Hip deformities can lead to abnormal muscle force
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Questions and Answers

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?

  • About 10 degrees
  • About 15 degrees (correct)
  • About 20 degrees
  • About 25 degrees
  • 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?

    <p>About 40 degrees</p> Signup and view all the answers

    What is the typical femoral anteversion in teenagers?

    <p>About 15 degrees</p> Signup and view all the answers

    What is "in-toeing"?

    <p>An abnormal gait pattern caused by excessive femoral anteversion.</p> Signup and view all the answers

    Who is excessive femoral anteversion common in?

    <p>Persons with cerebral palsy</p> Signup and view all the answers

    What does the center-edge angle indicate?

    <p>The degree to which the acetabulum covers the femoral head</p> Signup and view all the answers

    What does a low center-edge angle indicate?

    <p>Reduced acetabular coverage of the femoral head</p> Signup and view all the answers

    What does a high center-edge angle suggest?

    <p>Excessive acetabular coverage of the femoral head</p> Signup and view all the answers

    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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