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KMID : 0386719960080010098
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Journal of the Korean Hip Society
1996 Volume.8 No. 1 p.98 ~ p.102
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Catastrophic failure of the Polythylene Liner in Uncemented Metal-backed Acetabular Component
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최원식
이광원/김환정/박미자/김유인/손문호
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Abstract
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Uncemented total hip arthroplasty has been popular recently has been popular recently because of problems of aseptic loosening of the cemented implants. But, catastrophic faiure of the metal-backed cup has been increased due to wearthrough or
fracture
of the polyethylene liner after primary total hip arthroplasty. We report four catastrophic failures of the polyethylene liner of one design of total hip arthroplasty. Failure occurred as a result of either Wearthrough' or Wear/Fracture' of
polyethylene
liner to the metal backing, at the average of 5.4 years(range: 4.6 to 6.6 years) after implantation. All patients were men and aged from 25 to 60 years(average age:43.3 years).
@ES The results were obtained as follows.
@EN 1. Serial radiographs showed progressive liner wear/fracture and the operative findings were com patible.
2. Catastrophic failure was seen only in cups with a minimum polyethylene thickness of less than 5mm.
3. It seems likely that catastrophic failure of polyethylene liner will be seen with greater frquency in the future and that patient should be carefully followed so that revision, if it is needed, can be done with the minimum delay to avoid
debris
formation and osteolysis.
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