Part I — Angular Limb Deformities: Axis, Angles & CORA

In this first of a two-part BoardsCast series, we explore the foundational mechanics of angular limb deformity diagnosis and correction. Whether you’re preparing for boards or brushing up on osteotomy planning, this episode walks you step-by-step through:

• The difference between mechanical and anatomic axes
• Joint orientation angles (JFSA, LDFA, MPTA, JLCA) — and what “normal” looks like
• How to define and locate the CORA (Center of Rotation of Angulation)
• When to consider translation — and when it means you got the CORA wrong
• Tools for recognizing and classifying single vs. multi-plane deformities

With clear diagrams and board-focused questions woven throughout, this episode is your shortcut to confident, geometry-based surgical planning.

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