How to Become a Dental Assistant in California

What you can do from day one

An unlicensed dental assistant in California can perform basic supportive duties under a dentist's supervision from day one. Practices hire prepared beginners and train them in their own workflows.

The timing here matters, and it changed recently. Under Business and Professions Code section 1750, as amended effective January 1, 2025, your employer must make sure you complete a board-approved eight-hour infection control course before you perform any basic supportive procedure involving potential exposure to blood, saliva, or other potentially infectious material. That one is not a first-year item, it comes first. Within one year of being hired you then have to complete a board-approved two-hour California Dental Practice Act course and hold current basic life support certification. Your employer is also required to keep records showing you have met these requirements and to tell you what else your continued employment will require.

The X-ray rule in California

Taking X-rays in California requires passing a board-approved radiation safety course under Business and Professions Code section 1656. This applies to unlicensed assistants and licensed ones alike. The course is a substantial one, at least 32 hours, with didactic, laboratory, and clinical instruction. California does not issue a separate X-ray permit or license for this. You hold the course completion certificate, and it has to be posted where patients can see it. Many assistants complete the course while employed, and it is one of the fastest ways to make yourself more valuable to a practice.

Above the entry level, California licenses Registered Dental Assistants, and above that, Registered Dental Assistants in Extended Functions. The board also issues orthodontic assistant and dental sedation assistant permits. The RDA license has experience, coursework, and examination requirements. The most common route is 15 months and at least 1,280 hours of work experience, plus board-approved courses in radiation safety, coronal polishing, pit and fissure sealants, infection control, the California Dental Practice Act, and basic life support, then the Registered Dental Assistant Combined Written and Law and Ethics Examination. New application requirements and a new examination took effect July 1, 2025, so check the board's current RDA page rather than an older course provider's summary. The RDA is a goal for year one or two, not a requirement for getting hired.

One California-specific caution: the state's mandatory Infection Control and Dental Practice Act courses must come from a Dental Board of California Registered Provider. That approval is separate from national CE recognition like AGD PACE, and an OSHA or bloodborne pathogens course does not satisfy the mandatory Infection Control requirement. Before paying for any course meant to satisfy a California mandate, confirm the provider's Registered Provider status with the board.

The fastest realistic path

Step 1: Prepare seriously before applying. California interviews are competitive in desirable areas, and knowing the instruments, procedures, and patient moments sets you apart.

Step 2: Get hired as an unlicensed assistant and complete your first-year required courses on schedule.

Step 3: Add the radiation safety course early, then work toward the RDA license as your experience accumulates.

Common questions