NDEE Exam 6 | Complete Questions
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with Correct Answers and Detailed
Rationales - Latest Update 2026
1. A dental professional is reviewing a patient’s medical history. Which condition
requires special consideration before treatment?
A. Seasonal allergies
B. Uncontrolled hypertension
C. Mild myopia
D. History of motion sickness
Answer: B
Rationale: Uncontrolled hypertension may increase the risk of cardiovascular
complications during dental procedures and requires appropriate assessment and
management.
2. Which infection control practice is most effective in preventing transmission of
microorganisms?
A. Wearing jewelry-free uniforms
B. Performing proper hand hygiene
C. Using air fresheners
D. Limiting patient communication
Answer: B
Rationale: Hand hygiene is the primary method for reducing healthcare-associated
infection transmission.
3. Which structure is responsible for producing saliva?
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,https://www.stuvia.com/en-us/user/Lectdavian
A. Thyroid gland
B. Salivary glands
C. Lymph nodes
D. Tonsils
Answer: B
Rationale: Major salivary glands produce saliva that assists with digestion, lubrication,
and oral protection.
4. A patient reports a severe allergy to latex. Which action is appropriate?
A. Use latex-containing equipment if covered
B. Provide latex-free supplies
C. Schedule the patient last without precautions
D. Ignore the allergy if symptoms are absent
Answer: B
Rationale: Latex exposure can cause serious allergic reactions. Latex-free materials
should be used.
5. Which microorganism is primarily associated with dental caries?
A. Streptococcus mutans
B. Escherichia coli
C. Staphylococcus aureus
D. Candida albicans
Answer: A
Rationale: Streptococcus mutans contributes significantly to enamel demineralization
and caries development.
6. Which instrument is commonly used to detect calculus deposits?
A. Explorer
B. Mouth mirror only
https://www.stuvia.com/en-us/user/Lectdavian
,https://www.stuvia.com/en-us/user/Lectdavian
C. Impression tray
D. High-volume evacuator
Answer: A
Rationale: Explorers are used to detect irregularities, calculus, and tooth surfaces.
7. What is the purpose of fluoride in dentistry?
A. Increase bacterial growth
B. Strengthen enamel and reduce caries risk
C. Remove calculus mechanically
D. Whiten dentin permanently
Answer: B
Rationale: Fluoride promotes remineralization and increases resistance to acid
attacks.
8. Which radiographic technique is used to examine interproximal caries?
A. Bitewing radiographs
B. Occlusal radiographs
C. Panoramic radiographs only
D. Cephalometric radiographs
Answer: A
Rationale: Bitewings are ideal for detecting interproximal decay and evaluating bone
levels.
9. A patient taking anticoagulants is scheduled for dental treatment. What is the priority
consideration?
A. Assess bleeding risk and medical history
B. Discontinue medication independently
C. Avoid all dental care
D. Increase treatment speed
Answer: A
https://www.stuvia.com/en-us/user/Lectdavian
, https://www.stuvia.com/en-us/user/Lectdavian
Rationale: Anticoagulant therapy affects bleeding risk and requires coordination with
healthcare providers when necessary.
10. Which PPE protects the mucous membranes of the eyes during procedures?
A. Gloves only
B. Protective eyewear
C. Shoe covers
D. Hair covering
Answer: B
Rationale: Protective eyewear prevents exposure to splashes and aerosols.
11. The primary function of enamel is to:
A. Produce blood cells
B. Protect the tooth surface
C. Support nerve transmission
D. Attach muscles to bone
Answer: B
Rationale: Enamel is the hardest tissue in the human body and protects underlying
tooth structures.
12. Which condition involves inflammation of the gingiva?
A. Gingivitis
B. Bruxism
C. Malocclusion
D. Edentulism
Answer: A
Rationale: Gingivitis is inflammation of gingival tissues commonly caused by plaque
accumulation.
https://www.stuvia.com/en-us/user/Lectdavian
https://www.stuvia.com/en-us/user/Lectdavian
with Correct Answers and Detailed
Rationales - Latest Update 2026
1. A dental professional is reviewing a patient’s medical history. Which condition
requires special consideration before treatment?
