Hiring an Expanded Functions Dental Assistant (EFDA)

The short answer is restorative placement.

In Pennsylvania, an EFDA may place and condense amalgam restorations, carve and contour amalgam, place and finish composite resin restorations and sealants, perform coronal polishing and fluoride treatments, and place rubber dams, matrices, wedges, liners and bases (49 Pennsylvania Code 33.205a(a)).

Ohio reaches the same place in different words: expanded function dental auxiliary practice includes placing amalgam and nonmetallic restorative materials, including direct-bonded materials, plus sealants, topical fluoride and fluoride varnish (Ohio Revised Code 4715.64(A)).

California's rule reaches beyond restorative placement.

An RDAEF licensed on or after January 1, 2010 may, under direct supervision, place, contour, finish and adjust all direct restorations, take final impressions for permanent indirect restorations, and perform post, core and build-up procedures (Business and Professions Code 1753.5(b)).

The line underneath is explicit in the same state: an unlicensed dental assistant may not place or remove permanent restorations (Business and Professions Code 1750.1(d)).

The expansion has hard limits.

A Pennsylvania EFDA may not examine, diagnose or treatment plan, cut hard or soft tissue, administer local anesthesia, sedation or nitrous oxide analgesia, or make the final occlusal approval (49 Pennsylvania Code 33.205a(b)).

Diagnosis and treatment planning appear nowhere in the three task lists verified for this guide — Pennsylvania's rule says so outright, and in Ohio and California the work runs under your direct supervision.

Those decisions stay with you.

For the assistant's side of the credential — how someone chooses the path and qualifies — read the career guide on what an EFDA is.

The three states verified for this guide each write their own credential, and they do not even share a name:

The names are the tip of it — the education routes differ too (Ohio names a competency exam, California a written exam; Pennsylvania's listed route runs through a program), and nothing in this guide's sources connects one state's credential to another's.

When a candidate arrives credentialed elsewhere, confirm with your state dental board what carries over before you put restorative patients on the schedule.

Do not infer a credential from a job title, either: expanded-functions language on a résumé is not the credential itself.

Confirm what the person actually holds, in the state where they will work.

For the base-level assistant credentials, see certified or permitted assistants by state.

Restorative delegation runs on your license and your presence.

In Pennsylvania, every EFDA service must be performed under the direct supervision of a dentist (49 Pennsylvania Code 33.205a(a)(2)).

Direct supervision there means the dentist is in the office, personally diagnoses and authorizes the procedure, stays in the office while it is performed, and personally evaluates the EFDA's work before the patient is dismissed (49 Pennsylvania Code 33.205a(c)).

Ohio also ties the restorative assignments to direct supervision (Ohio Administrative Code 4715-11-04) and adds a presence rule of its own: an EFDA generally may not practice as an EFDA when the supervising dentist is not physically present at the location, except for sealants and listed preventive services (Ohio Revised Code 4715.64(C) to (E)).

Ohio is also the one state in this guide with a span-of-control cap: no more than two expanded function dental auxiliaries may practice as EFDAs under the same dentist at a time (Ohio Revised Code 4715.64(B)).

California conditions the RDAEF placement tasks on direct supervision as well (Business and Professions Code 1753.5(b)).

Two scheduling consequences follow.

An EFDA is not dentist-absent restorative coverage — build the days you are out of the office around hygiene and preventive visits, not around restorative dentistry.

And the only ratio cap in this guide's verified rules is Ohio's two.

Do not assume your state matches it, and do not assume it has none: ask the board before you staff around a number.

Ask for the credential itself, then confirm it with the state board that issued it, because what you are holding differs by state.

Pennsylvania certifies EFDAs; among the listed routes to certification is a Board-approved EFDA program of at least 200 hours of clinical and didactic instruction from an accredited dental assisting program (49 Pennsylvania Code 33.102(c)).

Ohio registers expanded function dental auxiliaries, and the application requires a $25 fee, board-specified education at an accredited institution, a passed competency exam and current BLS certification from the American Red Cross, American Heart Association or American Safety and Health Institute (Ohio Revised Code 4715.62(A)).

