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dislocation
81%
3366/4175
failure of the femoral component
0%
20/4175
extensive osteolysis
6%
242/4175
failure of the fixation between the liner and the acetabular shell
10%
436/4175
fracture of the polyethylene
2%
92/4175
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Multiple studies have shown the most common complication of revision surgery with polyethylene exchange is dislocation. Lachiewicz et al reviewed 35 hips with 1st generation components (Harris-Galante porous HGP I and II acetabular components) underwent polyethylene exchange without cement. There were no instances of loosening but 7 hips dislocated. Boucher et al assessed 24 hips which underwent polyethylene liner exchange and found 25% dislocated at least once. Beaule et al examined 32 hips which underwent polyethylene exchange by cementing a new liner into the existing fixed cementless acetabular component and found 22% dislocated. Incorrect Answers: The other complications listed were noted at much lower rates in all 3 studies if at all.
4.3
(28)
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