A. Seasonal allergies
B. Uncontrolled hypertension
C. Mild myopia
D. History of motion sickness
Answer: B
Rationale: Uncontrolled hypertension may increase the risk of cardiovascular
complications during dental procedures and requires appropriate assessment and
management.
2. Which infection control practice is most effective in preventing transmission of
microorganisms?
A. Wearing jewelry-free uniforms
B. Performing proper hand hygiene
C. Using air fresheners
D. Limiting patient communication
Answer: B
Rationale: Hand hygiene is the primary method for reducing healthcare-associated
infection transmission.
3. Which structure is responsible for producing saliva?
https://www.stuvia.com/en-us/user/Lectdavian
,https://www.stuvia.com/en-us/user/Lectdavian
A. Thyroid gland
B. Salivary glands
C. Lymph nodes
D. Tonsils
Answer: B
Rationale: Major salivary glands produce saliva that assists with digestion, lubrication,
and oral protection.
4. A patient reports a severe allergy to latex. Which action is appropriate?
A. Use latex-containing equipment if covered
B. Provide latex-free supplies
C. Schedule the patient last without precautions
D. Ignore the allergy if symptoms are absent
Answer: B
Rationale: Latex exposure can cause serious allergic reactions. Latex-free materials
should be used.
5. Which microorganism is primarily associated with dental caries?
A. Streptococcus mutans
B. Escherichia coli
C. Staphylococcus aureus
D. Candida albicans
Answer: A
Rationale: Streptococcus mutans contributes significantly to enamel demineralization
and caries development.
6. Which instrument is commonly used to detect calculus deposits?
A. Explorer
B. Mouth mirror only
https://www.stuvia.com/en-us/user/Lectdavian
,https://www.stuvia.com/en-us/user/Lectdavian
C. Impression tray
D. High-volume evacuator
Answer: A
Rationale: Explorers are used to detect irregularities, calculus, and tooth surfaces.
7. What is the purpose of fluoride in dentistry?
A. Increase bacterial growth
B. Strengthen enamel and reduce caries risk
C. Remove calculus mechanically
D. Whiten dentin permanently
Answer: B
Rationale: Fluoride promotes remineralization and increases resistance to acid
attacks.
8. Which radiographic technique is used to examine interproximal caries?
A. Bitewing radiographs
B. Occlusal radiographs
C. Panoramic radiographs only
D. Cephalometric radiographs
Answer: A
Rationale: Bitewings are ideal for detecting interproximal decay and evaluating bone
levels.
9. A patient taking anticoagulants is scheduled for dental treatment. What is the priority
consideration?
A. Assess bleeding risk and medical history
B. Discontinue medication independently
C. Avoid all dental care
D. Increase treatment speed
Answer: A
https://www.stuvia.com/en-us/user/Lectdavian
, https://www.stuvia.com/en-us/user/Lectdavian
Rationale: Anticoagulant therapy affects bleeding risk and requires coordination with
healthcare providers when necessary.
10. Which PPE protects the mucous membranes of the eyes during procedures?
A. Gloves only
B. Protective eyewear
C. Shoe covers
D. Hair covering
Answer: B
Rationale: Protective eyewear prevents exposure to splashes and aerosols.
11. The primary function of enamel is to:
A. Produce blood cells
B. Protect the tooth surface
C. Support nerve transmission
D. Attach muscles to bone
Answer: B
Rationale: Enamel is the hardest tissue in the human body and protects underlying
tooth structures.
12. Which condition involves inflammation of the gingiva?
A. Gingivitis
B. Bruxism
C. Malocclusion
D. Edentulism
Answer: A
Rationale: Gingivitis is inflammation of gingival tissues commonly caused by plaque
accumulation.
https://www.stuvia.com/en-us/user/Lectdavian
