uses xylitol gum
c. Sealants in pits and fissures
d. Poor manual dexterity
e. Regularly scheduled dental visits
D. Poor manual dexterity
You have been hired as a dental hygienist at the Health Department dental clinic in your county. The
patient population in this facility is predominately low-income. There is no community water
fluoridation in the area. Most of your patients do not follow a healthy lifestyle through diet and exercise.
