DANB Certified Dental Assistant (CDA) Practice Test

140 questions available

Build your confidence for DANB Certified Dental Assistant (CDA). Practice the concepts, understand the answers, and strengthen your knowledge one question at a time.

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Certification exam
320 Exam questions
4 hours 30 minutes Time Limit
Your practice
140 Practice questions
2 hours 20 minutes Practice Time
Try 5 free questions
No account needed. A free account includes 20 questions for this exam.
The bar to clear Scaled score (passing threshold varies by exam; set by DANB standard setting process) Published passing score for this certification.
Explore exam topics Official objectives from DANB
DANB140 practice questions
Blueprint verifiedChecked against DANB official objectivesMetadata verified 2026-09-26How we verify

Exam overview and details

The DANB Certified Dental Assistant (CDA) certification is the nationally recognized standard of excellence for dental assisting professionals. Administered by the Dental Assisting National Board (DANB), this credential validates a comprehensive mastery of the clinical, technical, and administrative skills essential to modern dental practice. Earning the CDA demonstrates proven competency across eight critical domains: Infection Control, Radiography, General Chairside Assisting, Dental Materials, Patient and Operator Safety, Coronal Polishing, Sealant Application, and Dental Office Management. It is often a prerequisite for expanded functions and is recognized or required by many state dental boards and private practices. The certification signifies a commitment to patient safety, adherence to the highest standards of care, and dedication to professional growth. Holding the CDA credential distinguishes an assistant as a knowledgeable, skilled, and reliable member of the dental healthcare team, directly contributing to practice efficiency, regulatory compliance, and superior patient outcomes.

Sample Questions

Choose an answer and explore the explanation to see how practice works.

ICE - Occupational Safety and Administration Protocols

A sharps injury occurs when an assistant is cleaning a used scaler by hand. The assistant washes the puncture and says they do not want to report it because the patient seemed healthy. What is required next?

ICE - Process Instruments and Devices

A heat-sensitive intraoral camera sheath is torn after use, and the camera body has visible saliva at the seam. The manufacturer says the camera is not immersible. What is the best processing approach?

RHS - Infection Prevention and Control

After exposing images, the assistant removes gloves, then carries unprocessed contaminated receptor holders to sterilization with bare hands because they are dry. What is the infection-control problem?

RHS - Radiation Characteristics and Protection

An assistant discovers the exposure button sticks intermittently and one exposure continued longer than expected. The image was dark, and the patient asks whether to continue. What should the assistant do?

RHS - Purpose and Technique

A premolar bitewing shows open contacts on the right side but severe overlap on the left side of the same receptor. The receptor was seated correctly and the patient did not move. What is the most likely correction for the retake?

Career Opportunities & Salary

Median salary: $48,070– Dental Assistants

Source: BLS Occupational Employment and Wage Statistics, May 2025 -- Dental Assistants (SOC 31-9091), US national. Occupation median, not a certification salary. (2025)

Dental Assistants

Exam insights and study advice

Achieving the DANB CDA certification is a pivotal career milestone that signifies professional credibility and clinical competence. It is widely regarded by employers as a benchmark for hiring and promotion, often leading to increased earning potential and greater job security. The credential provides formal industry recognition, separating certified assistants from their non-certified peers and opening doors to advanced roles, specialized practice settings, and leadership opportunities. Furthermore, it fulfills or contributes to state regulatory requirements for performing specific duties, such as radiography or sealant application, thereby expanding your legal scope of practice. In an evolving healthcare landscape, the CDA certification validates your commitment to lifelong learning and adherence to nationally established standards, enhancing both your professional stature and the quality of care you provide.

These are the backgrounds the certifying body suggests. Check the vendor's own page for anything it formally requires.

What this exam covers

01General Chairside Assisting (GC component)

02Infection Control (ICE component)

03Radiation Health and Safety (RHS component)

Exam Details CDA | $330 USD | 4 hours 30 minutes

Exam Code CDA
Vendor DANB
Exam Cost $330 USD
Passing Score Scaled score (passing threshold varies by exam; set by DANB standard setting process)
Time Limit 4 hours 30 minutes
Exam questions 320
Question TypesMultiple Choice
Retake Policy 90-day waiting period between failed attempts. No stated limit on total attempts. Each retake requires a new exam registration fee.
Exam Format Linear (fixed-form, computer-based)

Frequently Asked Questions

What are the eligibility pathways to sit for the DANB CDA exam?

Is the CDA certification recognized by state dental boards?

How does the CDA exam renew my certification, and what are the Continuing Education (CE) requirements?

What is the structure of the CDA exam, and how is it scored?

What career advancements are typically available to a DANB-CDA certified assistant?