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  • Title: Incidence and volume of pelvic osteolysis at early follow-up with highly cross-linked and noncross-linked polyethylene.
    Author: Leung SB, Egawa H, Stepniewski A, Beykirch S, Engh CA, Engh CA.
    Journal: J Arthroplasty; 2007 Sep; 22(6 Suppl 2):134-9. PubMed ID: 17823032.
    Abstract:
    Highly cross-linked polyethylene has shown decreased wear rates as compared to conventional polyethylene. However, the impact of this decrease on the occurrence of osteolysis remains uncertain. Forty hips implanted with noncross-linked Enduron and 36 implanted with 5-Mrad cross-linked Marathon polyethylene had a computed tomography at a minimum of 5 years after arthroplasty. Polyethylene wear, osteolysis incidence, location, and volume were compared. The incidence of osteolysis was statistically greater for patients with noncross-linked Enduron (11/40, 28%) compared to patients with the moderately cross-linked Marathon (3/36, 8%; P = .04). The average lesion volume for hips with Enduron liners (7.5 +/- 6.7 cm(3)) was significantly greater than the average lesion volume for hips implanted with Marathon liners (1.2 +/- 0.1 cm(3), P = .01). Marathon cross-linked polyethylene has shown to have a decreased incidence and volume of pelvic osteolysis. Longer follow-up is necessary to determine if Marathon cross-linked polyethylene will continue to demonstrate the encouraging improved wear and osteolysis characteristics.
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