Expanded Function Dental Assistant Certification

The Expanded Function Dental Assistant Certification is a free beginner-level, 15-minute skill test from Science of Apps. It tests the knowledge of an expanded function dental assistant (EFDA) — preventive functions such as coronal polishing, sealants and fluoride, restorative functions such as rubber dam, matrices and placing amalgam and composite, and impressions, temporaries, infection control and safety — written to DANB expanded-function exam content, CDC dental infection prevention guidance and ADA clinical guidance for 2026. Which duties an assistant may perform is set by each state or country's dental board. Score 70% or more on its 15 questions to earn a verifiable Expanded Function Dental Assistant Proficiency certificate (SOA-EFDA). Every question is based on published standards and research — including Certified Dental Assistant (CDA) exam: GC, RHS and ICE (Dental Assisting National Board), Dental sealants (oral health topics) (American Dental Association), Infection prevention and control in dental settings (CDC) — and each answer is explained with its source.

Science of Apps offers a free Expanded Function Dental Assistant Certification, updated for 2026 and 2027. It measures preventive functions, restorative functions and impressions, temporaries and safety and gives instant results with a shareable certificate.

Read the three skill areas on this page, then take the 15-minute test online — no fee, course or sign-up. You see every answer explained when you finish. Score 70% or more and you get a Expanded Function Dental Assistant Proficiency certificate straight away, on screen, as a PDF and by email, with a credential ID anyone can verify.

Yes. The questions are original scenarios written by Science of Apps, and each one is based on a public source you can read: Certified Dental Assistant (CDA) exam: GC, RHS and ICE (Dental Assisting National Board); Dental sealants (oral health topics) (American Dental Association); Infection prevention and control in dental settings (CDC); Dental effluent guidelines (amalgam separators) (US Environmental Protection Agency). The source is shown under each question and linked in the answer review. Science of Apps doesn't copy questions from other tests.

Three skill areas with five questions each, drawn from a bank of 10 per area so a retake brings new questions: Preventive Functions (Coronal polishing, Sealants and Fluoride); Restorative Functions (Isolation and matrices, Restorations and Cavity classification); Impressions, Temporaries and Safety (Impressions, Temporary restorations and Infection control and safety). Every question is an original scenario written to the 2026–2027 standard, with the published source named under it.

Expanded function dental assistant, Registered or certified dental assistant, Restorative dental assistant, Dental assisting student and Dental practice clinical lead. It suits anyone who wants a quick, verifiable way to show Expanded Function Dental Assistant knowledge in 2026 and 2027, from students and career switchers to experienced professionals.

It depends on the dental board where they work. Common expanded functions include coronal polishing, placing sealants and fluoride, placing and removing rubber dams and matrices, placing and finishing amalgam or composite restorations, taking final impressions and placing temporary restorations, always under a dentist's supervision.

Most US states require an accredited expanded-function course with clinical competency checks, plus a written and sometimes clinical exam — often a DANB exam or a state exam. Some states also require DANB CDA certification or a set amount of chairside experience first.

Yes. The test is online, in English and free everywhere — people take it from India, the US, the UK, Europe, Africa, Latin America and Asia-Pacific. Your certificate is dated with your own local date and can be verified from anywhere at scienceofapps.com/certification/verify/.

15 questions — 5 from each of 3 skill areas — with a 15-minute limit. You need 70% (11 of 15) to pass and 90% for distinction.

We rate it Beginner: no experience needed: fundamentals and clear reasoning. It has 15 scenario questions — 5 from each of 3 skill areas — and a 15-minute limit. You need 70% (11 of 15) to pass and 90% for distinction.

Nothing. There is no fee to take a test, to receive the certificate, to have it emailed or to verify it, and no sign-up.

On our server, not in your browser. The answers never reach the page until you submit, so a certificate can only be earned by passing. Each certificate gets a unique credential ID stored by Science of Apps.

You see your score for each area and every question with the correct answer and why, with the published source behind it. You can retake after 30 minutes, and the retake draws questions you haven't seen yet.

No. Every certificate is dated, so it always shows when you passed. Retake a test any time for a newer date or a higher score.

Yes. After you pass, Add to LinkedIn opens the Licenses & certifications form with the certificate name, Science of Apps as the issuer, the issue date, your credential ID and the verification link filled in. You can also download it as a PDF or PNG, and it's emailed to you as a PDF.

Every certificate has a credential ID and a QR code. Scanning it, or entering the ID at scienceofapps.com/certification/verify/, shows the holder's name, the certification, the score and the issue date from our records.

No. They are Science of Apps' own assessments of applied skill. They aren't issued by a university or standards body, and they work best alongside a portfolio that shows the skills in real work.