100+ Free DANB CPFDA Practice Questions

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What is the primary purpose of dental sealants?

To whiten the tooth surface

To restore decayed teeth

To replace lost tooth structure

To protect pit and fissure surfaces of teeth from caries

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2026 Statistics

Key Facts: DANB CPFDA Exam

175

Total Questions

DANB (CP 75 + SE 50 + TF 50)

140 min

Total Exam Time

DANB (CP 60 + SE 40 + TF 40)

$595

Total Exam Cost

2026 CPFDA Application Packet

400

Passing Scaled Score

DANB scoring model (100-900 scale)

381,900

Dental Assistant Jobs (2024)

BLS

Job Growth (2024-2034)

BLS

DANB lists the CPFDA as three component exams totaling 175 questions in 140 minutes: CP (75 questions, 60 min, $245), SE (50 questions, 40 min, $175), and TF (50 questions, 40 min, $175). Total cost is $595. DANB uses CAT scoring with a scaled pass score of 400 per component. The CP exam outline was updated 03/12/2025. No eligibility requirements for any component. Remote online proctoring is available.

Sample DANB CPFDA Practice Questions

Try these sample questions to test your DANB CPFDA exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1What is the primary purpose of coronal polishing in dentistry?

A.To remove subgingival calculus

B.To remove plaque, stain, and debris from the clinical crown of the tooth

C.To whiten teeth by multiple shades

D.To apply a permanent protective coating

Explanation: Coronal polishing removes plaque, extrinsic stain, and debris from the exposed (clinical) crown of the tooth. It is a cosmetic and preparatory procedure, not a substitute for prophylaxis, which also includes scaling.

2Which type of dental stain is caused by chromogenic bacteria and can be removed by coronal polishing?

A.Intrinsic stain from tetracycline

B.Extrinsic stain

C.Developmental enamel stain

D.Stain from dental fluorosis

Explanation: Extrinsic stains are deposited on the external tooth surface from chromogenic bacteria, foods, beverages, and tobacco. They can be removed by coronal polishing because they reside on or within the acquired pellicle layer.

3When performing rubber cup polishing, what speed should the handpiece be operated at to prevent heat generation and enamel damage?

A.High speed with intermittent contact

B.Slow speed with light, intermittent pressure

C.Maximum speed with continuous pressure

D.Speed does not matter if enough paste is used

Explanation: Rubber cup polishing should be performed at slow speed (below 3,000 rpm) with light, intermittent pressure. This prevents frictional heat generation that can damage the pulp, preserves enamel, and allows the polishing agent to work effectively.

4Which of the following is a contraindication for coronal polishing?

A.Light extrinsic stain on enamel

B.Areas of demineralization or decalcification

C.A patient requiring fluoride application

D.A patient with healthy gingival tissue

Explanation: Demineralized or decalcified enamel (white spot lesions) should NOT be polished because the abrasive action removes additional weakened enamel structure, worsening the condition. These areas need remineralization treatment instead.

5What is the correct polishing stroke technique when using a rubber cup?

A.Move the cup rapidly back and forth across the entire tooth surface

B.Use a systematic wiping stroke from the gingival third to the incisal/occlusal edge

C.Apply constant heavy pressure in one direction only

D.Keep the cup stationary on each surface for 10 seconds

Explanation: The correct technique is a systematic wiping or sweeping stroke, moving from the gingival third toward the incisal or occlusal edge. This ensures complete coverage while directing debris away from the gingival sulcus.

6Which polishing agent has the finest (least abrasive) particle size?

A.Coarse pumice

B.Tin oxide (super fine)

C.Medium pumice

D.Zirconium silicate

Explanation: Tin oxide is a super-fine polishing agent used for final high-luster polishing. It has the smallest particle size among common polishing agents and removes the least amount of tooth structure while creating the smoothest surface.

7What is the primary purpose of dental sealants?

