- What This Cheat Sheet Covers (and What It Doesn't)
- Exam Format Snapshot
- The Ten Domains and Their Weights
- Eligibility and Application Mechanics
- Fee Schedule at a Glance
- High-Yield Topics by Domain
- Scoring, Results, and Exam-Day Rules
- Maintaining the Credential
- Where ABDSM Sources Disagree
- Sequencing Your Review Around the Weights
- Frequently Asked Questions
- The exam is 150 multiple-choice questions in three hours, proctored by Kryterion, offered twice yearly.
- Domains 1, 2, 4 and 10 each carry the largest published weight: 13%.
- Applicants must finish an AADSM Mastery Program; ABDSM requires no case submissions.
- New applicants pay USD 995; eligible standard retakes cost USD 395.
What This Cheat Sheet Covers (and What It Doesn't)
This page condenses the facts for the Diplomate of the American Board of Dental Sleep Medicine (D. ABDSM), the credential issued by the American Board of Dental Sleep Medicine to dentists in the United States and Canada. It is a dentist-focused designation built around oral appliance therapy and the dental management of sleep-disordered breathing (SDB). If you are still orienting yourself, start with What Is D. ABDSM? or What Does D. ABDSM Stand For? before returning here.
Everything below is drawn from ABDSM's published materials: the 2024 Test Blueprint, the Certification Program Guidelines and Policies effective August 5, 2026, and the supporting web pages. Where those sources disagree, this sheet says so explicitly. Details can change, so always confirm against the current documents at abdsm.org before you apply or pay.
Exam Format Snapshot
| Item | What to Know |
|---|---|
| Question count | 150 multiple-choice questions |
| Time allowed | Three hours |
| Delivery | Proctored computer exam through Kryterion, at a test center or remotely |
| Frequency | Offered twice yearly |
| Case submissions | None required by ABDSM |
| Retakes | Up to two permitted during your eligibility period |
| Results | Pass/fail notification about six weeks after the testing window |
Three hours for 150 questions works out to roughly 72 seconds per item. That is comfortable for recall questions but tight for long clinical vignettes, so practice reading stems efficiently. For specific windows and registration deadlines, see D. ABDSM Exam Dates 2026.
The Ten Domains and Their Weights
The domain list below reproduces the objectives in the ABDSM 2024 Test Blueprint. Weights describe a typical examination, are approximate, and may vary from one administration to the next. For a deeper walkthrough of each area, read D. ABDSM Exam Domains 2026: Complete Guide to All 10 Content Areas.
| Domain | Focus | Weight |
|---|---|---|
| 1 | Physiology of sleep, pathophysiology of sleep disorders, and the mechanisms, comorbidities and medical consequences of SDB | 13% |
| 2 | Sleep testing to assist in managing patients diagnosed with SDB | 13% |
| 3 | Evidence-based alternatives for treating SDB and other common comorbid sleep disorders | 9% |
| 4 | Dental sleep medicine history, examination and imaging; candidacy, treatment planning, goals, expectations and informed consent | 13% |
| 5 | Selecting oral appliances; impression and fitting techniques | 12% |
| 6 | Calibrating the oral appliance to the therapeutic position and assessing effectiveness | 8% |
| 7 | Long-term management and follow-up of oral appliance therapy patients | 5% |
| 8 | Breathing disorders of sleep in children and adolescents; diagnostic and treatment options | 8% |
| 9 | Medical vs. dental model and guidelines of practice | 6% |
| 10 | Anticipating and managing side effects of OAT with proper use of informed consent | 13% |
Eligibility and Application Mechanics
Eligibility is spelled out in the 2026 guidelines. A full breakdown lives in D. ABDSM Requirements 2026; the essentials are:
- Residency: US or Canadian permanent residency.
- Degree: DDS, DMD, or an equivalent dental degree.
- Licensure: an active, unrestricted US (including territories) or Canadian dental license, or a permitted restricted faculty license with full-time employment at an accredited US or Canadian dental school.
- Education: completion of the AADSM Mastery Program or an AADSM-accredited Mastery Program.
- Eligibility window: initial eligibility lasts three years after Mastery completion.
- No cases: ABDSM does not require case submissions.
If your eligibility lapses, reestablishing it requires either repeating the entire Mastery Program or earning 65 additional qualifying CE hours from the preceding three years that have not previously been submitted. That is a strong incentive to schedule your attempt (and any retakes) well inside the window.
Fee Schedule at a Glance
| Category | Amount (USD) |
|---|---|
| New applicant, or reestablishing eligibility | 995 |
| Eligible standard retake | 395 |
| Qualifying full-time US/Canadian Federal Service dentists (including eligible retakes) | 250 |
The federal-service discount is described differently across ABDSM pages. The dated guidelines refer to full-time US/Canadian Federal Service dentists, while the application webpage describes it more narrowly as active-duty military. If you think you qualify, confirm your category with ABDSM before paying. The full cost picture, including preparation expenses outside the exam fee, is covered in D. ABDSM Certification Cost 2026.
High-Yield Topics by Domain
The blueprint objectives tell you what the exam tests; the points below translate them into concrete things to be able to do or explain. Use them as a self-quiz list.
Domain 1: Physiology and Pathophysiology of SDB (13%)
This is the medical foundation. Expect questions that connect mechanisms to consequences.
- Normal sleep architecture versus disrupted sleep
- How upper airway collapse occurs and why it matters clinically
- Comorbidities and medical consequences of untreated SDB
- Other common sleep disorders you must recognize and refer appropriately
Domain 2: Sleep Testing (13%)
Dentists do not diagnose SDB, but they must read and apply testing results to manage patients.
- Types of sleep tests and what each can and cannot show
- Interpreting reports to inform appliance candidacy and follow-up
- Using objective testing to assess treatment outcomes
Domain 4: History, Examination and Imaging (13%)
This domain links the clinical workup to treatment planning and consent.
- Components of a complete dental sleep medicine history
- Intraoral and extraoral examination findings that affect candidacy
- Appropriate imaging and what it contributes
- Setting treatment goals and expectations, and documenting informed consent
Domain 5 and 6: Appliance Selection and Calibration (12% and 8%)
Together these cover the hands-on core of oral appliance therapy.
- Matching appliance design and features to the clinical picture
- Impression and fitting techniques
- Finding the therapeutic position and assessing effectiveness
- Familiarity with device-characterization nomenclature, an official ABDSM preparation resource
Domain 10: Side Effects and Informed Consent (13%)
Often underestimated, this domain carries the same weight as Domains 1, 2 and 4.
- Anticipating common and less common side effects of oral appliance therapy
- Managing those side effects when they arise
- Using informed consent to set realistic expectations before treatment begins
Domains 3, 7, 8 and 9
Smaller weights, but easy points if you prepare.
- Domain 3 (9%): evidence-based alternatives to oral appliances for SDB and comorbid sleep disorders
- Domain 7 (5%): long-term follow-up and management in OAT
- Domain 8 (8%): pediatric and adolescent breathing disorders of sleep, including diagnostic and treatment options
- Domain 9 (6%): the medical versus dental model and guidelines of practice
Scoring, Results, and Exam-Day Rules
ABDSM determines passing using a psychometrically validated exam-difficulty analysis. Candidates receive a pass/fail outcome only. Actual scores and the passing threshold are not released, and the guidelines also withhold the numbers passing and failing. No official pass rate appeared in the sources reviewed for this article, so be skeptical of any site quoting one. Our pages on the passing score and the pass rate explain what is and is not publicly known.
- Timing: results arrive about six weeks after the testing window.
- Notification method: the dated guidelines specify the ABDSM certification portal, while the results webpage describes regular mail. Check your portal and your mailbox.
- Prohibited items: unauthorized notes, documents and electronic aids are not allowed, per the Examination Confidentiality and Applicant Conduct Policy.
Maintaining the Credential
Earning the designation is not the end of the obligations. Per the dated guidelines, maintenance includes:
- 25 qualifying CE hours every two years, with at least five in dental sleep medicine
- Up to 20 of those hours may be qualifying sleep-medicine CME credits
- USD 200 annual administrative fee; qualifying Federal Service dentists with verified active-duty status pay USD 50
- The annual fee is waived in the year certification is awarded
- Practice-management, billing and coding credit is capped at six hours, and lecturing/authorship credit is capped at six hours
Because of these recurring costs and requirements, it is worth thinking about long-term value before you commit. Our ROI analysis and earnings guide discuss how the designation fits into a practice, and D. ABDSM Jobs looks at where the credential tends to matter professionally.
Where ABDSM Sources Disagree
ABDSM's website and guidelines do not always align. When they conflict, defer to the dated guidelines (effective August 5, 2026) rather than undated web pages or older FAQs.
| Topic | Dated 2026 Guidelines | Other Page |
|---|---|---|
| Mastery Program timing | Complete before applying | Older FAQ: complete before the exam |
| Reduced-fee category | Full-time US/Canadian Federal Service dentists | Application page: active-duty military |
| Results notification | ABDSM certification portal | Results page: regular mail |
| Practice-management/billing/coding CE cap | Six hours | Maintenance page: five hours |
| Lecturing/authorship CE cap | Six hours | Maintenance page: 50% limit |
Key Takeaway
Treat the Certification Program Guidelines and Policies as your governing document. When a web page or FAQ contradicts it, email ABDSM to confirm rather than assuming, especially for fees and application timing.
Sequencing Your Review Around the Weights
Official preparation materials are the exam blueprint, the device-characterization nomenclature, and the required reading list. Note that the reading list does not cover every possible examination topic, and third-party study guides and practice questions are not official ABDSM materials. They can still help you rehearse question style, but they supplement rather than replace the official sources. For a full plan, see the D. ABDSM Study Guide; you can also try questions on our practice test site. A simple weighting-driven sequence looks like this:
Medical foundation
- Domain 1 and Domain 2 (26% combined)
- Domain 3 alternatives to OAT
Clinical workup and device work
- Domain 4 history, exam, imaging and consent
- Domains 5 and 6 appliance selection and calibration
Outcomes and special topics
- Domain 10 side effects and consent
- Domains 7, 8 and 9
Integration
- Timed mixed sets at roughly 72 seconds per question
- Revisit the 13% domains and any weak spots
This order front-loads the physiology and testing concepts that later domains build on, then moves into hands-on decisions, and finishes with the smaller domains and timed practice. If you want a sense of how demanding the exam is before committing to a timeline, read How Hard Is the D. ABDSM Exam?
Frequently Asked Questions
The exam has 150 multiple-choice questions to be completed in three hours. It is a proctored computer-based test administered by Kryterion at a test center or remotely, and it is offered twice yearly.
Domains 1, 2, 4 and 10 each carry the largest published weight at 13%. Weights are approximate for a typical exam and may vary, so prepare across all ten domains.
No. ABDSM does not require case submissions. Instead, you must complete the AADSM Mastery Program (or an AADSM-accredited Mastery Program) and meet the licensure, degree and residency requirements before applying.
Under the 2026 guidelines, new applicants or those reestablishing eligibility pay USD 995, and eligible standard retakes cost USD 395. Qualifying full-time US/Canadian Federal Service dentists pay USD 250, including eligible retakes.
Yes. Up to two retakes are permitted during your eligibility period, which lasts three years after Mastery Program completion. If eligibility lapses, you must repeat the Mastery Program or earn 65 additional qualifying CE hours from the prior three years that have not previously been submitted.
Use this sheet as a checklist, not a substitute for the official documents. Confirm every date, fee and policy against the current ABDSM guidelines, then build your study plan around the blueprint and reading list.