Methods of Carrying External Loads and Hip Abductor Muscles

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What is the recommended method of carrying an object for an individual with unilateral hip pain or degeneration?

With the contralateral arm

With both arms simultaneously

With the dominant arm

With the ipsilateral arm (correct)

Which action should a person with painful, unstable, or surgically replaced hips be cautious about?

Carrying large hand-held loads ipsilateral to the affected hip

Performing high-impact exercises

Running long distances

Carrying large hand-held loads contralateral to the affected hip (correct)

In total hip arthroplasty, what is replaced with biologically inert materials?

Hip abductor muscles

Acetabulum and femoral head (correct)

Leg bones

Knee cap

Which type of fixation may secure a prosthetic hip in total hip arthroplasty?

Biologic fixation provided by bone growth into implanted components Signup and view all the answers

What is the consequence of carrying an object with the contralateral arm for an individual with hip pain or degeneration?

Greater joint reaction force Signup and view all the answers

Why is it advised to carry an object with the ipsilateral arm for someone with unilateral hip pain or degeneration?

To decrease compression force on the hip joint Signup and view all the answers

What may contribute to the loss of fixation in total hip arthroplasty?

Torsional loads between the prosthetic implant and bony interface Signup and view all the answers

Which factor can result in osteolysis and weakening of the surrounding bone in total hip arthroplasty?

Worn implanted component debris Signup and view all the answers

What is the surgical operation that involves intentionally altering the angle of inclination of the femoral head to the acetabulum by cutting a wedge of bone from the proximal femur?

Coxa vara (or valga) osteotomy Signup and view all the answers

What is a characteristic of coxa valga?

The angle is greater than the normal adult angle Signup and view all the answers

What is one of the goals of a coxa vara (or valga) osteotomy?

To improve weight-bearing surface congruency of the hip Signup and view all the answers

What is a potential complication that may arise from total hip arthroplasty?

Dislocation of prosthetic hip Signup and view all the answers

What is the effect of excessive anteversion on the hip joint?

Lead to marked joint incongruence Signup and view all the answers

How does the femur respond to excessive anteversion to restore joint congruence?

Medially rotate Signup and view all the answers

What gait abnormality is typically seen in a patient with excessive anteversion?

Toe-in gait Signup and view all the answers

What effect does femoral retroversion have on the labrum?

Result in crushing of the labrum Signup and view all the answers

Who is more likely to experience femoral neck fractures?

Elderly adults with good bone density Signup and view all the answers

At what age do more than 90 percent of femoral neck fractures occur?

Over 50 years old Signup and view all the answers

What is a potentially positive effect of coxa valga?

Improved force-generating ability of hip abductor muscles Signup and view all the answers

Which of the following is a potentially negative effect of coxa valga?

Decreased moment arm available to hip abductor force Signup and view all the answers

How does coxa valga affect the risk of dislocation in extreme cases?

Increases the risk of dislocation Signup and view all the answers

What is a characteristic of coxa vara's angle of inclination compared to the normal adult angle?

Less than 125⸰ Signup and view all the answers

How does coxa vara affect the position of the femoral head?

Deeper into the acetabulum Signup and view all the answers

What is a potential positive effect of coxa vara?

Improved stability of hip joint Signup and view all the answers

How does coxa vara potentially benefit people with hip abductor weakness?

By increasing the leverage of the abductor muscles Signup and view all the answers

What potential negative effect of coxa vara increases the likelihood of a 'gluteus medius limp?'

Coxa vara may decrease the functional length of the hip abductor muscles. Signup and view all the answers

How does excessive femoral anteversion affect the angle of torsion?

It increases the angle of torsion Signup and view all the answers

What is a potential consequence of marked coxa vara in children?

Slipped capital femoral epiphysis Signup and view all the answers

How does a varus osteotomy potentially improve joint stability?

By aligning the femoral head more directly into the acetabulum Signup and view all the answers

What is one potential benefit of reducing muscular-based joint forces in an arthritic or unstable prosthetic hip?

Decreased excessive wear during walking Signup and view all the answers