Advanced Acetabulum Quiz

Q1. Why can reduced acetabular coverage increase hip instability and cartilage stress?

• It increases contact area and eliminates focal stress
• It affects only knee stability
• It decreases femoral head containment and increases focal articular stress
• The acetabulum has no role in femoral head containment

Q2. How does acetabular dysplasia alter hip biomechanics?

• It prevents all hip movement
• It deepens the socket and eliminates labral stress
• It changes only distal femoral alignment
• It reduces femoral head coverage and can increase edge loading

Q3. Why is the triradiate cartilage important in acetabular development?

• It develops only after skeletal maturity
• It is the principal adult hip ligament
• It contributes to growth and shaping of the developing acetabulum
• It forms the adult femoral head cartilage

Q4. Why can an acetabular fracture impair hip function even when the femoral head is intact?

• The femoral head does not contact the acetabulum
• Only femoral shaft fractures affect hip mechanics
• The acetabulum does not transmit load
• It can disrupt socket congruity and femoral head containment

Q5. What do the anterior and posterior columns represent in acetabular fracture anatomy?

• The two menisci of the hip
• Structural portions of the hip bone supporting the acetabulum
• The medial and lateral femoral condyles
• Two ligaments within the femoral head

Q6. Why is accurate restoration of the acetabular articular surface important after a displaced fracture?

• The acetabulum is normally nonarticular
• It helps restore normal contact mechanics and load distribution
• Articular irregularity improves stability
• Congruity has no effect on hip loading

Q7. How can acetabular labral injury reduce hip stability?

• It can reduce socket depth and compromise the stabilizing seal
• It prevents the femoral head from contacting cartilage
• It automatically strengthens the hip capsule
• The labrum has no mechanical role

Q8. Why is acetabular orientation important to normal hip mechanics?

• It influences coverage, motion, and joint contact stress
• It controls the shape of the lateral malleolus
• It has no effect on hip mechanics
• It determines only tibial rotation

Q9. How is force transmitted through the acetabulum during weight bearing?

• From the tibia directly into the iliac crest
• From the patella through the acetabular notch
• From the fibula directly into the acetabular fossa
• From the femoral head through the lunate surface into the pelvis

Q10. Which statement best integrates the anatomy of the acetabulum?

• It is a composite pelvic socket whose articular surface, rim, labrum, development, and orientation support hip stability and load transmission
• It is a distal femoral depression that forms the knee joint
• It is a nonarticular opening formed only by the pubis
• It is a tibial socket for the talus