DANB Exam Prep 2026/2027: 130 Practice Questions
University/College: University of North Carolina at Chapel Hill – Adams School of Dentistry /
Dental Assisting Program
Subject: Dental Assisting National Board (DANB) Certification – CDA Exam Preparation
Course Code: DENT 101 – Clinical Dental Assisting / DANB Board Review
EXAM CONTENT OUTLINE
Based on the official DANB CDA Exam Blueprint:
1. General Chairside Assisting (GC) – Clinical procedures, patient care, and materials
2. Infection Control (ICE) – OSHA/CDC guidelines, sterilization, and safety
3. Radiation Health and Safety (RHS) – Radiography principles, safety, and techniques
4. Dental Materials – Properties, manipulation, and application
5. Preventive Dentistry – Fluoride, sealants, and patient education
6. Dental Anatomy and Physiology – Tooth morphology and oral structures
7. Patient Management and Communication – Professionalism and patient interaction
8. Dental Office Emergencies – Medical emergencies and first aid
9. Pharmacology and Anesthesia – Local anesthetics and emergency drugs
10. Ethics and Jurisprudence – Legal and ethical standards
SECTION A: GENERAL CHAIRSIDE ASSISTING (GC) – Questions 1-35
Question 1
Which instrument is primarily used to remove supragingival calculus?
A) Explorer
B) Curette
C) Sickle scaler
D) Hoe scaler
Answer: C
Explanation: A sickle scaler has a pointed tip and triangular cross-section, making it ideal for
removing supragingival calculus. Curettes are used for subgingival scaling.
Question 2
What is the main purpose of a dental dam?
,A) Improve visibility
B) Isolate the operative field
C) Reduce patient anxiety
D) Prevent saliva secretion
Answer: B
Explanation: A dental dam isolates the operative field, keeping the area dry and free from
contamination during dental procedures.
Question 3
What is the correct order of the four-handed dentistry positioning for the dental assistant?
A) 7 o'clock to 9 o'clock position
B) 8 o'clock to 11 o'clock position
C) 10 o'clock to 12 o'clock position
D) 2 o'clock to 4 o'clock position
Answer: B
Explanation: The dental assistant typically operates from the 8 o'clock to 11 o'clock position,
allowing optimal access to the patient and efficient transfer of instruments.
Question 4
Which high-speed handpiece bur is used for removing decay and shaping cavity preparations?
A) Diamond bur
B) Carbide bur
C) Finishing bur
D) Polishing bur
Answer: B
Explanation: Carbide burs are designed for cutting tooth structure and removing decay
efficiently. Diamond burs are typically used for gross tooth reduction.
Question 5
What is the primary function of an explorer in dental examinations?
A) To remove calculus
B) To detect caries and calculus
C) To polish teeth
D) To place restorative materials
,Answer: B
Explanation: The explorer is used to detect caries (tooth decay) and calculus (tartar) by feeling
for roughness or stickiness on tooth surfaces.
Question 6
When mixing dental cement, how should the powder and liquid be incorporated?
A) Rapidly in large increments
B) Slowly with a spatula using a folding motion
C) By shaking the mixing pad
D) By stirring vigorously
Answer: B
Explanation: Cement should be mixed slowly using a folding motion with a spatula to
incorporate the powder into the liquid, avoiding air bubbles and ensuring a smooth consistency.
Question 7
What is the ideal thickness of a rubber dam for isolation?
A) Thin (light) – 0.15mm
B) Medium – 0.20mm
C) Heavy – 0.25mm
D) Extra heavy – 0.30mm
Answer: B
Explanation: Medium thickness (approximately 0.20mm) is most commonly used as it provides
good isolation while being easy to place and comfortable for the patient.
Question 8
Which of the following is NOT a component of the basic dental examination setup?
A) Mouth mirror
B) Explorer
C) Periodontal probe
D) Dental floss
Answer: D
Explanation: The basic dental examination setup includes a mouth mirror, explorer, and
periodontal probe. Dental floss is not part of the standard examination instrument tray.
, Question 9
What is the correct technique for transferring a dental instrument to the dentist?
A) Place it on the patient's chest
B) Pass it with the working end pointing toward the dentist
C) Pass it with the working end pointing toward yourself
D) Throw it to the dentist
Answer: B
Explanation: Instruments should be passed with the working end pointing toward the dentist,
allowing for easy grasping and immediate use without reorienting the instrument.
Question 10
Which suction tip is designed for high-volume evacuation?
A) Saliva ejector
B) HVE tip
C) Cotton roll holder
D) Tongue depressor
Answer: B
Explanation: High-Volume Evacuator (HVE) tips are larger and designed to remove large
volumes of water, debris, and aerosols during dental procedures.
Question 11
What is the purpose of a dental matrix band?
A) To isolate the tooth
B) To provide a temporary restoration
C) To confine restorative material during placement
D) To protect adjacent teeth
Answer: C
Explanation: A matrix band confines restorative material (such as amalgam or composite) during
placement, providing a wall against which the material can be condensed.
Question 12
Which bur is most appropriate for finishing and polishing restorations?
