Femoral Neck Fractures - Semantic Scholar
Femoral Neck Fractures
Carol Lin, MD & Brad Merk, MD
Original Authors: Brian Boyer, MD; March 2004 Steven A. Olson, MD; March 2006 James C. Krieg, MD; May 2011
Revised: March 2016
Epidemiology
? > 300,000 Hip fractures annually in the US
? Accounts for 30% of all hospitalizations ? Expected to surpass 6 million annually
worldwide by 2050
? Significant morbidity, mortality, expense
? $10-15 billion/year in the US
data/hcup; Kannus et al, Bone 1996; Dy et al, JBJS 2011
Epidemiology: Bimodal Distribution
? Elderly
? incidence doubles each decade beyond age 50
? higher in caucasians ? smokers, lower BMI, excessive caffeine & ETOH
? Young
? high energy trauma
Anatomy
? Physeal closure age 16 ? Neck-shaft angle
130? ? 7? ? Anteversion
10? ? 7? ? Calcar Femorale
Posteromedial dense plate of bone
calcar
Images from: Court-Brown, C. et al. Rockwood & Greens Fractures in Adults. Philadelphia: Lippincott Williams & Wilkins, 2014
Blood Supply
? Lateral epiphysel artery
? terminal branch MFC artery ? predominant blood supply to
weight bearing dome of head
? After fracture, blood supply depends on retinacular vessels
Images from: Court-Brown, C. et al. Rockwood & Greens Fractures in Adults. Philadelphia: Lippincott Williams & Wilkins, 2014
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