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Exam Review

Key Facts: DANB CRFDA Exam

230

Total Questions

DANB (RF 80 + TMP 50 + IM 50 + SE 50)

180 min

Total Exam Time

DANB (RF 60 + TMP 40 + IM 40 + SE 40)

$700

Total Exam Cost

2026 CRFDA Application Packet

400

Passing Scaled Score

DANB scoring model (100-900 scale)

381,900

Dental Assistant Jobs (2024)

BLS

8%

Job Growth (2024-2034)

BLS

DANB lists the CRFDA as four component exams totaling 230 questions in 180 minutes: RF (80 questions, 60 min, $275), TMP (50 questions, 40 min, $125), IM (50 questions, 40 min, $125), and SE (50 questions, 40 min, $175). Total cost is $700. DANB uses CAT scoring with a scaled pass score of 400. Remote online proctoring is available for all components.

Sample DANB CRFDA Practice Questions

Try these sample questions to review concepts for the DANB CRFDA exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In the Universal Numbering System used in the United States, which tooth is designated #14?
A.Maxillary right first molar
B.Maxillary left first molar
C.Mandibular left first molar
D.Mandibular right first molar
Explanation: The Universal Numbering System assigns 1-32 to permanent teeth starting at the maxillary right third molar (#1) and proceeding clockwise to the maxillary left third molar (#16), then continuing along the mandibular arch. Tooth #14 is the maxillary left first molar.
2Which dental tissue is the hardest, most highly mineralized substance in the human body?
A.Dentin
B.Enamel
C.Cementum
D.Pulp
Explanation: Enamel covers the anatomic crown and is approximately 96% inorganic hydroxyapatite, making it the hardest, most mineralized tissue in the human body. Its structure of enamel rods provides strength but limited flexibility.
3How many permanent teeth are in a complete adult dentition, and how many are primary teeth in a complete child dentition?
A.28 permanent and 24 primary
B.32 permanent and 20 primary
C.30 permanent and 22 primary
D.32 permanent and 24 primary
Explanation: A complete permanent dentition contains 32 teeth (8 incisors, 4 canines, 8 premolars, 12 molars including third molars). A complete primary dentition contains 20 teeth (8 incisors, 4 canines, 8 molars — no premolars).
4Which Angle classification describes a normal molar relationship in which the mesiobuccal cusp of the maxillary first molar occludes with the mesiobuccal groove of the mandibular first molar?
A.Class I
B.Class II Division 1
C.Class II Division 2
D.Class III
Explanation: Angle Class I (normal occlusion) is defined by the mesiobuccal cusp of the maxillary first molar aligning with the mesiobuccal groove of the mandibular first molar. Crowding or rotation may exist, but the molar relationship is neutral.
5Which structure forms the connective-tissue attachment between the cementum of the root and the alveolar bone?
A.Gingiva
B.Periodontal ligament
C.Pulp
D.Mucogingival junction
Explanation: The periodontal ligament (PDL) is a fibrous connective tissue that suspends the root in the alveolar socket. It anchors cementum to alveolar bone, absorbs occlusal forces, and contains proprioceptive nerve endings.
6How many cusps does a typical maxillary first molar have, and what is the name of the supplemental fifth cusp when present?
A.Three cusps; cusp of Carabelli
B.Four cusps; cusp of Carabelli
C.Five cusps; mesiolingual cusp
D.Six cusps; distobuccal cusp
Explanation: A typical maxillary first molar has four major cusps (mesiobuccal, distobuccal, mesiolingual, distolingual). When present, the supplemental fifth cusp located on the mesiolingual cusp is called the cusp of Carabelli.
7Which anterior tooth has a single cusp tip, the longest root in the dental arch, and is sometimes called the 'cornerstone' of the arch?
A.Central incisor
B.Lateral incisor
C.Canine
D.First premolar
Explanation: The canine (cuspid) has a single pointed cusp tip and the longest root of any tooth in the arch. Because it sits at the corner of the arch and bears heavy occlusal forces during canine guidance, it is called the cornerstone of the dental arch.
8What is the term for the horizontal overlap of the maxillary incisors over the mandibular incisors when the teeth are in maximum intercuspation?
A.Overbite
B.Overjet
C.Crossbite
D.Open bite
Explanation: Overjet is the horizontal distance between the labial surfaces of the maxillary and mandibular incisors when the teeth are in maximum intercuspation. Normal overjet is approximately 2-3 mm.
9Which surface of a posterior tooth is the chewing surface that contacts the opposing arch?
A.Lingual
B.Buccal
C.Occlusal
D.Mesial
Explanation: The occlusal surface is the chewing (biting) surface of posterior teeth (premolars and molars) that contacts the opposing arch during mastication. Anterior teeth use the incisal edge instead.
10In the FDI (ISO) two-digit tooth numbering system, what does tooth number 36 designate?
A.Maxillary right first molar
B.Maxillary left first molar
C.Mandibular left first molar
D.Mandibular right first molar
Explanation: In the FDI system, the first digit identifies the quadrant (1=maxillary right, 2=maxillary left, 3=mandibular left, 4=mandibular right) and the second digit identifies the tooth from midline (1=central incisor through 8=third molar). Tooth 36 is the mandibular left first molar.

