Becoming a registered dental assistant (RDA) typically involves completing a dental assisting education program, passing one or more exams, and applying for registration through your state’s dental board. The entire process takes anywhere from nine months to two years depending on the program you choose and where you live. Because requirements are set at the state level, the specific steps vary, but the overall path follows a predictable sequence.
What an RDA Actually Does
The “registered” distinction matters. An unregistered dental assistant handles important but more limited tasks: greeting patients, scheduling appointments, taking X-rays (with the right coursework), applying fluoride, taking impressions, and removing sutures or rubber dams. An RDA can do all of that plus a range of clinical duties that require additional training and supervised hands-on skill.
Those expanded duties include constructing, cementing, and removing temporary crowns; performing mouth-mirror exams to identify previous dental work, missing teeth, and lesions; sizing orthodontic bands and crowns; collecting endodontic culture samples; applying and activating bleaching agents; and polishing crowns after completing a board-certified course. In short, RDAs work more independently chairside and take on tasks that directly affect the patient’s mouth, always under the supervision of a licensed dentist.
Some states offer an even higher tier. In California, for example, a Registered Dental Assistant in Extended Functions (RDAEF) can apply sealants, place etchants for bonding, and take impressions for more complex dental devices. That requires additional training beyond standard RDA certification.
Step 1: Meet the Basic Prerequisites
Most states require you to be at least 18 years old and hold a high school diploma or GED. A current CPR certification (typically Basic Life Support, or BLS) is also standard. Some states will let you begin a dental assisting program at 17, but you’ll need to meet the age requirement before you can sit for exams or apply for registration.
Because dental assisting regulations are determined entirely at the state level, always check your specific state dental board’s requirements before you start. The American Dental Assistants Association maintains a state-by-state directory that can point you in the right direction.
Step 2: Complete a Dental Assisting Program
Most aspiring RDAs enroll in a formal dental assisting program at a community college, vocational school, or career college. These programs range from nine-month certificate tracks to two-year associate degree programs. The curriculum covers dental anatomy, radiography, infection control, chairside assisting techniques, dental materials, and clinical rotations where you work with real patients under supervision.
Look for programs accredited by the Commission on Dental Accreditation (CODA). CODA-accredited programs meet nationally recognized educational standards, and graduating from one is often required (or at minimum preferred) to qualify for board exams and state registration. Some states accept on-the-job training as an alternative path, but a CODA-accredited program streamlines the process and makes you eligible for national certification without extra hurdles.
Step 3: Pass the Required Exams
The Dental Assisting National Board (DANB) administers the exams most states recognize or require. The flagship credential is the Certified Dental Assistant (CDA) certification, which consists of three component exams:
- Infection Control (ICE): Covers sterilization procedures, handling of hazardous materials, and protocols for preventing cross-contamination in the dental office.
- Radiation Health and Safety (RHS): Tests your knowledge of taking dental X-rays safely, including proper positioning, exposure settings, and radiation protection for patients and staff.
- General Chairside Assisting (GC): Covers the clinical knowledge you need to assist a dentist during procedures, from instrument handling to patient management.
You can take these exams individually or together. Many states specifically require the RHS and ICE exams even if they don’t mandate the full CDA. Check what your state dental board accepts. Some states administer their own registration exams in addition to, or instead of, DANB exams.
DANB also offers other credentials that may be relevant depending on your career focus. The Certified Orthodontic Assistant (COA) combines the ICE exam with an orthodontic assisting exam, and the National Entry Level Dental Assistant (NELDA) certification pairs ICE and RHS with an anatomy, morphology, and physiology exam for those just starting out.
Step 4: Apply for State Registration
Once you’ve completed your education and passed the required exams, you apply for registration through your state’s dental board. This typically involves submitting proof of your education, exam scores, CPR certification, and a background check. Some states also require a jurisprudence exam covering that state’s specific dental practice laws. Processing times vary, but most boards issue registration within a few weeks of receiving a complete application.
Keeping Your Registration Active
RDA registration isn’t a one-time achievement. You’ll need to renew it on a regular cycle, usually every two years. Renewal requires completing continuing education (CE) credits. The exact number depends on your state. New Jersey, for example, requires 10 credit hours every two years and allows up to half of those hours to be completed through online or distance learning. Other states set different thresholds. Your state board will specify which topics qualify, and many CE courses are available online, at dental conferences, or through local dental societies.
Letting your CE requirements lapse can mean losing your active registration, so it’s worth tracking your credits throughout the renewal cycle rather than scrambling at the end.
How Long the Process Takes
If you enroll in a certificate program, you can realistically go from your first day of class to holding your RDA registration in about 12 to 15 months, accounting for program completion, exam scheduling, and the application process. An associate degree path takes closer to two years but gives you a broader educational foundation and may improve your earning potential or open doors to roles in office management or dental hygiene programs later.
States that allow on-the-job training as a pathway typically require you to work a set number of hours (often 3,000 or more) under a licensed dentist before you’re eligible to take the registration exam. That route avoids tuition costs but extends the timeline and limits what you’re allowed to do while in training.
Salary and Job Outlook
The median annual wage for dental assistants in the United States was $47,300 as of May 2024, which works out to about $22.74 per hour. The lowest 10 percent earned under $36,190, while the highest 10 percent earned more than $61,780. The Bureau of Labor Statistics reports these figures for all dental assistants without separating registered from non-registered, but RDAs generally command higher pay because they’re qualified for a broader range of clinical tasks.
Your actual salary depends heavily on where you work, both geographically and by practice type. RDAs in oral surgery or orthodontic offices often earn more than those in general dentistry. Metropolitan areas and states with higher costs of living tend to offer higher wages as well.
Where RDAs Work
The vast majority of RDAs work in private dental practices, either general or specialty. Orthodontic offices, oral surgery centers, pediatric dental clinics, and periodontal practices all employ RDAs. Beyond private practice, you’ll find RDAs in community health centers, hospital dental departments, dental schools (assisting with teaching clinics), and public health organizations. Some RDAs eventually move into dental sales, office management, or use their experience as a stepping stone toward dental hygiene or other advanced dental careers.