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Questions and Answers
What is femoral torsion?
What is femoral torsion?
- The relative rotation between the bone's shaft and neck. (correct)
- The angle between the femur and the hip joint.
- The degree to which the acetabulum covers the femoral head
- The angle at which the femur attaches to the pelvis.
What is the normal anteversion angle?
What is the normal anteversion angle?
- About 10 degrees
- About 15 degrees (correct)
- About 20 degrees
- About 25 degrees
What can excessive anteversion or retroversion cause?
What can excessive anteversion or retroversion cause?
- Hip dislocation
- Articular incongruence
- Osteoarthritis
- All of the above (correct)
What is the typical femoral anteversion in healthy infants at birth?
What is the typical femoral anteversion in healthy infants at birth?
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What is the typical femoral anteversion in teenagers?
What is the typical femoral anteversion in teenagers?
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What is "in-toeing"?
What is "in-toeing"?
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Who is excessive femoral anteversion common in?
Who is excessive femoral anteversion common in?
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What does the center-edge angle indicate?
What does the center-edge angle indicate?
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What does a low center-edge angle indicate?
What does a low center-edge angle indicate?
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What does a high center-edge angle suggest?
What does a high center-edge angle suggest?
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Study Notes
- Femoral torsion is the relative rotation between the bone's shaft and neck.
- A normal anteversion angle is about 15 degrees.
- Excessive anteversion or retroversion can cause hip dislocation, articular incongruence, and osteoarthritis.
- Healthy infants are born with about 40 degrees of femoral anteversion, which usually reduces to about 15 degrees by 16 years of age.
- Excessive femoral anteversion can cause an abnormal gait pattern called "in-toeing."
- Excessive femoral anteversion is common in persons with cerebral palsy.
- The center-edge angle indicates the degree to which the acetabulum covers the femoral head.
- A low center-edge angle indicates reduced acetabular coverage of the femoral head, which can increase joint pressure and lead to premature degeneration or osteoarthritis of the hip.
- A high center-edge angle suggests excessive coverage of the femoral head by the acetabulum, which may lead to impingement and injury to the hip during certain motions.
- The acetabular anteversion angle measures the extent to which the acetabulum faces anteriorly and can cause abnormal stress on the joint interface if it is close to zero or negative.
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