About the DANB CRFDA Exam

The DANB Certified Restorative Functions Dental Assistant (CRFDA) credential validates expanded-function competence in placing direct restorations under dentist supervision. Our 100-question practice bank covers anatomy and morphology, isolation, temporaries, impressions, and restoration placement.

Exam sponsor: DANB / Pearson VUE. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Questions

230 questions

Time Limit

3 hours

Passing Score

Scaled score 400 per component

Exam / Certification Fees

$700

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

20 questions (~20%)

Anatomy, Morphology, and Physiology (AMP)

Head and neck anatomy, dental anatomy and morphology, periodontium, occlusion, Universal and FDI tooth numbering.

15 questions (~15%)

Isolation (IS)

Rubber dam clamps, frames, inversion technique, latex/nitrile materials, cotton-roll isolation, Isolite/DryShield, and HVE technique.

20 questions (~20%)

Temporaries (TMP)

Preformed and custom provisionals, indirect/direct fabrication, eugenol vs. non-eugenol cementation, occlusion adjustment, polishing.

20 questions (~20%)

Impressions (IM)

Alginate, PVS, polyether, retraction cord technique, bite registration, facebow, intraoral scanners (iTero, TRIOS, Primescan, CEREC).

25 questions (~25%)

Restoration (RF)

Direct composite (etch-and-rinse, bonding generations, incremental placement, light curing), amalgam (mercury hygiene, carving, polishing), GIC/RMGI, matrices and wedges.

Preparing for the DANB CRFDA Exam

What You Need to Know

  • Passing score: Scaled score 400 per component
  • Exam length: 230 questions
  • Time limit: 3 hours
  • Exam / certification fees: $700 Official sources

Using Our Practice Resources

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

DANB CRFDA: Suggested Study Strategy

1Prioritize Restoration (RF) — the largest section, with composite layering, etch-and-rinse vs. self-etch bonding, sectional matrices, and amalgam carving
2Master rubber dam isolation — clamp selection (winged vs. wingless, anterior #212 vs. posterior W8A/W14A/W56), inversion with floss, and latex/nitrile material choice
3For Impressions, practice differentiating alginate vs. PVS vs. polyether properties and indications, plus retraction cord technique and bite registration
4Memorize tooth numbering (Universal 1-32 and FDI two-digit), Angle classification, and the cusp anatomy of premolars and molars for the AMP component
5Practice provisional fabrication: indirect technique with pre-op matrix, eugenol vs. non-eugenol cement selection, and occlusal adjustment with articulating paper

Frequently Asked Questions

How many questions are on the DANB CRFDA exam?

DANB lists the combined CRFDA at 230 questions total: 80 Restorative Functions (RF), 50 Temporaries (TMP), 50 Impressions (IM), and 50 Sealants (SE).

How much does the DANB CRFDA exam cost?

The total cost for all four CRFDA component exams is $700: RF $275, TMP $125, IM $125, and SE $175. Components can be taken separately.

What are the eligibility requirements for the CRFDA?

The RF exam requires CDA certification, CODA-accredited program completion, or expanded functions coursework plus 3,500 hours of work experience. TMP, IM, and SE have no eligibility requirements.

Can I take CRFDA exams with remote proctoring?

Yes. DANB offers remote online proctoring for all CRFDA component exams (RF, TMP, IM, SE) in addition to in-person testing at Pearson VUE centers.

What is the CRFDA annual renewal cost?

CRFDA certification renewal costs $130 per year and requires continuing dental education credits and current CPR certification.