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Pubmed for Handhelds

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  • Title: A comparison of a second- and a third-generation modular cup design: is new improved?
    Author: Powers CC, Ho H, Beykirch SE, Huynh C, Hopper RH, Engh CA, Engh CA.
    Journal: J Arthroplasty; 2010 Jun; 25(4):514-21. PubMed ID: 19361949.
    Abstract:
    The highly cross-linked polyethylene liners currently used with modular uncemented cups have substantially decreased wear and osteolysis at early follow-up. However, retroacetabular osteolysis has still been reported in some cases with DePuy Orthopaedic's (Warsaw, IN) second-generation Duraloc acetabular shell. DePuy's third-generation Pinnacle cup incorporates a different shell-liner locking mechanism. We compared the clinical outcome among a matched series of 42 Duraloc and 42 Pinnacle cups at a mean follow-up of 5.9 years. Although the Harris Hip Scores and wear rates were not statistically different between the 2 cup designs, retroacetabular osteolysis behind the central hole was absent among the Pinnacle cups but noted among 19% of the Duraloc cups.
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