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About this exam

The Certified Dental Assistant (CDA) credential is awarded by the Dental Assisting National Board (DANB) to dental assistants who pass the CDA exam, which DANB describes as a milestone achievement in a dental assisting career. It is aimed at working and aspiring chairside assistants who want a nationally recognized credential that demonstrates commitment to the profession and supports both patient care and the dental team. The CDA exam draws on three content areas: General Chairside Assisting, Radiation Health and Safety, and Infection Control. DANB offers the Radiation Health and Safety (RHS) and Infection Control (ICE) exams as standalone tests that are also component exams of several DANB certifications, so candidates often sit these alongside the general chairside portion. Preparation is self-directed: DANB points candidates to the DALE Foundation's online practice tests and review courses, and to DANB study guides and exam-preparation pages, to build a study plan and check readiness before test day. Because eligibility pathways vary by state, candidates should review their state's requirements - job levels, exam and education pathways, and allowable duties - before applying. This page is an independent study resource and is not affiliated with or endorsed by DANB.

What you'll study

Common questions

About CDA preparation

What is the CDA exam and who is it for?

It is DANB's Certified Dental Assistant exam, described by DANB as a milestone achievement. It suits dental assistants who want a recognized credential showing career commitment and knowledge that supports patients and the dental team. Check DANB's eligibility and your state's requirements before applying, since pathways and allowable duties differ by state.

What does the CDA exam cover?

The exam is organized around three content areas: General Chairside Assisting, Radiation Health and Safety, and Infection Control. DANB offers the Radiation Health and Safety (RHS) and Infection Control (ICE) exams separately, and notes ICE is a component exam of several DANB certifications, so you may encounter these topics both within and outside the CDA exam.

How many questions are on the exam, and how long is it?

DANB publishes exam specifics on its own exam pages; the source material available for this page does not state a question count or time limit, so none are listed here. Confirm current figures directly with DANB or your test provider before you plan your pacing, and do not rely on secondhand numbers.

What does the exam cost, and what is the passing score?

Fees and passing scores are set by DANB and are not stated in the source material used for this page, so they are not quoted here. Because fees and policies are revised periodically, verify the current amount and the passing standard on DANB's site or by contacting DANB before you register.

How should I prepare and in what order should I study?

DANB recommends strengthening your study plan with its study guides and preparation resources, and points candidates to the DALE Foundation's online practice tests and review courses. A practical order is infection control first, since it underpins every procedure, then radiation health and safety, then general chairside assisting, finishing with practice tests to find gaps.

What are common reasons candidates struggle?

Typical weak spots are infection control details applied to realistic scenarios, radiation safety concepts rather than pure terminology, and chairside sequencing questions that require choosing the best next step. Candidates who only memorize lists tend to struggle; practicing applied, scenario-style questions and reviewing missed items usually closes the gap fastest.

Can I retake the exam if I do not pass?

Retake rules, waiting periods, and any associated costs are set by DANB and are not described in the source material for this page, so they are not stated here. Check DANB's forms and policies section or contact DANB directly for the current retake process before assuming a timeline.

How do I verify a DANB credential?

DANB provides a credential verification page where you can look up someone's DANB exam or certification status. Employers and candidates can use it to confirm that a credential is active; it is the appropriate route rather than relying on a certificate copy alone.

Where can I get help with applications or forms?

DANB lists a contact page, a forms and policies section, and support by phone and email. DANB states that representatives are available M-F, 8:00 a.m. to 4:30 p.m. CT, and lists a Chicago office address. Use these channels for application, eligibility, and policy questions.