Part I (Written Examination): Core Knowledge and Test-Taking Strategy
What the written exam rewards
The Part I examination samples the full breadth of orthopaedic knowledge: basic science (biomechanics, bone and cartilage biology, biomaterials, microbiology), pediatric and adult reconstruction, trauma, spine, hand, foot and ankle, sports medicine, musculoskeletal oncology, and rehabilitation. Questions are typically single-best-answer, so the task is not to recall everything but to eliminate distractors efficiently.
Concepts you must own
Know the classic patterns cold: the Salter-Harris classification and its prognosis by type, the Gustilo-Anderson grading and its implications for antibiotics and fixation, the Neer and Lauge-Hansen frameworks, compartment syndrome diagnosis (clinical first; pressure thresholds), and the natural history of common conditions. Understand mechanism-to-injury translation: a valgus knee injury predicts a specific ligament and bone pattern. Basic science is high yield because it is unambiguous: stress-strain curves, fatigue failure, bone remodeling (Wolff's law), and antibiotic prophylaxis timing.
Traps to expect
Absolute words ("always," "never") usually mark wrong answers. Distractors often describe correct management of the wrong diagnosis, or a plausible but non-preferred imaging study. Watch for questions asking what is most likely versus most appropriate next step - these differ. Pediatric growth-plate questions frequently hinge on which physeal layer (hypertrophic zone) is injured.
Rule of thumb
When two answers seem right, choose the one that addresses the immediate life- or limb-threatening problem first (ATLS sequence, then limb). For classification questions, anchor on the single feature that defines the grade rather than the full description.
Worked example
An open tibial shaft fracture with a 12 cm wound and periosteal stripping is Gustilo-Anderson IIIB, not IIIA - the discriminator is soft-tissue coverage, not wound size alone. IIIB requires flap coverage; this distinction drives the answer more often than the size descriptor.