Advanced Femoral Head Quiz

Q1. Why can a displaced intracapsular femoral neck fracture threaten the femoral head?

• It can disrupt retinacular vessels supplying the head
• It always transects the femoral artery
• It interrupts the popliteal artery
• It removes the acetabular labrum

Q2. Which vascular supply is especially important for the superior portion of the adult femoral head?

• Dorsal metatarsal arteries
• Anterior tibial recurrent vessels
• Superior retinacular branches of the medial circumflex femoral artery
• Inferior epigastric vessels

Q3. Why is the artery in the ligament of the head usually unable to compensate for major retinacular vessel disruption in an adult?

• Its contribution is usually too limited in adults
• It is a vein rather than an artery
• It supplies only the knee joint
• It terminates in the greater trochanter

Q4. What is avascular necrosis of the femoral head?

• Ischemic bone death that may lead to femoral head collapse
• An isolated fracture of the greater trochanter
• Inflammation limited to the acetabular labrum
• Congenital absence of the femoral neck

Q5. Why can subchondral collapse of the femoral head cause secondary hip degeneration?

• It disrupts articular congruity and load distribution
• It improves acetabular fit
• It strengthens articular cartilage
• It prevents contact with the acetabulum

Q6. How does the femoral neck improve the mechanical relationship between the head and shaft?

• It prevents all hip rotation
• It offsets the head from the shaft to facilitate motion and force transmission
• It places the head directly inside the shaft axis
• It disconnects the head from weight bearing

Q7. Why is preservation of femoral head sphericity important?

• It eliminates the need for articular cartilage
• It prevents the head from contacting the acetabulum
• It maintains congruent load-bearing contact with the acetabulum
• It transfers all load to the greater trochanter

Q8. What does the extensive articular cartilage coverage of the femoral head reflect?

• Its broad participation in loaded hip articulation
• Its position outside the hip capsule
• Its role as the main attachment site for thigh muscles
• Its function as a nonarticular process

Q9. Why can traumatic hip dislocation endanger the femoral head even without a femoral neck fracture?

• It cannot affect femoral head perfusion
• It removes the greater trochanter
• It always fractures the tibia
• It can injure femoral head vessels and articular cartilage

Q10. Which statement best integrates the anatomy of the femoral head?

• It is part of the pelvic acetabular rim
• It is a nonarticular quadriceps attachment site
• It is the proximal femoral articular surface for hip motion and load transmission with a vulnerable retinacular blood supply
• It is a distal femoral process forming the knee