The 5-minute revision cut of the full OrthoVellum lecture: Femoral Head Osteonecrosis — Preserve or Replace?. Just the teaching core — every diagram and every rule, no intro, no recap. Watch the full lecture on the OrthoVellum channel for the complete build-up, and visit Orthovellum.com for the written topic with references. Educational only — not individual medical advice. Always consult a qualified clinician. #Orthopaedics #Orthopedics #MedEd #OrthoVellum #OrthopaedicSurgery