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About this exam

Board certification in orthodontics is a voluntary professional credential that signals a practitioner has met a peer-reviewed standard of clinical competence beyond state licensure. The American Board of Orthodontics administers the process, and this exam is intended for orthodontists who have completed accredited specialty training and want to demonstrate mastery to patients, referring dentists, and hospital or academic employers. The assessment is case-based and records-driven, so it tests judgment rather than recall: you must defend diagnosis, treatment planning, biomechanics, appliance management, skeletal anchorage and surgical coordination, cleft and craniofacial care, TMD and orofacial pain, retention, ethics, and critical appraisal of the literature. Preparation is best treated as a clinical audit. Review your own finished cases against objective grading criteria, identify where outcomes fell short and why, and rehearse concise verbal defenses of your records. Read current systematic reviews in each domain and practice explaining study design weaknesses. Because the board periodically revises formats, eligibility, and scoring, confirm all administrative details, including current fees, time limits, and retake rules, directly with the American Board of Orthodontics rather than relying on secondary summaries. This page is independent study material and is not affiliated with or endorsed by the board.

What you'll study

Common questions

About BCO preparation

What is the format of the exam?

Expect a combination of written testing and a case-based clinical assessment in which examiners review your submitted records and question your decisions. Some components are oral. The board periodically revises the structure, so verify the current format, submission requirements, and record specifications on the official American Board of Orthodontics website before you plan your preparation.

How difficult is it compared with the written specialty exam?

Candidates generally find the case-defense portion harder because there is no single correct answer to memorize. Examiners probe why you chose a mechanics plan, what you would change, and how you recognized a compromised outcome. Depth of honest self-appraisal matters more than volume of facts. Strong clinical records and clear reasoning carry more weight than reciting textbook lists.

Can I retake it if I do not pass?

Retake and reapplication policies are set by the board and change over time, including waiting periods and whether a new case set is required. Do not rely on what a colleague experienced several cycles ago. Check the current candidate guide or contact the board directly for the applicable rules before you submit records or schedule any component.

How long should I plan to prepare?

Most candidates spend several months, because record collection and case write-ups cannot be rushed. Start by auditing your completed cases for adequate documentation and diversity. Then build a reading schedule across all domains, weighted toward areas where your practice is thin, such as cleft care or orthognathic coordination. Reserve the final weeks for rehearsing spoken case defenses.

In what order should I study the domains?

Begin with diagnosis and treatment planning, since every other domain depends on it, then biomechanics and appliance management. Follow with skeletal anchorage and surgery, growth, cleft care, TMD, and retention. Save ethics and evidence-based practice for regular short sessions throughout, because they reward steady review rather than last-minute cramming and appear within case discussions.

What causes candidates to fail?

Common problems include incomplete or inconsistent records, cases that all look alike and fail to demonstrate breadth, and inability to justify a decision under questioning. Another frequent issue is defensiveness: examiners want to see that you recognize a compromised result and can explain its cause. Poorly organized documentation that forces examiners to search for information also hurts.

Do I need to submit treated cases?

Historically the clinical examination has required a set of completed cases with full records, including models or digital equivalents, radiographs, photographs, and treatment notes. Exact numbers, case categories, and acceptable formats are set by the board and revised periodically. Confirm current requirements and deadlines on the official site well before your intended application cycle.

How should I prepare for the oral questioning?

Practice presenting each case aloud in a few minutes: problem list, plan, mechanics, outcome, and what you would do differently. Invite a colleague to interrupt with challenging questions. Record yourself and check whether your reasoning is easy to follow. Examiners are assessing clinical judgment under pressure, not memorized trivia, so clarity and honesty outperform confident bluffing.

Does board certification need to be renewed?

Yes, certification is time-limited and maintained through a renewal process that typically involves continuing education and ongoing case or practice documentation. The specific cycle length, accepted activities, and fees are determined by the board and can change. Confirm your personal renewal deadline and requirements directly with the American Board of Orthodontics.

Where can I confirm fees, dates, and eligibility?

Only the American Board of Orthodontics publishes authoritative information on eligibility, application windows, fees, examination dates, and scoring. This page is independent study material and is not affiliated with the board. Treat any figure you see elsewhere, including in study groups, as unverified until you confirm it on the official website or in writing from the board.