Arthroplasty complications

Question 1

Answer 1

Question 2

Answer 2

Question 3

Answer 3

Question 4

Answer 4

Question 5

Answer 5

Question 6

Answer 6

Question 7

Answer 7

Question 8

Answer 8

Question 9

Answer 9

Question 10

Answer 10

Question 11

What conditions predispose to THA dislocation?

Answer 11

• Increased lateral inclination of the acetabular cup (this may also increase the risk of poly wear of the acetabular liner)
• Decreased or increased anteversion of the cup
• Excessive lateral positioning of the acetabular cup
• Increased or decreased anteversion of the femoral stem

Question 12

In a cemented THA, should you see lucency at the bone cemeent or cement prothesis interface?

Answer 12

Ideally you don’t expect any lucenies at these interfaces. “A lucency at the metal-cement interface along the proximal lateral aspect of the femoral stem may be seen on the initial postoperative radiograph as a reflection of suboptimal metal-cement contact at the time of surgery.”

https://radiologyassistant.nl/musculoskeletal/hip/arthroplasty

Question 13

_____ mm cement around the cemented THA is normal

Answer 13

3-4 mm. Abundant cement packing leads to loosening

Question 14

particle disease is a result of

Answer 14

polyethylene wear. It is a histiocytic response that occurs as a results of macrophage reaction to shed components such as small poly wear particles

Question 15

Answer 15

Question 16

Answer 16