- ADEX is the ADEX Dental Hygiene Examination, run by the American Board of Dental Examiners, not another certification with the same acronym.
- The series has two parts: the computer-based CSCE OSCE and the typodont-based SPTCE.
- Both components require a minimum scaled score of 75, and must be passed within 18 months of your first attempt.
- The full series costs $1,150 plus facility fees, with one complimentary clinical retake built in.
What Is ADEX? An Overview
ADEX stands for the ADEX Dental Hygiene Examination, a credentialing exam series administered by the American Board of Dental Examiners. It's the pathway many dental hygiene graduates use to demonstrate clinical competency to state licensing boards. If you've searched "what is ADEX" while trying to figure out your licensure path, this is the exam this site is built around - not any other program that happens to share the same acronym.
For the 2026 cycle, ADEX consists of two distinct components that together assess whether a candidate can safely and competently perform the core duties of a licensed dental hygienist. Passing both is generally what state boards look for before granting a license, though every jurisdiction sets its own application timelines on top of the ADEX result itself.
If this is your first time encountering the acronym, our companion pieces on ADEX Meaning and What Does ADEX Stand For? go deeper into the terminology, while this article focuses on what the exam actually contains and how it's structured.
The Two Parts of the ADEX Series
ADEX isn't a single sitting. It's a series made up of two separate examinations, each testing a different kind of competency.
CSCE OSCE (Computer-Based Component)
The CSCE OSCE is delivered at Prometric test centers and presents up to 120 items, with the exact count varying slightly by test form because a small number of unscored pilot items are mixed in. Candidates get 115 minutes to work through the exam, plus a separate 15-minute tutorial before the clock starts on scored content.
What makes this section distinct from a typical multiple-choice licensing test is its variety of item formats. You'll encounter:
- Selected-response and multiple-response questions
- Extended match items
- Drop-down selections
- Fill-in-the-blank responses
- Hot spot identification
- Drag-and-drop items
Because the format shifts throughout the exam, candidates who only practice with basic multiple-choice questions are often caught off guard. A minimum scaled score of 75 is required to pass this component.
SPTCE (Simulated Patient Treatment Clinical Examination)
The SPTCE is the hands-on half of the series. It's performed on a typodont rather than a live patient, and candidates have up to two hours to complete the required tasks. This component evaluates:
- Calculus detection
- Calculus removal
- Periodontal probing measurements
- Treatment management
Work is assessed on both maxillary and mandibular typodonts, and like the CSCE OSCE, the SPTCE also requires a minimum score of 75 to pass. For a full breakdown of how scoring works across both components, see our guide to the ADEX Passing Score.
Key Takeaway
Treat the CSCE OSCE and SPTCE as two separate exams requiring two separate preparation plans - one is knowledge-and-format heavy, the other is manual-skill heavy.
What ADEX Actually Tests: The Six Domains
The CSCE OSCE content is organized into six domains for the 2026-2027 cycle, each carrying a specific weight in the overall exam. Understanding these weights is the single most useful thing you can do before building a study plan, because it tells you exactly where the exam concentrates its questions.
Domain 1: Medical/Dental Assessment (12%)
Covers gathering and interpreting a patient's medical and dental history to inform safe treatment decisions.
- Recognizing contraindications and risk factors before treatment
Domain 2: Intra and Extra Oral Assessment and Charting (27%)
The single largest domain on the exam, covering clinical examination, tissue assessment, and accurate charting of findings.
- This domain alone accounts for over a quarter of scored items - prioritize it heavily
Domain 3: Radiology/Imaging (15%)
Tests interpretation and application of dental imaging in diagnosis and care.
- Expect items on image interpretation, not just capture technique
Domain 4: Dental Hygiene Care Planning (13%)
Focuses on developing appropriate, sequenced treatment plans based on assessment findings.
- Connects directly to Domain 2 findings, so study them together
Domain 5: Patient Care (19%)
The second-largest domain, covering direct clinical care delivery and patient management during treatment.
- Overlaps heavily with skills tested hands-on in the SPTCE
Domain 6: Dental Specialties and Pharmacology (14%)
Covers how other dental specialties and medications intersect with hygiene practice.
- Drug interactions and specialty referrals are common item topics
| Domain | Weight |
|---|---|
| Intra and Extra Oral Assessment and Charting | 27% |
| Patient Care | 19% |
| Radiology/Imaging | 15% |
| Dental Specialties and Pharmacology | 14% |
| Dental Hygiene Care Planning | 13% |
| Medical/Dental Assessment | 12% |
For a domain-by-domain deep dive with example content and study strategies for each, read the ADEX Exam Domains 2026: Complete Guide to All 6 Content Areas.