A.To restore decayed teeth

B.To protect pit and fissure surfaces of teeth from caries

C.To replace lost tooth structure

D.To whiten the tooth surface

Explanation: Dental sealants are thin resin coatings applied to the pit and fissure surfaces of teeth (primarily premolars and molars) to seal out bacteria and food particles, preventing caries development in these vulnerable areas.

8Which teeth are the most common candidates for dental sealant placement?

A.Mandibular anterior teeth

B.Permanent premolars and molars with deep pits and fissures

C.Primary incisors

D.Teeth with existing large restorations

Explanation: Permanent premolars and molars with deep pits and fissures are the primary candidates for sealant placement because these anatomical features trap bacteria and food, making them highly susceptible to occlusal caries.

9What is the most critical factor for sealant retention?

A.Using a colored sealant material

B.Maintaining a dry field during application

C.Applying the sealant as thickly as possible

D.Using fluoride varnish before sealant placement

Explanation: Maintaining a completely dry field is the most critical factor for sealant retention. Moisture contamination (saliva) on the etched enamel surface prevents the sealant resin from penetrating the etch pattern, leading to poor bonding and premature sealant loss.

10What concentration of phosphoric acid is typically used for acid etching before sealant placement?

A.10-15%

B.35-37%

C.50-60%

D.75-80%

Explanation: Phosphoric acid at 35-37% concentration is the standard etchant used before sealant placement. It creates microscopic porosities in the enamel surface that allow the sealant material to flow in and form mechanical retention tags.

About the DANB CPFDA Exam

The DANB Certified Preventive Functions Dental Assistant (CPFDA) credential combines three component exams: Coronal Polishing (CP), Sealants (SE), and Topical Fluoride (TF). It validates knowledge-based competence in preventive dental procedures that many states authorize dental assistants to perform.

Questions

175 scored questions

Time Limit

2 hours 20 minutes

Passing Score

Scaled score 400 per component

Exam Fee

$595 (DANB / Pearson VUE)

DANB CPFDA Exam Content Outline

75 questions (CP)

Coronal Polishing (CP)

Evaluation (15%), instruments and materials (20%), procedures (39%), administration (26%)

50 questions (SE)

Sealants (SE)

Evaluation (20%), armamentarium (20%), procedures (40%), administration (20%)

50 questions (TF)

Topical Fluoride (TF)

Evaluation (20%), armamentarium (20%), procedures (40%), administration (20%)

How to Pass the DANB CPFDA Exam

What You Need to Know

Passing score: Scaled score 400 per component
Exam length: 175 questions
Time limit: 2 hours 20 minutes
Exam fee: $595

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

DANB CPFDA Study Tips from Top Performers

1Start with Coronal Polishing (CP) — the largest component with 75 questions and the highest individual exam fee

2For sealants, master the acid-etch technique and isolation requirements since moisture is the #1 cause of sealant failure

3Study fluoride safety thoroughly: know the Safely Tolerated Dose, emergency protocols, and contraindications

4Review scope of practice laws in your state since allowable preventive functions vary significantly

5Practice timed sets for each component to build confidence with the 40-60 minute time limits

Frequently Asked Questions

How many questions are on the DANB CPFDA exam?

DANB lists the combined CPFDA at 175 questions total: 75 Coronal Polishing (CP), 50 Sealants (SE), and 50 Topical Fluoride (TF).

How much does the DANB CPFDA exam cost?

The total cost for all three CPFDA component exams is $595: CP $245, SE $175, and TF $175. Component exams can be taken separately.

Are there eligibility requirements for the CPFDA?

No. DANB lists no eligibility requirements for the CP, SE, or TF component exams. Anyone can apply and take the exams.

Can I take the CPFDA exams online?

Yes. DANB offers remote online proctoring for the CP, SE, and TF exams in addition to in-person testing at Pearson VUE centers.

What is the CPFDA annual renewal cost?

CPFDA certification renewal costs $110 per year and requires continuing dental education credits and current CPR certification.

100+ Free DANB CPFDA Practice Questions

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