California licenses RDAEFs on top of a current RDA license (Business and Professions Code 1753(a)).

Three checks before you schedule restorative patients on the credential.

Is it current?

Is it the restorative credential for your state rather than a differently named basic certificate?

And is the required BLS in date — Ohio and California both condition the credential on current BLS?

In California the recordkeeping is also yours: the employer must maintain evidence, for the length of employment, that the dental assistant has met and maintained all certification requirements (Business and Professions Code 1750(d)).

File the credential and any course completions on day one and re-check at each renewal — treat a lapsed permit as no permit and confirm its status with the board.

Only one dollar figure is verified for this guide: Ohio's $25 EFDA registration application fee (Ohio Revised Code 4715.62(A)).

The real cost is the program.

Pennsylvania's certificate route runs through a Board-approved EFDA program of at least 200 hours of clinical and didactic instruction (49 Pennsylvania Code 33.102(c)); California stacks a board-approved extended functions program, a pit and fissure sealant course, a written exam and fingerprints on top of the RDA license (Business and Professions Code 1753(a)).

No tuition figure is verified in this guide's sources, so ask the programs your state approves for current figures.

The credential also costs maintenance.

Pennsylvania EFDAs complete 10 hours of continuing education per biennial period (49 Pennsylvania Code 33.401(a)(3)); in California, RDAEFs are among the licensees that need 25 CE units per biennial renewal period (16 California Code of Regulations 1017(c)).

Then decide who pays, before you promise tuition.

Under the FLSA, time in training need not be counted as hours worked only if all four conditions are met: outside regular hours, truly voluntary, not directly related to the job, and no productive work (29 CFR 785.27).

Attendance is not voluntary if the employer requires it (29 CFR 785.28), and training is directly related when it is designed to help the employee handle the current job more effectively rather than train for a new skill (29 CFR 785.29).

A program you make a condition of employment is not voluntary time, so plan for the study hours as hours worked.

If you fund the program and want the money back when an assistant leaves, two limits matter.

FLSA wages must be paid free and clear, and a repayment that cuts into the minimum wage or overtime owed for a workweek violates the Act (29 CFR 531.35).

And California bars, for contracts entered into on or after January 1, 2027, requiring a worker to repay a debt or pay a penalty if employment ends, with narrow exceptions (Business and Professions Code 16608).

Have employment counsel review any training repayment agreement before you use one.

What an EFDA commands over a base assistant is not established by this guide's sources — set pay against your assistant band and your local market.

Start from what to pay a dental assistant.

If you already employ a strong assistant, growing your own EFDA can beat recruiting a credentialed one from outside — if your state's route and your bench make it realistic.

The route is the state's to set.

In Pennsylvania, among the listed certification routes is a Board-approved EFDA certificate program of at least 200 hours of clinical and didactic instruction from an accredited dental assisting program (49 Pennsylvania Code 33.102(c)).

In Ohio, registration takes board-specified education at an accredited institution, a passed competency exam, current BLS and the $25 application fee (Ohio Revised Code 4715.62(A)).

California starts the ladder earlier: RDAEF licensure requires a current, active RDA license first, then a board-approved extended functions program, current BLS, a pit and fissure sealant course, fingerprints and a written exam (Business and Professions Code 1753(a)).

An assistant who is not yet an RDA has two rungs to climb, so start that conversation sooner.

Work the sequence like this: confirm the exact route and eligibility with your state board before you promise anything; choose the assistant whose restorative assisting is already strongest; get the BLS in date; schedule the program; and keep the completion evidence in the employee file — in California, that retention is an employer duty for the length of employment (Business and Professions Code 1750(d)).

Until the credential is issued, keep the assistant on basic duties: the restorative tasks belong to the credentialed role.

If you are hiring the credential from outside instead, start from hiring a dental assistant, and work the rest of the process — screening, offers, onboarding — from the dental hiring hub.