Exam family
Dental assisting
Dental assisting certification and licensure exams — the national DANB credentials and state RDA licenses.
2 published exams, administered by Dental Assisting National Board (DANB) and Dental Board of California. The official exam is 245 questions. Time limit: 3h 15m. 122 free practice questions are live across the family. State-specific versions: CA.
2 exams
Exams in Dental assisting
Most searched first.
- DANB CDADental Assisting National Board (DANB)
DANB Certified Dental Assistant (CDA) Exam
Questions245Time limit3h 15mExam fee$450 - California RDADental Board of California · CA
California Registered Dental Assistant (RDA) Written Exam
Exam fee$46.59
DANB CDA or California RDA: national certification versus a state licence
Dental assisting is regulated state by state, and the two exams here show the two models. The Certified Dental Assistant from DANB is a national certification made of component exams — general chairside, radiation health and safety, infection control — that most states recognise for expanded functions or for radiography, and that employers list as the standard credential. California's Registered Dental Assistant is a state licence issued by the Dental Board of California after a combined written and law-and-ethics examination, with its own eligibility route through approved education or work experience.
Which one you need depends on the state. In many states DANB components satisfy a specific requirement — radiography is the common one — while the licence itself, if the state has one, comes from the board. In California the RDA licence is the credential, and DANB certification is separate. The exam pages give the eligibility routes and the outlines for each.
The two exams test differently as well. DANB's components are each their own exam with their own outline — chairside procedures, radiography safety and technique, infection-control standards — and candidates may take them separately or together. California's combined written exam pairs clinical knowledge with a law-and-ethics section on the Dental Practice Act, the Board's regulations and the duties an RDA may and may not perform, and the Board publishes the outline for both parts.
How to use this family page: start from your state board's requirement, open the exam guide for the eligibility pathway and outline, and work the practice sets by component for DANB or by section for California's combined exam. Radiography is the component most states require first, so it is the usual starting point.
Which exam is yours
Each page shows the question count, time limit, fee and passing standard from DANB or the Dental Board of California.
DANB's CDA: component exams that most states recognise for expanded functions and radiography.
The Dental Board's RDA licence: combined written and law-and-ethics exam after approved education or qualifying experience.
DANB's radiation health and safety component is the usual route; the exam page explains the component structure.
DANB accepts accredited-program graduation or work experience pathways; California accepts approved programs or documented experience.
DANB certification renews with continuing education; the California licence renews with the Board's continuing-education and fee requirements.
State first, then credential
- 01Start from the functions you will perform, because that is what the state board licenses — a state may allow an unlicensed assistant to take X-rays only after a specific DANB component, and California licenses the role itself.
- 02For DANB, choose the components your state recognises and meet the eligibility pathway; for California, apply to the Board and sit the combined exam.
- 03Renew with continuing education on the body's or Board's cycle.
Fee, format and passing standard
All 2 exams on this page. Each figure is that exam's verified fact, cited to the regulator's page on the exam guide it links to. A blank cell means the regulator publishes no fixed figure.
| Exam | Fee | Questions | Time | Passing | Written by |
|---|---|---|---|---|---|
| DANB CDA | $450 | 245 | 3h 15m | — | Dental Assisting National Board (DANB) |
| California RDA | $46.59 | — | — | — | Dental Board of California |
Who writes these exams
- State dental boards
- License or register dental assistants and decide which DANB components satisfy which functions.
- DANB
- Owns the CDA and its component exams, sets eligibility pathways and renewal.
Official pages this section is drawn from
- Dental Assisting National Board · DANB CDA Exam
- Dental Assisting National Board · DANB RHS Exam
- Dental Board of California · Registered Dental Assistant Applicants
- Dental Board of California · RDA Combined Written and Law and Ethics Examination Outline
Grounding
Official sources
Every exam number on this page traces to a document published by the body that sets or administers the exam. These are the primary publishers cited across Dental assisting.
- Dental Board of Californiadbc.ca.govcited by 1 exam
- Dental Assisting National Board (DANB)danb.orgcited by 1 exam
Last verified against these documents: