Practise American Board of Orthodontics Written Examination with a short sample and answer explanations. These are independent learning materials, not official exam questions or a pass prediction.
Exam outline and official sources
American Board of Orthodontics · Current online Examination Specifications, checked against the 2026 Written Examination Study Guide bearing the revision imprint 07.02.2025. The specifications show no separate effective date. As of 2026-10-17, ABO links the 2027 reading list, whose resources were verified in July 2026; the currently linked study guide remains labeled 2026.
This original 20-question sample covers selected topics across the outline. It does not reproduce official exam questions or cover every tested topic.
- ABO — Written Examination
- ABO — Examination Specifications
- ABO Written Examination Study Guide 2026
- ABO — Downloads and Resources
- ABO Written Examination Reading List 2027
- ABO Cephalometric Review, revised March 14, 2025
- Kanzaki et al. — Local OPG gene transfer to periodontal tissue inhibits orthodontic tooth movement
- MedlinePlus Genetics — Cleidocranial dysplasia
- MedlinePlus Genetics — RUNX2 gene
- Subramanian et al. — PTH1R Mutants Found in Patients with Primary Failure of Tooth Eruption Disrupt G-Protein Signaling
- ADA — Chewing Gum
- CDC — Cleft Lip/Cleft Palate
- NIDCR — TMD
- FDA — Dental Cone-beam Computed Tomography
- FDA — Statistical Guidance on Reporting Results from Studies Evaluating Diagnostic Tests
- CDC — Best Practices for Sterilization Monitoring in Dental Settings
- ADA — Fluoride: Topical and Systemic Supplements
- AAPD — Management of the Developing Dentition and Occlusion in Pediatric Dentistry, revision 2024
- Smith and Burstone — Mechanics of tooth movement
- Miura et al. — The super-elastic property of the Japanese NiTi alloy wire for use in orthodontics
- EFP — Stage IV Periodontitis Guideline: Case Type 2
- Sondeijker et al. — Development of a clinical practice guideline for orthodontically induced external apical root resorption
- American Heart Association — 2025 Adult Basic Life Support
- ADA — Types of Consent
American Board of Orthodontics Written Examination
Start with 20 free questions, then review the explanations and any topics you missed.
In an experimental orthodontic model, local osteoprotegerin expression increases while the applied force remains unchanged. Which response best explains the resulting reduction in tooth movement?
American Board of Orthodontics Written Examination
Flashcards
Biomedical Sciences
Genetic Disorders — RUNX2 function
Get started with American Board of Orthodontics Written Examination
Purchase your plan, then choose the module to enable. Your plan renews until canceled.
Monthly exam plan
$147 / month
About $4.90 per day
Enable one exam module after payment
Published questions, flashcards and study tools
Renews until canceled
Yearly exam plan
$1337 / year
About $3.66 per day
Enable one exam module after payment
Published questions, flashcards and study tools
Renews until canceled
Found an issue? See our content policy and report a correction.