Dental auxiliary scope & supervision
Who can do what, and under whose supervision. California recognizes eight auxiliary categories and exactly two supervision levels. Scope details for specific duties come from the Dental Board’s Table of Permitted Dental Auxiliary Duties (updated effective January 1, 2025).
The two supervision levels (BPC §1741)
Direct supervision
The dentist is physically present in the facility during the procedure and must check and approve the completed work before the patient is dismissed from the chair.
Business & Professions Code §1741
General supervision
The dentist need not be physically present, but must have authorized the procedure in advance through a written treatment plan.
Business & Professions Code §1741
There is no “indirect supervision” in California. Delegation never transfers the duty of care (BPC §1750.1) — the supervising dentist stays responsible.
The eight auxiliary categories
Dental Assistant (unlicensed)
Dental Board of CaliforniaMust complete a Board-approved 8-hour infection-control course (16 CCR §1070.6) before any exposure-prone duty. May perform coronal polishing after a Board-approved course, under direct supervision only (SB 1453).
Orthodontic Assistant
Dental Board of CaliforniaPermit category for orthodontic-specific duties.
Dental Sedation Assistant
Dental Board of CaliforniaPermit category for sedation-support duties.
Registered Dental Assistant
Dental Board of CaliforniaLicensed assistant; broader delegated duties per the Table of Permitted Duties.
RDA in Extended Functions
Dental Board of CaliforniaExtended-function duties. The former cap of three EF auxiliaries per dentist was repealed effective 1/1/2025 (SB 1453).
Registered Dental Hygienist
Dental Hygiene Board of CaliforniaMay administer local anesthesia only under the direct supervision of a physically present dentist.
RDH in Alternative Practice
Dental Hygiene Board of CaliforniaMay provide care in alternative settings under statutory conditions.
RDH in Extended Functions
Dental Hygiene Board of CaliforniaExtended-function hygiene duties.
Frequently asked questions
- What are the supervision levels for dental assistants in California?
- California recognizes exactly two levels under Business & Professions Code §1741. Direct supervision means the dentist is physically present in the facility and checks the completed work before the patient is dismissed. General supervision means the dentist authorized the procedure in advance through a written treatment plan and need not be present. There is no 'indirect supervision' in California.
- What changed for dental assistants under SB 1453?
- Effective January 1, 2025, SB 1453 requires a dental assistant to complete the Board-approved 8-hour infection-control course before any exposure-prone duty (the former one-year grace period was repealed), repealed the old cap of three extended-function auxiliaries per dentist, and allowed a DA to perform coronal polishing after a Board-approved course under direct supervision only.
- Can a registered dental hygienist administer local anesthesia in California?
- Yes, but only under the direct supervision of a physically present dentist. A hygienist administering local anesthesia while the dentist is off-site is a serious violation.