A) Diamond bur
B) Carbide bur
University/College: University of North Carolina at Chapel Hill – Adams School of Dentistry /
Dental Assisting Program
Subject: Dental Assisting National Board (DANB) Certification – CDA Exam Preparation
Course Code: DENT 101 – Clinical Dental Assisting / DANB Board Review
EXAM CONTENT OUTLINE
Based on the official DANB CDA Exam Blueprint:
1. General Chairside Assisting (GC) – Clinical procedures, patient care, and materials
2. Infection Control (ICE) – OSHA/CDC guidelines, sterilization, and safety
3. Radiation Health and Safety (RHS) – Radiography principles, safety, and techniques
4. Dental Materials – Properties, manipulation, and application
5. Preventive Dentistry – Fluoride, sealants, and patient education
6. Dental Anatomy and Physiology – Tooth morphology and oral structures
7. Patient Management and Communication – Professionalism and patient interaction
8. Dental Office Emergencies – Medical emergencies and first aid
9. Pharmacology and Anesthesia – Local anesthetics and emergency drugs
10. Ethics and Jurisprudence – Legal and ethical standards
SECTION A: GENERAL CHAIRSIDE ASSISTING (GC) – Questions 1-35
Question 1
Which instrument is primarily used to remove supragingival calculus?
A) Explorer
B) Curette
C) Sickle scaler
D) Hoe scaler
Answer: C
Explanation: A sickle scaler has a pointed tip and triangular cross-section, making it ideal for
removing supragingival calculus. Curettes are used for subgingival scaling.
Question 2
What is the main purpose of a dental dam?
,A) Improve visibility
B) Isolate the operative field
C) Reduce patient anxiety
D) Prevent saliva secretion
Answer: B
Explanation: A dental dam isolates the operative field, keeping the area dry and free from
contamination during dental procedures.
Question 3
What is the correct order of the four-handed dentistry positioning for the dental assistant?
A) 7 o'clock to 9 o'clock position
B) 8 o'clock to 11 o'clock position
C) 10 o'clock to 12 o'clock position
D) 2 o'clock to 4 o'clock position
Answer: B
Explanation: The dental assistant typically operates from the 8 o'clock to 11 o'clock position,
allowing optimal access to the patient and efficient transfer of instruments.
Question 4
Which high-speed handpiece bur is used for removing decay and shaping cavity preparations?
A) Diamond bur
B) Carbide bur
C) Finishing bur
D) Polishing bur
Answer: B
Explanation: Carbide burs are designed for cutting tooth structure and removing decay
efficiently. Diamond burs are typically used for gross tooth reduction.
Question 5
What is the primary function of an explorer in dental examinations?
A) To remove calculus
B) To detect caries and calculus
C) To polish teeth
D) To place restorative materials
,Answer: B
Explanation: The explorer is used to detect caries (tooth decay) and calculus (tartar) by feeling
for roughness or stickiness on tooth surfaces.
Question 6
When mixing dental cement, how should the powder and liquid be incorporated?
A) Rapidly in large increments
B) Slowly with a spatula using a folding motion
C) By shaking the mixing pad
D) By stirring vigorously
Answer: B
Explanation: Cement should be mixed slowly using a folding motion with a spatula to
incorporate the powder into the liquid, avoiding air bubbles and ensuring a smooth consistency.
Question 7
What is the ideal thickness of a rubber dam for isolation?
A) Thin (light) – 0.15mm
B) Medium – 0.20mm
C) Heavy – 0.25mm
D) Extra heavy – 0.30mm
Answer: B
Explanation: Medium thickness (approximately 0.20mm) is most commonly used as it provides
good isolation while being easy to place and comfortable for the patient.
Question 8
Which of the following is NOT a component of the basic dental examination setup?
A) Mouth mirror
B) Explorer
C) Periodontal probe
D) Dental floss
Answer: D
Explanation: The basic dental examination setup includes a mouth mirror, explorer, and
periodontal probe. Dental floss is not part of the standard examination instrument tray.
, Question 9
What is the correct technique for transferring a dental instrument to the dentist?
A) Place it on the patient's chest
B) Pass it with the working end pointing toward the dentist
C) Pass it with the working end pointing toward yourself
D) Throw it to the dentist
Answer: B
Explanation: Instruments should be passed with the working end pointing toward the dentist,
allowing for easy grasping and immediate use without reorienting the instrument.
Question 10
Which suction tip is designed for high-volume evacuation?
A) Saliva ejector
B) HVE tip
C) Cotton roll holder
D) Tongue depressor
Answer: B
Explanation: High-Volume Evacuator (HVE) tips are larger and designed to remove large
volumes of water, debris, and aerosols during dental procedures.
Question 11
What is the purpose of a dental matrix band?
A) To isolate the tooth
B) To provide a temporary restoration
C) To confine restorative material during placement
D) To protect adjacent teeth
Answer: C
Explanation: A matrix band confines restorative material (such as amalgam or composite) during
placement, providing a wall against which the material can be condensed.
Question 12
Which bur is most appropriate for finishing and polishing restorations?
A) Diamond bur
B) Carbide bur