Registration, Fees, and Retake Rules
Understanding ADEX's fee structure matters because mistakes here are expensive to fix. The full series costs $1,150 plus the clinical-site facility fee charged by whichever testing site hosts your SPTCE.
That base fee includes one complimentary retake of your initial clinical examination if you don't pass on the first attempt - though you'll still owe the $150 typodont fee and the facility fee for that retake sitting. If you need a third clinical attempt, it costs $795 plus the facility fee. A second or third CSCE OSCE retake runs $275.
Other rules to keep in mind:
- A minimum 10-day wait is required after a failed attempt before retesting
- Both the CSCE OSCE and SPTCE must be passed within 18 months of your first attempt at either one
- Three successive failures of the same component means restarting and repaying for the entire series
- ADEX results themselves do not expire, though the licensing board you apply to may impose its own application deadlines
For the complete cost breakdown across every scenario, see the ADEX Certification Cost 2026: Complete Pricing Breakdown. If you're mapping out when to sit for each component, the ADEX Exam Dates 2026 guide covers testing windows and scheduling deadlines in detail.
Who Can Sit for ADEX
Eligibility for ADEX is generally tied to your educational background. Applicants must typically be graduates or final-semester students of a CODA-accredited program in the U.S. or a CDAC-accredited program in Canada. Candidates outside that pool need specific authorization from the licensing jurisdiction where they intend to become licensed.
Because eligibility rules can interact differently with different state boards, it's worth reviewing the full requirements before you register. Our dedicated breakdown at ADEX Requirements 2026: Eligibility, Prerequisites & How to Qualify walks through documentation and program-verification steps in more depth.
Who Looks for ADEX Results
Passing ADEX is primarily a licensure step, not a standalone job qualification - but it's a step nearly every practicing dental hygienist in participating jurisdictions has to clear before a dental practice, periodontal office, community health clinic, or public health program can legally hire them into a hygienist role. Employers reviewing applications typically want to see that licensure step completed, since it confirms the clinical competencies covered across all six domains have been independently verified.
If you're weighing how ADEX results translate into job prospects and compensation, the ADEX Salary Guide 2026: Complete Earnings Analysis and ADEX Jobs resources are useful next reads. For a broader cost-versus-benefit view, Is the ADEX Certification Worth It? Complete ROI Analysis 2026 weighs the licensure investment against career outcomes.
Scheduling Your Prep Around ADEX
Because Domain 2 (Intra and Extra Oral Assessment and Charting) carries the heaviest weight at 27%, and Domain 5 (Patient Care) is second at 19%, your study calendar should give these two domains the most repeated exposure - not equal time across all six. A simple way to structure the weeks leading into your CSCE OSCE date is to front-load the high-weight domains early, then rotate through the smaller domains, and finish with mixed-format practice sessions that mimic the exam's blend of drag-and-drop, hot spot, and extended-match items.
Domain 2 + Domain 5 Foundations
- Review charting conventions and clinical assessment sequencing
- Practice patient care scenario items in mixed formats
Domain 3, 4, and 6
- Work through radiology interpretation items
- Connect care planning questions back to Domain 2 findings
- Review pharmacology and specialty referral scenarios
Domain 1 + Full-Length Mixed Practice
- Cover medical/dental assessment content
- Run full 115-minute timed practice sets across all item formats
SPTCE Skill Drills
- Rehearse calculus detection and removal on a typodont
- Time periodontal probing and treatment management tasks against the two-hour limit
For a more detailed week-by-week plan with specific practice targets, see the ADEX Study Guide 2026: How to Pass on Your First Attempt. And if you're still assessing how demanding the exam is relative to your current preparation level, How Hard Is the ADEX Exam? Complete Difficulty Guide 2026 and ADEX Pass Rate 2026: What the Data Shows provide useful context.
Frequently Asked Questions
ADEX is the ADEX Dental Hygiene Examination administered by the American Board of Dental Examiners. It's a two-part series - the CSCE OSCE and the SPTCE - used by many state boards as a licensure requirement for dental hygienists.
The full series costs $1,150 plus the clinical-site facility fee. This includes one complimentary retake of the initial clinical exam, though you still pay the $150 typodont fee and facility fee for that retake.
Both the CSCE OSCE and the SPTCE require a minimum scaled score of 75 to pass.
Both components must be passed within 18 months of your first attempt at either one. There's also a minimum 10-day wait required after any failed attempt before retesting.
ADEX examination results themselves do not expire, but individual licensing boards can impose their own application timelines, so check with the jurisdiction where you plan to apply.