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  • Title: Separation of the polyethylene liner from acetabular cup metal backing. A report of three cases.
    Author: Ries MD, Collis DK, Lynch F.
    Journal: Clin Orthop Relat Res; 1992 Sep; (282):164-9. PubMed ID: 1516308.
    Abstract:
    In three young patients with cementless Porous Coated Anatomic (PCA) total hip prostheses implanted two to four years previously, the polyethylene liner separated from metal backing. These cups were of the original PCA design, manufactured and packaged as single assembled components, rather than the more recent two-piece components packaged with interchangeable liners separate from the metal backing. Each case of separation was associated with the failure of the thin outer polyethylene rim and central polyethylene peg on the back of the liner that secures it to the metal backing. Cup liners should be securely attached to the metal backing. The possibility of polyethylene failure is considerable when cementless metal-backed acetabular cups are used in active young patients.
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