BCO study guide
BCO · Work through your exam, one topic at a time.
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 BCO study guide has 10 sections and about 2,523 words.
01Diagnosis and Treatment Planning
Sound diagnosis begins with the chief complaint in the patient's own words, then moves through problem-oriented records: history, clinical exam, study casts, intraoral and extraoral photographs, panoramic and cephalometric radiographs, and when indicated CBCT. The candidate must be fluent in the components of a problem list - skeletal, dental, soft tissue, functional, periodontal, and psychosocial - and must be able to sequence treatment goals against growth status, cooperation, and caries risk.
312 words, about 2 min02Craniofacial Growth and Development
Candidates must understand the mechanisms of craniofacial growth: sutural growth, apposition and resorption, endochondral versus intramembranous ossification, and the concept of displacement and remodeling. Know the cephalocaudal gradient and the adolescent growth spurt, and know how to assess maturity - chronological age, dental age, skeletal age via hand-wrist or cervical vertebral maturation, and the pubertal peak.
286 words, about 1 min03Biomechanics and Orthodontic Tooth Movement
Understand the difference between force, moment, and couple, and how a moment-to-force ratio determines the center of rotation. Know that a pure force moves the tooth bodily through the center of resistance, while a moment produces rotation.
286 words, about 1 min04Appliance Design and Clinical Management
Know the major appliance systems: fixed labial and lingual brackets, clear aligners, removable functional appliances, headgear, and palatal expanders. Understand the design features that matter clinically - bracket prescription (tip, torque, in-out), slot size, ligation type, and archwire sequence.
287 words, about 1 min05Skeletal Anchorage and Orthognathic Surgery
Understand the principles of temporary anchorage devices (TADs): mini-implants, miniplates, and palatal implants. Know the anatomic sites and their risks - interradicular placement risks root contact, the infrazygomatic crest offers strong anchorage, and the palate provides thin keratinized tissue in some zones.
269 words, about 1 min06Cleft Lip and Palate and Craniofacial Anomalies
Understand the embryology of the face and the timing of palatal fusion, and know the difference between cleft lip with or without cleft palate and isolated cleft palate. Know the classification systems and the associated syndromes - Van der Woude, Stickler, Treacher Collins, and Pierre Robin sequence - and the importance of a multidisciplinary team.
253 words, about 1 min07Temporomandibular Disorders and Orofacial Pain
Understand the biopsychosocial model of temporomandibular disorders and the distinction between muscle disorders, disc displacement, and degenerative joint disease. Know the components of a focused history and examination: palpation, range of motion, joint sounds, and imaging when indicated.
222 words, about 1 min08Retention and Stability
Understand the causes of relapse: periodontal reorganization, gingival fibers, occlusal factors, growth, and neuromuscular adaptation. Know the difference between relapse and physiologic change with age.
195 words, under 1 min09Ethics, Professionalism, and Practice Management
Understand the core principles - autonomy, beneficence, nonmaleficence, and justice - and how they apply to informed consent, confidentiality, and conflicts of interest. Know the requirements for valid informed consent, including discussion of alternatives, risks, and the patient's right to refuse.
214 words, about 1 min10Evidence-Based Practice and Critical Literature Review
Understand the hierarchy of evidence: systematic reviews and meta-analyses, randomized controlled trials, cohort and case-control studies, case series, and expert opinion. Know the strengths and limitations of each and the difference between efficacy and effectiveness.
199 words, under 1 min